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MALPEDIA_Win_Slothfulmedia_Auto

autogenerated rule brought to you by yara-signator

MalwareSlothfulmediaMalpedia 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: Slothfulmedia.

It defines 15 patterns (0 text, 15 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-slothfulmedia-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Slothfulmedia_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "d9174ca3-ebdf-520c-93d3-8be8e8089548"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.slothfulmedia"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.slothfulmedia_auto.yar#L1-L164"
		license_url = "N/A"
		logic_hash = "0aba1adc88768da0c3eac6ae989ab23135f3cd09cdcdff04b83568cc95cb6407"
		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 = { 56 57 33c0 33ff 6806020000 668985ecfdffff 8d85eefdffff }
		$sequence_1 = { 89443110 8bc3 5b 5e c9 c3 }
		$sequence_2 = { 8b86540e0000 3bc7 7438 57 }
		$sequence_3 = { 8bf8 ff15???????? 56 6a00 50 8945fc e8???????? }
		$sequence_4 = { 8bd8 895df0 3bdf 0f8434020000 }
		$sequence_5 = { 6a07 5a 3bc2 0f8756090000 ff2485ed374000 838de8fdffffff 89b5c4fdffff }
		$sequence_6 = { 0f84db000000 80bb3802000000 0f85ce000000 ff742410 ff15???????? }
		$sequence_7 = { ff15???????? eb0a 53 8b1b }
		$sequence_8 = { ffd6 85c0 7507 ffd7 83f805 }
		$sequence_9 = { e8???????? 83c40c 6804010000 8d44240c 50 6a00 ff15???????? }
		$sequence_10 = { 89842408020000 56 57 68d0070000 ff15???????? 33c0 }
		$sequence_11 = { 6a00 8d4c2410 51 ff15???????? 8b8c2410020000 5f }
		$sequence_12 = { 6689442414 e8???????? 83c40c 6a00 }
		$sequence_13 = { 83f805 74ee 6804010000 8d54240c 6a00 52 e8???????? }
		$sequence_14 = { 33c0 e8???????? 81c40c020000 c21000 3b0d???????? 7502 }

	condition:
		7 of them and filesize < 122880
}

Strings (15 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 56 57 33c0 33ff 6806020000 668985ecfdffff 8d85eefdffff }
$sequence_1hex{ 89443110 8bc3 5b 5e c9 c3 }
$sequence_2hex{ 8b86540e0000 3bc7 7438 57 }
$sequence_3hex{ 8bf8 ff15???????? 56 6a00 50 8945fc e8???????? }
$sequence_4hex{ 8bd8 895df0 3bdf 0f8434020000 }
$sequence_5hex{ 6a07 5a 3bc2 0f8756090000 ff2485ed374000 838de8fdffffff 89b5c4fdffff }
$sequence_6hex{ 0f84db000000 80bb3802000000 0f85ce000000 ff742410 ff15???????? }
$sequence_7hex{ ff15???????? eb0a 53 8b1b }
$sequence_8hex{ ffd6 85c0 7507 ffd7 83f805 }
$sequence_9hex{ e8???????? 83c40c 6804010000 8d44240c 50 6a00 ff15???????? }
$sequence_10hex{ 89842408020000 56 57 68d0070000 ff15???????? 33c0 }
$sequence_11hex{ 6a00 8d4c2410 51 ff15???????? 8b8c2410020000 5f }
$sequence_12hex{ 6689442414 e8???????? 83c40c 6a00 }
$sequence_13hex{ 83f805 74ee 6804010000 8d54240c 6a00 52 e8???????? }
$sequence_14hex{ 33c0 e8???????? 81c40c020000 c21000 3b0d???????? 7502 }

Condition

7 of them and filesize < 122880

In plain words (Heuristic)

  • The file must be smaller than 122880 (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: d9174ca3-ebdf-520c-93d3-8be8e8089548

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

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