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MALPEDIA_Win_Wastedloader_Auto

autogenerated rule brought to you by yara-signator

MalwareWastedloaderMalpedia 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: Wastedloader.

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

Summary generated from the rule's metadata and condition.

Rule source

win-wastedloader-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Wastedloader_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "77a2ade8-76ac-5489-9bb2-292337810980"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.wastedloader"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.wastedloader_auto.yar#L1-L125"
		license_url = "N/A"
		logic_hash = "9f8caca5f314d306a16416a35fd4a4839e75a98e2820acfdeaabd9b8b5446868"
		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 = { 8b4df8 0fb75156 83ea54 8b45f8 66895056 b9b8000000 }
		$sequence_1 = { e74d b980344b51 7385 20e1 }
		$sequence_2 = { 1008 a6 660f1b09 0000 a7 7280 011cfd80edc199 }
		$sequence_3 = { 04ee 1dd1704c64 0ffda4e83d005d04 008b4c81d274 }
		$sequence_4 = { 98 fc b54c 90 b182 7c80 }
		$sequence_5 = { 6a3b 11c2 855cb412 8bb8181480c8 1808 007056 8b4c00f9 }
		$sequence_6 = { 037fc1 00e4 1ac7 7240 ad 58 2448 }
		$sequence_7 = { 6ac1 8b700b 2c85 a5 5b df8bd2687320 ef }
		$sequence_8 = { 2430 8b1c24 a1???????? b6f6 ff4565 f9 }
		$sequence_9 = { 1c34 83f4f0 0d844de3fd ff959ef9ff7b f34a 24f0 801abd }

	condition:
		7 of them and filesize < 2677760
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b4df8 0fb75156 83ea54 8b45f8 66895056 b9b8000000 }
$sequence_1hex{ e74d b980344b51 7385 20e1 }
$sequence_2hex{ 1008 a6 660f1b09 0000 a7 7280 011cfd80edc199 }
$sequence_3hex{ 04ee 1dd1704c64 0ffda4e83d005d04 008b4c81d274 }
$sequence_4hex{ 98 fc b54c 90 b182 7c80 }
$sequence_5hex{ 6a3b 11c2 855cb412 8bb8181480c8 1808 007056 8b4c00f9 }
$sequence_6hex{ 037fc1 00e4 1ac7 7240 ad 58 2448 }
$sequence_7hex{ 6ac1 8b700b 2c85 a5 5b df8bd2687320 ef }
$sequence_8hex{ 2430 8b1c24 a1???????? b6f6 ff4565 f9 }
$sequence_9hex{ 1c34 83f4f0 0d844de3fd ff959ef9ff7b f34a 24f0 801abd }

Condition

7 of them and filesize < 2677760

In plain words (Heuristic)

  • The file must be smaller than 2677760 (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: 77a2ade8-76ac-5489-9bb2-292337810980

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