YARA · Malpedia signator rules
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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "75c91c8f-660c-5fd9-8ded-04a7820bc535"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.zeus_openssl"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zeus_openssl_auto.yar#L1-L122"
= "N/A"
= "e7fd00690390e7987498d7d27486b95194c61ca2651f4f0e4767f4d9ca928e08"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 745a 837b4000 7454 837b4400 744e 85d2 } | |
| $sequence_1 | hex | { 8bf9 8b8fbc160000 83f90d 7e52 8b5708 56 } | |
| $sequence_2 | hex | { 85d2 744a 8bc6 d1e8 8bcf 8d0442 8983a4160000 } | |
| $sequence_3 | hex | { 0f8547160000 83390b 7506 c7010c000000 8b500c } | |
| $sequence_4 | hex | { 2bf0 0181c41b0000 8955f8 8b4140 8981c81b0000 c70116000000 } | |
| $sequence_5 | hex | { 83feff 750a 8b1d???????? 33f6 eb03 } | |
| $sequence_6 | hex | { 83c608 03d0 895dfc 8955f8 897df0 3b75cc 72dc } | |
| $sequence_7 | hex | { 0f84c0000000 0fb74014 8b4e14 894d08 } | |
| $sequence_8 | hex | { 6a01 50 8bce e8???????? 8b466c } | |
| $sequence_9 | hex | { 726d 8b8ea0160000 8b86a4160000 8a5660 bf01000000 66893c48 8b86a0160000 } |
Condition
7 of them and filesize < 4546560In 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.
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)
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
| 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 |
Tags:FILE
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