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MALPEDIA_Win_Unidentified_094_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
2023-12-06
Modified
2023-12-08
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-094-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_094_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f5bdd8f3-d974-5222-9555-3631072a29c0"
		date = "2023-12-06"
		modified = "2023-12-08"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_094"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_094_auto.yar#L1-L118"
		license_url = "N/A"
		logic_hash = "f3d0ed91e99c9ab03a6ddd24a2a28007a40b7e677077c8b725a5a67f32cc52a7"
		score = 75
		quality = 75
		tags = "FILE"
		version = "1"
		tool = "yara-signator v0.6.0"
		signator_config = "callsandjumps;datarefs;binvalue"
		malpedia_rule_date = "20231130"
		malpedia_hash = "fc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351"
		malpedia_version = "20230808"
		malpedia_license = "CC BY-SA 4.0"
		malpedia_sharing = "TLP:WHITE"

	strings:
		$sequence_0 = { 890d???????? 57 8915???????? a3???????? 83ceff b9???????? }
		$sequence_1 = { 6a5c 68???????? e8???????? 83c408 33c9 }
		$sequence_2 = { 0fb65004 3015???????? 0fb64805 300d???????? 0fb65006 3015???????? }
		$sequence_3 = { 83c310 ff4d0c 0f857ffeffff 5f }
		$sequence_4 = { 0fb65004 3015???????? 0fb64805 300d???????? 0fb65006 3015???????? c3 }
		$sequence_5 = { 884dff 84d2 7902 341b }
		$sequence_6 = { 3055fd 0fb61401 3055fe 0fb6540101 3055ff 8b55fc 89540102 }
		$sequence_7 = { 6a00 6a00 6a00 ff15???????? c3 }
		$sequence_8 = { 80f31b 8ad3 02d2 84db 7903 80f21b }
		$sequence_9 = { 890d???????? 57 8915???????? a3???????? }

	condition:
		7 of them and filesize < 524288
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 890d???????? 57 8915???????? a3???????? 83ceff b9???????? }
$sequence_1hex{ 6a5c 68???????? e8???????? 83c408 33c9 }
$sequence_2hex{ 0fb65004 3015???????? 0fb64805 300d???????? 0fb65006 3015???????? }
$sequence_3hex{ 83c310 ff4d0c 0f857ffeffff 5f }
$sequence_4hex{ 0fb65004 3015???????? 0fb64805 300d???????? 0fb65006 3015???????? c3 }
$sequence_5hex{ 884dff 84d2 7902 341b }
$sequence_6hex{ 3055fd 0fb61401 3055fe 0fb6540101 3055ff 8b55fc 89540102 }
$sequence_7hex{ 6a00 6a00 6a00 ff15???????? c3 }
$sequence_8hex{ 80f31b 8ad3 02d2 84db 7903 80f21b }
$sequence_9hex{ 890d???????? 57 8915???????? a3???????? }

Condition

7 of them and filesize < 524288

In plain words (Heuristic)

  • The file must be smaller than 524288 (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: f5bdd8f3-d974-5222-9555-3631072a29c0

Metadata

version1
toolyara-signator v0.6.0
signator_configcallsandjumps;datarefs;binvalue
malpedia_rule_date20231130
malpedia_hashfc8a0e9f343f6d6ded9e7df1a64dac0cc68d7351
malpedia_version20230808
malpedia_licenseCC BY-SA 4.0
malpedia_sharingTLP:WHITE

Tags:FILE