YARA · Malpedia signator rules
MALPEDIA_Win_Warmcookie_Auto
autogenerated rule brought to you by yara-signator
MalwareWarmcookieMalpedia 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 / 73
What this rule detects
autogenerated rule brought to you by yara-signator
Associated malware family: Warmcookie.
It defines 24 patterns (0 text, 24 hex, 0 regex).
Summary generated from the rule's metadata and condition.
Rule source
win-warmcookie-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Warmcookie_Auto : FILE
{
meta:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "ec89ed75-43ef-5e93-903d-d3f8383c90e1"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.warmcookie"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.warmcookie_auto.yar#L1-L228"
= "N/A"
= "dade3f49f004a30a420737451cd7da729d7cda1285499c65a4f74cd9aeafbe8d"
= 75
= 73
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "TLP:WHITE"
strings:
$sequence_0 = { 0f8709060000 4183fe03 0f87ff050000 4585f6 0f850a020000 }
$sequence_1 = { 85c0 0f88c0060000 8d0480 8d4441d0 418902 0fb74502 }
$sequence_2 = { 8944242c 48b8fffffffffdffffff 4889842480000000 31c0 6689842488000000 0fb706 897c2478 }
$sequence_3 = { 41b902000000 41b800000000 ba00000000 4889c1 }
$sequence_4 = { 48c744243000000000 c744242880000000 c744242003000000 41b900000000 41b807000000 ba00000080 4889c1 }
$sequence_5 = { 0f8e1bffffff 01d0 89430c e9???????? 4157 }
$sequence_6 = { 415c c3 55 4157 4156 4155 4154 }
$sequence_7 = { ba19000000 488b4c2438 ff15???????? 85c0 }
$sequence_8 = { 4883ec28 e8???????? 3dff2f0000 0f97c0 0fb6c0 }
$sequence_9 = { 85c0 7409 488b442428 48c1e814 }
$sequence_10 = { 488d4c0301 4801c9 e8???????? 4889c3 4885c0 }
$sequence_11 = { ba18000000 4889c1 ffd3 85c0 }
$sequence_12 = { 488b01 ff9080000000 85c0 7815 }
$sequence_13 = { ff15???????? 25ff0f0000 8d88b80b0000 ff15???????? }
$sequence_14 = { ff5010 b9e8030000 ff15???????? 83ef01 }
$sequence_15 = { 4b8d1c00 4889d9 e8???????? 4989d8 488944f500 }
$sequence_16 = { 488905???????? 448b06 4585c0 7416 b80a000000 }
$sequence_17 = { 488d542470 b901010000 ff15???????? 85c0 }
$sequence_18 = { 750b 488b4c2460 488b01 ff5068 488b4c2468 }
$sequence_19 = { 6642894c0c20 ffc2 4f8d0c00 410fb70c19 6685c9 75d8 4863c2 }
$sequence_20 = { ff15???????? b906000000 ba04000000 85c0 }
$sequence_21 = { 1bc9 41d1e8 81e12083b8ed 4133c8 8bc1 2401 }
$sequence_22 = { 83e2fc 83c224 89542450 83c2fc }
$sequence_23 = { 488bcf e8???????? 488b6c2460 488bce e8???????? 488b7c2468 8bc3 }
condition:
7 of them and filesize < 331776
}
Strings (24 patterns)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 0f8709060000 4183fe03 0f87ff050000 4585f6 0f850a020000 } | |
| $sequence_1 | hex | { 85c0 0f88c0060000 8d0480 8d4441d0 418902 0fb74502 } | |
| $sequence_2 | hex | { 8944242c 48b8fffffffffdffffff 4889842480000000 31c0 6689842488000000 0fb706 897c2478 } | |
| $sequence_3 | hex | { 41b902000000 41b800000000 ba00000000 4889c1 } | |
| $sequence_4 | hex | { 48c744243000000000 c744242880000000 c744242003000000 41b900000000 41b807000000 ba00000080 4889c1 } | |
| $sequence_5 | hex | { 0f8e1bffffff 01d0 89430c e9???????? 4157 } | |
| $sequence_6 | hex | { 415c c3 55 4157 4156 4155 4154 } | |
| $sequence_7 | hex | { ba19000000 488b4c2438 ff15???????? 85c0 } | |
| $sequence_8 | hex | { 4883ec28 e8???????? 3dff2f0000 0f97c0 0fb6c0 } | |
| $sequence_9 | hex | { 85c0 7409 488b442428 48c1e814 } | |
| $sequence_10 | hex | { 488d4c0301 4801c9 e8???????? 4889c3 4885c0 } | |
| $sequence_11 | hex | { ba18000000 4889c1 ffd3 85c0 } | |
| $sequence_12 | hex | { 488b01 ff9080000000 85c0 7815 } | |
| $sequence_13 | hex | { ff15???????? 25ff0f0000 8d88b80b0000 ff15???????? } | |
| $sequence_14 | hex | { ff5010 b9e8030000 ff15???????? 83ef01 } | |
| $sequence_15 | hex | { 4b8d1c00 4889d9 e8???????? 4989d8 488944f500 } | |
| $sequence_16 | hex | { 488905???????? 448b06 4585c0 7416 b80a000000 } | |
| $sequence_17 | hex | { 488d542470 b901010000 ff15???????? 85c0 } | |
| $sequence_18 | hex | { 750b 488b4c2460 488b01 ff5068 488b4c2468 } | |
| $sequence_19 | hex | { 6642894c0c20 ffc2 4f8d0c00 410fb70c19 6685c9 75d8 4863c2 } | |
| $sequence_20 | hex | { ff15???????? b906000000 ba04000000 85c0 } | |
| $sequence_21 | hex | { 1bc9 41d1e8 81e12083b8ed 4133c8 8bc1 2401 } | |
| $sequence_22 | hex | { 83e2fc 83c224 89542450 83c2fc } | |
| $sequence_23 | hex | { 488bcf e8???????? 488b6c2460 488bce e8???????? 488b7c2468 8bc3 } |
Condition
7 of them and filesize < 331776In plain words (Heuristic)
- The file must be smaller than 331776 (a cheap guard that skips large files).
- At least 7 patterns in the rule must match.
Test this rule in your browser
Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.
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: ec89ed75-43ef-5e93-903d-d3f8383c90e1
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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