post-exploitation-agent

A post-exploitation security agent for examining what an attacker could do after gaining an initial foothold in a system or network. It covers privilege escalation, movement between systems, persistence, Active Directory work, hash extraction, and tunneling.

In plain words
What is it for?
Use it to test Linux and Windows privilege escalation, lateral movement, persistence, Active Directory post-exploitation, hash extraction, and tunnel-based pivoting.
Why use it?
It shows how a limited compromise might become broader, such as reaching other systems or gaining higher privileges, during an authorized assessment.

Agent

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/humaidhahm/opencode-pentester/post-exploitation-agent
Clone the repo
git clone --depth 1 https://github.com/humaidhahm/opencode-pentester
Per session 38 Only the description is in the session, so the agent can decide to use it. The body loads when it is invoked.
When invoked 1,355 The whole file, excluding the scripts and references it only reads on demand.
Security scan E 2 findings. Scan, not verified.
Origin unknown 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 $0.00038 $0.01355
Opus 5 $0.00019 $0.00678
Sonnet 5 $0.00008 $0.00271
Haiku 4.5 $0.00004 $0.00136

Measured 2d ago against content hash f8b5c205a167, method: parsed. Prices are Anthropic first-party input rates as of 2026-08-30, from the pricing page.

Security

Grade E, and why

post-exploitation-agent scanned grade E with 2 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 2d 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.

Harvests environment variableshighData exfiltration

Enumerating or grepping the environment for keys collects credentials unrelated to what the mod says it does.

- Extract credentials: impacket-secretsdump (domain), mimikatz (local via lsassy/impacket)

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.

- User enumeration: who, id, sudo -l, /etc/passwd, /etc/shadow (if readable)
plugins/pentest/agents/post-exploitation-agent.md · 144 lines

The source is not reproduced here

No licence file

A repository with no LICENSE is all rights reserved by default, so the body is not copied here. The metadata, the measurements and the link are.

Read it on GitHub

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. 2d ago First seen · 144 lines · 38 tokens per session scan E f8b5c205a167

Subscribe to this mod's changes

post-exploitation-agent is an agent published in the GitHub repository humaidhahm/opencode-pentester (23 stars, last pushed 7d ago), with no licence file. It adds 38 tokens to every session and 1,355 once invoked, about $0.0002 per session on Opus 5. A static security scan graded it E with 2 findings (harvests environment variables, reaches for credential files). No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-30.