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hunting-data-staging-and-archiving

Hunts for pre-exfiltration data staging and archiving by detecting archive-tool execution (rar, 7z, zip, tar), large compressed files written to staging directories, and collection into a single location before transfer. Activates for requests to hunt data staging, detect pre-exfil archiving, or find collection and compression before exfiltration.

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查看安装方法

包含的文件(4)

  • SKILL.md2.7 KB
  • LICENSE340 B
  • references/api-reference.md1.1 KB
  • scripts/analyst.py3.0 KB

SKILL.md(原文)

安装前可以查看交给 AI 代理的指令内容。

Hunting Data Staging and Archiving

When to Use

  • You have process-creation and file telemetry and want to detect an actor collecting and compressing data into a staging location before exfiltration.
  • You are looking for the step between collection and exfil.

Do not use this to alert on all archive usage — backups and legitimate compression are common. Hunt the staging context (temp paths, password-protected archives, unusual parents).

Prerequisites

  • Process-creation events (with command line) and/or file-write telemetry.

Workflow

Step 1: Detect archive-tool execution

python scripts/analyst.py hunt events.csv

Flags rar/7z/zip/tar/winrar execution with compression + password flags (a -hp, -p, -r), and archives written to staging paths (%TEMP%, %APPDATA%, ProgramData, C:\Users\Public).

Step 2: Surface large/odd archives

Highlight large archive writes and archives created by unusual parents (Office, script hosts, remote-exec services).

Step 3: Confirm

Correlate with subsequent outbound transfer of the archive (pair with the unusual-outbound hunt).

Step 4: Operationalize

Write a detection for password-protected archiving into staging directories.

Validation

  • Archive execution is flagged with the compression/password flags, not tool presence alone.
  • Staging-path writes are surfaced with the file path.
  • Findings map to ATT&CK T1074 / T1560.

Pitfalls

  • Legitimate backup/IT archiving — corroborate with path, parent, and password use.
  • Built-in tar/Compress-Archive blending into normal admin activity.
  • Split archives (.r00, .z01) that evade single-file size thresholds.

References

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