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MALPEDIA_Win_Fakeword_Auto

autogenerated rule brought to you by yara-signator

MalwareFakewordMalpedia 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: Fakeword.

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

Summary generated from the rule's metadata and condition.

Rule source

win-fakeword-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Fakeword_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "5742bbe6-a351-5e75-a811-907f4506a816"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.fakeword"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.fakeword_auto.yar#L1-L125"
		license_url = "N/A"
		logic_hash = "bf3af91eec46a25586a139e90909fd74d2b75e281f4a326e8e73dd924abbc0c7"
		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 = { 668b4d06 6683f901 0f8295010000 8bc1 8db5f8000000 }
		$sequence_1 = { 68???????? 55 be41000000 ff15???????? 8b3d???????? 8b1d???????? c74424781a000000 }
		$sequence_2 = { 81c400010000 c20800 53 ff15???????? 85c0 }
		$sequence_3 = { 33c0 8bfe 68???????? f3ab 56 }
		$sequence_4 = { e8???????? 83c404 6a00 6a00 6a00 68???????? ff15???????? }
		$sequence_5 = { ffd7 8bbc240c010000 8d542408 52 6a35 8d7704 eb11 }
		$sequence_6 = { 83c414 6800000100 68???????? 56 ff15???????? }
		$sequence_7 = { 66895004 8d442414 50 55 e8???????? 8b35???????? }
		$sequence_8 = { 5f 5e 5d 59 c3 80f9c8 7610 }
		$sequence_9 = { c20800 8bc8 56 8bb42408100000 8bd1 57 8d7c240c }

	condition:
		7 of them and filesize < 98304
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 668b4d06 6683f901 0f8295010000 8bc1 8db5f8000000 }
$sequence_1hex{ 68???????? 55 be41000000 ff15???????? 8b3d???????? 8b1d???????? c74424781a000000 }
$sequence_2hex{ 81c400010000 c20800 53 ff15???????? 85c0 }
$sequence_3hex{ 33c0 8bfe 68???????? f3ab 56 }
$sequence_4hex{ e8???????? 83c404 6a00 6a00 6a00 68???????? ff15???????? }
$sequence_5hex{ ffd7 8bbc240c010000 8d542408 52 6a35 8d7704 eb11 }
$sequence_6hex{ 83c414 6800000100 68???????? 56 ff15???????? }
$sequence_7hex{ 66895004 8d442414 50 55 e8???????? 8b35???????? }
$sequence_8hex{ 5f 5e 5d 59 c3 80f9c8 7610 }
$sequence_9hex{ c20800 8bc8 56 8bb42408100000 8bd1 57 8d7c240c }

Condition

7 of them and filesize < 98304

In plain words (Heuristic)

  • The file must be smaller than 98304 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: 5742bbe6-a351-5e75-a811-907f4506a816

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