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MALPEDIA_Win_Unidentified_089_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 8 patterns (0 text, 8 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-unidentified-089-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_089_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f61e4a77-808b-5e07-801b-03e57ce838b5"
		date = "2023-07-11"
		modified = "2023-07-15"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_089"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_089_auto.yar#L1-L98"
		license_url = "N/A"
		logic_hash = "f9666eb88fbd91e0eb2e4b4c8812230b36d73d66192fed407aecfaa8f0ed362a"
		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 = { 889dd4feffff 899d84feffff 898588feffff 889d74feffff 33c0 }
		$sequence_1 = { 8b4508 e8???????? c20c00 e8???????? cc 6a30 }
		$sequence_2 = { f2e9e3000000 55 8bec eb0d ff7508 e8???????? }
		$sequence_3 = { 83f904 0f8582000000 8b75d0 8bfb }
		$sequence_4 = { eb0f ff7634 57 ff562c }
		$sequence_5 = { 88041e 880c1f 0fb6041e 8b4dfc 03c2 8b550c }
		$sequence_6 = { 3dffffff7f 0f87a2000000 03c0 3d00100000 7227 }
		$sequence_7 = { 56 6a01 8d4dec 8975d8 }

	condition:
		7 of them and filesize < 389120
}

Strings (8 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 889dd4feffff 899d84feffff 898588feffff 889d74feffff 33c0 }
$sequence_1hex{ 8b4508 e8???????? c20c00 e8???????? cc 6a30 }
$sequence_2hex{ f2e9e3000000 55 8bec eb0d ff7508 e8???????? }
$sequence_3hex{ 83f904 0f8582000000 8b75d0 8bfb }
$sequence_4hex{ eb0f ff7634 57 ff562c }
$sequence_5hex{ 88041e 880c1f 0fb6041e 8b4dfc 03c2 8b550c }
$sequence_6hex{ 3dffffff7f 0f87a2000000 03c0 3d00100000 7227 }
$sequence_7hex{ 56 6a01 8d4dec 8975d8 }

Condition

7 of them and filesize < 389120

In plain words (Heuristic)

  • The file must be smaller than 389120 (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: f61e4a77-808b-5e07-801b-03e57ce838b5

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