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MALPEDIA_Win_Unidentified_087_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 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-unidentified-087-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Unidentified_087_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "e0393d3c-afd5-55e5-83bc-a6ecb5781a61"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.unidentified_087"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.unidentified_087_auto.yar#L1-L171"
		license_url = "N/A"
		logic_hash = "b93a8e88d597aee090f71e856059643fefb0e2359d012ce6c32dd3dedf782b28"
		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 = { 488bfa ff15???????? ffc0 4863d0 }
		$sequence_1 = { 488d4d20 e8???????? 90 4883bd9800000010 720c 488b8d80000000 }
		$sequence_2 = { 33c0 498bce 488bfb 66f2af 48f7d1 4c8d41ff 488bd3 }
		$sequence_3 = { 41b802000000 48c744245007000000 4c89742448 664489742438 e8???????? }
		$sequence_4 = { eb1a 4d85f6 7515 4c897310 }
		$sequence_5 = { 488bc8 4c8d442460 418d542428 ff15???????? 85c0 745f 4c8d4574 }
		$sequence_6 = { eb03 498bc6 803c303d 0f84be010000 4883f910 7205 498b06 }
		$sequence_7 = { 0f84bf010000 48895c2420 4d8bcd 4d8bc4 }
		$sequence_8 = { 33c0 e9???????? 8975e4 33c0 39b8a0080210 0f8491000000 ff45e4 }
		$sequence_9 = { bf0f000000 8bc6 897c2430 895c242c }
		$sequence_10 = { 83ec1c 8bcc 89a520feffff 33db }
		$sequence_11 = { c745fc01000000 e9???????? 8b11 8b421c ffd0 c745fc01000000 eb74 }
		$sequence_12 = { 2d08030000 7435 83e805 0f8510010000 }
		$sequence_13 = { 57 83c170 e8???????? 57 e8???????? 83c404 }
		$sequence_14 = { 03f7 c745f001000000 e8???????? 6a20 8d5f10 56 895e38 }
		$sequence_15 = { 52 8d8da4feffff 51 a3???????? 33db c785a4feffff01000600 }

	condition:
		7 of them and filesize < 462848
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 488bfa ff15???????? ffc0 4863d0 }
$sequence_1hex{ 488d4d20 e8???????? 90 4883bd9800000010 720c 488b8d80000000 }
$sequence_2hex{ 33c0 498bce 488bfb 66f2af 48f7d1 4c8d41ff 488bd3 }
$sequence_3hex{ 41b802000000 48c744245007000000 4c89742448 664489742438 e8???????? }
$sequence_4hex{ eb1a 4d85f6 7515 4c897310 }
$sequence_5hex{ 488bc8 4c8d442460 418d542428 ff15???????? 85c0 745f 4c8d4574 }
$sequence_6hex{ eb03 498bc6 803c303d 0f84be010000 4883f910 7205 498b06 }
$sequence_7hex{ 0f84bf010000 48895c2420 4d8bcd 4d8bc4 }
$sequence_8hex{ 33c0 e9???????? 8975e4 33c0 39b8a0080210 0f8491000000 ff45e4 }
$sequence_9hex{ bf0f000000 8bc6 897c2430 895c242c }
$sequence_10hex{ 83ec1c 8bcc 89a520feffff 33db }
$sequence_11hex{ c745fc01000000 e9???????? 8b11 8b421c ffd0 c745fc01000000 eb74 }
$sequence_12hex{ 2d08030000 7435 83e805 0f8510010000 }
$sequence_13hex{ 57 83c170 e8???????? 57 e8???????? 83c404 }
$sequence_14hex{ 03f7 c745f001000000 e8???????? 6a20 8d5f10 56 895e38 }
$sequence_15hex{ 52 8d8da4feffff 51 a3???????? 33db c785a4feffff01000600 }

Condition

7 of them and filesize < 462848

In plain words (Heuristic)

  • The file must be smaller than 462848 (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: e0393d3c-afd5-55e5-83bc-a6ecb5781a61

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