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MALPEDIA_Win_Atharvan_Auto

autogenerated rule brought to you by yara-signator

MalwareAtharvanMalpedia 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: Atharvan.

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

Summary generated from the rule's metadata and condition.

Rule source

win-atharvan-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Atharvan_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "dd431719-94ae-5231-a751-29bdaf0704ba"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.atharvan"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.atharvan_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "19e37c8e9adb39c411ba39c49044a47b42d2c1f02c40c66504cd4acf945815d9"
		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 = { f6d1 80c103 8848ff 4883ea01 75eb 448b8504010000 488bd5 }
		$sequence_1 = { 4885c0 7441 48c7c1ffffffff 0f1f4000 48ffc1 803c0800 }
		$sequence_2 = { 895128 488d0d9fc10000 488b45d8 488908 488d0d915b0100 488b45d8 }
		$sequence_3 = { 0fb601 84c0 75f1 488d4c2468 b0c2 }
		$sequence_4 = { 48c1f806 4c8d0504f50000 83e23f 488d14d2 498b04c0 f644d03801 7424 }
		$sequence_5 = { ff15???????? 85c0 0f842f010000 b901001000 }
		$sequence_6 = { 488b08 488d05b8330100 483901 7408 488b09 e8???????? 488b03 }
		$sequence_7 = { ff15???????? 488bd8 4883f8ff 742b 448d460e 488bc8 }
		$sequence_8 = { 4533d2 498bd2 4885ff 7e1f 4c8d05179dfeff 4b8b8ce070550200 }
		$sequence_9 = { 458be0 c7442469cf968ed8 4c8bea c744246d8dc8c4cf }

	condition:
		7 of them and filesize < 348160
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ f6d1 80c103 8848ff 4883ea01 75eb 448b8504010000 488bd5 }
$sequence_1hex{ 4885c0 7441 48c7c1ffffffff 0f1f4000 48ffc1 803c0800 }
$sequence_2hex{ 895128 488d0d9fc10000 488b45d8 488908 488d0d915b0100 488b45d8 }
$sequence_3hex{ 0fb601 84c0 75f1 488d4c2468 b0c2 }
$sequence_4hex{ 48c1f806 4c8d0504f50000 83e23f 488d14d2 498b04c0 f644d03801 7424 }
$sequence_5hex{ ff15???????? 85c0 0f842f010000 b901001000 }
$sequence_6hex{ 488b08 488d05b8330100 483901 7408 488b09 e8???????? 488b03 }
$sequence_7hex{ ff15???????? 488bd8 4883f8ff 742b 448d460e 488bc8 }
$sequence_8hex{ 4533d2 498bd2 4885ff 7e1f 4c8d05179dfeff 4b8b8ce070550200 }
$sequence_9hex{ 458be0 c7442469cf968ed8 4c8bea c744246d8dc8c4cf }

Condition

7 of them and filesize < 348160

In plain words (Heuristic)

  • The file must be smaller than 348160 (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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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: dd431719-94ae-5231-a751-29bdaf0704ba

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

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