YARA · Malpedia signator rules
MALPEDIA_Win_Zenar_Auto
autogenerated rule brought to you by yara-signator
- 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: Zenar.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-zenar-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Zenar_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "15f4f19e-93d0-543d-b13f-3732f71299df"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.zenar"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.zenar_auto.yar#L1-L128"
= "N/A"
= "12fedde670fd3740a00bd9e0c9f8d52e18015072cb065854a4696b910eb92176"
= 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 = { 85c9 740c 8b01 51 ff5008 899f90000000 }
$sequence_1 = { e8???????? 83c420 8bf0 c645fc02 ffd7 50 56 }
$sequence_2 = { 83e801 0f8595010000 c745e484cc4200 e9???????? 894de0 c745e484cc4200 e9???????? }
$sequence_3 = { 8935???????? 8935???????? e8???????? 8b45ec c705????????03000000 c705????????24000000 }
$sequence_4 = { 8944242c ff15???????? 6800040000 8bf0 8d84248c040000 6a00 50 }
$sequence_5 = { ff7514 e8???????? 59 c9 c21400 55 }
$sequence_6 = { 68???????? c785b8f7ffff00000000 c785bcf7ffff0f000000 c685a8f7ffff00 }
$sequence_7 = { 85f6 750a 8bc7 e8???????? c20c00 8d45d8 53 }
$sequence_8 = { 83c420 8bf0 c645fc05 ffd7 50 56 8d8d40ffffff }
$sequence_9 = { 33c0 c785c0feffff00000000 68???????? c785c4feffff07000000 668985b0feffff e8???????? 8d8580feffff }
condition:
7 of them and filesize < 519168
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 85c9 740c 8b01 51 ff5008 899f90000000 } | |
| $sequence_1 | hex | { e8???????? 83c420 8bf0 c645fc02 ffd7 50 56 } | |
| $sequence_2 | hex | { 83e801 0f8595010000 c745e484cc4200 e9???????? 894de0 c745e484cc4200 e9???????? } | |
| $sequence_3 | hex | { 8935???????? 8935???????? e8???????? 8b45ec c705????????03000000 c705????????24000000 } | |
| $sequence_4 | hex | { 8944242c ff15???????? 6800040000 8bf0 8d84248c040000 6a00 50 } | |
| $sequence_5 | hex | { ff7514 e8???????? 59 c9 c21400 55 } | |
| $sequence_6 | hex | { 68???????? c785b8f7ffff00000000 c785bcf7ffff0f000000 c685a8f7ffff00 } | |
| $sequence_7 | hex | { 85f6 750a 8bc7 e8???????? c20c00 8d45d8 53 } | |
| $sequence_8 | hex | { 83c420 8bf0 c645fc05 ffd7 50 56 8d8d40ffffff } | |
| $sequence_9 | hex | { 33c0 c785c0feffff00000000 68???????? c785c4feffff07000000 668985b0feffff e8???????? 8d8580feffff } |
Condition
7 of them and filesize < 519168In plain words (Heuristic)
- The file must be smaller than 519168 (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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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: 15f4f19e-93d0-543d-b13f-3732f71299df
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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