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MALPEDIA_Win_Ldr4_Auto

autogenerated rule brought to you by yara-signator

MalwareLdr4Malpedia 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

Associated malware family: Ldr4.

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

Summary generated from the rule's metadata and condition.

Rule source

win-ldr4-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Ldr4_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "70f63792-fb12-5dc9-8e1c-cdcecc2cc034"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ldr4"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.ldr4_auto.yar#L1-L126"
		license_url = "N/A"
		logic_hash = "efd08753414b7d9502b38de382596116e13607d37b302ea183aff8415d3508d2"
		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 = { eb01 41 80fb3b 7506 85ff 7522 }
		$sequence_1 = { 33db 897d1c 8b4510 6a10 59 894dfc }
		$sequence_2 = { 50 ff15???????? 8b45f0 b90046c323 f7e1 0145e4 8b45e4 }
		$sequence_3 = { 56 56 6a1c 51 ff7508 ffd0 eb02 }
		$sequence_4 = { 8b4064 85c0 7403 56 }
		$sequence_5 = { c20400 55 8bec 51 51 8b4d08 8b413c }
		$sequence_6 = { 8bc6 e8???????? 85c0 7410 c60000 40 8a08 }
		$sequence_7 = { e9???????? 33db 43 8b4508 }
		$sequence_8 = { 57 895df4 e8???????? 83c40c 6a02 58 668907 }
		$sequence_9 = { 8b4618 85c0 7407 50 ff15???????? 56 6a00 }

	condition:
		7 of them and filesize < 117760
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ eb01 41 80fb3b 7506 85ff 7522 }
$sequence_1hex{ 33db 897d1c 8b4510 6a10 59 894dfc }
$sequence_2hex{ 50 ff15???????? 8b45f0 b90046c323 f7e1 0145e4 8b45e4 }
$sequence_3hex{ 56 56 6a1c 51 ff7508 ffd0 eb02 }
$sequence_4hex{ 8b4064 85c0 7403 56 }
$sequence_5hex{ c20400 55 8bec 51 51 8b4d08 8b413c }
$sequence_6hex{ 8bc6 e8???????? 85c0 7410 c60000 40 8a08 }
$sequence_7hex{ e9???????? 33db 43 8b4508 }
$sequence_8hex{ 57 895df4 e8???????? 83c40c 6a02 58 668907 }
$sequence_9hex{ 8b4618 85c0 7407 50 ff15???????? 56 6a00 }

Condition

7 of them and filesize < 117760

In plain words (Heuristic)

  • The file must be smaller than 117760 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

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Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

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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: 70f63792-fb12-5dc9-8e1c-cdcecc2cc034

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