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YARA · ditekSHen detection

DITEKSHEN_MALWARE_Win_Fabookie

Detects Fabookie / ElysiumStealer

MalwareFabookieditekSHen detectionBSD 2-Clause LicenseCompiles with YARA-X
Author
ditekSHen
Date
2020-11-06
Modified
2024-11-01
Score / Quality
75 / 73

What this rule detects

Detects Fabookie / ElysiumStealer

Associated malware family: Fabookie.

Targets: Windows PE.

It defines 9 patterns (9 text, 0 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

Download .yar
malware-win-fabookie.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Fabookie : FILE
{
	meta:
		description = "Detects Fabookie / ElysiumStealer"
		author = "ditekSHen"
		id = "dfa653c4-37d9-5e31-9c47-23adf751e4aa"
		date = "2020-11-06"
		modified = "2024-11-01"
		reference = "https://github.com/ditekshen/detection"
		source_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/yara/malware.yar#L5608-L5624"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "bbe10323817d501a361a33abf61a49ad59fcac69d78d9d9ec1744ee99a4b4629"
		score = 75
		quality = 73
		tags = "FILE"

	strings:
		$s1 = "rwinssyslog" fullword wide
		$s2 = "_kasssperskdy" fullword wide
		$s3 = "[Title:%s]" fullword wide
		$s4 = "[Execute]" fullword wide
		$s5 = "[Snapshot]" fullword wide
		$s6 = "Mozilla/4.0 (compatible)" fullword wide
		$s7 = "d-k netsvcs" fullword wide
		$s8 = "facebook.websmails.com" fullword wide
		$s9 = "CUdpClient::Start" fullword ascii

	condition:
		( uint16( 0 ) == 0x5a4d or uint16( 0 ) == 0x0805 ) and 6 of them
}

Strings (9 patterns)

IdentifierTypeValueModifiers
$s1text"rwinssyslog"fullword wide
$s2text"_kasssperskdy"fullword wide
$s3text"[Title:%s]"fullword wide
$s4text"[Execute]"fullword wide
$s5text"[Snapshot]"fullword wide
$s6text"Mozilla/4.0 (compatible)"fullword wide
$s7text"d-k netsvcs"fullword wide
$s8text"facebook.websmails.com"fullword wide
$s9text"CUdpClient::Start"fullword ascii

Condition

( uint16( 0 ) == 0x5a4d or uint16( 0 ) == 0x0805 ) and 6 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 6 patterns in the rule must match.

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References

Licence & attribution

Author: ditekSHen

Source repository: ditekSHen detection @ e76c93dcde

Licence: BSD 2-Clause License (repository licence)

Copyright notice: Copyright 2021 by ditekSHen (https://github.com/ditekshen/detection).

Original rule

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

Rule id: dfa653c4-37d9-5e31-9c47-23adf751e4aa

Tags:FILE

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