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MALPEDIA_Win_Unidentified_045_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
2026-05-04
Modified
2026-05-18
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-045-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_045_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "40a40ddb-c11e-5d8c-8982-cd9cb4fd36c3"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_045"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_045_auto.yar#L1-L104"
		license_url = "N/A"
		logic_hash = "efeaa9798ec2b87dd7b8f92c23612419ddf67b2b001ffe8d91af2c86392a4770"
		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 = { 8901 e8???????? a3???????? 6a02 53 8b4598 }
		$sequence_1 = { 8d4dfc 51 6a28 50 8945f8 }
		$sequence_2 = { eb3a 81f911111111 7507 a3???????? eb2b }
		$sequence_3 = { 80f901 730a 51 8b4df8 d345fc 59 eb08 }
		$sequence_4 = { 53 53 ffd7 8b4d70 ff4570 }
		$sequence_5 = { 7434 40 8944240c bf???????? 381d???????? 7422 }
		$sequence_6 = { 3c41 742c 3c42 7428 56 ff15???????? }
		$sequence_7 = { 8945ac 0fb74606 6bc028 8dbc30f8000000 8d4f28 8b45dc }

	condition:
		7 of them and filesize < 73728
}

Strings (8 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8901 e8???????? a3???????? 6a02 53 8b4598 }
$sequence_1hex{ 8d4dfc 51 6a28 50 8945f8 }
$sequence_2hex{ eb3a 81f911111111 7507 a3???????? eb2b }
$sequence_3hex{ 80f901 730a 51 8b4df8 d345fc 59 eb08 }
$sequence_4hex{ 53 53 ffd7 8b4d70 ff4570 }
$sequence_5hex{ 7434 40 8944240c bf???????? 381d???????? 7422 }
$sequence_6hex{ 3c41 742c 3c42 7428 56 ff15???????? }
$sequence_7hex{ 8945ac 0fb74606 6bc028 8dbc30f8000000 8d4f28 8b45dc }

Condition

7 of them and filesize < 73728

In plain words (Heuristic)

  • The file must be smaller than 73728 (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: 40a40ddb-c11e-5d8c-8982-cd9cb4fd36c3

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