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mukul975 cb8d79e068 Map all 754 skills to MITRE ATT&CK v19.1

- Add validated mitre_attack frontmatter to all 754 skills (286 distinct
  techniques), verified against MITRE ATT&CK v19.1 via the official
  mitreattack-python library: 0 revoked, deprecated, or invalid IDs
- Curate precise per-skill technique IDs for forensics, malware-analysis,
  threat-intel, and red-team skills (e.g. DCSync -> T1003.006,
  Kerberoasting -> T1558.003, Pass-the-Ticket -> T1550.003)
- Reconcile v19.1 tactic restructuring: Defense Evasion split into
  Stealth (TA0005) and Defense Impairment (TA0112); revoked T1562.*
  family and T1070.001/.002 remapped to active equivalents (T1685.*)
- Normalize word-split tags across 35 skills (remove filename-derived
  stopword tags, add semantic cybersecurity tags)
- Add api-reference.md for 3 skills that were missing it
- Update README ATT&CK section with accurate v19.1 tactic distribution

2026-06-01 12:13:29 +02:00

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Analyzing Persistence Mechanisms in Linux

Overview

Adversaries establish persistence on Linux systems through crontab jobs, systemd service/timer units, LD_PRELOAD library injection, shell profile modifications (.bashrc, .profile), SSH authorized_keys backdoors, and init script manipulation. This skill scans for all known persistence vectors, checks file timestamps and integrity, and correlates findings with auditd logs to build a timeline of persistence installation.

When to Use

When investigating security incidents that require analyzing persistence mechanisms in linux
When building detection rules or threat hunting queries for this domain
When SOC analysts need structured procedures for this analysis type
When validating security monitoring coverage for related attack techniques

Prerequisites

Root or sudo access on target Linux system (or forensic image)
auditd configured with file watch rules on persistence paths
Python 3.8+ with standard library (os, subprocess, json)
Optional: OSSEC/Wazuh agent for file integrity monitoring alerts

Steps

Scan Crontab Entries — Enumerate all user crontabs, /etc/cron.d/, /etc/cron.daily/, and anacron jobs for suspicious commands
Audit Systemd Units — Check /etc/systemd/system/ and ~/.config/systemd/user/ for non-package-managed service and timer units
Detect LD_PRELOAD Hijacking — Check /etc/ld.so.preload and LD_PRELOAD environment variable for injected shared libraries
Inspect Shell Profiles — Scan .bashrc, .bash_profile, .profile, /etc/profile.d/ for injected commands or reverse shells
Check SSH Authorized Keys — Audit all authorized_keys files for unauthorized public keys with command restrictions
Correlate Auditd Logs — Search auditd logs for file modification events on persistence paths to build an installation timeline
Generate Persistence Report — Produce a risk-scored report of all discovered persistence mechanisms

Expected Output

JSON report of all persistence mechanisms found with risk scores
Timeline of persistence installation from auditd correlation
MITRE ATT&CK technique mapping (T1053, T1543, T1574, T1546)
Remediation commands for each detected persistence mechanism

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