YARA · Malpedia signator rules
MALPEDIA_Win_Rokku_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: Rokku.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-rokku-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rokku_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "a5feb178-c735-508e-a0f8-0bfcbe692e7b"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.rokku"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rokku_auto.yar#L1-L128"
= "N/A"
= "e2bf74104beac743ec38bdbe73eb38f6365a43d5359a716e4280a8e578384cb8"
= 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 = { 8bcf 0facc808 33d2 c1e618 0bd0 c1e908 }
$sequence_1 = { 53 bfe9fd0000 8bf2 57 }
$sequence_2 = { 0f85e3feffff 8b7c2424 8d442430 33d2 52 52 }
$sequence_3 = { f76c2438 03e8 8b442474 13da f76c2448 03e8 13da }
$sequence_4 = { 8b44240c 56 8b721c 57 8b4824 f7de }
$sequence_5 = { 7509 83433801 7503 ff433c 5f 5e 5d }
$sequence_6 = { 0facf919 8bea ba42db0100 c1ff19 897c2430 8bf8 8b442410 }
$sequence_7 = { f76c2438 898c24c0000000 8bf8 8bea 8b44246c f76c2460 03f8 }
$sequence_8 = { 8b442468 894d18 8b4c2418 0fa4c119 8b4c244c c1e019 2bf8 }
$sequence_9 = { 397218 744c 8b5a30 8be9 0fbe7d00 45 0fb70b }
condition:
7 of them and filesize < 548864
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 8bcf 0facc808 33d2 c1e618 0bd0 c1e908 } | |
| $sequence_1 | hex | { 53 bfe9fd0000 8bf2 57 } | |
| $sequence_2 | hex | { 0f85e3feffff 8b7c2424 8d442430 33d2 52 52 } | |
| $sequence_3 | hex | { f76c2438 03e8 8b442474 13da f76c2448 03e8 13da } | |
| $sequence_4 | hex | { 8b44240c 56 8b721c 57 8b4824 f7de } | |
| $sequence_5 | hex | { 7509 83433801 7503 ff433c 5f 5e 5d } | |
| $sequence_6 | hex | { 0facf919 8bea ba42db0100 c1ff19 897c2430 8bf8 8b442410 } | |
| $sequence_7 | hex | { f76c2438 898c24c0000000 8bf8 8bea 8b44246c f76c2460 03f8 } | |
| $sequence_8 | hex | { 8b442468 894d18 8b4c2418 0fa4c119 8b4c244c c1e019 2bf8 } | |
| $sequence_9 | hex | { 397218 744c 8b5a30 8be9 0fbe7d00 45 0fb70b } |
Condition
7 of them and filesize < 548864In plain words (Heuristic)
- The file must be smaller than 548864 (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: a5feb178-c735-508e-a0f8-0bfcbe692e7b
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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