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DITEKSHEN_MALWARE_Win_Ficker

Detects Ficker infostealer

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

What this rule detects

Detects Ficker infostealer

Associated malware family: Ficker.

Targets: Windows PE.

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

Summary generated from the rule's metadata and condition.

Rule source

malware-win-ficker.yarBSD 2-Clause License
rule DITEKSHEN_MALWARE_Win_Ficker : FILE
{
	meta:
		description = "Detects Ficker infostealer"
		author = "ditekSHen"
		id = "1cfeea86-e8bf-50fb-ba08-435d7a14a913"
		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#L2038-L2055"
		license_url = "https://github.com/ditekshen/detection/blob/e76c93dcdedff04076380ffc60ea54e45b313635/LICENSE.txt"
		logic_hash = "adcc0ffc0e1ded36dc41c22d10d2ea293d5740484203892bcecf89a5f4001452"
		score = 75
		quality = 75
		tags = "FILE"
		clamav_sig = "MALWARE.Win.Trojan.Ficker"

	strings:
		$s1 = "JNOde\\" ascii
		$s2 = "\"SomeNone" fullword ascii
		$s3 = "kindmessage" fullword ascii
		$s4 = "..\\\\?\\.\\UNC\\Windows stdio in console mode does not support writting non-UTF-8 byte sequences" ascii
		$s5 = "..\\\\?\\.\\UNC\\Windows stdio in console mode does not support writing non-UTF-8 byte sequences" ascii
		$s6 = "(os error other os erroroperation interrruptedwrite zerotimed" ascii
		$s7 = "(os error other os erroroperation interruptedwrite zerotimed" ascii
		$s8 = "nPipeAlreadyExistsWouldBlockInvalidInputInvalidDataTimedOutWriteZeroInterruptedOtherN" fullword ascii
		$s9 = "_matherr(): %s in %s(%g, %g)  (retval=%g)" ascii

	condition:
		uint16( 0 ) == 0x5a4d and 5 of them
}

Strings (9 patterns)

IdentifierTypeValueModifiers
$s1text"JNOde\\"ascii
$s2text"\"SomeNone"fullword ascii
$s3text"kindmessage"fullword ascii
$s4text"..\\\\?\\.\\UNC\\Windows stdio in console mode does not support writting non-UTF-8 byte sequences"ascii
$s5text"..\\\\?\\.\\UNC\\Windows stdio in console mode does not support writing non-UTF-8 byte sequences"ascii
$s6text"(os error other os erroroperation interrruptedwrite zerotimed"ascii
$s7text"(os error other os erroroperation interruptedwrite zerotimed"ascii
$s8text"nPipeAlreadyExistsWouldBlockInvalidInputInvalidDataTimedOutWriteZeroInterruptedOtherN"fullword ascii
$s9text"_matherr(): %s in %s(%g, %g) (retval=%g)"ascii

Condition

uint16( 0 ) == 0x5a4d and 5 of them

In plain words (Heuristic)

  • The file must start with “MZ” — a Windows executable (PE).
  • At least 5 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: 1cfeea86-e8bf-50fb-ba08-435d7a14a913

Metadata

clamav_sigMALWARE.Win.Trojan.Ficker

Tags:FILE