YARA · Malpedia signator rules
MALPEDIA_Win_Imprudentcook_Auto
autogenerated rule brought to you by yara-signator
MalwareImprudentcookMalpedia 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: Imprudentcook.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-imprudentcook-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Imprudentcook_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "75e4592d-21ea-5b74-beda-d75f8caa17c5"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.imprudentcook"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.imprudentcook_auto.yar#L1-L133"
= "N/A"
= "74810614a85d779678d01380c3bcf3dcf793e759fae3ba5e3f5874f62d02ccb3"
= 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 = { e8???????? 488b5520 894500 8b4528 83f803 7527 488b4508 }
$sequence_1 = { 3b3d???????? 736e 488bdf 4c8bef 49c1fd05 4c8d35384d0200 83e31f }
$sequence_2 = { 753a 4883e908 48ffc8 79eb 488b8c2498000000 4489642428 4d85f6 }
$sequence_3 = { 4c2bc1 49c1e020 4d0bc3 4c3bc2 731a 498b45f8 49ffca }
$sequence_4 = { 4983ec08 493bfd 0f8211020000 4989742408 7732 7563 4d8bcc }
$sequence_5 = { 4b0104ec 4d85f6 7430 488b4d28 4d8d46ff 498bc4 }
$sequence_6 = { 482bfa 660f1f440000 488b0c3b 488b13 483bca 0f8599000000 4883eb08 }
$sequence_7 = { 4c8bc6 48898580000000 e8???????? 48894510 4885c0 7452 660f1f840000000000 }
$sequence_8 = { 4c8b7c2460 4c8b942408010000 4a8d1c38 4f8d2c12 493bdd 7d41 488b842438010000 }
$sequence_9 = { 488905???????? e8???????? 488d15d3ec0400 488bcb 488905???????? e8???????? 488d15d5ec0400 }
condition:
7 of them and filesize < 864256
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? 488b5520 894500 8b4528 83f803 7527 488b4508 } | |
| $sequence_1 | hex | { 3b3d???????? 736e 488bdf 4c8bef 49c1fd05 4c8d35384d0200 83e31f } | |
| $sequence_2 | hex | { 753a 4883e908 48ffc8 79eb 488b8c2498000000 4489642428 4d85f6 } | |
| $sequence_3 | hex | { 4c2bc1 49c1e020 4d0bc3 4c3bc2 731a 498b45f8 49ffca } | |
| $sequence_4 | hex | { 4983ec08 493bfd 0f8211020000 4989742408 7732 7563 4d8bcc } | |
| $sequence_5 | hex | { 4b0104ec 4d85f6 7430 488b4d28 4d8d46ff 498bc4 } | |
| $sequence_6 | hex | { 482bfa 660f1f440000 488b0c3b 488b13 483bca 0f8599000000 4883eb08 } | |
| $sequence_7 | hex | { 4c8bc6 48898580000000 e8???????? 48894510 4885c0 7452 660f1f840000000000 } | |
| $sequence_8 | hex | { 4c8b7c2460 4c8b942408010000 4a8d1c38 4f8d2c12 493bdd 7d41 488b842438010000 } | |
| $sequence_9 | hex | { 488905???????? e8???????? 488d15d3ec0400 488bcb 488905???????? e8???????? 488d15d5ec0400 } |
Condition
7 of them and filesize < 864256In plain words (Heuristic)
- The file must be smaller than 864256 (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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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.
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: 75e4592d-21ea-5b74-beda-d75f8caa17c5
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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