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MALPEDIA_Win_Shortleash_Auto

autogenerated rule brought to you by yara-signator

MalwareShortleashMalpedia 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: Shortleash.

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

Summary generated from the rule's metadata and condition.

Rule source

win-shortleash-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Shortleash_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2dce8e58-6ca1-5187-ba1f-93da289cd793"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.shortleash"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.shortleash_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "71539c4b2430b9e8011503006f9e5cf6c8a2770185be5eff5fd5462a77f2cf20"
		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 = { e8???????? 3ac3 7506 4883c420 5b c3 41b848020000 }
		$sequence_1 = { e8???????? 48894308 4c8b26 0f57c0 f30f7f45c0 498b5618 4885d2 }
		$sequence_2 = { ba18000000 488bcb e8???????? 488b5540 488d4d58 e8???????? 488b5d38 }
		$sequence_3 = { 4a8d1c09 eb02 33db 4885db 7410 488d056e070000 488d0d7b210000 }
		$sequence_4 = { 488d4c2440 e8???????? 0f1007 f30f7f442420 4c8d442420 488bd0 488bcb }
		$sequence_5 = { b880c2ffff e9???????? 4c8d45e0 488bd7 488d4d30 e8???????? 8bd8 }
		$sequence_6 = { 418bcb 4433c0 f7d1 4123cc 418bc3 c1c806 4433c0 }
		$sequence_7 = { ffd2 498d8da0000000 488d559f e8???????? 90 4c8bc0 498bd5 }
		$sequence_8 = { 85ed 74c8 458bf0 ebc6 33c0 85c9 751a }
		$sequence_9 = { 7516 488bcf e8???????? 8bd8 498bce e8???????? 3bc3 }

	condition:
		7 of them and filesize < 2415616
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? 3ac3 7506 4883c420 5b c3 41b848020000 }
$sequence_1hex{ e8???????? 48894308 4c8b26 0f57c0 f30f7f45c0 498b5618 4885d2 }
$sequence_2hex{ ba18000000 488bcb e8???????? 488b5540 488d4d58 e8???????? 488b5d38 }
$sequence_3hex{ 4a8d1c09 eb02 33db 4885db 7410 488d056e070000 488d0d7b210000 }
$sequence_4hex{ 488d4c2440 e8???????? 0f1007 f30f7f442420 4c8d442420 488bd0 488bcb }
$sequence_5hex{ b880c2ffff e9???????? 4c8d45e0 488bd7 488d4d30 e8???????? 8bd8 }
$sequence_6hex{ 418bcb 4433c0 f7d1 4123cc 418bc3 c1c806 4433c0 }
$sequence_7hex{ ffd2 498d8da0000000 488d559f e8???????? 90 4c8bc0 498bd5 }
$sequence_8hex{ 85ed 74c8 458bf0 ebc6 33c0 85c9 751a }
$sequence_9hex{ 7516 488bcf e8???????? 8bd8 498bce e8???????? 3bc3 }

Condition

7 of them and filesize < 2415616

In plain words (Heuristic)

  • The file must be smaller than 2415616 (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: 2dce8e58-6ca1-5187-ba1f-93da289cd793

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