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analyzing-wiper-malware

Analyzes destructive wiper malware by identifying raw-disk and MBR/VBR overwrite primitives, boot-record tampering, mass-deletion and backup-destruction behavior, and distinguishing wipers from ransomware. Activates for requests to analyze a wiper, identify destructive disk-overwrite behavior, or tell a wiper apart from ransomware.

中文简介正在准备中。当前显示原文说明。

查看安装方法

包含的文件(4)

  • SKILL.md2.8 KB
  • LICENSE340 B
  • references/api-reference.md1.4 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。

Analyzing Wiper Malware

When to Use

  • You have a sample suspected of destructive intent and need to identify disk-overwrite, MBR/VBR tampering, and mass-deletion primitives.
  • You must distinguish a wiper (irreversible destruction) from ransomware (encryption for ransom).

Do not use this on a live host or by running the sample — destructive behavior is the threat. Analyze statically in isolation.

Prerequisites

  • The sample, read inertly.

Safety & Handling

  • Read bytes statically; never execute. A wiper run is unrecoverable — isolation is mandatory.

Workflow

Step 1: Detect destructive primitives

python scripts/analyst.py scan sample.bin

Flags raw-disk handles (\\.\PhysicalDrive, \\.\C:), DeviceIoControl, MBR/VBR write patterns, CreateFileMapping over the boot sector, and bulk DeleteFile/overwrite loops.

Step 2: Detect backup/recovery destruction

Surface vssadmin delete shadows, wbadmin delete, bcdedit /set recoveryenabled no, and wevtutil cl (log clearing) — common wiper recovery-denial steps.

Step 3: Distinguish wiper vs ransomware

Weigh destruction-without-crypto and absence of a ransom note / key exchange against encryption-and-extortion indicators to classify intent.

Step 4: Document

Record the destruction method (overwrite pattern, MBR vs file-level) and recovery-denial steps.

Validation

  • Destructive primitives reference real raw-disk/boot-record APIs, not generic file IO.
  • Recovery-denial commands are detected where present.
  • The wiper-vs-ransomware classification cites concrete evidence.

Pitfalls

  • Disk utilities and secure-erase tools share these primitives — context is essential.
  • Pseudo-ransomware wipers that display a note but cannot decrypt (intent is destruction).
  • Bootloader-only wipers needing boot-sector analysis (pair with the rootkit/bootkit skill).

References

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