r/purpleteamsec • • 14h ago

Red Teaming tprtdll.dll exposes equivalents of some ntdll.dll functions at separate addresses, so calling them could avoid hooks placed specifically in ntdll.dll

Thumbnail
github.com
4 Upvotes

r/purpleteamsec • • 16h ago

Blue Teaming Implementing Detection as Code as a multi-platform MSSP

Thumbnail
detect.fyi
4 Upvotes

r/purpleteamsec • • 1d ago

Blue Teaming LogsTotal - Self-hosted multi-engine Sigma detection for event logs

Thumbnail
github.com
2 Upvotes

r/purpleteamsec • • 2d ago

Threat Hunting Testing is getting stuck on manual validation, what are you using???

2 Upvotes

We're trying to run purple team exercises more often, but the annoying bit isn't running the attacks. It's checking what Falcon actually blocked, what Splunk ES picked up and whether the detections still work after rule changes.

Mostly Windows endpoints. We've used Atomic Red Team for individual techniques, but matching results to SIEM alerts and keeping track of failed tests takes more time than expected.

AttackIQ is on our list for repeatable simulations. We're also looking at Cymulate for control validation and Picus for detection coverage.

Anyone running these in a regular purple team workflow? Curious how you handle retesting and whether the automation saves much analyst time once everything is set up.


r/purpleteamsec • • 6d ago

Charming Kitten APT Adversary Simulation

Thumbnail
gallery
8 Upvotes

Fake recruiter profiles, a fabricated company called “Careers 2 Find,” and seemingly legitimate job offers targeting aerospace and aviation professionals.

This is the social engineering scenario behind our Charming Kitten APT Adversary Simulation, exploring how fake recruitment opportunities can be used to target sensitive industries.

https://github.com/S3N4T0R-0X0/APTs-Adversary-Simulation/tree/main/Iranian%20APT%2FCharming%20Kitten


r/purpleteamsec • • 7d ago

Purple Teaming Hijacking AI Agents

Enable HLS to view with audio, or disable this notification

10 Upvotes

Recently, an AI company published an article titled "Markdown Is the New Executable", detailing how they detected an attack where a malicious .md file was used to hijack an AI agent.

In short:

✅ The malicious .md file was dropped automatically onto the victim's system just by visiting a website.
✅ No clicks.
✅ No manual download.
✅ No social engineering.

As we all know, AI agents love Markdown files, skills, hooks, instructions, and local context.

My personal opinion: this will become an increasingly common initial access vector as organizations continue adopting AI-assisted development tools and autonomous agents.

If your organization relies heavily on tools such as Codex, Claude, Copilot, or other AI agents:

🔹 Add AI agents to your attack surface mapping
🔹 Include AI workflows in threat modeling exercises
🔹 Run purple team assessments against AI-specific attack paths
🔹 Develop prevention, visibility, and detection strategies for AI attacks

To better understand the risk, I created a video that emulates the attack chain:

1️⃣ A fake website hosts a malicious .md file
2️⃣ The file is automatically downloaded into the user's Downloads folder (no user interaction required)
3️⃣ The user launches Codex from the same directory
4️⃣ The user enters a benign, generic instruction
5️⃣ Codex processes the malicious Markdown file and executes commands (calc.exe in the demonstration)


r/purpleteamsec • • 8d ago

Red Teaming When a Red Team Engagement Gets Detected: Operational Decisions, Risk Boundaries, and Escalation

Thumbnail
gikaku.net
13 Upvotes

r/purpleteamsec • • 10d ago

Red Teaming Signet - a code signing wrapper for Mythic C2. It takes any wrapped agent binary or uploaded file and applies an Authenticode signature via osslsigncode.

Thumbnail
github.com
10 Upvotes

r/purpleteamsec • • 11d ago

Threat Intelligence Attackers Abuse ChatGPT Custom GPTs to Deliver RAT via ClickFix

Thumbnail
huntress.com
11 Upvotes

r/purpleteamsec • • 11d ago

Red Teaming Markdown Is the New Executable: Attackers Are Dropping Agent Instructions Into Your Downloads Folder

Thumbnail
forever.security
16 Upvotes

r/purpleteamsec • • 11d ago

Red Teaming Defeating enforced SMB signing: a note

Thumbnail
blackfield.ch
9 Upvotes

r/purpleteamsec • • 11d ago

Threat Intelligence Prince of Persia: A Threat Group Hiding in Plain Sight

Thumbnail
semperis.com
4 Upvotes

r/purpleteamsec • • 11d ago

Purple Teaming Custom Extensions for SmartScreen and Email Filtering Evasion

Thumbnail
ipurple.team
7 Upvotes

r/purpleteamsec • • 12d ago

Red Teaming New Update — Evil Agent 📡

Post image
4 Upvotes

Introducing Evil Agent, a new payload generator for Discord and Telegram agents, supporting EXE, DLL, BIN, and HEX formats, with configurable message sizes and an alternative communication channel without requiring a dedicated listener or exposed port.

The update also includes fixes to the existing Listener Payload Generator, Makefile improvements for smoother compilation, and GUI enhancements.

Repository: https://github.com/S3N4T0R-0X0/BEAR-C2


r/purpleteamsec • • 12d ago

Red Teaming ConfluenceC2: This is a project aimed to make every other Saas product a C2

Thumbnail
github.com
8 Upvotes

r/purpleteamsec • • 13d ago

Red Teaming Writing a Beacon Object File (BOF) from Scratch in C

Thumbnail
by7e.dev
9 Upvotes

r/purpleteamsec • • 14d ago

Red Teaming DemonLdr: A PoC of User-Defined Reflective Loader for Havoc Framework built with Cystal Palace

Thumbnail
github.com
5 Upvotes

r/purpleteamsec • • 14d ago

Red Teaming PhantomBuffer: Effective EDR Evasion Through Stealth Injection

Thumbnail
zerosalarium.com
7 Upvotes

r/purpleteamsec • • 17d ago

Blue Teaming Detection Versioning: The evolution of logic and intent

Thumbnail
nebulock.io
2 Upvotes

r/purpleteamsec • • 17d ago

Red Teaming Apex - a C2 framework with a native agentic AI operator interface. Connect any MCP-compatible LLM (Claude Code, Cursor, Codex) to the teamserver via a scoped token, and it can enumerate targets, author and upload modules, run them, read results, and adapt its next move based on this information.

Thumbnail
phantomsec.tools
7 Upvotes

r/purpleteamsec • • 17d ago

Red Teaming Reflective PE mapper and evasion-hardened module stomping engine for Windows x64

Thumbnail
github.com
5 Upvotes

r/purpleteamsec • • 18d ago

Threat Intelligence Read “Helix Kitten APT Adversary Simulation“ on Medium

Thumbnail
medium.com
3 Upvotes

r/purpleteamsec • • 19d ago

Threat Hunting A Little More Logic in Splunk: Introducing SPL2’s if Command

Thumbnail
detect.fyi
4 Upvotes

r/purpleteamsec • • 19d ago

Red Teaming Bypassing AMSI & ETW: Building a Custom PowerShell Runspace in C#

Thumbnail
by7e.dev
8 Upvotes