Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Yibackdoor_Auto

autogenerated rule brought to you by yara-signator

MalwareYibackdoorMalpedia 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: Yibackdoor.

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

Summary generated from the rule's metadata and condition.

Rule source

win-yibackdoor-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Yibackdoor_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "8381ad3f-144e-57bf-b1e0-596a16631421"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.yibackdoor"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.yibackdoor_auto.yar#L1-L133"
		license_url = "N/A"
		logic_hash = "d1e046cc1b955a806f4fd0e827829722c6add56dbc28052f2824eed9e402f3f3"
		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 = { 84c9 75ef 458b4c1820 4d8bd8 418b741814 4c03cb 458bd6 }
		$sequence_1 = { 418bd6 ffd0 3d02010000 752b 488b4d90 33d2 ff15???????? }
		$sequence_2 = { 4883ec30 488bfa 418bf0 33d2 4c8bf1 33c9 }
		$sequence_3 = { 488d4da0 33d2 e8???????? 33d2 895da0 33c9 448d4baa }
		$sequence_4 = { 7406 8b4028 8945d7 44887c2420 c74424244632b25f c74424285f30c738 8b442424 }
		$sequence_5 = { 488bc1 4885c9 7505 c3 4883c102 663911 75f7 }
		$sequence_6 = { 488b15???????? 4803d7 48895110 488b09 e8???????? 488903 48897b08 }
		$sequence_7 = { c74513ac2aba60 895517 4489451b 89451f 895523 44894527 89452b }
		$sequence_8 = { e8???????? 488bd0 488d4c2438 e8???????? 488b4c2468 e8???????? 40887c2420 }
		$sequence_9 = { 0f31 48c1e220 480bc2 8905???????? 488bcb 6901fd430300 bfc39e2600 }

	condition:
		7 of them and filesize < 147456
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 84c9 75ef 458b4c1820 4d8bd8 418b741814 4c03cb 458bd6 }
$sequence_1hex{ 418bd6 ffd0 3d02010000 752b 488b4d90 33d2 ff15???????? }
$sequence_2hex{ 4883ec30 488bfa 418bf0 33d2 4c8bf1 33c9 }
$sequence_3hex{ 488d4da0 33d2 e8???????? 33d2 895da0 33c9 448d4baa }
$sequence_4hex{ 7406 8b4028 8945d7 44887c2420 c74424244632b25f c74424285f30c738 8b442424 }
$sequence_5hex{ 488bc1 4885c9 7505 c3 4883c102 663911 75f7 }
$sequence_6hex{ 488b15???????? 4803d7 48895110 488b09 e8???????? 488903 48897b08 }
$sequence_7hex{ c74513ac2aba60 895517 4489451b 89451f 895523 44894527 89452b }
$sequence_8hex{ e8???????? 488bd0 488d4c2438 e8???????? 488b4c2468 e8???????? 40887c2420 }
$sequence_9hex{ 0f31 48c1e220 480bc2 8905???????? 488bcb 6901fd430300 bfc39e2600 }

Condition

7 of them and filesize < 147456

In plain words (Heuristic)

  • The file must be smaller than 147456 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

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: 8381ad3f-144e-57bf-b1e0-596a16631421

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