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MALPEDIA_Win_Bunitu_Auto

autogenerated rule brought to you by yara-signator

MalwareBunituMalpedia 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: Bunitu.

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

Summary generated from the rule's metadata and condition.

Rule source

win-bunitu-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Bunitu_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "c85a7627-4384-5dd1-9fe2-f7c21bc40415"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.bunitu"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.bunitu_auto.yar#L1-L115"
		license_url = "N/A"
		logic_hash = "ef61b95a2caa6c954a4bcdebaf86e1775c34fff361c1dda8a0360f85c88dbfda"
		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 = { ff75fc ff15???????? 6a05 ff75fc ff15???????? 6a00 6a00 }
		$sequence_1 = { 50 ffb524fdffff e8???????? 58 }
		$sequence_2 = { 899078130000 ffb544feffff 51 6800040000 6a00 }
		$sequence_3 = { eb05 e8???????? 6864190000 6a08 }
		$sequence_4 = { 8b09 898dd8feffff 6689bddcfeffff e9???????? 80bd2ffdffff01 }
		$sequence_5 = { 57 52 8b7d08 8b750c 8b4d10 49 }
		$sequence_6 = { 50 687c150000 6a08 ff35???????? }
		$sequence_7 = { 8b8544feffff 8b9530feffff 899074130000 8b5510 }
		$sequence_8 = { 81c458feffff 8dbd58feffff b91c000000 33c0 f3aa }
		$sequence_9 = { 0bc0 7415 40 7412 48 50 ff7508 }

	condition:
		7 of them and filesize < 221184
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ ff75fc ff15???????? 6a05 ff75fc ff15???????? 6a00 6a00 }
$sequence_1hex{ 50 ffb524fdffff e8???????? 58 }
$sequence_2hex{ 899078130000 ffb544feffff 51 6800040000 6a00 }
$sequence_3hex{ eb05 e8???????? 6864190000 6a08 }
$sequence_4hex{ 8b09 898dd8feffff 6689bddcfeffff e9???????? 80bd2ffdffff01 }
$sequence_5hex{ 57 52 8b7d08 8b750c 8b4d10 49 }
$sequence_6hex{ 50 687c150000 6a08 ff35???????? }
$sequence_7hex{ 8b8544feffff 8b9530feffff 899074130000 8b5510 }
$sequence_8hex{ 81c458feffff 8dbd58feffff b91c000000 33c0 f3aa }
$sequence_9hex{ 0bc0 7415 40 7412 48 50 ff7508 }

Condition

7 of them and filesize < 221184

In plain words (Heuristic)

  • The file must be smaller than 221184 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

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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: c85a7627-4384-5dd1-9fe2-f7c21bc40415

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