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YARA · Avast / Gen Digital IOC

AVASTTI_Cobaltstrike_Raw_Payload_Dns_Stager_X86_Utf16

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-utf16.yarDetection Rule License 1.1
rule AVASTTI_Cobaltstrike_Raw_Payload_Dns_Stager_X86_Utf16
{
	meta:
		description = "No description has been set in the source file - AvastTI"
		author = "Gen Threat Labs"
		id = "d148ca33-b233-519d-8ba4-d389de721d15"
		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#L339-L354"
		license_url = "N/A"
		logic_hash = "3519d2af99a159483ba22cd87907bcc87bea1cfc2fb92f5f0334fff1c385ef00"
		score = 75
		quality = 90
		tags = ""

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

	condition:
		uint32( @h01 + 0x0149 ) == 0xe5005300 and uint32( @h01 + 0x017d ) == 0x07002600 and uint32( @h01 + 0x0261 ) == 0xc9009c00 and uint32( @h01 + 0x0333 ) == 0x5600a200 and uint32( @h01 + 0x034b ) == 0xe0003500 and uint32( @h01 + 0x03cb ) == 0xcc008e00
}

Strings (1 patterns)

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

Condition

uint32( @h01 + 0x0149 ) == 0xe5005300 and uint32( @h01 + 0x017d ) == 0x07002600 and uint32( @h01 + 0x0261 ) == 0xc9009c00 and uint32( @h01 + 0x0333 ) == 0x5600a200 and uint32( @h01 + 0x034b ) == 0xe0003500 and uint32( @h01 + 0x03cb ) == 0xcc008e00

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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: d148ca33-b233-519d-8ba4-d389de721d15

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