Individual skill
detecting-fileless-malware-techniques
Detects and analyzes fileless malware that operates entirely in memory using PowerShell, WMI, .NET reflection, registry-resident payloads, and living-off-the-land binaries (LOLBins) without writing traditional executable files to disk. Use for requests involving fileless threat detection, in-memory malware investigation, LOLBin abuse analysis, or WMI persistence examination.
skills/detecting-fileless-malware-techniques/SKILL.md
Source commit 54a798831d2266a3ca61ce68a7acb80b81160d57
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- Yes
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- Observed behavior
- Not checked yet
- Last checked
- Nov 9, 2026
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Repository context
- Repository stars (not skill ratings)
- 35,972
- Repository last updated
- Aug 31, 2026
- License
- Apache-2.0
Observed agent integration: No specific integration evidence. Standard SKILL.md installation does not imply verified compatibility.
- ai-agents Repository topic
- claude-code Repository topic
- cybersecurity Repository topic
- incident-response Repository topic
- mitre-attack Repository topic
- penetration-testing Repository topic
- red-team Repository topic
- security Repository topic
- cloud-security Repository topic
- malware-analysis Repository topic
- malware Declared skill tag
- fileless Declared skill tag
- lolbins Declared skill tag
- memory-analysis Declared skill tag
- detection Declared skill tag
- writing Derived category
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LICENSEasset · 11,255 bytesSKILL.mdcore · 16,805 bytesSKILL.mdcore · 16,805 bytesSKILL.mdcore · 16,805 bytesSKILL.mdcore · 16,805 bytesSKILL.mdcore · 16,805 bytesreferences/api-reference.mddoc · 2,600 bytesreferences/yara-fileless-powershell.yarasset · 478 bytesscripts/agent.pyruns · 8,656 bytes
Read excerpt
# Detecting Fileless Malware Techniques
## When to Use
- EDR alerts indicate suspicious behavior from trusted system binaries (PowerShell, mshta, wmic, regsvr32)
- Investigating attacks that leave no traditional malware files on disk
- Analyzing WMI event subscriptions, registry-stored payloads, or scheduled task abuse for persistence
- Building detection rules for LOLBin (Living Off the Land Binary) abuse in enterprise environments
- Memory forensics reveals malicious code but no corresponding files exist on the filesystem
**Do not use** for traditional file-based malware; standard static and dynamic analysis methods are more appropriate for disk-resident malware.
## Windows Defender / Antivirus False Positive
