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YARA · HarfangLab IOCs

HARFANGLAB_Vbscript_RAR_CVE_2025_8088

Matches RAR5 archives exploiting CVE-2025-8088 to drop VBScript into Startup folder, used by Gamaredon in late 2025 - mid 2026

ExploitHarfangLab IOCsNo licence (all rights reserved)Compiles with YARA-X
Author
HarfangLab
Date
2026-05-13
Modified
2026-05-18
Score / Quality
75 / 80

What this rule detects

Matches RAR5 archives exploiting CVE-2025-8088 to drop VBScript into Startup folder, used by Gamaredon in late 2025 - mid 2026

It defines 6 patterns (4 text, 2 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Rule text not reproduced

This rule comes from HarfangLab IOCs, which does not grant a licence to redistribute its rules (No licence (all rights reserved)). We show its metadata only. Read the original rule upstream:

View the rule on GitHubOpen the repository

Sample hashes

Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).

  • 00b8e381046d4e024a97d0402c3fe29f9d7f5114b2a932003d3e089cfdf992c1

Licence & attribution

Author: HarfangLab

Source repository: HarfangLab IOCs @ 3e2b674bf2

Licence: No licence (all rights reserved) (repository licence)

Original rule

Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.

Rule id: 2ad8fcfd-a85c-5cdf-87b2-a921d35aada1

Metadata

contextfile

Tags:CVE_2025_8088FILE

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