YARA · Malpedia signator rules
MALPEDIA_Win_Grimplant_Auto
autogenerated rule brought to you by yara-signator
MalwareGrimplantMalpedia 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: Grimplant.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-grimplant-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Grimplant_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "b646bda4-ba63-534d-b90e-bc37d2891c7f"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.grimplant"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.grimplant_auto.yar#L1-L134"
= "N/A"
= "3bcf70c420714a855a299c19c4ff6823f81d3e2bec3239f9d704a08e640d4e70"
= 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 = { c60002 c644242f0a 488d058c792b00 488b5c2440 488d4c242f 6690 e8???????? }
$sequence_1 = { e8???????? 48c740081b000000 488d0d9a972500 488908 488d0d312b2f00 48894c2450 4889442458 }
$sequence_2 = { 7404 488b4008 48898424c0000000 48899c24c8000000 488d05b7651300 bb12000000 488d8c24c0000000 }
$sequence_3 = { e8???????? 488d0d1a4e1800 488b542438 48894a10 833d????????00 7506 48894218 }
$sequence_4 = { eb1c 488d7810 488d1558094400 e8???????? 488d3da6958200 e8???????? 488b1d???????? }
$sequence_5 = { eb04 31c0 31db 48899c24b0000000 4889842488000000 488b8c2498000000 488b91c8000000 }
$sequence_6 = { eb36 488b4c2450 488b4940 488b442478 ffd1 488b7c2468 488b0f }
$sequence_7 = { e8???????? 84c0 7577 488d05c7b12f00 e8???????? 488b0d???????? 488b15???????? }
$sequence_8 = { 750d 488b542440 488910 e9???????? 4889c7 488b542440 e8???????? }
$sequence_9 = { e8???????? 488dbc2400020000 4889e6 660f1f840000000000 0f1f4000 48896c24f0 488d6c24f0 }
condition:
7 of them and filesize < 19940352
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { c60002 c644242f0a 488d058c792b00 488b5c2440 488d4c242f 6690 e8???????? } | |
| $sequence_1 | hex | { e8???????? 48c740081b000000 488d0d9a972500 488908 488d0d312b2f00 48894c2450 4889442458 } | |
| $sequence_2 | hex | { 7404 488b4008 48898424c0000000 48899c24c8000000 488d05b7651300 bb12000000 488d8c24c0000000 } | |
| $sequence_3 | hex | { e8???????? 488d0d1a4e1800 488b542438 48894a10 833d????????00 7506 48894218 } | |
| $sequence_4 | hex | { eb1c 488d7810 488d1558094400 e8???????? 488d3da6958200 e8???????? 488b1d???????? } | |
| $sequence_5 | hex | { eb04 31c0 31db 48899c24b0000000 4889842488000000 488b8c2498000000 488b91c8000000 } | |
| $sequence_6 | hex | { eb36 488b4c2450 488b4940 488b442478 ffd1 488b7c2468 488b0f } | |
| $sequence_7 | hex | { e8???????? 84c0 7577 488d05c7b12f00 e8???????? 488b0d???????? 488b15???????? } | |
| $sequence_8 | hex | { 750d 488b542440 488910 e9???????? 4889c7 488b542440 e8???????? } | |
| $sequence_9 | hex | { e8???????? 488dbc2400020000 4889e6 660f1f840000000000 0f1f4000 48896c24f0 488d6c24f0 } |
Condition
7 of them and filesize < 19940352In plain words (Heuristic)
- The file must be smaller than 19940352 (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: b646bda4-ba63-534d-b90e-bc37d2891c7f
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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