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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:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "ec89ed75-43ef-5e93-903d-d3f8383c90e1"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.warmcookie"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.warmcookie_auto.yar#L1-L228"
		license_url = "N/A"
		logic_hash = "dade3f49f004a30a420737451cd7da729d7cda1285499c65a4f74cd9aeafbe8d"
		score = 75
		quality = 73
		tags = "FILE"
		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"

	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)

IdentifierTypeValueModifiers
$sequence_0hex{ 0f8709060000 4183fe03 0f87ff050000 4585f6 0f850a020000 }
$sequence_1hex{ 85c0 0f88c0060000 8d0480 8d4441d0 418902 0fb74502 }
$sequence_2hex{ 8944242c 48b8fffffffffdffffff 4889842480000000 31c0 6689842488000000 0fb706 897c2478 }
$sequence_3hex{ 41b902000000 41b800000000 ba00000000 4889c1 }
$sequence_4hex{ 48c744243000000000 c744242880000000 c744242003000000 41b900000000 41b807000000 ba00000080 4889c1 }
$sequence_5hex{ 0f8e1bffffff 01d0 89430c e9???????? 4157 }
$sequence_6hex{ 415c c3 55 4157 4156 4155 4154 }
$sequence_7hex{ ba19000000 488b4c2438 ff15???????? 85c0 }
$sequence_8hex{ 4883ec28 e8???????? 3dff2f0000 0f97c0 0fb6c0 }
$sequence_9hex{ 85c0 7409 488b442428 48c1e814 }
$sequence_10hex{ 488d4c0301 4801c9 e8???????? 4889c3 4885c0 }
$sequence_11hex{ ba18000000 4889c1 ffd3 85c0 }
$sequence_12hex{ 488b01 ff9080000000 85c0 7815 }
$sequence_13hex{ ff15???????? 25ff0f0000 8d88b80b0000 ff15???????? }
$sequence_14hex{ ff5010 b9e8030000 ff15???????? 83ef01 }
$sequence_15hex{ 4b8d1c00 4889d9 e8???????? 4989d8 488944f500 }
$sequence_16hex{ 488905???????? 448b06 4585c0 7416 b80a000000 }
$sequence_17hex{ 488d542470 b901010000 ff15???????? 85c0 }
$sequence_18hex{ 750b 488b4c2460 488b01 ff5068 488b4c2468 }
$sequence_19hex{ 6642894c0c20 ffc2 4f8d0c00 410fb70c19 6685c9 75d8 4863c2 }
$sequence_20hex{ ff15???????? b906000000 ba04000000 85c0 }
$sequence_21hex{ 1bc9 41d1e8 81e12083b8ed 4133c8 8bc1 2401 }
$sequence_22hex{ 83e2fc 83c224 89542450 83c2fc }
$sequence_23hex{ 488bcf e8???????? 488b6c2460 488bce e8???????? 488b7c2468 8bc3 }

Condition

7 of them and filesize < 331776

In 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.

Open in editor

References

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)

Original rule

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

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20260422
malpedia_hasha182e35da64e6d71cb55f125c4d4225196523f14
malpedia_version20260504
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE