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MALPEDIA_Win_Xsplus_Auto

autogenerated rule brought to you by yara-signator

MalwareXsplusMalpedia 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: Xsplus.

It defines 17 patterns (0 text, 17 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-xsplus-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Xsplus_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "3f0d7ffb-6d2b-54bb-93e8-b91caf3d74ed"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.xsplus"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.xsplus_auto.yar#L1-L173"
		license_url = "N/A"
		logic_hash = "d1e503d1ee9e4435450731001eb709a9b8a9f116bfcacb3f4b0a409fd6faef6b"
		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 = { 8b761c 8b4608 8b7e20 8b36 66394f18 }
		$sequence_1 = { 39b810a84000 0f8491000000 ff45e4 83c030 }
		$sequence_2 = { 8945fc 837dfc00 7502 eb4c }
		$sequence_3 = { 8b8db4fdffff 81e9cd860100 898db4fdffff 83bdb4fdffff03 0f87c5000000 }
		$sequence_4 = { 83c201 8955f8 8b4514 8945f4 8b4df4 83c101 }
		$sequence_5 = { 8985e8fdffff 83bde8fdffff00 0f8c9d000000 8b5508 }
		$sequence_6 = { ff15???????? 83c408 85c0 7463 8b4d08 51 ff15???????? }
		$sequence_7 = { 8b4508 0345fc 8a08 880a c745f800000000 }
		$sequence_8 = { 8945f4 8b55fc 8b02 8b4dfc 51 ff5008 }
		$sequence_9 = { 8955e4 8b45e4 3b45d8 0f8d24010000 8b4de4 }
		$sequence_10 = { ff15???????? c745e0b4924000 c745dc58020000 8d55d4 52 6a00 6860100000 }
		$sequence_11 = { b801000000 e9???????? 6a00 ff15???????? b801000000 }
		$sequence_12 = { 8b55c8 52 e8???????? 83c408 85c0 0f85f8000000 }
		$sequence_13 = { 8b85a8feffff 898590feffff 8b8d90feffff 51 }
		$sequence_14 = { 8bec 81ec2c050000 57 c785f0fdffff04010000 }
		$sequence_15 = { c74668e0a34000 6a0d e8???????? 59 }
		$sequence_16 = { 8b5118 c1ea10 8b4508 8910 8be5 5d c20800 }

	condition:
		7 of them and filesize < 597872
}

Strings (17 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8b761c 8b4608 8b7e20 8b36 66394f18 }
$sequence_1hex{ 39b810a84000 0f8491000000 ff45e4 83c030 }
$sequence_2hex{ 8945fc 837dfc00 7502 eb4c }
$sequence_3hex{ 8b8db4fdffff 81e9cd860100 898db4fdffff 83bdb4fdffff03 0f87c5000000 }
$sequence_4hex{ 83c201 8955f8 8b4514 8945f4 8b4df4 83c101 }
$sequence_5hex{ 8985e8fdffff 83bde8fdffff00 0f8c9d000000 8b5508 }
$sequence_6hex{ ff15???????? 83c408 85c0 7463 8b4d08 51 ff15???????? }
$sequence_7hex{ 8b4508 0345fc 8a08 880a c745f800000000 }
$sequence_8hex{ 8945f4 8b55fc 8b02 8b4dfc 51 ff5008 }
$sequence_9hex{ 8955e4 8b45e4 3b45d8 0f8d24010000 8b4de4 }
$sequence_10hex{ ff15???????? c745e0b4924000 c745dc58020000 8d55d4 52 6a00 6860100000 }
$sequence_11hex{ b801000000 e9???????? 6a00 ff15???????? b801000000 }
$sequence_12hex{ 8b55c8 52 e8???????? 83c408 85c0 0f85f8000000 }
$sequence_13hex{ 8b85a8feffff 898590feffff 8b8d90feffff 51 }
$sequence_14hex{ 8bec 81ec2c050000 57 c785f0fdffff04010000 }
$sequence_15hex{ c74668e0a34000 6a0d e8???????? 59 }
$sequence_16hex{ 8b5118 c1ea10 8b4508 8910 8be5 5d c20800 }

Condition

7 of them and filesize < 597872

In plain words (Heuristic)

  • The file must be smaller than 597872 (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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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: 3f0d7ffb-6d2b-54bb-93e8-b91caf3d74ed

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