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YARA · Avast / Gen Digital IOC

AVASTTI_Cobaltstrike_Raw_Payload_Dns_Stager_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 1 patterns (0 text, 1 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
cobaltstrike-raw-payload-dns-stager-x86.yarDetection Rule License 1.1
rule AVASTTI_Cobaltstrike_Raw_Payload_Dns_Stager_X86
{
	meta:
		description = "No description has been set in the source file - AvastTI"
		author = "Gen Threat Labs"
		id = "817c4a72-7be1-5a58-987d-fe203d7778ea"
		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#L1-L26"
		license_url = "N/A"
		logic_hash = "d447fac16f0a712b1c264bc83b4cf2e56e5e98b369617799b981cd75b37c3511"
		score = 75
		quality = 90
		tags = ""

	strings:
		$h01 = { FC E8 89 00 00 00 60 89 E5 31 D2 64 8B 52 30 8B 52 0C 8B 52 14 8B 72 28 }

	condition:
		uint32( @h01 + 0x00a3 ) == 0xe553a458 and uint32( @h01 + 0x00bd ) == 0x0726774c and uint32( @h01 + 0x012f ) == 0xc99cc96a and uint32( @h01 + 0x0198 ) == 0x56a2b5f0 and uint32( @h01 + 0x01a4 ) == 0xe035f044 and uint32( @h01 + 0x01e4 ) == 0xcc8e00f4
}

Strings (1 patterns)

IdentifierTypeValueModifiers
$h01hex{ FC E8 89 00 00 00 60 89 E5 31 D2 64 8B 52 30 8B 52 0C 8B 52 14 8B 72 28 }

Condition

uint32( @h01 + 0x00a3 ) == 0xe553a458 and uint32( @h01 + 0x00bd ) == 0x0726774c and uint32( @h01 + 0x012f ) == 0xc99cc96a and uint32( @h01 + 0x0198 ) == 0x56a2b5f0 and uint32( @h01 + 0x01a4 ) == 0xe035f044 and uint32( @h01 + 0x01e4 ) == 0xcc8e00f4

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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: 817c4a72-7be1-5a58-987d-fe203d7778ea

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