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MALPEDIA_Win_Bachosens_Auto

autogenerated rule brought to you by yara-signator

MalwareBachosensMalpedia 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: Bachosens.

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

Summary generated from the rule's metadata and condition.

Rule source

win-bachosens-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Bachosens_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "c3ae17b5-5204-5f65-af31-702850596b5b"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.bachosens"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.bachosens_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "4bd1a35420cf40962f926575072382f9bc014a7da3c2700bbf3154843f1f8630"
		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 = { 4d8b5310 49895b18 498973d8 49897bd0 4d896bc8 448be8 }
		$sequence_1 = { 8d419f 3c19 7703 80c1e0 3ad1 7515 }
		$sequence_2 = { 33c9 84db 740f 488bc7 90 }
		$sequence_3 = { 4b8d0401 493bc2 7cd3 488935???????? 4c8b542458 }
		$sequence_4 = { c3 48891c24 4d63d0 4585c0 7e3d 4c2bda bbe0ff0000 }
		$sequence_5 = { 66443908 75f4 443bc1 740a b801000000 4883c408 }
		$sequence_6 = { 8b442420 ffc0 89442420 4863442420 b944000000 }
		$sequence_7 = { 660f1f840000000000 410fb707 418b3e 6603c1 4803f9 0fb7c0 }
		$sequence_8 = { 488d4001 803800 75f5 33d2 385500 740e }
		$sequence_9 = { 0fb61f 4803f1 84db 740e 488bc7 ffc2 }

	condition:
		7 of them and filesize < 643072
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 4d8b5310 49895b18 498973d8 49897bd0 4d896bc8 448be8 }
$sequence_1hex{ 8d419f 3c19 7703 80c1e0 3ad1 7515 }
$sequence_2hex{ 33c9 84db 740f 488bc7 90 }
$sequence_3hex{ 4b8d0401 493bc2 7cd3 488935???????? 4c8b542458 }
$sequence_4hex{ c3 48891c24 4d63d0 4585c0 7e3d 4c2bda bbe0ff0000 }
$sequence_5hex{ 66443908 75f4 443bc1 740a b801000000 4883c408 }
$sequence_6hex{ 8b442420 ffc0 89442420 4863442420 b944000000 }
$sequence_7hex{ 660f1f840000000000 410fb707 418b3e 6603c1 4803f9 0fb7c0 }
$sequence_8hex{ 488d4001 803800 75f5 33d2 385500 740e }
$sequence_9hex{ 0fb61f 4803f1 84db 740e 488bc7 ffc2 }

Condition

7 of them and filesize < 643072

In plain words (Heuristic)

  • The file must be smaller than 643072 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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Open in editor

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: c3ae17b5-5204-5f65-af31-702850596b5b

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