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MALPEDIA_Win_Mortis_Auto

autogenerated rule brought to you by yara-signator

MalwareMortisMalpedia 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: Mortis.

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

Summary generated from the rule's metadata and condition.

Rule source

win-mortis-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Mortis_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "dbe687bf-0b72-53ae-b169-e120ce0111c3"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mortis"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.mortis_auto.yar#L1-L127"
		license_url = "N/A"
		logic_hash = "34f4bf3937ac9feb2a5a10e1f9edc6ce460181f96ee77ab2ff794db89a8aa306"
		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 = { c78560ffffff90044300 e8???????? 83c404 8b4df4 64890d00000000 59 5f }
		$sequence_1 = { b8aaaaaa0a c1fa02 8bca c1e91f 03ca 2bc1 894dc8 }
		$sequence_2 = { ffb54cfdffff 8d4d98 e8???????? be11000000 }
		$sequence_3 = { 8b4004 c7443890fcc24300 8b06 8b5004 8d4290 89443a8c e8???????? }
		$sequence_4 = { 5d c3 ba???????? eb05 ba???????? b9???????? e8???????? }
		$sequence_5 = { 8bce e8???????? 8b460c 83b8a800000000 750e 8b04bd201f4400 }
		$sequence_6 = { 8955d8 8bd9 8b03 33ff 895de4 }
		$sequence_7 = { 83c404 8b7de4 3bf7 743c 90 837e0400 }
		$sequence_8 = { 8bce e8???????? c645fc04 8b4dd0 83f910 722c 8b55bc }
		$sequence_9 = { 8b4df0 8b0485201f4400 8a44012b 8b4d08 3c0a 7461 85db }

	condition:
		7 of them and filesize < 577536
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c78560ffffff90044300 e8???????? 83c404 8b4df4 64890d00000000 59 5f }
$sequence_1hex{ b8aaaaaa0a c1fa02 8bca c1e91f 03ca 2bc1 894dc8 }
$sequence_2hex{ ffb54cfdffff 8d4d98 e8???????? be11000000 }
$sequence_3hex{ 8b4004 c7443890fcc24300 8b06 8b5004 8d4290 89443a8c e8???????? }
$sequence_4hex{ 5d c3 ba???????? eb05 ba???????? b9???????? e8???????? }
$sequence_5hex{ 8bce e8???????? 8b460c 83b8a800000000 750e 8b04bd201f4400 }
$sequence_6hex{ 8955d8 8bd9 8b03 33ff 895de4 }
$sequence_7hex{ 83c404 8b7de4 3bf7 743c 90 837e0400 }
$sequence_8hex{ 8bce e8???????? c645fc04 8b4dd0 83f910 722c 8b55bc }
$sequence_9hex{ 8b4df0 8b0485201f4400 8a44012b 8b4d08 3c0a 7461 85db }

Condition

7 of them and filesize < 577536

In plain words (Heuristic)

  • The file must be smaller than 577536 (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: dbe687bf-0b72-53ae-b169-e120ce0111c3

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