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MALPEDIA_Win_Ksl0T_Auto

autogenerated rule brought to you by yara-signator

MalwareKsl0TMalpedia 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: Ksl0T.

It defines 16 patterns (0 text, 16 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-ksl0t-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Ksl0T_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "2870abe6-5db4-5e5a-a968-46d1ac11caff"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ksl0t"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.ksl0t_auto.yar#L1-L173"
		license_url = "N/A"
		logic_hash = "e36653d3134f0d8f3891988f3daa92e765abf5eacde9d9ce4affe6397f1c8183"
		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 = { 52 53 894648 ffd7 89464c 8d842468020000 50 }
		$sequence_1 = { 85c0 7531 4c8d056c3d0000 488d0da6a70000 bafb020000 e8???????? 85c0 }
		$sequence_2 = { ffd7 89465c 8d442438 50 53 }
		$sequence_3 = { 888424d3020000 c68424d402000026 c68424d502000026 c68424d60200001c c68424d702000031 }
		$sequence_4 = { 4881c22c010000 41b804000000 488d0d05e40000 ff15???????? e9???????? 488d1533c10000 }
		$sequence_5 = { 488d8c2400030000 e8???????? ba18000000 488d8c24a0000000 e8???????? ba0d000000 488d8c2480030000 }
		$sequence_6 = { 4883c202 488d8c24b0020000 ff15???????? 488b8c2400090000 ff15???????? }
		$sequence_7 = { 8138a3000000 744c 488b442450 8138a2000000 743f 4881bc242816000000010000 }
		$sequence_8 = { c684248900000039 c684248a00000039 888c248b000000 c644244438 c644244526 }
		$sequence_9 = { c684246d01000027 889c246e010000 c684246f01000020 c684247001000034 c684247101000039 }
		$sequence_10 = { 03c0 50 8d85000c0000 50 68???????? }
		$sequence_11 = { 53 ff15???????? 85c0 0f85b6000000 6a1c 68???????? 57 }
		$sequence_12 = { 68???????? e8???????? 83c40c 8b9510150000 }
		$sequence_13 = { c684249500000036 c68424960000003a c684249700000031 c684249800000030 c684249900000010 }
		$sequence_14 = { 488dbc2492040000 33c0 b9fe030000 f3aa 33c0 }
		$sequence_15 = { 4c89442418 4889542410 48894c2408 4881ec08040000 488b05???????? 4833c4 48898424f0030000 }

	condition:
		7 of them and filesize < 196608
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 52 53 894648 ffd7 89464c 8d842468020000 50 }
$sequence_1hex{ 85c0 7531 4c8d056c3d0000 488d0da6a70000 bafb020000 e8???????? 85c0 }
$sequence_2hex{ ffd7 89465c 8d442438 50 53 }
$sequence_3hex{ 888424d3020000 c68424d402000026 c68424d502000026 c68424d60200001c c68424d702000031 }
$sequence_4hex{ 4881c22c010000 41b804000000 488d0d05e40000 ff15???????? e9???????? 488d1533c10000 }
$sequence_5hex{ 488d8c2400030000 e8???????? ba18000000 488d8c24a0000000 e8???????? ba0d000000 488d8c2480030000 }
$sequence_6hex{ 4883c202 488d8c24b0020000 ff15???????? 488b8c2400090000 ff15???????? }
$sequence_7hex{ 8138a3000000 744c 488b442450 8138a2000000 743f 4881bc242816000000010000 }
$sequence_8hex{ c684248900000039 c684248a00000039 888c248b000000 c644244438 c644244526 }
$sequence_9hex{ c684246d01000027 889c246e010000 c684246f01000020 c684247001000034 c684247101000039 }
$sequence_10hex{ 03c0 50 8d85000c0000 50 68???????? }
$sequence_11hex{ 53 ff15???????? 85c0 0f85b6000000 6a1c 68???????? 57 }
$sequence_12hex{ 68???????? e8???????? 83c40c 8b9510150000 }
$sequence_13hex{ c684249500000036 c68424960000003a c684249700000031 c684249800000030 c684249900000010 }
$sequence_14hex{ 488dbc2492040000 33c0 b9fe030000 f3aa 33c0 }
$sequence_15hex{ 4c89442418 4889542410 48894c2408 4881ec08040000 488b05???????? 4833c4 48898424f0030000 }

Condition

7 of them and filesize < 196608

In plain words (Heuristic)

  • The file must be smaller than 196608 (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: 2870abe6-5db4-5e5a-a968-46d1ac11caff

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