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MALPEDIA_Win_Unidentified_061_Auto

autogenerated rule brought to you by yara-signator

MalwareMalpedia signator rulesCreative Commons Attribution-ShareAlike 4.0Compiles with YARA-X
Author
Felix Bilstein - yara-signator at cocacoding dot com
Date
2023-07-11
Modified
2023-07-15
Score / Quality
75 / 75

What this rule detects

autogenerated rule brought to you by yara-signator

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

Summary generated from the rule's metadata and condition.

Rule source

win-unidentified-061-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_061_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "59888b60-a3e6-5e9f-a441-429646fe0731"
		date = "2023-07-11"
		modified = "2023-07-15"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_061"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_061_auto.yar#L1-L123"
		license_url = "N/A"
		logic_hash = "ee3ce5b6c77f09c690f7a934c26be09c58c4fcdee70275b61c00e527d8aa097d"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20230705"
		malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
		malpedia_version = "20230715"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 8d85d4fdffff 50 e8???????? c9 }
		$sequence_1 = { 89b5f0fdffff 899decfdffff 89b5f4feffff 899df0feffff ff15???????? 8945fc }
		$sequence_2 = { 51 8365fc00 8d45fc 50 68???????? 6801000080 ff15???????? }
		$sequence_3 = { 8945f0 0fb705???????? 50 ff15???????? 668945ee }
		$sequence_4 = { 68???????? 56 ff15???????? 83c41c 8d4601 5e eb09 }
		$sequence_5 = { 7417 03f3 3bf7 7ccb eb2f 7d29 }
		$sequence_6 = { 83cfff c6457300 3b7566 7cb5 3b7566 }
		$sequence_7 = { 53 57 6a04 33ff 33db }
		$sequence_8 = { 5b c9 c20800 81ec00040000 68???????? 68???????? ff15???????? }
		$sequence_9 = { eb04 c645fb3d 6a05 8d45f8 50 ff750c c645fc00 }

	condition:
		7 of them and filesize < 360448
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8d85d4fdffff 50 e8???????? c9 }
$sequence_1hex{ 89b5f0fdffff 899decfdffff 89b5f4feffff 899df0feffff ff15???????? 8945fc }
$sequence_2hex{ 51 8365fc00 8d45fc 50 68???????? 6801000080 ff15???????? }
$sequence_3hex{ 8945f0 0fb705???????? 50 ff15???????? 668945ee }
$sequence_4hex{ 68???????? 56 ff15???????? 83c41c 8d4601 5e eb09 }
$sequence_5hex{ 7417 03f3 3bf7 7ccb eb2f 7d29 }
$sequence_6hex{ 83cfff c6457300 3b7566 7cb5 3b7566 }
$sequence_7hex{ 53 57 6a04 33ff 33db }
$sequence_8hex{ 5b c9 c20800 81ec00040000 68???????? 68???????? ff15???????? }
$sequence_9hex{ eb04 c645fb3d 6a05 8d45f8 50 ff750c c645fc00 }

Condition

7 of them and filesize < 360448

In plain words (Heuristic)

  • The file must be smaller than 360448 (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: 59888b60-a3e6-5e9f-a441-429646fe0731

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20230705
malpedia_hash42d0574f4405bd7d2b154d321d345acb18834a41
malpedia_version20230715
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE