YARA · Malpedia signator rules
MALPEDIA_Win_Varenyky_Auto
autogenerated rule brought to you by yara-signator
MalwareVarenykyMalpedia 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: Varenyky.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-varenyky-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Varenyky_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "b02c2a5a-b676-50b6-aaf1-69e32b01ea2f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.varenyky"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.varenyky_auto.yar#L1-L121"
= "N/A"
= "5b941a9b54248f9dae43db0241b815af9c7b007835bd2ee5ac23d33ed795c82c"
= 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 = { 6803010000 8d4c244d 6a00 51 c644245400 }
$sequence_1 = { 6803010000 8d842485020000 53 50 889c248c020000 e8???????? }
$sequence_2 = { 399c24ec0a0000 7417 8d8c24d0000000 51 68???????? 8d9424e0010000 }
$sequence_3 = { 8b03 50 55 ffd6 85c0 0f8eb5010000 8b3d???????? }
$sequence_4 = { 8945e4 83f805 7d10 668b4c4310 66890c45ac0bfd00 }
$sequence_5 = { 56 e8???????? 8bc6 c1f805 8b0485401efd00 83e61f }
$sequence_6 = { 5e 33cc e8???????? 81c47c020000 c3 be???????? 8bd7 }
$sequence_7 = { 50 68???????? 8d8c24e0010000 51 e8???????? }
$sequence_8 = { 6830750000 50 ff15???????? 8b4c2410 51 }
$sequence_9 = { 7e09 8bce e8???????? eb0b 6860ea0000 }
condition:
7 of them and filesize < 24846336
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 6803010000 8d4c244d 6a00 51 c644245400 } | |
| $sequence_1 | hex | { 6803010000 8d842485020000 53 50 889c248c020000 e8???????? } | |
| $sequence_2 | hex | { 399c24ec0a0000 7417 8d8c24d0000000 51 68???????? 8d9424e0010000 } | |
| $sequence_3 | hex | { 8b03 50 55 ffd6 85c0 0f8eb5010000 8b3d???????? } | |
| $sequence_4 | hex | { 8945e4 83f805 7d10 668b4c4310 66890c45ac0bfd00 } | |
| $sequence_5 | hex | { 56 e8???????? 8bc6 c1f805 8b0485401efd00 83e61f } | |
| $sequence_6 | hex | { 5e 33cc e8???????? 81c47c020000 c3 be???????? 8bd7 } | |
| $sequence_7 | hex | { 50 68???????? 8d8c24e0010000 51 e8???????? } | |
| $sequence_8 | hex | { 6830750000 50 ff15???????? 8b4c2410 51 } | |
| $sequence_9 | hex | { 7e09 8bce e8???????? eb0b 6860ea0000 } |
Condition
7 of them and filesize < 24846336In plain words (Heuristic)
- The file must be smaller than 24846336 (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: b02c2a5a-b676-50b6-aaf1-69e32b01ea2f
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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