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MALPEDIA_Win_Absentloader_Auto

autogenerated rule brought to you by yara-signator

MalwareAbsentloaderMalpedia 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: Absentloader.

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

Summary generated from the rule's metadata and condition.

Rule source

win-absentloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Absentloader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "c9a71466-6712-51fe-bbe0-2b4463ced47f"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.absentloader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.absentloader_auto.yar#L1-L131"
		license_url = "N/A"
		logic_hash = "51ff6d09638e9228b9e70bcdf22cd50964deb750aee4372725e598d4c91a0a8d"
		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 = { 8d8de8fbffff e8???????? 68048701fd 53 6a18 8d8568fdffff }
		$sequence_1 = { 83e03f c1f906 6bc038 03048de8a006fd 50 ff15???????? 5d }
		$sequence_2 = { 895dfc 6a0f 5a 895e10 895614 881e }
		$sequence_3 = { c745fc0a000000 8b4d2c 85c9 7411 8b31 8d4508 3bc8 }
		$sequence_4 = { 59 c3 83610400 8bc1 83610800 c741040cf305fd c7013c1e05fd }
		$sequence_5 = { c74408e82c1a06fd 8b06 8b5004 8d42e8 89440ae4 8365fc00 }
		$sequence_6 = { 89a564faffff 8d85c0fbffff 8bf4 83ec18 8bcc 89a55cfaffff 50 }
		$sequence_7 = { e8???????? 59 59 85c0 7505 b835f305fd 56 }
		$sequence_8 = { 6a32 58 2b448ddc 6bc014 99 f7ff 8d0417 }
		$sequence_9 = { 8bcf 8bd8 83c101 0f92c2 f7da 0bd1 52 }

	condition:
		7 of them and filesize < 794624
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8d8de8fbffff e8???????? 68048701fd 53 6a18 8d8568fdffff }
$sequence_1hex{ 83e03f c1f906 6bc038 03048de8a006fd 50 ff15???????? 5d }
$sequence_2hex{ 895dfc 6a0f 5a 895e10 895614 881e }
$sequence_3hex{ c745fc0a000000 8b4d2c 85c9 7411 8b31 8d4508 3bc8 }
$sequence_4hex{ 59 c3 83610400 8bc1 83610800 c741040cf305fd c7013c1e05fd }
$sequence_5hex{ c74408e82c1a06fd 8b06 8b5004 8d42e8 89440ae4 8365fc00 }
$sequence_6hex{ 89a564faffff 8d85c0fbffff 8bf4 83ec18 8bcc 89a55cfaffff 50 }
$sequence_7hex{ e8???????? 59 59 85c0 7505 b835f305fd 56 }
$sequence_8hex{ 6a32 58 2b448ddc 6bc014 99 f7ff 8d0417 }
$sequence_9hex{ 8bcf 8bd8 83c101 0f92c2 f7da 0bd1 52 }

Condition

7 of them and filesize < 794624

In plain words (Heuristic)

  • The file must be smaller than 794624 (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: c9a71466-6712-51fe-bbe0-2b4463ced47f

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