Senator Chides FBI for Weak Advice on Mobile Security

Agents with the Federal Bureau of Investigation (FBI) briefed Capitol Hill staff recently on hardening the security of their mobile devices, after a contacts list stolen from the personal phone of the White House Chief of Staff Susie Wiles was reportedly used to fuel a series of text messages and phone calls impersonating her to U.S. lawmakers. But in a letter this week to the FBI, one of the Senate’s most tech-savvy lawmakers says the feds aren’t doing enough to recommend more appropriate security protections that are already built into most consumer mobile devices.

On May 29, The Wall Street Journal reported that federal authorities were investigating a clandestine effort to impersonate Ms. Wiles via text messages and in phone calls that may have used AI to spoof her voice. According to The Journal, Wiles told associates her cellphone contacts were hacked, giving the impersonator access to the private phone numbers of some of the country’s most influential people.

The execution of this phishing and impersonation campaign — whatever its goals may have been — suggested the attackers were financially motivated, and not particularly sophisticated.

“It became clear to some of the lawmakers that the requests were suspicious when the impersonator began asking questions about Trump that Wiles should have known the answers to—and in one case, when the impersonator asked for a cash transfer, some of the people said,” the Journal wrote. “In many cases, the impersonator’s grammar was broken and the messages were more formal than the way Wiles typically communicates, people who have received the messages said. The calls and text messages also didn’t come from Wiles’s phone number.”

Sophisticated or not, the impersonation campaign was soon punctuated by the murder of Minnesota House of Representatives Speaker Emerita Melissa Hortman and her husband, and the shooting of Minnesota State Senator John Hoffman and his wife. So when FBI agents offered in mid-June to brief U.S. Senate staff on mobile threats, more than 140 staffers took them up on that invitation (a remarkably high number considering that no food was offered at the event).

But according to Sen. Ron Wyden (D-Ore.), the advice the FBI provided to Senate staffers was largely limited to remedial tips, such as not clicking on suspicious links or attachments, not using public wifi networks, turning off bluetooth, keeping phone software up to date, and rebooting regularly.

“This is insufficient to protect Senate employees and other high-value targets against foreign spies using advanced cyber tools,” Wyden wrote in a letter sent today to FBI Director Kash Patel. “Well-funded foreign intelligence agencies do not have to rely on phishing messages and malicious attachments to infect unsuspecting victims with spyware. Cyber mercenary companies sell their government customers advanced ‘zero-click’ capabilities to deliver spyware that do not require any action by the victim.”

Wyden stressed that to help counter sophisticated attacks, the FBI should be encouraging lawmakers and their staff to enable anti-spyware defenses that are built into Apple’s iOS and Google’s Android phone software.

These include Apple’s Lockdown Mode, which is designed for users who are worried they may be subject to targeted attacks. Lockdown Mode restricts non-essential iOS features to reduce the device’s overall attack surface. Google Android devices carry a similar feature called Advanced Protection Mode.

Wyden also urged the FBI to update its training to recommend a number of other steps that people can take to make their mobile devices less trackable, including the use of ad blockers to guard against malicious advertisements, disabling ad tracking IDs in mobile devices, and opting out of commercial data brokers (the suspect charged in the Minnesota shootings reportedly used multiple people-search services to find the home addresses of his targets).

The senator’s letter notes that while the FBI has recommended all of the above precautions in various advisories issued over the years, the advice the agency is giving now to the nation’s leaders needs to be more comprehensive, actionable and urgent.

“In spite of the seriousness of the threat, the FBI has yet to provide effective defensive guidance,” Wyden said.

Nicholas Weaver is a researcher with the International Computer Science Institute, a nonprofit in Berkeley, Calif. Weaver said Lockdown Mode or Advanced Protection will mitigate many vulnerabilities, and should be the default setting for all members of Congress and their staff.

“Lawmakers are at exceptional risk and need to be exceptionally protected,” Weaver said. “Their computers should be locked down and well administered, etc. And the same applies to staffers.”

Weaver noted that Apple’s Lockdown Mode has a track record of blocking zero-day attacks on iOS applications; in September 2023, Citizen Lab documented how Lockdown Mode foiled a zero-click flaw capable of installing spyware on iOS devices without any interaction from the victim.

Earlier this month, Citizen Lab researchers documented a zero-click attack used to infect the iOS devices of two journalists with Paragon’s Graphite spyware. The vulnerability could be exploited merely by sending the target a booby-trapped media file delivered via iMessage. Apple also recently updated its advisory for the zero-click flaw (CVE-2025-43200), noting that it was mitigated as of iOS 18.3.1, which was released in February 2025.

Apple has not commented on whether CVE-2025-43200 could be exploited on devices with Lockdown Mode turned on. But HelpNetSecurity observed that at the same time Apple addressed CVE-2025-43200 back in February, the company fixed another vulnerability flagged by Citizen Lab researcher Bill Marczak: CVE-2025-24200, which Apple said was used in an extremely sophisticated physical attack against specific targeted individuals that allowed attackers to disable USB Restricted Mode on a locked device.

In other words, the flaw could apparently be exploited only if the attacker had physical access to the targeted vulnerable device. And as the old infosec industry adage goes, if an adversary has physical access to your device, it’s most likely not your device anymore.

I can’t speak to Google’s Advanced Protection Mode personally, because I don’t use Google or Android devices. But I have had Apple’s Lockdown Mode enabled on all of my Apple devices since it was first made available in September 2022. I can only think of a single occasion when one of my apps failed to work properly with Lockdown Mode turned on, and in that case I was able to add a temporary exception for that app in Lockdown Mode’s settings.

My main gripe with Lockdown Mode was captured in a March 2025 column by TechCrunch’s Lorenzo Francheschi-Bicchierai, who wrote about its penchant for periodically sending mystifying notifications that someone has been blocked from contacting you, even though nothing then prevents you from contacting that person directly. This has happened to me at least twice, and in both cases the person in question was already an approved contact, and said they had not attempted to reach out.

Although it would be nice if Apple’s Lockdown Mode sent fewer, less alarming and more informative alerts, the occasional baffling warning message is hardly enough to make me turn it off.

Pakistan Arrests 21 in ‘Heartsender’ Malware Service

Authorities in Pakistan have arrested 21 individuals accused of operating “Heartsender,” a once popular spam and malware dissemination service that operated for more than a decade. The main clientele for HeartSender were organized crime groups that tried to trick victim companies into making payments to a third party, and its alleged proprietors were publicly identified by KrebsOnSecurity in 2021 after they inadvertently infected their computers with malware.

A report from the Pakistani media outlet Dawn states that authorities there arrested 21 people alleged to have operated Heartsender, a spam delivery service whose homepage openly advertised phishing kits targeting users of various Internet companies, including Microsoft 365, Yahoo, AOL, Intuit, iCloud and ID.me. Pakistan’s National Cyber Crime Investigation Agency (NCCIA) reportedly conducted raids in Lahore’s Bahria Town and Multan on May 15 and 16.

The NCCIA told reporters the group’s tools were connected to more than $50m in losses in the United States alone, with European authorities investigating 63 additional cases.

“This wasn’t just a scam operation – it was essentially a cybercrime university that empowered fraudsters globally,” NCCIA Director Abdul Ghaffar said at a press briefing.

In January 2025, the FBI and the Dutch Police seized the technical infrastructure for the cybercrime service, which was marketed under the brands Heartsender, Fudpage and Fudtools (and many other “fud” variations). The “fud” bit stands for “Fully Un-Detectable,” and it refers to cybercrime resources that will evade detection by security tools like antivirus software or anti-spam appliances.

The FBI says transnational organized crime groups that purchased these services primarily used them to run business email compromise (BEC) schemes, wherein the cybercrime actors tricked victim companies into making payments to a third party.

Dawn reported that those arrested included Rameez Shahzad, the alleged ringleader of the Heartsender cybercrime business, which most recently operated under the Pakistani front company WeCodeSolutions. Mr. Shahzad was named and pictured in a 2021 KrebsOnSecurity story about a series of remarkable operational security mistakes that exposed their identities and Facebook pages showing employees posing for group photos and socializing at work-related outings.

Prior to folding their operations behind WeCodeSolutions, Shahzad and others arrested this month operated as a web hosting group calling itself The Manipulaters. KrebsOnSecurity first wrote about The Manipulaters in May 2015, mainly because their ads at the time were blanketing a number of popular cybercrime forums, and because they were fairly open and brazen about what they were doing — even who they were in real life.

Sometime in 2019, The Manipulaters failed to renew their core domain name — manipulaters[.]com — the same one tied to so many of the company’s business operations. That domain was quickly scooped up by Scylla Intel, a cyber intelligence firm that specializes in connecting cybercriminals to their real-life identities. Soon after, Scylla started receiving large amounts of email correspondence intended for the group’s owners.

In 2024, DomainTools.com found the web-hosted version of Heartsender leaked an extraordinary amount of user information to unauthenticated users, including customer credentials and email records from Heartsender employees. DomainTools says the malware infections on Manipulaters PCs exposed “vast swaths of account-related data along with an outline of the group’s membership, operations, and position in the broader underground economy.”

Shahzad allegedly used the alias “Saim Raza,” an identity which has contacted KrebsOnSecurity multiple times over the past decade with demands to remove stories published about the group. The Saim Raza identity most recently contacted this author in November 2024, asserting they had quit the cybercrime industry and turned over a new leaf after a brush with the Pakistani police.

The arrested suspects include Rameez Shahzad, Muhammad Aslam (Rameez’s father), Atif Hussain, Muhammad Umar Irshad, Yasir Ali, Syed Saim Ali Shah, Muhammad Nowsherwan, Burhanul Haq, Adnan Munawar, Abdul Moiz, Hussnain Haider, Bilal Ahmad, Dilbar Hussain, Muhammad Adeel Akram, Awais Rasool, Usama Farooq, Usama Mehmood and Hamad Nawaz.

Pakistani Firm Shipped Fentanyl Analogs, Scams to US

A Texas firm recently charged with conspiring to distribute synthetic opioids in the United States is at the center of a vast network of companies in the U.S. and Pakistan whose employees are accused of using online ads to scam westerners seeking help with trademarks, book writing, mobile app development and logo designs, a new investigation reveals.

In an indictment (PDF) unsealed last month, the U.S. Department of Justice said Dallas-based eWorldTrade “operated an online business-to-business marketplace that facilitated the distribution of synthetic opioids such as isotonitazene and carfentanyl, both significantly more potent than fentanyl.”

Launched in 2017, eWorldTrade[.]com now features a seizure notice from the DOJ. eWorldTrade operated as a wholesale seller of consumer goods, including clothes, machinery, chemicals, automobiles and appliances. The DOJ’s indictment includes no additional details about eWorldTrade’s business, origins or other activity, and at first glance the website might appear to be a legitimate e-commerce platform that also just happened to sell some restricted chemicals.

However, an investigation into the company’s founders reveals they are connected to a sprawling network of websites that have a history of extortionate scams involving trademark registration, book publishing, exam preparation, and the design of logos, mobile applications and websites.

Records from the U.S. Patent and Trademark Office (USPTO) show the eWorldTrade mark is owned by an Azneem Bilwani in Karachi (this name also is in the registration records for the now-seized eWorldTrade domain). Mr. Bilwani is perhaps better known as the director of the Pakistan-based IT provider Abtach Ltd., which has been singled out by the USPTO and Google for operating trademark registration scams (the main offices for eWorldtrade and Abtach share the same address in Pakistan).

In November 2021, the USPTO accused Abtach of perpetrating “an egregious scheme to deceive and defraud applicants for federal trademark registrations by improperly altering official USPTO correspondence, overcharging application filing fees, misappropriating the USPTO’s trademarks, and impersonating the USPTO.”

Abtach offered trademark registration at suspiciously low prices compared to legitimate costs of over USD $1,500, and claimed they could register a trademark in 24 hours. Abtach reportedly rebranded to Intersys Limited after the USPTO banned Abtach from filing any more trademark applications.

FROM AXACT TO ABTACH

Many of Abtach’s employees are former associates of a similar company in Pakistan called Axact that was targeted by Pakistani authorities in a 2015 fraud investigation. Axact came under law enforcement scrutiny after The New York Times ran a front-page story about the company’s most lucrative scam business: Hundreds of sites peddling fake college degrees and diplomas.

People who purchased fake certifications were subsequently blackmailed by Axact employees posing as government officials, who would demand additional payments under threats of prosecution or imprisonment for having bought fraudulent “unauthorized” academic degrees. This practice created a continuous cycle of extortion, internally referred to as “upselling.”

“Axact took money from at least 215,000 people in 197 countries — one-third of them from the United States,” The Times reported. “Sales agents wielded threats and false promises and impersonated government officials, earning the company at least $89 million in its final year of operation.”

Dozens of top Axact employees were arrested, jailed, held for months, tried and sentenced to seven years for various fraud violations. But a 2019 research brief on Axact’s diploma mills found none of those convicted had started their prison sentence, and that several had fled Pakistan and never returned.

“In October 2016, a Pakistan district judge acquitted 24 Axact officials at trial due to ‘not enough evidence’ and then later admitted he had accepted a bribe (of $35,209) from Axact,” reads a history (PDF) published by the American Association of Collegiate Registrars and Admissions Officers.

In 2021, Pakistan’s Federal Investigation Agency (FIA) charged Bilwani and nearly four dozen others — many of them Abtach employees — with running an elaborate trademark scam. The authorities called it “the biggest money laundering case in the history of Pakistan,” and named a number of businesses based in Texas that allegedly helped move the proceeds of cybercrime.

The FIA said the defendants operated a large number of websites offering low-cost trademark services to customers, before then “ignoring them after getting the funds and later demanding more funds from clients/victims in the name of up-sale (extortion).” The Pakistani law enforcement agency said that about 75 percent of customers received fake or fabricated trademarks as a result of the scams.

The FIA found Abtach operates in conjunction with a Karachi firm called Digitonics Labs, which earned a monthly revenue of around $2.5 million through the “extortion of international clients in the name of up-selling, the sale of fake/fabricated USPTO certificates, and the maintaining of phishing websites.”

According the Pakistani authorities, the accused also ran countless scams involving ebook publication and logo creation, wherein customers are subjected to advance-fee fraud and extortion — with the scammers demanding more money for supposed “copyright release” and threatening to release the trademark.

Also charged by the FIA was Junaid Mansoor, the owner of Digitonics Labs in Karachi. Mansoor’s U.K.-registered company Maple Solutions Direct Limited has run at least 700 ads for logo design websites since 2015, the Google Ads Transparency page reports. The company has approximately 88 ads running on Google as of today. 

Mr. Mansoor is actively involved with and promoting a Quran study business called quranmasteronline[.]com, which was founded by Junaid’s brother Qasim Mansoor (Qasim is also named in the FIA criminal investigation). The Google ads promoting quranmasteronline[.]com were paid for by the same account advertising a number of scam websites selling logo and web design services. 

Junaid Mansoor did not respond to requests for comment. An address in Teaneck, New Jersey where Mr. Mansoor previously lived is listed as an official address of exporthub[.]com, a Pakistan-based e-commerce website that appears remarkably similar to eWorldTrade (Exporthub says its offices are in Texas). Interestingly, a search in Google for this domain shows ExportHub currently features multiple listings for fentanyl citrate from suppliers in China and elsewhere.

The CEO of Digitonics Labs is Muhammad Burhan Mirza, a former Axact official who was arrested by the FIA as part of its money laundering and trademark fraud investigation in 2021. In 2023, prosecutors in Pakistan charged Mirza, Mansoor and 14 other Digitonics employees with fraud, impersonating government officials, phishing, cheating and extortion. Mirza’s LinkedIn profile says he currently runs an educational technology/life coach enterprise called TheCoach360, which purports to help young kids “achieve financial independence.”

Reached via LinkedIn, Mr. Mirza denied having anything to do with eWorldTrade or any of its sister companies in Texas.

“Moreover, I have no knowledge as to the companies you have mentioned,” said Mr. Mirza, who did not respond to follow-up questions.

The current disposition of the FIA’s fraud case against the defendants is unclear. The investigation was marred early on by allegations of corruption and bribery. In 2021, Pakistani authorities alleged Bilwani paid a six-figure bribe to FIA investigators. Meanwhile, attorneys for Mr. Bilwani have argued that although their client did pay a bribe, the payment was solicited by government officials. Mr. Bilwani did not respond to requests for comment.

THE TEXAS NEXUS

KrebsOnSecurity has learned that the people and entities at the center of the FIA investigations have built a significant presence in the United States, with a strong concentration in Texas. The Texas businesses promote websites that sell logo and web design, ghostwriting, and academic cheating services. Many of these entities have recently been sued for fraud and breach of contract by angry former customers, who claimed the companies relentlessly upsold them while failing to produce the work as promised.

For example, the FIA complaints named Retrocube LLC and 360 Digital Marketing LLC, two entities that share a street address with eWorldTrade: 1910 Pacific Avenue, Suite 8025, Dallas, Texas. Also incorporated at that Pacific Avenue address is abtach[.]ae, a web design and marketing firm based in Dubai; and intersyslimited[.]com, the new name of Abtach after they were banned by the USPTO. Other businesses registered at this address market services for logo design, mobile app development, and ghostwriting.

360 Digital Marketing’s website 360digimarketing[.]com is owned by an Abtach front company called Abtech LTD. Meanwhile, business records show 360 Digi Marketing LTD is a U.K. company whose officers include former Abtach director Bilwani; Muhammad Saad Iqbal, formerly Abtach, now CEO of Intersys Ltd; Niaz Ahmed, a former Abtach associate; and Muhammad Salman Yousuf, formerly a vice president at Axact, Abtach, and Digitonics Labs.

Google’s Ads Transparency Center finds 360 Digital Marketing LLC ran at least 500 ads promoting various websites selling ghostwriting services . Another entity tied to Junaid Mansoor — a company called Octa Group Technologies AU — has run approximately 300 Google ads for book publishing services, promoting confusingly named websites like amazonlistinghub[.]com and barnesnoblepublishing[.]co.

Rameez Moiz is a Texas resident and former Abtach product manager who has represented 360 Digital Marketing LLC and RetroCube. Moiz told KrebsOnSecurity he stopped working for 360 Digital Marketing in the summer of 2023. Mr. Moiz did not respond to follow-up questions, but an Upwork profile for him states that as of April 2025 he is employed by Dallas-based Vertical Minds LLC.

In April 2025, California resident Melinda Will sued the Texas firm Majestic Ghostwriting — which is doing business as ghostwritingsquad[.]com —  alleging they scammed her out of $100,000 after she hired them to help write her book. Google’s ad transparency page shows Moiz’s employer Vertical Minds LLC paid to run approximately 55 ads for ghostwritingsquad[.]com and related sites.

VICTIMS SPEAK OUT

Ms. Will’s lawsuit is just one of more than two dozen complaints over the past four years wherein plaintiffs sued one of this group’s web design, wiki editing or ghostwriting services. In 2021, a New Jersey man sued Octagroup Technologies, alleging they ripped him off when he paid a total of more than $26,000 for the design and marketing of a web-based mapping service.

The plaintiff in that case did not respond to requests for comment, but his complaint alleges Octagroup and a myriad other companies it contracted with produced minimal work product despite subjecting him to relentless upselling. That case was decided in favor of the plaintiff because the defendants never contested the matter in court.

In 2023, 360 Digital Marketing LLC and Retrocube LLC were sued by a woman who said they scammed her out of $40,000 over a book she wanted help writing. That lawsuit helpfully showed an image of the office front door at 1910 Pacific Ave Suite 8025, which featured the logos of 360 Digital Marketing, Retrocube, and eWorldTrade.

The lawsuit was filed pro se by Leigh Riley, a 64-year-old career IT professional who paid 360 Digital Marketing to have a company called Talented Ghostwriter co-author and promote a series of books she’d outlined on spirituality and healing.

“The main reason I hired them was because I didn’t understand what I call the formula for writing a book, and I know there’s a lot of marketing that goes into publishing,” Riley explained in an interview. “I know nothing about that stuff, and these guys were convincing that they could handle all aspects of it. Until I discovered they couldn’t write a damn sentence in English properly.”

Riley’s well-documented lawsuit (not linked here because it features a great deal of personal information) includes screenshots of conversations with the ghostwriting team, which was constantly assigning her to new writers and editors, and ghosting her on scheduled conference calls about progress on the project. Riley said she ended up writing most of the book herself because the work they produced was unusable.

“Finally after months of promising the books were printed and on their way, they show up at my doorstep with the wrong title on the book,” Riley said. When she demanded her money back, she said the people helping her with the website to promote the book locked her out of the site.

Riley decided to sue, naming 360 Digital Marketing LLC and Retrocube LLC, among others.  The companies offered to settle the matter for $20,000, which she accepted. “I didn’t have money to hire a lawyer, and I figured it was time to cut my losses,” she said.

Riley said she could have saved herself a great deal of headache by doing some basic research on Talented Ghostwriter, whose website claims the company is based in Los Angeles. According to the California Secretary of State, however, there is no registered entity by that name. Rather, the address claimed by talentedghostwriter[.]com is a vacant office building with a “space available” sign in the window.

California resident Walter Horsting discovered something similar when he sued 360 Digital Marketing in small claims court last year, after hiring a company called Vox Ghostwriting to help write, edit and promote a spy novel he’d been working on. Horsting said he paid Vox $3,300 to ghostwrite a 280-page book, and was upsold an Amazon marketing and publishing package for $7,500.

In an interview, Horsting said the prose that Vox Ghostwriting produced was “juvenile at best,” forcing him to rewrite and edit the work himself, and to partner with a graphical artist to produce illustrations. Horsting said that when it came time to begin marketing the novel, Vox Ghostwriting tried to further upsell him on marketing packages, while dodging scheduled meetings with no follow-up.

“They have a money back guarantee, and when they wouldn’t refund my money I said I’m taking you to court,” Horsting recounted. “I tried to serve them in Los Angeles but found no such office exists. I talked to a salon next door and they said someone else had recently shown up desperately looking for where the ghostwriting company went, and it appears there are a trail of corpses on this. I finally tracked down where they are in Texas.”

It was the same office that Ms. Riley served her lawsuit against. Horsting said he has a court hearing scheduled later this month, but he’s under no illusions that winning the case means he’ll be able to collect.

“At this point, I’m doing it out of pride more than actually expecting anything to come to good fortune for me,” he said.

The following mind map was helpful in piecing together key events, individuals and connections mentioned above. It’s important to note that this graphic only scratches the surface of the operations tied to this group. For example, in Case 2 we can see mention of academic cheating services, wherein people can be hired to take online proctored exams on one’s behalf. Those who hire these services soon find themselves subject to impersonation and blackmail attempts for larger and larger sums of money, with the threat of publicly exposing their unethical academic cheating activity.

GOOGLE RESPONDS

KrebsOnSecurity reviewed the Google Ad Transparency links for nearly 500 different websites tied to this network of ghostwriting, logo, app and web development businesses. Those website names were then fed into spyfu.com, a competitive intelligence company that tracks the reach and performance of advertising keywords. Spyfu estimates that between April 2023 and April 2025, those websites spent more than $10 million on Google ads.

Reached for comment, Google said in a written statement that it is constantly policing its ad network for bad actors, pointing to an ads safety report (PDF) showing Google blocked or removed 5.1 billion bad ads last year — including more than 500 million ads related to trademarks.

“Our policy against Enabling Dishonest Behavior prohibits products or services that help users mislead others, including ads for paper-writing or exam-taking services,” the statement reads. “When we identify ads or advertisers that violate our policies, we take action, including by suspending advertiser accounts, disapproving ads, and restricting ads to specific domains when appropriate.”

Google did not respond to specific questions about the advertising entities mentioned in this story, saying only that “we are actively investigating this matter and addressing any policy violations, including suspending advertiser accounts when appropriate.”

From reviewing the ad accounts that have been promoting these scam websites, it appears Google has very recently acted to remove a large number of the offending ads. Prior to my notifying Google about the extent of this ad network on April 28, the Google Ad Transparency network listed over 500 ads for 360 Digital Marketing; as of this publication, that number had dwindled to 10.

On April 30, Google announced that starting this month its ads transparency page will display the payment profile name as the payer name for verified advertisers, if that name differs from their verified advertiser name. Searchengineland.com writes the changes are aimed at increasing accountability in digital advertising.

This spreadsheet lists the domain names, advertiser names, and Google Ad Transparency links for more than 350 entities offering ghostwriting, publishing, web design and academic cheating services.

KrebsOnSecurity would like to thank the anonymous security researcher NatInfoSec for their assistance in this investigation.

For further reading on Abtach and its myriad companies in all of the above-mentioned verticals (ghostwriting, logo design, etc.), see this Wikiwand entry.

New 0-Day Attacks Linked to China’s ‘Volt Typhoon’

Malicious hackers are exploiting a zero-day vulnerability in Versa Director, a software product used by many Internet and IT service providers. Researchers believe the activity is linked to Volt Typhoon, a Chinese cyber espionage group focused on infiltrating critical U.S. networks and laying the groundwork for the ability to disrupt communications between the United States and Asia during any future armed conflict with China.

Versa Director systems are primarily used by Internet service providers (ISPs), as well as managed service providers (MSPs) that cater to the IT needs of many small to mid-sized businesses simultaneously. In a security advisory published Aug. 26, Versa urged customers to deploy a patch for the vulnerability (CVE-2024-39717), which the company said is fixed in Versa Director 22.1.4 or later.

Versa said the weakness allows attackers to upload a file of their choosing to vulnerable systems. The advisory placed much of the blame on Versa customers who “failed to implement system hardening and firewall guidelines…leaving a management port exposed on the internet that provided the threat actors with initial access.”

Versa’s advisory doesn’t say how it learned of the zero-day flaw, but its vulnerability listing at mitre.org acknowledges “there are reports of others based on backbone telemetry observations of a 3rd party provider, however these are unconfirmed to date.”

Those third-party reports came in late June 2024 from Michael Horka, senior lead information security engineer at Black Lotus Labs, the security research arm of Lumen Technologies, which operates one of the global Internet’s largest backbones.

In an interview with KrebsOnSecurity, Horka said Black Lotus Labs identified a web-based backdoor on Versa Director systems belonging to four U.S. victims and one non-U.S. victim in the ISP and MSP sectors, with the earliest known exploit activity occurring at a U.S. ISP on June 12, 2024.

“This makes Versa Director a lucrative target for advanced persistent threat (APT) actors who would want to view or control network infrastructure at scale, or pivot into additional (or downstream) networks of interest,” Horka wrote in a blog post published today.

Black Lotus Labs said it assessed with “medium” confidence that Volt Typhoon was responsible for the compromises, noting the intrusions bear the hallmarks of the Chinese state-sponsored espionage group — including zero-day attacks targeting IT infrastructure providers, and Java-based backdoors that run in memory only.

In May 2023, the National Security Agency (NSA), the Federal Bureau of Investigation (FBI), and the Cybersecurity Infrastructure Security Agency (CISA) issued a joint warning (PDF) about Volt Typhoon, also known as “Bronze Silhouette” and “Insidious Taurus,” which described how the group uses small office/home office (SOHO) network devices to hide their activity.

In early December 2023, Black Lotus Labs published its findings on “KV-botnet,” thousands of compromised SOHO routers that were chained together to form a covert data transfer network supporting various Chinese state-sponsored hacking groups, including Volt Typhoon.

In January 2024, the U.S. Department of Justice disclosed the FBI had executed a court-authorized takedown of the KV-botnet shortly before Black Lotus Labs released its December report.

In February 2024, CISA again joined the FBI and NSA in warning Volt Typhoon had compromised the IT environments of multiple critical infrastructure organizations — primarily in communications, energy, transportation systems, and water and wastewater sectors — in the continental and non-continental United States and its territories, including Guam.

“Volt Typhoon’s choice of targets and pattern of behavior is not consistent with traditional cyber espionage or intelligence gathering operations, and the U.S. authoring agencies assess with high confidence that Volt Typhoon actors are pre-positioning themselves on IT networks to enable lateral movement to OT [operational technology] assets to disrupt functions,” that alert warned.

In a speech at Vanderbilt University in April, FBI Director Christopher Wray said China is developing the “ability to physically wreak havoc on our critical infrastructure at a time of its choosing,” and that China’s plan is to “land blows against civilian infrastructure to try to induce panic.”

Ryan English, an information security engineer at Lumen, said it’s disappointing his employer didn’t at least garner an honorable mention in Versa’s security advisory. But he said he’s glad there are now a lot fewer Versa systems exposed to this attack.

“Lumen has for the last nine weeks been very intimate with their leadership with the goal in mind of helping them mitigate this,” English said. “We’ve given them everything we could along the way, so it kind of sucks being referenced just as a third party.”

U.S. Hacks QakBot, Quietly Removes Botnet Infections

The U.S. government today announced a coordinated crackdown against QakBot, a complex malware family used by multiple cybercrime groups to lay the groundwork for ransomware infections. The international law enforcement operation involved seizing control over the botnet’s online infrastructure, and quietly removing the Qakbot malware from tens of thousands of infected Microsoft Windows computers.

In an international operation announced today dubbed “Duck Hunt,” the U.S. Department of Justice (DOJ) and Federal Bureau of Investigation (FBI) said they obtained court orders to remove Qakbot from infected devices, and to seize servers used to control the botnet.

“This is the most significant technological and financial operation ever led by the Department of Justice against a botnet,” said Martin Estrada, the U.S. attorney for the Southern District of California, at a press conference this morning in Los Angeles.

Estrada said Qakbot has been implicated in 40 different ransomware attacks over the past 18 months, intrusions that collectively cost victims more than $58 million in losses.

Emerging in 2007 as a banking trojan, QakBot (a.k.a. Qbot and Pinkslipbot) has morphed into an advanced malware strain now used by multiple cybercriminal groups to prepare newly compromised networks for ransomware infestations. QakBot is most commonly delivered via email phishing lures disguised as something legitimate and time-sensitive, such as invoices or work orders.

Don Alway, assistant director in charge of the FBI’s Los Angeles field office, said federal investigators gained access to an online panel that allowed cybercrooks to monitor and control the actions of the botnet. From there, investigators obtained court-ordered approval to instruct all infected systems to uninstall Qakbot and to disconnect themselves from the botnet, Alway said.

The DOJ says their access to the botnet’s control panel revealed that Qakbot had been used to infect more than 700,000 machines in the past year alone, including 200,000 systems in the United States.

Working with law enforcement partners in France, Germany, Latvia, the Netherlands, Romania and the United Kingdom, the DOJ said it was able to seize more than 50 Internet servers tied to the malware network, and nearly $9 million in ill-gotten cryptocurrency from QakBot’s cybercriminal overlords. The DOJ declined to say whether any suspects were questioned or arrested in connection with Qakbot, citing an ongoing investigation.

According to recent figures from the managed security firm Reliaquest, QakBot is by far the most prevalent malware “loader” — malicious software used to secure access to a hacked network and help drop additional malware payloads. Reliaquest says QakBot infections accounted for nearly one-third of all loaders observed in the wild during the first six months of this year.

Researchers at AT&T Alien Labs say the crooks responsible for maintaining the QakBot botnet have rented their creation to various cybercrime groups over the years. More recently, however, QakBot has been closely associated with ransomware attacks from Black Basta, a prolific Russian-language criminal group that was thought to have spun off from the Conti ransomware gang in early 2022.

Today’s operation is not the first time the U.S. government has used court orders to remotely disinfect systems compromised with malware. In May 2023, the DOJ quietly removed malware from computers around the world infected by the “Snake” malware, an even older malware family that has been tied to Russian intelligence agencies.

Documents published by the DOJ in support of today’s takedown state that beginning on Aug. 25, 2023, law enforcement gained access to the Qakbot botnet, redirected botnet traffic to and through servers controlled by law enforcement, and instructed Qakbot-infected computers to download a Qakbot Uninstall file that uninstalled Qakbot malware from the infected computer.

“The Qakbot Uninstall file did not remediate other malware that was already installed on infected computers,” the government explained. “Instead, it was designed to prevent additional Qakbot malware from being installed on the infected computer by untethering the victim computer from the Qakbot botnet.”

The DOJ said it also recovered more than 6.5 million stolen passwords and other credentials, and that it has shared this information with two websites that let users check to see if their credentials were exposed: Have I Been Pwned, and a “Check Your Hack” website erected by the Dutch National Police.

Further reading:

–The DOJ’s application for a search warrant application tied to Qakbot uninstall file (PDF)
–The search warrant application connected to QakBot server infrastructure in the United States (PDF)
–The government’s application for a warrant to seize virtual currency from the QakBot operators (PDF)
–A technical breakdown from SecureWorks