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MALPEDIA_Win_Acbackdoor_Auto

autogenerated rule brought to you by yara-signator

MalwareAcbackdoorMalpedia 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: Acbackdoor.

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

Summary generated from the rule's metadata and condition.

Rule source

win-acbackdoor-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Acbackdoor_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "bf831c0d-2cd2-5387-85a5-889ddbb43279"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.acbackdoor"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.acbackdoor_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "5aa3c90498f903a2c571d2af12d774a6a5d8ab44b83ae199544fc3b7d1065a5a"
		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 = { c744240c801e4b00 89742408 89442404 c70424???????? e8???????? e9???????? 8b842408020000 }
		$sequence_1 = { 89c1 c1e918 0fca 88633a 884b38 89c1 c1e910 }
		$sequence_2 = { 8b4c2448 8d742448 894844 8b7c242c 8b4c3c44 894c3afc 8d4848 }
		$sequence_3 = { e8???????? 85c0 7594 896c2404 893424 e8???????? c744240448000000 }
		$sequence_4 = { c70000000000 85d2 743f 31db bf80ffffff 31c0 90 }
		$sequence_5 = { 8b07 31db 8986f8050000 e9???????? 8b2f 8bbef0090000 85ed }
		$sequence_6 = { c7831c060000c8000000 c783140a000000000000 c783440a000060ea0000 c783280a000005000000 c7832406000076000000 818b5c0a000010000040 c7830008000002000000 }
		$sequence_7 = { e8???????? c7442404???????? 89442408 891c24 e8???????? e9???????? e8???????? }
		$sequence_8 = { c744240800000000 897c2404 e8???????? 89c3 85c0 7589 c70424???????? }
		$sequence_9 = { c744240c2b0c0000 c7442408???????? c744240401000000 891c24 e8???????? e9???????? c6400700 }

	condition:
		7 of them and filesize < 1704960
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c744240c801e4b00 89742408 89442404 c70424???????? e8???????? e9???????? 8b842408020000 }
$sequence_1hex{ 89c1 c1e918 0fca 88633a 884b38 89c1 c1e910 }
$sequence_2hex{ 8b4c2448 8d742448 894844 8b7c242c 8b4c3c44 894c3afc 8d4848 }
$sequence_3hex{ e8???????? 85c0 7594 896c2404 893424 e8???????? c744240448000000 }
$sequence_4hex{ c70000000000 85d2 743f 31db bf80ffffff 31c0 90 }
$sequence_5hex{ 8b07 31db 8986f8050000 e9???????? 8b2f 8bbef0090000 85ed }
$sequence_6hex{ c7831c060000c8000000 c783140a000000000000 c783440a000060ea0000 c783280a000005000000 c7832406000076000000 818b5c0a000010000040 c7830008000002000000 }
$sequence_7hex{ e8???????? c7442404???????? 89442408 891c24 e8???????? e9???????? e8???????? }
$sequence_8hex{ c744240800000000 897c2404 e8???????? 89c3 85c0 7589 c70424???????? }
$sequence_9hex{ c744240c2b0c0000 c7442408???????? c744240401000000 891c24 e8???????? e9???????? c6400700 }

Condition

7 of them and filesize < 1704960

In plain words (Heuristic)

  • The file must be smaller than 1704960 (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: bf831c0d-2cd2-5387-85a5-889ddbb43279

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