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MALPEDIA_Win_Xfscashncr_Auto

autogenerated rule brought to you by yara-signator

MalwareXfscashncrMalpedia 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: Xfscashncr.

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

Summary generated from the rule's metadata and condition.

Rule source

win-xfscashncr-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Xfscashncr_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "67959928-435d-51a8-886a-05d309cc7e34"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.xfscashncr"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.xfscashncr_auto.yar#L1-L133"
		license_url = "N/A"
		logic_hash = "38d25d3277d16acd0ae222ce1c741d64603fcf05fcb8a79e50c3cbbc913f0abf"
		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 = { 89959cfbffff 83bd9cfbffff10 776a 8b859cfbffff 0fb688502c5100 ff248d382c5100 8b95f8fbffff }
		$sequence_1 = { 8b450c 50 8b4d08 51 e8???????? 83c410 68b90b0000 }
		$sequence_2 = { 898578ffffff 83bd78ffffff00 7526 68???????? 68???????? 6a00 68e9010000 }
		$sequence_3 = { e8???????? 59 c3 8d8dc0fdffff e9???????? 8b8d38feffff e9???????? }
		$sequence_4 = { 83c408 0fbf4df4 51 8d5510 52 e8???????? 83c408 }
		$sequence_5 = { 8b4de4 51 8b55f4 8b4248 50 8b4d08 }
		$sequence_6 = { ba01000000 6bd21a 81c2???????? 52 b801000000 6bc000 05???????? }
		$sequence_7 = { c745d801000000 c745d400000000 eb12 8b45d4 83c001 8945d4 8b4dd8 }
		$sequence_8 = { e8???????? 50 8d85c0fdffff 50 e8???????? 83c408 8985b8fdffff }
		$sequence_9 = { 8b4508 c1f805 8b4d08 83e11f c1e106 8b0485c0195700 88540824 }

	condition:
		7 of them and filesize < 3126272
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 89959cfbffff 83bd9cfbffff10 776a 8b859cfbffff 0fb688502c5100 ff248d382c5100 8b95f8fbffff }
$sequence_1hex{ 8b450c 50 8b4d08 51 e8???????? 83c410 68b90b0000 }
$sequence_2hex{ 898578ffffff 83bd78ffffff00 7526 68???????? 68???????? 6a00 68e9010000 }
$sequence_3hex{ e8???????? 59 c3 8d8dc0fdffff e9???????? 8b8d38feffff e9???????? }
$sequence_4hex{ 83c408 0fbf4df4 51 8d5510 52 e8???????? 83c408 }
$sequence_5hex{ 8b4de4 51 8b55f4 8b4248 50 8b4d08 }
$sequence_6hex{ ba01000000 6bd21a 81c2???????? 52 b801000000 6bc000 05???????? }
$sequence_7hex{ c745d801000000 c745d400000000 eb12 8b45d4 83c001 8945d4 8b4dd8 }
$sequence_8hex{ e8???????? 50 8d85c0fdffff 50 e8???????? 83c408 8985b8fdffff }
$sequence_9hex{ 8b4508 c1f805 8b4d08 83e11f c1e106 8b0485c0195700 88540824 }

Condition

7 of them and filesize < 3126272

In plain words (Heuristic)

  • The file must be smaller than 3126272 (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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Open in editor

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: 67959928-435d-51a8-886a-05d309cc7e34

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