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MALPEDIA_Win_Chaperone_Auto

autogenerated rule brought to you by yara-signator

MalwareChaperoneMalpedia 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: Chaperone.

It defines 10 patterns (0 text, 10 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-chaperone-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Chaperone_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "3066427d-87e8-5913-b7f1-f941f10f276f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.chaperone"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.chaperone_auto.yar#L1-L125"
		license_url = "N/A"
		logic_hash = "4e322f47e0a918b2877ba0917282a9cd49fff775f9a9c6b3cc2bc03f73873c67"
		score = 75
		quality = 75
		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 = { 0f8557010000 488dbc2428050000 488d35aca90100 b92a000000 f3a4 488d8c2428050000 e8???????? }
		$sequence_1 = { 488d1591c80000 448bc7 8bcf ff15???????? }
		$sequence_2 = { e8???????? 4863942440010000 4c8d442430 488b4c2420 e8???????? 488b8c2458010000 4833cc }
		$sequence_3 = { 488d7b58 be06000000 488d05d5bd0100 483947f0 }
		$sequence_4 = { 89442424 448b442424 33d2 b900040000 ff15???????? 4889442470 48837c247000 }
		$sequence_5 = { 837c243000 740a 83bc24a00700001f 7545 488d442434 4889442428 8b8424a0070000 }
		$sequence_6 = { 48898424c0020000 837c243400 746b 4c8b842490000000 8b542434 488b8c24c0020000 e8???????? }
		$sequence_7 = { 488d8c24b0440000 e8???????? 4885c0 0f8441030000 488d8c24b0440000 e8???????? }
		$sequence_8 = { 4533c0 33d2 33c9 e8???????? 4c8d050c0a0100 498bd5 488bcf }
		$sequence_9 = { 4889442450 488b8424a8000000 4889442448 488b8424a0000000 4889442440 }

	condition:
		7 of them and filesize < 373760
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 0f8557010000 488dbc2428050000 488d35aca90100 b92a000000 f3a4 488d8c2428050000 e8???????? }
$sequence_1hex{ 488d1591c80000 448bc7 8bcf ff15???????? }
$sequence_2hex{ e8???????? 4863942440010000 4c8d442430 488b4c2420 e8???????? 488b8c2458010000 4833cc }
$sequence_3hex{ 488d7b58 be06000000 488d05d5bd0100 483947f0 }
$sequence_4hex{ 89442424 448b442424 33d2 b900040000 ff15???????? 4889442470 48837c247000 }
$sequence_5hex{ 837c243000 740a 83bc24a00700001f 7545 488d442434 4889442428 8b8424a0070000 }
$sequence_6hex{ 48898424c0020000 837c243400 746b 4c8b842490000000 8b542434 488b8c24c0020000 e8???????? }
$sequence_7hex{ 488d8c24b0440000 e8???????? 4885c0 0f8441030000 488d8c24b0440000 e8???????? }
$sequence_8hex{ 4533c0 33d2 33c9 e8???????? 4c8d050c0a0100 498bd5 488bcf }
$sequence_9hex{ 4889442450 488b8424a8000000 4889442448 488b8424a0000000 4889442440 }

Condition

7 of them and filesize < 373760

In plain words (Heuristic)

  • The file must be smaller than 373760 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

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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: 3066427d-87e8-5913-b7f1-f941f10f276f

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