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MALPEDIA_Win_Fickerstealer_Auto

autogenerated rule brought to you by yara-signator

MalwareFickerstealerMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2026-05-04
Modified
2026-05-18
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

Associated malware family: Fickerstealer.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-fickerstealer-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Fickerstealer_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "6f85756a-c843-575d-b94d-3b2f734b01f0"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.fickerstealer"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.fickerstealer_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "aa8d1c23014e11385c0a5d073235ca609911431bbe1a8732876dd8cee6965456"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20260422"
		malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
		malpedia_version = "20260504"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { c70201000000 894a08 894204 eb0e 8b4df0 89d8 2b45ec }
		$sequence_1 = { 83a4240802000000 e8???????? 6a08 58 8b4d08 e9???????? 8d842418020000 }
		$sequence_2 = { 8919 895104 894108 e8???????? 894604 31c0 895608 }
		$sequence_3 = { 5e 5d c3 89c1 52 56 e8???????? }
		$sequence_4 = { 0d0000f07f 660f6ec0 e9???????? 8b4d0c 89c6 89ca 21da }
		$sequence_5 = { f20f1000 f20f104808 8d45e4 09f1 8d75d4 894d94 89f1 }
		$sequence_6 = { e8???????? 50 e8???????? 5e 5d c3 55 }
		$sequence_7 = { 8d8c2400010000 e8???????? 8d8c2444010000 e8???????? 897c2408 89742404 31ff }
		$sequence_8 = { 8b4dec e8???????? eb2a 31d2 eb18 85c9 7412 }
		$sequence_9 = { a820 b900000000 0f45fe 0f45f1 247f 3c40 0f43f9 }

	condition:
		7 of them and filesize < 598016
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c70201000000 894a08 894204 eb0e 8b4df0 89d8 2b45ec }
$sequence_1hex{ 83a4240802000000 e8???????? 6a08 58 8b4d08 e9???????? 8d842418020000 }
$sequence_2hex{ 8919 895104 894108 e8???????? 894604 31c0 895608 }
$sequence_3hex{ 5e 5d c3 89c1 52 56 e8???????? }
$sequence_4hex{ 0d0000f07f 660f6ec0 e9???????? 8b4d0c 89c6 89ca 21da }
$sequence_5hex{ f20f1000 f20f104808 8d45e4 09f1 8d75d4 894d94 89f1 }
$sequence_6hex{ e8???????? 50 e8???????? 5e 5d c3 55 }
$sequence_7hex{ 8d8c2400010000 e8???????? 8d8c2444010000 e8???????? 897c2408 89742404 31ff }
$sequence_8hex{ 8b4dec e8???????? eb2a 31d2 eb18 85c9 7412 }
$sequence_9hex{ a820 b900000000 0f45fe 0f45f1 247f 3c40 0f43f9 }

Condition

7 of them and filesize < 598016

In plain words (Heuristic)

  • The file must be smaller than 598016 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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References

Licence & attribution

Author: Felix Bilstein - yara-signator at cocacoding dot com

Source repository: Malpedia signator rules @ c901f97b7d

Licence: Creative Commons Attribution-ShareAlike 4.0 (repository licence)

Original rule

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

Rule id: 6f85756a-c843-575d-b94d-3b2f734b01f0

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE