Evil Fonts deceive a viewer by rendering a different letter than is actually on the disk. Evil Fonts can poison HTML, DOCX, PDFs, and anywhere else you can bring your own fonts. Works great in Windows corporate networks for bypassing security tooling, initial access through JavaScript free click fix (beats mitm web security tooling), and leaving traps around the network to harvest shells.

Imagine thinking you are copying whoami but what is actually on the disk is rm -rf \~

Demos:

(Use desktop)

https://doctoreww.github.io/EvilFontTool/

For the demos, copy and paste the HTML/DOCX to a notepad to remove the evil fonts. For the AI ones imagine your security tooling inspects the benign text on disk, but shows the obviously malicious extortion to the user.

Labs:

https://github.com/DoctorEww/EvilFontTool/blob/main/labs%2FREADME.md

Lab Walkthrough:

https://github.com/DoctorEww/EvilFontTool/blob/main/labs%2Fwalkthrough.md

Some evil font uses:

Tamper homework to make it so students poison AI queries

Poison help desk documentation

Bypass email filters

Clickfix

Beat resume AI filters

I recently analyzed a multi-stage PowerShell payload delivery chain involving heavily obfuscated PowerShell loaders and remotely hosted payloads.

The analysis covers PowerShell deobfuscation, hidden execution, Base64/XOR decoding, a decoy “Verification complete!” prompt, payload delivery, and IOCs.

Initial indicators:

203[.]188[.]171[.]166
dorenzaa[.]com

Hey everyone, I'm OP here so feel free to ask questions

Write once, shell everywhere. Sun Microsystems didn't mean it like this.

Talk from today at DEF CON's Bug Bounty Village. Full technique catalog graded for distroless containers, an errno path oracle for black-box target fingerprinting, and three minimal-guessing techniques: bash fd/255, Rails schema_cache.yml deserialization, and a Node.js worker path overwrite without process restart.

Yes, given that the legacy SCT protocol has known security vulnerabilities such as sctphantom, the industry strongly recommends deprecating it and migrating to more secure modern standards to ensure system security.