YARA · Malpedia signator rules
MALPEDIA_Win_Rook_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: Rook.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-rook-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Rook_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "7e9a00fa-9e37-5ee8-b49d-e7d22fd8a3c0"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.rook"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.rook_auto.yar#L1-L123"
= "N/A"
= "4f6e306547a8e1ee48d3e89d6bd542536f9fe68149b73057a1b43a088743f030"
= 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 = { eb07 488d1d1a030200 4883a4249800000000 4084f6 }
$sequence_1 = { 33d2 33c9 448d4207 ff15???????? 488d4c2440 ff15???????? 8b442460 }
$sequence_2 = { 488bd3 4533c0 498bcc ff15???????? }
$sequence_3 = { 488d0dbebb0400 4c89642420 e8???????? 498bcd ff15???????? 448bc0 8905???????? }
$sequence_4 = { 488987a8000000 488d05749c0200 c7879800000001000000 48c787a000000004000000 48894760 488d055c990200 }
$sequence_5 = { 4883eb01 7582 4183c9ff 41b801000000 498bd4 8bcf ff15???????? }
$sequence_6 = { 48897c2420 ff15???????? 4863d8 488bcb e8???????? 498bce }
$sequence_7 = { c5f1eb0d???????? 4c8d0d169f0000 c5f35cca c4c173590cc1 4c8d0de58e0000 }
$sequence_8 = { 7407 e8???????? eb09 488b4918 e8???????? ffc3 }
$sequence_9 = { 488d54246c 488bcd ff15???????? f644244010 0f851f020000 488d153bab0400 488d4c246c }
condition:
7 of them and filesize < 843776
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { eb07 488d1d1a030200 4883a4249800000000 4084f6 } | |
| $sequence_1 | hex | { 33d2 33c9 448d4207 ff15???????? 488d4c2440 ff15???????? 8b442460 } | |
| $sequence_2 | hex | { 488bd3 4533c0 498bcc ff15???????? } | |
| $sequence_3 | hex | { 488d0dbebb0400 4c89642420 e8???????? 498bcd ff15???????? 448bc0 8905???????? } | |
| $sequence_4 | hex | { 488987a8000000 488d05749c0200 c7879800000001000000 48c787a000000004000000 48894760 488d055c990200 } | |
| $sequence_5 | hex | { 4883eb01 7582 4183c9ff 41b801000000 498bd4 8bcf ff15???????? } | |
| $sequence_6 | hex | { 48897c2420 ff15???????? 4863d8 488bcb e8???????? 498bce } | |
| $sequence_7 | hex | { c5f1eb0d???????? 4c8d0d169f0000 c5f35cca c4c173590cc1 4c8d0de58e0000 } | |
| $sequence_8 | hex | { 7407 e8???????? eb09 488b4918 e8???????? ffc3 } | |
| $sequence_9 | hex | { 488d54246c 488bcd ff15???????? f644244010 0f851f020000 488d153bab0400 488d4c246c } |
Condition
7 of them and filesize < 843776In plain words (Heuristic)
- The file must be smaller than 843776 (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: 7e9a00fa-9e37-5ee8-b49d-e7d22fd8a3c0
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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