YARA · Signature Base (Florian Roth / Nextron)
SIGNATURE_BASE_M_APT_VIRTUALPITA_4
Finds opcodes from 401f1c to 401f4f in fe34b7c071d96dac498b72a4a07cb246 to decode text with multiple XORs
- Author
- Mandiant
- Date
- 2022-10-01
- Modified
- 2025-12-19
- Score / Quality
- 75 / 85
What this rule detects
Finds opcodes from 401f1c to 401f4f in fe34b7c071d96dac498b72a4a07cb246 to decode text with multiple XORs
Targets: Linux ELF.
It defines 1 patterns (0 text, 1 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
rule SIGNATURE_BASE_M_APT_VIRTUALPITA_4 : FILE
{
meta:
= "Finds opcodes from 401f1c to 401f4f in fe34b7c071d96dac498b72a4a07cb246 to decode text with multiple XORs"
= "Mandiant"
= "58d4db75-fcd5-50c2-93ba-a8a4718ac0f6"
= "2022-10-01"
= "2025-12-19"
= "https://github.com/Neo23x0/signature-base"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/yara/apt_unc3886_virtualpita.yar#L39-L50"
= "https://github.com/Neo23x0/signature-base/blob/94a1c48d7ab499879287ff611dfe7f9c56376030/LICENSE"
= "fe34b7c071d96dac498b72a4a07cb246"
= "aaf2ff682c619d2a254fe069d477654a161658db6315239f1b956141b6a72c01"
= 75
= 85
= "FILE"
strings:
$x = { 4? 8b 4? ?? 4? 83 c1 30 4? 8b 4? ?? 4? 8b 10 8b 4? ?? 4? 98 4? 8b 04 ?? ?? ?? ?? ?? 4? 31 c2 4? 8b 4? ?? 4? 83 c0 28 4? 8b 00 4? c1 e8 10 0f b6 c0 4? 98 4? 8b 04 }
condition:
uint32( 0 ) == 0x464c457f and all of them
}
Strings (1 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $x | hex | { 4? 8b 4? ?? 4? 83 c1 30 4? 8b 4? ?? 4? 8b 10 8b 4? ?? 4? 98 4? 8b 04 ?? ?? ?? ?? ?? 4? 31 c2 4? 8b 4? ?? 4? 83 c0 28 4? 8b 00 4? c1 e8 10 0f b6 c0 4? 98 4? 8b … |
Condition
uint32( 0 ) == 0x464c457f and all of themIn plain words (Heuristic)
- The file must start with the ELF header — a Linux/Unix executable.
- All patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
Sample hashes
Hashes of samples the author lists in the rule's meta (look them up in your threat-intelligence platform).
- fe34b7c071d96dac498b72a4a07cb246
Licence & attribution
Author: Mandiant
Source repository: Signature Base (Florian Roth / Nextron) @ 94a1c48d7a
Licence: Detection Rule License 1.1 (repository licence)
Mirrored via YARA Forge 20260927, which prefixes rule names with the source and adds normalised meta fields.
Rule id: 58d4db75-fcd5-50c2-93ba-a8a4718ac0f6
Tags:FILE
Related rules
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2022-04-28
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-04-20
- APT / threat actorSignature Base (Florian Roth / Nextron)· Mandiant· 2023-03-04