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MALPEDIA_Win_Buterat_Auto

autogenerated rule brought to you by yara-signator

MalwareButeratMalpedia 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: Buterat.

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

Summary generated from the rule's metadata and condition.

Rule source

win-buterat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Buterat_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "50d92a3f-78d1-58e1-8ee4-7ac7cabb0190"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.buterat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.buterat_auto.yar#L1-L122"
		license_url = "N/A"
		logic_hash = "f18323dbd62ec255a3bc886f59587abbdccfc69605ccff661141521c212ccc12"
		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 = { 59 50 8d85fcf7ffff 50 57 ff15???????? }
		$sequence_1 = { 8b4e04 894c2418 51 752c 8b9700ec4100 e8???????? 8b9700ec4100 }
		$sequence_2 = { 1bc0 2500000100 0bf0 837df400 740b ff75f4 e8???????? }
		$sequence_3 = { 56 57 6a02 56 56 68000000c0 }
		$sequence_4 = { 0bf0 8b45e8 85c0 7407 }
		$sequence_5 = { 39742408 8944240c 741c 8d4c2410 }
		$sequence_6 = { 7520 e8???????? 8b3c9d68f24100 2bf9 99 f7ff 42 }
		$sequence_7 = { 83ff04 7530 837df001 7e2a ff75f4 8d45f8 }
		$sequence_8 = { 744c 7e45 8d8df4efffff 8d4601 51 bb???????? }
		$sequence_9 = { 895dfc e8???????? 8d85b8fdffff 50 ba???????? }

	condition:
		7 of them and filesize < 278528
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 59 50 8d85fcf7ffff 50 57 ff15???????? }
$sequence_1hex{ 8b4e04 894c2418 51 752c 8b9700ec4100 e8???????? 8b9700ec4100 }
$sequence_2hex{ 1bc0 2500000100 0bf0 837df400 740b ff75f4 e8???????? }
$sequence_3hex{ 56 57 6a02 56 56 68000000c0 }
$sequence_4hex{ 0bf0 8b45e8 85c0 7407 }
$sequence_5hex{ 39742408 8944240c 741c 8d4c2410 }
$sequence_6hex{ 7520 e8???????? 8b3c9d68f24100 2bf9 99 f7ff 42 }
$sequence_7hex{ 83ff04 7530 837df001 7e2a ff75f4 8d45f8 }
$sequence_8hex{ 744c 7e45 8d8df4efffff 8d4601 51 bb???????? }
$sequence_9hex{ 895dfc e8???????? 8d85b8fdffff 50 ba???????? }

Condition

7 of them and filesize < 278528

In plain words (Heuristic)

  • The file must be smaller than 278528 (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: 50d92a3f-78d1-58e1-8ee4-7ac7cabb0190

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