Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Alma_Locker_Auto

autogenerated rule brought to you by yara-signator

MalwareAlma LockerMalpedia 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: Alma Locker.

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

Summary generated from the rule's metadata and condition.

Rule source

win-alma-locker-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Alma_Locker_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "07302dbe-c268-5129-a176-209dc26a0b60"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.alma_locker"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.alma_locker_auto.yar#L1-L130"
		license_url = "N/A"
		logic_hash = "1f3ecd5bf2c205888505143d49753a7baa657590e8b3f73ad8b38ff230d6db7b"
		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 = { 85f6 7403 56 ffd7 68???????? 8d5508 8d8db4feffff }
		$sequence_1 = { 6a00 0f4345d4 6880000000 6a04 6a00 6a01 6a02 }
		$sequence_2 = { eb90 83ec18 33c0 8bcc 89642420 6aff 50 }
		$sequence_3 = { e8???????? 8a45e0 83c40c 84c0 7424 8ad8 }
		$sequence_4 = { 83c404 837db810 8d55a4 ff75b4 0f4355a4 8d8d5cffffff c745a00f000000 }
		$sequence_5 = { 50 ff510c 8d4db0 c645fc01 8bf8 e8???????? }
		$sequence_6 = { 33c0 c78540ffffff07000000 68???????? 8d5508 c7853cffffff00000000 8d8d14ffffff 6689852cffffff }
		$sequence_7 = { 8d0441 c68558fbffff00 8d8db8fbffff 0f438db8fbffff 50 51 }
		$sequence_8 = { 75e8 895e10 83f808 720f 8b06 33c9 }
		$sequence_9 = { c645d400 720e ffb55cffffff e8???????? 83c404 83ec18 8bcc }

	condition:
		7 of them and filesize < 335872
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 85f6 7403 56 ffd7 68???????? 8d5508 8d8db4feffff }
$sequence_1hex{ 6a00 0f4345d4 6880000000 6a04 6a00 6a01 6a02 }
$sequence_2hex{ eb90 83ec18 33c0 8bcc 89642420 6aff 50 }
$sequence_3hex{ e8???????? 8a45e0 83c40c 84c0 7424 8ad8 }
$sequence_4hex{ 83c404 837db810 8d55a4 ff75b4 0f4355a4 8d8d5cffffff c745a00f000000 }
$sequence_5hex{ 50 ff510c 8d4db0 c645fc01 8bf8 e8???????? }
$sequence_6hex{ 33c0 c78540ffffff07000000 68???????? 8d5508 c7853cffffff00000000 8d8d14ffffff 6689852cffffff }
$sequence_7hex{ 8d0441 c68558fbffff00 8d8db8fbffff 0f438db8fbffff 50 51 }
$sequence_8hex{ 75e8 895e10 83f808 720f 8b06 33c9 }
$sequence_9hex{ c645d400 720e ffb55cffffff e8???????? 83c404 83ec18 8bcc }

Condition

7 of them and filesize < 335872

In plain words (Heuristic)

  • The file must be smaller than 335872 (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: 07302dbe-c268-5129-a176-209dc26a0b60

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