YARA · Malpedia signator rules
MALPEDIA_Win_Theme_Forest_Rat_Auto
autogenerated rule brought to you by yara-signator
MalwareTheme Forest RatMalpedia 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: Theme Forest Rat.
It defines 10 patterns (0 text, 10 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-theme-forest-rat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Theme_Forest_Rat_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "2dfda398-f2e0-5044-aa0d-96a802a77678"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.theme_forest_rat"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.theme_forest_rat_auto.yar#L1-L131"
= "N/A"
= "1f9b18271343c20c0a3cb56f23f6a9c9adf0d77b95c33d44db6f3d949d45d1a5"
= 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 = { 488bcb ff15???????? 83a56006000000 4c8d8568060000 48c7c702000080 c7855806000064000000 }
$sequence_1 = { 7575 488d442440 c7860824000001000000 488bd6 488d4c2440 482bd0 0fb701 }
$sequence_2 = { 488b4c2460 488d442468 4889442428 41b901000000 4533c0 c744242001000000 ba00000002 }
$sequence_3 = { 56 57 4156 4883ec40 8b6934 488bfa 8b5130 }
$sequence_4 = { 488958e0 488958d8 8958d0 488958c8 4183c9ff 4c8bc1 33d2 }
$sequence_5 = { e8???????? 85c0 0f85be030000 4885f6 488d2d51170300 480f45ee }
$sequence_6 = { 490f43d4 4883c118 e8???????? 4d3bf4 ba08000000 661bc0 66f7d0 }
$sequence_7 = { 8918 c7400416100010 c7400801000000 89bd24a80000 488d8d1ca80000 e8???????? 488bcd }
$sequence_8 = { 4883ec28 4c8b01 498bc0 48f7d0 483bc2 720f }
$sequence_9 = { 03d0 8bc5 8d0c92 03c9 498d5710 2bc1 4863c8 }
condition:
7 of them and filesize < 651264
}
Strings (10 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 488bcb ff15???????? 83a56006000000 4c8d8568060000 48c7c702000080 c7855806000064000000 } | |
| $sequence_1 | hex | { 7575 488d442440 c7860824000001000000 488bd6 488d4c2440 482bd0 0fb701 } | |
| $sequence_2 | hex | { 488b4c2460 488d442468 4889442428 41b901000000 4533c0 c744242001000000 ba00000002 } | |
| $sequence_3 | hex | { 56 57 4156 4883ec40 8b6934 488bfa 8b5130 } | |
| $sequence_4 | hex | { 488958e0 488958d8 8958d0 488958c8 4183c9ff 4c8bc1 33d2 } | |
| $sequence_5 | hex | { e8???????? 85c0 0f85be030000 4885f6 488d2d51170300 480f45ee } | |
| $sequence_6 | hex | { 490f43d4 4883c118 e8???????? 4d3bf4 ba08000000 661bc0 66f7d0 } | |
| $sequence_7 | hex | { 8918 c7400416100010 c7400801000000 89bd24a80000 488d8d1ca80000 e8???????? 488bcd } | |
| $sequence_8 | hex | { 4883ec28 4c8b01 498bc0 48f7d0 483bc2 720f } | |
| $sequence_9 | hex | { 03d0 8bc5 8d0c92 03c9 498d5710 2bc1 4863c8 } |
Condition
7 of them and filesize < 651264In plain words (Heuristic)
- The file must be smaller than 651264 (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: 2dfda398-f2e0-5044-aa0d-96a802a77678
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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