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MALPEDIA_Win_Boldmove_Auto

autogenerated rule brought to you by yara-signator

MalwareBoldmoveMalpedia 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: Boldmove.

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

Summary generated from the rule's metadata and condition.

Rule source

win-boldmove-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Boldmove_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "fb4a2759-1b2e-5ff5-b378-bcca574f0870"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.boldmove"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.boldmove_auto.yar#L1-L131"
		license_url = "N/A"
		logic_hash = "456546fae78eb1eba848500e10643ada4127a40c12ab9cae5c0f123ab6aa09f5"
		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 = { 895df0 31da 8b5de0 31ce c1c210 c1c607 }
		$sequence_1 = { c744243801000000 8b442440 895c2404 892c24 89442410 8b442448 8944240c }
		$sequence_2 = { 89442404 8b85c4fbffff 897c2410 8d8405e8fbffff 890424 e8???????? }
		$sequence_3 = { eb14 f6431402 740e 895d08 83c410 5b 5e }
		$sequence_4 = { 894c2418 0f852f0e0000 8b542454 85d2 0f8599000000 f7c500060000 }
		$sequence_5 = { 890f bf10000000 99 f7ff bf04000000 0fb63406 89c8 }
		$sequence_6 = { 89c2 31c0 c745c45f244762 89d7 f3ab 8b4508 8d7a44 }
		$sequence_7 = { c744247401000000 8b542458 c744246400000000 85d2 0f88e4050000 8b44244c 85c0 }
		$sequence_8 = { 0f8715130000 8db42600000000 8d04b6 83c701 8d7442d0 0fb617 8d4ad0 }
		$sequence_9 = { c744247cffffffff 39c6 0f8cfbf1ffff e9???????? 8b442430 8b4004 83c001 }

	condition:
		7 of them and filesize < 242688
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 895df0 31da 8b5de0 31ce c1c210 c1c607 }
$sequence_1hex{ c744243801000000 8b442440 895c2404 892c24 89442410 8b442448 8944240c }
$sequence_2hex{ 89442404 8b85c4fbffff 897c2410 8d8405e8fbffff 890424 e8???????? }
$sequence_3hex{ eb14 f6431402 740e 895d08 83c410 5b 5e }
$sequence_4hex{ 894c2418 0f852f0e0000 8b542454 85d2 0f8599000000 f7c500060000 }
$sequence_5hex{ 890f bf10000000 99 f7ff bf04000000 0fb63406 89c8 }
$sequence_6hex{ 89c2 31c0 c745c45f244762 89d7 f3ab 8b4508 8d7a44 }
$sequence_7hex{ c744247401000000 8b542458 c744246400000000 85d2 0f88e4050000 8b44244c 85c0 }
$sequence_8hex{ 0f8715130000 8db42600000000 8d04b6 83c701 8d7442d0 0fb617 8d4ad0 }
$sequence_9hex{ c744247cffffffff 39c6 0f8cfbf1ffff e9???????? 8b442430 8b4004 83c001 }

Condition

7 of them and filesize < 242688

In plain words (Heuristic)

  • The file must be smaller than 242688 (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: fb4a2759-1b2e-5ff5-b378-bcca574f0870

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