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YARA · Avast / Gen Digital IOC

AVASTTI_Cobaltstrike_Beacon_X86

No description has been set in the source file - AvastTI

Hack toolCobalt StrikeAvast / Gen Digital IOCDetection Rule License 1.1Compiles with YARA-X
Author
Gen Threat Labs
Date
2021-07-08
Modified
2026-03-11
Score / Quality
75 / 90

What this rule detects

No description has been set in the source file - AvastTI

Associated malware family: Cobalt Strike.

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

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
cobaltstrike-beacon-x86.yarDetection Rule License 1.1
rule AVASTTI_Cobaltstrike_Beacon_X86
{
	meta:
		description = "No description has been set in the source file - AvastTI"
		author = "Gen Threat Labs"
		id = "6ffaafe6-2758-53e4-b5b8-6d8350baf428"
		date = "2021-07-08"
		modified = "2026-03-11"
		reference = "https://github.com/gendigitalinc/ioc"
		source_url = "https://github.com/avast/ioc/blob/a450ddabed95984422909c75ac52b6841f685983/CobaltStrike/yara_rules/cs_rules.yar#L615-L632"
		license_url = "N/A"
		logic_hash = "e6328aae5954ac8e3914e65603813ba4f11d97ff91d08a1398e1f71740879463"
		score = 75
		quality = 90
		tags = ""

	strings:
		$h01 = { 4D 5A E8 00 00 00 00 5B 89 DF 52 45 55 89 E5 81 C3 ?? ?? ?? ?? FF D3 68 }
		$h11 = { 00 01 00 01 00 02 ?? ?? 00 02 00 01 00 02 ?? ?? 00 }
		$h12 = { 69 68 69 68 69 6B ?? ?? 69 6B 69 68 69 6B ?? ?? 69 }
		$h13 = { 2E 2F 2E 2F 2E 2C ?? ?? 2E 2C 2E 2F 2E 2C ?? ?? 2E }

	condition:
		$h01 and any of ( $h1* )
}

Strings (4 patterns)

IdentifierTypeValueModifiers
$h01hex{ 4D 5A E8 00 00 00 00 5B 89 DF 52 45 55 89 E5 81 C3 ?? ?? ?? ?? FF D3 68 }
$h11hex{ 00 01 00 01 00 02 ?? ?? 00 02 00 01 00 02 ?? ?? 00 }
$h12hex{ 69 68 69 68 69 6B ?? ?? 69 6B 69 68 69 6B ?? ?? 69 }
$h13hex{ 2E 2F 2E 2F 2E 2C ?? ?? 2E 2C 2E 2F 2E 2C ?? ?? 2E }

Condition

$h01 and any of ( $h1* )

In plain words (Heuristic)

  • At least one pattern in ( $h1* ) must match.
  • Pattern $h01 must be present.

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References

Licence & attribution

Author: Gen Threat Labs

Source repository: Avast / Gen Digital IOC @ a450ddabed

Licence: Detection Rule License 1.1 (repository licence)

Original rule

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

Rule id: 6ffaafe6-2758-53e4-b5b8-6d8350baf428

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