Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Latrodectus_Auto

autogenerated rule brought to you by yara-signator

MalwareLatrodectusMalpedia 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: Latrodectus.

It defines 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-latrodectus-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Latrodectus_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2928dfe2-85b2-58d3-a666-1ead3df853ac"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.latrodectus"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.latrodectus_auto.yar#L1-L178"
		license_url = "N/A"
		logic_hash = "79e5ef3590e1035aa82cbf55521fc9e78790fc9555e1c31b8423a3b8d2baaa49"
		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 = { 488b8c2448010000 480301 448b442420 488d542430 488bc8 e8???????? }
		$sequence_1 = { 488b542460 488d8c24f0010000 ff15???????? 488d442468 4889442448 488d842480010000 }
		$sequence_2 = { 8b442420 4839442448 7308 8b442448 89442420 448b442420 }
		$sequence_3 = { eb0d 488d842480000000 4889442458 b808000000 486bc000 488b542458 }
		$sequence_4 = { 880424 4863442430 48634c2428 488b542420 4c8b442420 418a0400 }
		$sequence_5 = { 8b00 488b4c2430 488b09 c6040100 48630424 488b4c2430 }
		$sequence_6 = { 488b442440 48638004010000 488b4c2440 0fb60401 488b4c2440 8b8908010000 }
		$sequence_7 = { 0fbf440438 c1e006 b902000000 486bc903 0fbf4c0c38 0bc1 }
		$sequence_8 = { 4883fa0f 7630 48ffc2 488b4d17 488bc1 4881fa00100000 }
		$sequence_9 = { 0f1145e0 0f1145f0 48894500 41b8ffff1f00 488d55d0 488bcb }
		$sequence_10 = { 4180397d 752b 49ffc1 498bc1 4883c428 c3 }
		$sequence_11 = { 488901 488bc1 c3 488d05cc700b00 48c7410802000000 488901 }
		$sequence_12 = { 410fb6fa 41be04000000 41b470 eb47 410fb6fa b806000000 }
		$sequence_13 = { 480fafc2 480faf542428 4c03e0 48d3eb 49d3ec 4803fa }
		$sequence_14 = { 4883ec60 488b05???????? 4833c4 4889442458 4d8bf1 498bd8 }
		$sequence_15 = { 448bc3 8bda 41f7e0 418bc3 4183c304 482bc8 }

	condition:
		7 of them and filesize < 2467840
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 488b8c2448010000 480301 448b442420 488d542430 488bc8 e8???????? }
$sequence_1hex{ 488b542460 488d8c24f0010000 ff15???????? 488d442468 4889442448 488d842480010000 }
$sequence_2hex{ 8b442420 4839442448 7308 8b442448 89442420 448b442420 }
$sequence_3hex{ eb0d 488d842480000000 4889442458 b808000000 486bc000 488b542458 }
$sequence_4hex{ 880424 4863442430 48634c2428 488b542420 4c8b442420 418a0400 }
$sequence_5hex{ 8b00 488b4c2430 488b09 c6040100 48630424 488b4c2430 }
$sequence_6hex{ 488b442440 48638004010000 488b4c2440 0fb60401 488b4c2440 8b8908010000 }
$sequence_7hex{ 0fbf440438 c1e006 b902000000 486bc903 0fbf4c0c38 0bc1 }
$sequence_8hex{ 4883fa0f 7630 48ffc2 488b4d17 488bc1 4881fa00100000 }
$sequence_9hex{ 0f1145e0 0f1145f0 48894500 41b8ffff1f00 488d55d0 488bcb }
$sequence_10hex{ 4180397d 752b 49ffc1 498bc1 4883c428 c3 }
$sequence_11hex{ 488901 488bc1 c3 488d05cc700b00 48c7410802000000 488901 }
$sequence_12hex{ 410fb6fa 41be04000000 41b470 eb47 410fb6fa b806000000 }
$sequence_13hex{ 480fafc2 480faf542428 4c03e0 48d3eb 49d3ec 4803fa }
$sequence_14hex{ 4883ec60 488b05???????? 4833c4 4889442458 4d8bf1 498bd8 }
$sequence_15hex{ 448bc3 8bda 41f7e0 418bc3 4183c304 482bc8 }

Condition

7 of them and filesize < 2467840

In plain words (Heuristic)

  • The file must be smaller than 2467840 (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: 2928dfe2-85b2-58d3-a666-1ead3df853ac

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

More Latrodectus rules