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MALPEDIA_Win_Zeus_Openssl_Auto

autogenerated rule brought to you by yara-signator

MalwareZeus OpensslMalpedia 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: Zeus Openssl.

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

Summary generated from the rule's metadata and condition.

Rule source

win-zeus-openssl-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Zeus_Openssl_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "75c91c8f-660c-5fd9-8ded-04a7820bc535"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.zeus_openssl"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zeus_openssl_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "e7fd00690390e7987498d7d27486b95194c61ca2651f4f0e4767f4d9ca928e08"
		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 = { 745a 837b4000 7454 837b4400 744e 85d2 }
		$sequence_1 = { 8bf9 8b8fbc160000 83f90d 7e52 8b5708 56 }
		$sequence_2 = { 85d2 744a 8bc6 d1e8 8bcf 8d0442 8983a4160000 }
		$sequence_3 = { 0f8547160000 83390b 7506 c7010c000000 8b500c }
		$sequence_4 = { 2bf0 0181c41b0000 8955f8 8b4140 8981c81b0000 c70116000000 }
		$sequence_5 = { 83feff 750a 8b1d???????? 33f6 eb03 }
		$sequence_6 = { 83c608 03d0 895dfc 8955f8 897df0 3b75cc 72dc }
		$sequence_7 = { 0f84c0000000 0fb74014 8b4e14 894d08 }
		$sequence_8 = { 6a01 50 8bce e8???????? 8b466c }
		$sequence_9 = { 726d 8b8ea0160000 8b86a4160000 8a5660 bf01000000 66893c48 8b86a0160000 }

	condition:
		7 of them and filesize < 4546560
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 745a 837b4000 7454 837b4400 744e 85d2 }
$sequence_1hex{ 8bf9 8b8fbc160000 83f90d 7e52 8b5708 56 }
$sequence_2hex{ 85d2 744a 8bc6 d1e8 8bcf 8d0442 8983a4160000 }
$sequence_3hex{ 0f8547160000 83390b 7506 c7010c000000 8b500c }
$sequence_4hex{ 2bf0 0181c41b0000 8955f8 8b4140 8981c81b0000 c70116000000 }
$sequence_5hex{ 83feff 750a 8b1d???????? 33f6 eb03 }
$sequence_6hex{ 83c608 03d0 895dfc 8955f8 897df0 3b75cc 72dc }
$sequence_7hex{ 0f84c0000000 0fb74014 8b4e14 894d08 }
$sequence_8hex{ 6a01 50 8bce e8???????? 8b466c }
$sequence_9hex{ 726d 8b8ea0160000 8b86a4160000 8a5660 bf01000000 66893c48 8b86a0160000 }

Condition

7 of them and filesize < 4546560

In plain words (Heuristic)

  • The file must be smaller than 4546560 (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.

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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: 75c91c8f-660c-5fd9-8ded-04a7820bc535

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