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MALPEDIA_Win_Guidloader_Auto

autogenerated rule brought to you by yara-signator

MalwareGuidloaderMalpedia 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: Guidloader.

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

Summary generated from the rule's metadata and condition.

Rule source

win-guidloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Guidloader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "534e1a6f-2457-591b-9bbb-15f45fb7dfe8"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.guidloader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.guidloader_auto.yar#L1-L124"
		license_url = "N/A"
		logic_hash = "ed9095d4782fba48258f819f1d0768a67dce54607139e431173a7b68938ea163"
		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 = { 488b5160 448b8218010000 41c1e010 440b821c010000 4181f801000500 730b 4805d8000000 }
		$sequence_1 = { 0f28b42490000000 4c8bb424a0000000 488bac24d0000000 488b9c24c8000000 488b4c2468 4833cc e8???????? }
		$sequence_2 = { f30f7f4c2458 498bd6 488d4c2448 e8???????? 488d542448 488bce }
		$sequence_3 = { 443bc8 7405 8b5590 ebad 418bdf 85ff 7418 }
		$sequence_4 = { 757e 488d3da69d7601 8b4318 a90c010000 756d 0d02110000 }
		$sequence_5 = { eb26 0fb739 eb21 8b5330 8bc2 488b4b20 c1e804 }
		$sequence_6 = { 4c8ba0f8000000 65488b042530000000 488b4860 8b8118010000 c1e010 0b811c010000 }
		$sequence_7 = { 8b50fc d3ea 448bda 4183e303 }
		$sequence_8 = { 0f8c84000000 488bcf bf00800000 66853c4a 7476 488b4808 }
		$sequence_9 = { 4d85c0 7437 413830 7509 }

	condition:
		7 of them and filesize < 49251328
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 488b5160 448b8218010000 41c1e010 440b821c010000 4181f801000500 730b 4805d8000000 }
$sequence_1hex{ 0f28b42490000000 4c8bb424a0000000 488bac24d0000000 488b9c24c8000000 488b4c2468 4833cc e8???????? }
$sequence_2hex{ f30f7f4c2458 498bd6 488d4c2448 e8???????? 488d542448 488bce }
$sequence_3hex{ 443bc8 7405 8b5590 ebad 418bdf 85ff 7418 }
$sequence_4hex{ 757e 488d3da69d7601 8b4318 a90c010000 756d 0d02110000 }
$sequence_5hex{ eb26 0fb739 eb21 8b5330 8bc2 488b4b20 c1e804 }
$sequence_6hex{ 4c8ba0f8000000 65488b042530000000 488b4860 8b8118010000 c1e010 0b811c010000 }
$sequence_7hex{ 8b50fc d3ea 448bda 4183e303 }
$sequence_8hex{ 0f8c84000000 488bcf bf00800000 66853c4a 7476 488b4808 }
$sequence_9hex{ 4d85c0 7437 413830 7509 }

Condition

7 of them and filesize < 49251328

In plain words (Heuristic)

  • The file must be smaller than 49251328 (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.

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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: 534e1a6f-2457-591b-9bbb-15f45fb7dfe8

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