YARA · Malpedia signator rules
MALPEDIA_Win_Zebrocy_Auto
autogenerated rule brought to you by yara-signator
MalwareZebrocyMalpedia 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: Zebrocy.
It defines 16 patterns (0 text, 16 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-zebrocy-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Zebrocy_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "0c26eaee-ceca-571b-b5d3-25fb9badb48b"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.zebrocy"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zebrocy_auto.yar#L1-L167"
= "N/A"
= "89617f1d3dcb35789544bd09fa73885d6783a0c2248e99f8d5ce1abc3cd36b06"
= 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 = { 8bf3 e8???????? c645fc00 837dd410 720c 8b4dc0 51 }
$sequence_1 = { 56 53 83ec0c 837d0800 7e3a }
$sequence_2 = { 55 ba???????? b9???????? 89e5 83ec08 e8???????? }
$sequence_3 = { 8bf3 c745fc01000000 e8???????? 837db010 0f8291020000 8b459c }
$sequence_4 = { 66891478 8bc6 5f c3 8bff }
$sequence_5 = { c705????????50c34100 c705????????43f74000 c705????????02000000 c605????????02 }
$sequence_6 = { 8b55ec 33ff 897c1820 897c1824 }
$sequence_7 = { 884dc8 8a4c3b0a 83c703 8975b4 c1ee02 884db8 }
$sequence_8 = { 897e10 897e14 837dd410 720c }
$sequence_9 = { 8b4a04 8b55ec 03cb 85d2 7420 8b410c }
$sequence_10 = { c705????????04000000 c605????????16 c705????????a4c34100 c605????????02 c705????????01000000 }
$sequence_11 = { 83e13f 8a89e8f64000 884c100b 8b4de0 394ddc 7e08 }
$sequence_12 = { 7409 c745e400000000 eb53 31d2 }
$sequence_13 = { 8d8508f7ffff 8a1c38 8db598f6ffff e8???????? }
$sequence_14 = { 83e71f c1e706 8b0485c0a84200 8d44380c 50 ff15???????? 8b45e4 }
$sequence_15 = { 31db 84d2 742f 39c3 0f9ec2 7f21 }
condition:
7 of them and filesize < 393216
}
Strings (16 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8bf3 e8???????? c645fc00 837dd410 720c 8b4dc0 51 } | |
| $sequence_1 | hex | { 56 53 83ec0c 837d0800 7e3a } | |
| $sequence_2 | hex | { 55 ba???????? b9???????? 89e5 83ec08 e8???????? } | |
| $sequence_3 | hex | { 8bf3 c745fc01000000 e8???????? 837db010 0f8291020000 8b459c } | |
| $sequence_4 | hex | { 66891478 8bc6 5f c3 8bff } | |
| $sequence_5 | hex | { c705????????50c34100 c705????????43f74000 c705????????02000000 c605????????02 } | |
| $sequence_6 | hex | { 8b55ec 33ff 897c1820 897c1824 } | |
| $sequence_7 | hex | { 884dc8 8a4c3b0a 83c703 8975b4 c1ee02 884db8 } | |
| $sequence_8 | hex | { 897e10 897e14 837dd410 720c } | |
| $sequence_9 | hex | { 8b4a04 8b55ec 03cb 85d2 7420 8b410c } | |
| $sequence_10 | hex | { c705????????04000000 c605????????16 c705????????a4c34100 c605????????02 c705????????01000000 } | |
| $sequence_11 | hex | { 83e13f 8a89e8f64000 884c100b 8b4de0 394ddc 7e08 } | |
| $sequence_12 | hex | { 7409 c745e400000000 eb53 31d2 } | |
| $sequence_13 | hex | { 8d8508f7ffff 8a1c38 8db598f6ffff e8???????? } | |
| $sequence_14 | hex | { 83e71f c1e706 8b0485c0a84200 8d44380c 50 ff15???????? 8b45e4 } | |
| $sequence_15 | hex | { 31db 84d2 742f 39c3 0f9ec2 7f21 } |
Condition
7 of them and filesize < 393216In plain words (Heuristic)
- The file must be smaller than 393216 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
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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: 0c26eaee-ceca-571b-b5d3-25fb9badb48b
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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