Individual skill
detecting-fileless-attacks-on-endpoints
Detects fileless malware and in-memory attacks that execute entirely in RAM without writing persistent files to disk, evading traditional antivirus. Use when building detections for PowerShell-based attacks, reflective DLL injection, WMI persistence, and registry-resident malware. Activates for requests involving fileless malware detection, in-memory attacks, PowerShell exploitation, or living-off-the-land techniques.
internal/tools/skills/data/endpoint-security/detecting-fileless-attacks-on-endpoints/SKILL.md
Source commit d42f381ad34843e71a42658e5c57290c713e85af
What was checked
- Matches the observed repository HEAD
- Yes
- Scanner rules are current
- No
- Repository scan complete
- No
- Skill scan complete
- No
- Observed behavior
- Not checked yet
- Last checked
- Nov 7, 2026
These are observations at the recorded commit, not a guarantee of safety. Review the source before running it.
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Repository context
- Repository stars (not skill ratings)
- 1,313
- Repository last updated
- Nov 7, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- cybersecurity Repository topic
- security Repository topic
- bug-bounty Repository topic
- automation Repository topic
- autonomous-pentesting Repository topic
- ai-agent Repository topic
- ai-security Repository topic
- ethical-hacking Repository topic
- golang Repository topic
- penetration-testing Repository topic
- endpoint Declared skill tag
- fileless-malware Declared skill tag
- memory-attacks Declared skill tag
- powershell Declared skill tag
- detection-engineering Declared skill tag
- engineering Derived category
- writing Derived category
Files and excerpt
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Read excerpt
# Detecting Fileless Attacks on Endpoints
## When to Use
Use this skill when:
- Building detection rules for fileless malware that operates entirely in memory
- Hunting for PowerShell-based attacks, reflective DLL injection, and WMI abuse
- Configuring endpoint telemetry (Sysmon, AMSI, PowerShell logging) to capture fileless indicators
- Investigating incidents where traditional AV found no malicious files
**Do not use** for detecting file-based malware or for malware reverse engineering.
## Detection Gaps & Validation
- **PowerShell logging declared but not capturing:** Script Block (4104) and Module Logging must be set machine-wide (HKLM, not HKCU) and apply to PowerShell v5+; a v2 downgrade (`powershell -version 2`) evades 4104 entirely. Confirm 4104 text is present for a known script before trusting a clean result.