⚡ Weekly Recap: WhatsApp Worm, Critical CVEs, Oracle 0-Day, Ransomware Cartel & More

Every week, the cyber world reminds us that silence doesn’t mean safety. Attacks often begin quietly — one unpatched flaw, one overlooked credential, one backup left unencrypted. By the time alarms sound, the damage is done. This week’s edition looks at how attackers are changing the game — linking different flaws, working together across borders, and even turning trusted tools into weapons.

Researchers Warn RondoDox Botnet is Weaponizing Over 50 Flaws Across 30+ Vendors

Malware campaigns distributing the RondoDox botnet have expanded their targeting focus to exploit more than 50 vulnerabilities across over 30 vendors. The activity, described as akin to an "exploit shotgun" approach, has singled out a wide range of internet-exposed infrastructure, including routers, digital video recorders (DVRs), network video recorders (NVRs), CCTV systems, web servers, and

Microsoft Locks Down IE Mode After Hackers Turned Legacy Feature Into Backdoor

Microsoft said it has revamped the Internet Explorer (IE) mode in its Edge browser after receiving "credible reports" in August 2025 that unknown threat actors were abusing the backward compatibility feature to gain unauthorized access to users' devices. "Threat actors were leveraging basic social engineering techniques alongside unpatched (0-day) exploits in Internet Explorer's JavaScript

Astaroth Banking Trojan Abuses GitHub to Remain Operational After Takedowns

Cybersecurity researchers are calling attention to a new campaign that delivers the Astaroth banking trojan that employs GitHub as a backbone for its operations to stay resilient in the face of infrastructure takedowns. "Instead of relying solely on traditional command-and-control (C2) servers that can be taken down, these attackers are leveraging GitHub repositories to host malware

New Rust-Based Malware "ChaosBot" Uses Discord Channels to Control Victims' PCs

Cybersecurity researchers have disclosed details of a new Rust-based backdoor called ChaosBot that can allow operators to conduct reconnaissance and execute arbitrary commands on compromised hosts. "Threat actors leveraged compromised credentials that mapped to both Cisco VPN and an over-privileged Active Directory account named, 'serviceaccount,'" eSentire said in a technical report published

New Oracle E-Business Suite Bug Could Let Hackers Access Data Without Login

Oracle on Saturday issued a security alert warning of a fresh security flaw impacting its E-Business Suite that it said could allow unauthorized access to sensitive data. The vulnerability, tracked as CVE-2025-61884, carries a CVSS score of 7.5, indicating high severity. It affects versions from 12.2.3 through 12.2.14. "Easily exploitable vulnerability allows an unauthenticated attacker with

Experts Warn of Widespread SonicWall VPN Compromise Impacting Over 100 Accounts

Cybersecurity company Huntress on Friday warned of "widespread compromise" of SonicWall SSL VPN devices to access multiple customer environments. "Threat actors are authenticating into multiple accounts rapidly across compromised devices," it said. "The speed and scale of these attacks imply that the attackers appear to control valid credentials rather than brute-forcing." A significant chunk of

Hackers Turn Velociraptor DFIR Tool Into Weapon in LockBit Ransomware Attacks

Threat actors are abusing Velociraptor, an open-source digital forensics and incident response (DFIR) tool, in connection with ransomware attacks likely orchestrated by Storm-2603 (aka CL-CRI-1040 or Gold Salem), which is known for deploying the Warlock and LockBit ransomware. The threat actor's use of the security utility was documented by Sophos last month. It's assessed that the attackers

Stealit Malware Abuses Node.js Single Executable Feature via Game and VPN Installers

Cybersecurity researchers have disclosed details of an active malware campaign called Stealit that has leveraged Node.js' Single Executable Application (SEA) feature as a way to distribute its payloads. According to Fortinet FortiGuard Labs, select iterations have also employed the open-source Electron framework to deliver the malware. It's assessed that the malware is being propagated through

Microsoft Warns of ‘Payroll Pirates’ Hijacking HR SaaS Accounts to Steal Employee Salaries

A threat actor known as Storm-2657 has been observed hijacking employee accounts with the end goal of diverting salary payments to attacker-controlled accounts. "Storm-2657 is actively targeting a range of U.S.-based organizations, particularly employees in sectors like higher education, to gain access to third-party human resources (HR) software as a service (SaaS) platforms like Workday," the

From Detection to Patch: Fortra Reveals Full Timeline of CVE-2025-10035 Exploitation

Fortra on Thursday revealed the results of its investigation into CVE-2025-10035, a critical security flaw in GoAnywhere Managed File Transfer (MFT) that's assessed to have come under active exploitation since at least September 11, 2025. The company said it began its investigation on September 11 following a "potential vulnerability" reported by a customer, uncovering "potentially suspicious

175 Malicious npm Packages with 26,000 Downloads Used in Credential Phishing Campaign

Cybersecurity researchers have flagged a new set of 175 malicious packages on the npm registry that have been used to facilitate credential harvesting attacks as part of an unusual campaign. The packages have been collectively downloaded 26,000 times, acting as an infrastructure for a widespread phishing campaign codenamed Beamglea targeting more than 135 industrial, technology, and energy

From LFI to RCE: Active Exploitation Detected in Gladinet and TrioFox Vulnerability

Cybersecurity company Huntress said it has observed active in-the-wild exploitation of an unpatched security flaw impacting Gladinet CentreStack and TrioFox products. The zero-day vulnerability, tracked as CVE-2025-11371 (CVSS score: 6.1), is an unauthenticated local file inclusion bug that allows unintended disclosure of system files. It impacts all versions of the software prior to and

CL0P-Linked Hackers Breach Dozens of Organizations Through Oracle Software Flaw

Dozens of organizations may have been impacted following the zero-day exploitation of a security flaw in Oracle's E-Business Suite (EBS) software since August 9, 2025, Google Threat Intelligence Group (GTIG) and Mandiant said in a new report released Thursday. "We're still assessing the scope of this incident, but we believe it affected dozens of organizations," John Hultquist, chief analyst of

From HealthKick to GOVERSHELL: The Evolution of UTA0388's Espionage Malware

A China-aligned threat actor codenamed UTA0388 has been attributed to a series of spear-phishing campaigns targeting North America, Asia, and Europe that are designed to deliver a Go-based implant known as GOVERSHELL. "The initially observed campaigns were tailored to the targets, and the messages purported to be sent by senior researchers and analysts from legitimate-sounding, completely

New ClayRat Spyware Targets Android Users via Fake WhatsApp and TikTok Apps

A rapidly evolving Android spyware campaign called ClayRat has targeted users in Russia using a mix of Telegram channels and lookalike phishing websites by impersonating popular apps like WhatsApp, Google Photos, TikTok, and YouTube as lures to install them. "Once active, the spyware can exfiltrate SMS messages, call logs, notifications, and device information; taking photos with the front

Hackers Access SonicWall Cloud Firewall Backups, Spark Urgent Security Checks

SonicWall on Wednesday disclosed that an unauthorized party accessed firewall configuration backup files for all customers who have used the cloud backup service. "The files contain encrypted credentials and configuration data; while encryption remains in place, possession of these files could increase the risk of targeted attacks," the company said. It also noted that it's working to notify all

ThreatsDay Bulletin: MS Teams Hack, MFA Hijacking, $2B Crypto Heist, Apple Siri Probe & More

Cyber threats are evolving faster than ever. Attackers now combine social engineering, AI-driven manipulation, and cloud exploitation to breach targets once considered secure. From communication platforms to connected devices, every system that enhances convenience also expands the attack surface. This edition of ThreatsDay Bulletin explores these converging risks and the safeguards that help

SaaS Breaches Start with Tokens - What Security Teams Must Watch

Token theft is a leading cause of SaaS breaches. Discover why OAuth and API tokens are often overlooked and how security teams can strengthen token hygiene to prevent attacks. Most companies in 2025 rely on a whole range of software-as-a-service (SaaS) applications to run their operations. However, the security of these applications depends on small pieces of data called tokens. Tokens, like

From Phishing to Malware: AI Becomes Russia's New Cyber Weapon in War on Ukraine

Russian hackers' adoption of artificial intelligence (AI) in cyber attacks against Ukraine has reached a new level in the first half of 2025 (H1 2025), the country's State Service for Special Communications and Information Protection (SSSCIP) said. "Hackers now employ it not only to generate phishing messages, but some of the malware samples we have analyzed show clear signs of being generated

Critical Exploit Lets Hackers Bypass Authentication in WordPress Service Finder Theme

Threat actors are actively exploiting a critical security flaw impacting the Service Finder WordPress theme that makes it possible to gain unauthorized access to any account, including administrators, and take control of susceptible sites. The authentication bypass vulnerability, tracked as CVE-2025-5947 (CVSS score: 9.8), affects the Service Finder Bookings, a WordPress plugin bundled with the

Hackers Exploit WordPress Sites to Power Next-Gen ClickFix Phishing Attacks

Cybersecurity researchers are calling attention to a nefarious campaign targeting WordPress sites to make malicious JavaScript injections that are designed to redirect users to sketchy sites. "Site visitors get injected content that was drive-by malware like fake Cloudflare verification," Sucuri researcher Puja Srivastava said in an analysis published last week. The website security company

Chinese Hackers Weaponize Open-Source Nezha Tool in New Attack Wave

Threat actors with suspected ties to China have turned a legitimate open-source monitoring tool called Nezha into an attack weapon, using it to deliver a known malware called Gh0st RAT to targets. The activity, observed by cybersecurity company Huntress in August 2025, is characterized by the use of an unusual technique called log poisoning (aka log injection) to plant a web shell on a web

LockBit, Qilin, and DragonForce Join Forces to Dominate the Ransomware Ecosystem

Three prominent ransomware groups DragonForce, LockBit, and Qilin have announced a new strategic ransomware alliance, once underscoring continued shifts in the cyber threat landscape. The coalition is seen as an attempt on the part of the financially motivated threat actors to conduct more effective ransomware attacks, ReliaQuest said in a report shared with The Hacker News. "Announced shortly

Severe Framelink Figma MCP Vulnerability Lets Hackers Execute Code Remotely

Cybersecurity researchers have disclosed details of a now-patched vulnerability in the popular figma-developer-mcp Model Context Protocol (MCP) server that could allow attackers to achieve code execution. The vulnerability, tracked as CVE-2025-53967 (CVSS score: 7.5), is a command injection bug stemming from the unsanitized use of user input, opening the door to a scenario where an attacker can

OpenAI Disrupts Russian, North Korean, and Chinese Hackers Misusing ChatGPT for Cyberattacks

OpenAI on Tuesday said it disrupted three activity clusters for misusing its ChatGPT artificial intelligence (AI) tool to facilitate malware development. This includes a Russian‑language threat actor, who is said to have used the chatbot to help develop and refine a remote access trojan (RAT), a credential stealer with an aim to evade detection. The operator also used several ChatGPT accounts to

BatShadow Group Uses New Go-Based 'Vampire Bot' Malware to Hunt Job Seekers

A Vietnamese threat actor named BatShadow has been attributed to a new campaign that leverages social engineering tactics to deceive job seekers and digital marketing professionals to deliver a previously undocumented malware called Vampire Bot. "The attackers pose as recruiters, distributing malicious files disguised as job descriptions and corporate documents," Aryaka Threat Research Labs

Google's New AI Doesn't Just Find Vulnerabilities — It Rewrites Code to Patch Them

Google's DeepMind division on Monday announced an artificial intelligence (AI)-powered agent called CodeMender that automatically detects, patches, and rewrites vulnerable code to prevent future exploits. The efforts add to the company's ongoing efforts to improve AI-powered vulnerability discovery, such as Big Sleep and OSS-Fuzz. DeepMind said the AI agent is designed to be both reactive and

XWorm 6.0 Returns with 35+ Plugins and Enhanced Data Theft Capabilities

Cybersecurity researchers have charted the evolution of XWorm malware, turning it into a versatile tool for supporting a wide range of malicious actions on compromised hosts. "XWorm's modular design is built around a core client and an array of specialized components known as plugins," Trellix researchers Niranjan Hegde and Sijo Jacob said in an analysis published last week. "These plugins are

13-Year-Old Redis Flaw Exposed: CVSS 10.0 Vulnerability Lets Attackers Run Code Remotely

Redis has disclosed details of a maximum-severity security flaw in its in-memory database software that could result in remote code execution under certain circumstances. The vulnerability, tracked as CVE-2025-49844 (aka RediShell), has been assigned a CVSS score of 10.0. "An authenticated user may use a specially crafted Lua script to manipulate the garbage collector, trigger a use-after-free,

Microsoft Links Storm-1175 to GoAnywhere Exploit Deploying Medusa Ransomware

Microsoft on Monday attributed a threat actor it tracks as Storm-1175 to the exploitation of a critical security flaw in Fortra GoAnywhere software to facilitate the deployment of Medusa ransomware. The vulnerability is CVE-2025-10035 (CVSS score: 10.0), a critical deserialization bug that could result in command injection without authentication. It was addressed in version 7.8.4, or the Sustain

Oracle EBS Under Fire as Cl0p Exploits CVE-2025-61882 in Real-World Attacks

CrowdStrike on Monday said it's attributing the exploitation of a recently disclosed security flaw in Oracle E-Business Suite with moderate confidence to a threat actor it tracks as Graceful Spider (aka Cl0p), and that the first known exploitation occurred on August 9, 2025. The malicious activity involves the exploitation of CVE-2025-61882 (CVSS score: 9.8), a critical vulnerability that

New Report Links Research Firms BIETA and CIII to China’s MSS Cyber Operations

A Chinese company named the Beijing Institute of Electronics Technology and Application (BIETA) has been assessed to be likely led by the Ministry of State Security (MSS). The assessment comes from evidence that at least four BIETA personnel have clear or possible links to MSS officers and their relationship with the University of International Relations, which is known to share links with the

5 Critical Questions For Adopting an AI Security Solution

In the era of rapidly advancing artificial intelligence (AI) and cloud technologies, organizations are increasingly implementing security measures to protect sensitive data and ensure regulatory compliance. Among these measures, AI-SPM (AI Security Posture Management) solutions have gained traction to secure AI pipelines, sensitive data assets, and the overall AI ecosystem. These solutions help

⚡ Weekly Recap: Oracle 0-Day, BitLocker Bypass, VMScape, WhatsApp Worm & More

The cyber world never hits pause, and staying alert matters more than ever. Every week brings new tricks, smarter attacks, and fresh lessons from the field. This recap cuts through the noise to share what really matters—key trends, warning signs, and stories shaping today’s security landscape. Whether you’re defending systems or just keeping up, these highlights help you spot what’s coming

Chinese Cybercrime Group Runs Global SEO Fraud Ring Using Compromised IIS Servers

Cybersecurity researchers have shed light on a Chinese-speaking cybercrime group codenamed UAT-8099 that has been attributed to search engine optimization (SEO) fraud and theft of high-value credentials, configuration files, and certificate data.  The attacks are designed to target Microsoft Internet Information Services (IIS) servers, with most of the infections reported in India, Thailand

Zimbra Zero-Day Exploited to Target Brazilian Military via Malicious ICS Files

A now patched security vulnerability in Zimbra Collaboration was exploited as a zero-day earlier this year in cyber attacks targeting the Brazilian military. Tracked as CVE-2025-27915 (CVSS score: 5.4), the vulnerability is a stored cross-site scripting (XSS) vulnerability in the Classic Web Client that arises as a result of insufficient sanitization of HTML content in ICS calendar files,

Oracle Rushes Patch for CVE-2025-61882 After Cl0p Exploited It in Data Theft Attacks

Oracle has released an emergency update to address a critical security flaw in its E-Business Suite software that it said has been exploited in the recent wave of Cl0p data theft attacks. The vulnerability, tracked as CVE-2025-61882 (CVSS score: 9.8), concerns an unspecified bug that could allow an unauthenticated attacker with network access via HTTP to compromise and take control of the Oracle

CometJacking: One Click Can Turn Perplexity’s Comet AI Browser Into a Data Thief

Cybersecurity researchers have disclosed details of a new attack called CometJacking targeting Perplexity's agentic AI browser Comet by embedding malicious prompts within a seemingly innocuous link to siphon sensitive data, including from connected services, like email and calendar. The sneaky prompt injection attack plays out in the form of a malicious link that, when clicked, triggers the

Scanning Activity on Palo Alto Networks Portals Jump 500% in One Day

Threat intelligence firm GreyNoise disclosed on Friday that it has observed a massive spike in scanning activity targeting Palo Alto Networks login portals. The company said it observed a nearly 500% increase in IP addresses scanning Palo Alto Networks login portals on October 3, 2025, the highest level recorded in the last three months. It described the traffic as targeted and structured, and

Detour Dog Caught Running DNS-Powered Malware Factory for Strela Stealer

A threat actor named Detour Dog has been outed as powering campaigns distributing an information stealer known as Strela Stealer. That's according to findings from Infoblox, which found the threat actor to maintain control of domains hosting the first stage of the stealer, a backdoor called StarFish. The DNS threat intelligence firm said it has been tracking Detour Dog since August 2023, when

Rhadamanthys Stealer Evolves: Adds Device Fingerprinting, PNG Steganography Payloads

The threat actor behind Rhadamanthys has also advertised two other tools called Elysium Proxy Bot and Crypt Service on their website, even as the flagship information stealer has been updated to support the ability to collect device and web browser fingerprints, among others. "Rhadamanthys was initially promoted through posts on cybercrime forums, but soon it became clear that the author had a

Researchers Warn of Self-Spreading WhatsApp Malware Named SORVEPOTEL

Brazilian users have emerged as the target of a new self-propagating malware dubbed SORVEPOTEL that spreads via the popular messaging app WhatsApp. The campaign, codenamed Water Saci by Trend Micro, weaponizes the trust with the platform to extend its reach across Windows systems, adding the attack is "engineered for speed and propagation" rather than data theft or ransomware. "SORVEPOTEL has

Product Walkthrough: How Passwork 7 Addresses Complexity of Enterprise Security

Passwork is positioned as an on-premises unified platform for both password and secrets management, aiming to address the increasing complexity of credential storage and sharing in modern organizations. The platform recently received a major update that reworks all the core mechanics. Passwork 7 introduces significant changes to how credentials are organized, accessed, and managed, reflecting

New "Cavalry Werewolf" Attack Hits Russian Agencies with FoalShell and StallionRAT

A threat actor that's known to share overlaps with a hacking group called YoroTrooper has been observed targeting the Russian public sector with malware families such as FoalShell and StallionRAT. Cybersecurity vendor BI.ZONE is tracking the activity under the moniker Cavalry Werewolf. It's also assessed to have commonalities with clusters tracked as SturgeonPhisher, Silent Lynx, Comrade Saiga,

CISA Flags Meteobridge CVE-2025-4008 Flaw as Actively Exploited in the Wild

The U.S. Cybersecurity and Infrastructure Security Agency (CISA) on Thursday added a high-severity security flaw impacting Smartbedded Meteobridge to its Known Exploited Vulnerabilities (KEV) catalog, citing evidence of active exploitation. The vulnerability, CVE-2025-4008 (CVSS score: 8.7), is a case of command injection in the Meteobridge web interface that could result in code execution. "

Confucius Hackers Hit Pakistan With New WooperStealer and Anondoor Malware

The threat actor known as Confucius has been attributed to a new phishing campaign that has targeted Pakistan with malware families like WooperStealer and Anondoor. "Over the past decade, Confucius has repeatedly targeted government agencies, military organizations, defense contractors, and critical industries -- especially in Pakistan – using spear-phishing and malicious documents as initial

Alert: Malicious PyPI Package soopsocks Infects 2,653 Systems Before Takedown

Cybersecurity researchers have flagged a malicious package on the Python Package Index (PyPI) repository that claims to offer the ability to create a SOCKS5 proxy service, while also providing a stealthy backdoor-like functionality to drop additional payloads on Windows systems. The deceptive package, named soopsocks, attracted a total of 2,653 downloads before it was taken down. It was first

ThreatsDay Bulletin: CarPlay Exploit, BYOVD Tactics, SQL C2 Attacks, iCloud Backdoor Demand & More

From unpatched cars to hijacked clouds, this week’s Threatsday headlines remind us of one thing — no corner of technology is safe. Attackers are scanning firewalls for critical flaws, bending vulnerable SQL servers into powerful command centers, and even finding ways to poison Chrome’s settings to sneak in malicious extensions. On the defense side, AI is stepping up to block ransomware in real

Google Mandiant Probes New Oracle Extortion Wave Possibly Linked to Cl0p Ransomware

Google Mandiant and Google Threat Intelligence Group (GTIG) have disclosed that they are tracking a new cluster of activity possibly linked to a financially motivated threat actor known as Cl0p. The malicious activity involves sending extortion emails to executives at various organizations and claiming to have stolen sensitive data from their Oracle E-Business Suite. "This activity began on or

Warning: Beware of Android Spyware Disguised as Signal Encryption Plugin and ToTok Pro

Cybersecurity researchers have discovered two Android spyware campaigns dubbed ProSpy and ToSpy that impersonate apps like Signal and ToTok to target users in the United Arab Emirates (U.A.E.). Slovak cybersecurity company ESET said the malicious apps are distributed via fake websites and social engineering to trick unsuspecting users into downloading them. Once installed, both the spyware

New WireTap Attack Extracts Intel SGX ECDSA Key via DDR4 Memory-Bus Interposer

In yet another piece of research, academics from Georgia Institute of Technology and Purdue University have demonstrated that the security guarantees offered by Intel's Software Guard eXtensions (SGX) can be bypassed on DDR4 systems to passively decrypt sensitive data. SGX is designed as a hardware feature in Intel server processors that allows applications to be run in a Trusted Execution

OneLogin Bug Let Attackers Use API Keys to Steal OIDC Secrets and Impersonate Apps

A high-severity security flaw has been disclosed in the One Identity OneLogin Identity and Access Management (IAM) solution that, if successfully exploited, could expose sensitive OpenID Connect (OIDC) application client secrets under certain circumstances. The vulnerability, tracked as CVE-2025-59363, has been assigned a CVSS score of 7.7 out of 10.0. It has been described as a case of

Red Hat OpenShift AI Flaw Exposes Hybrid Cloud Infrastructure to Full Takeover

A severe security flaw has been disclosed in the Red Hat OpenShift AI service that could allow attackers to escalate privileges and take control of the complete infrastructure under certain conditions. OpenShift AI is a platform for managing the lifecycle of predictive and generative artificial intelligence (GenAI) models at scale and across hybrid cloud environments. It also facilitates data

Hackers Exploit Milesight Routers to Send Phishing SMS to European Users

Unknown threat actors are abusing Milesight industrial cellular routers to send SMS messages as part of a smishing campaign targeting users in European countries since at least February 2022. French cybersecurity company SEKOIA said the attackers are exploiting the cellular router's API to send malicious SMS messages containing phishing URLs, with the campaigns primarily targeting Sweden, Italy,

New Android Banking Trojan “Klopatra” Uses Hidden VNC to Control Infected Smartphones

A previously undocumented Android banking trojan called Klopatra has compromised over 3,000 devices, with a majority of the infections reported in Spain and Italy. Italian fraud prevention firm Cleafy, which discovered the sophisticated malware and remote access trojan (RAT) in late August 2025, said it leverages Hidden Virtual Network Computing (VNC) for remote control of infected devices and

Ukraine Warns of CABINETRAT Backdoor + XLL Add-ins Spread via Signal ZIPs

The Computer Emergency Response Team of Ukraine (CERT-UA) has warned of new targeted cyber attacks in the country using a backdoor called CABINETRAT. The activity, observed in September 2025, has been attributed to a threat cluster it tracks as UAC-0245. The agency said it spotted the attack following the discovery of software tools taking the form of XLL files, which refer to Microsoft Excel

New $50 Battering RAM Attack Breaks Intel and AMD Cloud Security Protections

A group of academics from KU Leuven and the University of Birmingham has demonstrated a new vulnerability called Battering RAM to bypass the latest defenses on Intel and AMD cloud processors. "We built a simple, $50 interposer that sits quietly in the memory path, behaving transparently during startup and passing all trust checks," researchers Jesse De Meulemeester, David Oswald, Ingrid

Phantom Taurus: New China-Linked Hacker Group Hits Governments With Stealth Malware

Government and telecommunications organizations across Africa, the Middle East, and Asia have emerged as the target of a previously undocumented China-aligned nation-state actor dubbed Phantom Taurus over the past two-and-a-half years. "Phantom Taurus' main focus areas include ministries of foreign affairs, embassies, geopolitical events, and military operations," Palo Alto Networks Unit 42

Researchers Disclose Google Gemini AI Flaws Allowing Prompt Injection and Cloud Exploits

Cybersecurity researchers have disclosed three now-patched security vulnerabilities impacting Google's Gemini artificial intelligence (AI) assistant that, if successfully exploited, could have exposed users to major privacy risks and data theft. "They made Gemini vulnerable to search-injection attacks on its Search Personalization Model; log-to-prompt injection attacks against Gemini Cloud