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MALPEDIA_Win_Skip20_Auto

autogenerated rule brought to you by yara-signator

MalwareSkip20Malpedia 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: Skip20.

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

Summary generated from the rule's metadata and condition.

Rule source

win-skip20-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Skip20_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "dec3df97-f40d-5bae-a6a2-881223bbed7d"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.skip20"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.skip20_auto.yar#L1-L128"
		license_url = "N/A"
		logic_hash = "0d60cab65a8ce67ba53815adb84ac11ab0ddeeeabb42f5358aceef35f5f8b7f3"
		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 = { b808000000 668944bb24 66834b1820 ff4d18 0f8854fcffff 488b4510 480fbe08 }
		$sequence_1 = { 488bdf 4c8bef 49c1fd05 4c8d350cff0400 }
		$sequence_2 = { 807a2201 7406 807a2601 7520 440fb74220 4181f86c030000 7f40 }
		$sequence_3 = { 488b4110 480fbf08 48894e08 4883471002 e9???????? 4c8d05f1a2ffff 83fa04 }
		$sequence_4 = { 4183f902 7505 4183483804 f6c104 7405 4183483810 4983c202 }
		$sequence_5 = { 0f8440010000 b900010000 e9???????? 8b842498000000 4585e4 754a 83f805 }
		$sequence_6 = { 418bb482a08a0100 eb07 4c8d15b4b2ffff 8bd6 81e200004000 747e 41ff4c2418 }
		$sequence_7 = { 56 57 4154 4155 4156 4883ec38 418bf1 }
		$sequence_8 = { 0f8492000000 4889442450 488d153ef0ffff 488bc8 e8???????? }
		$sequence_9 = { 488bcb e8???????? 4885c0 0f847affffff 8b15???????? 488d0c52 }

	condition:
		7 of them and filesize < 794624
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ b808000000 668944bb24 66834b1820 ff4d18 0f8854fcffff 488b4510 480fbe08 }
$sequence_1hex{ 488bdf 4c8bef 49c1fd05 4c8d350cff0400 }
$sequence_2hex{ 807a2201 7406 807a2601 7520 440fb74220 4181f86c030000 7f40 }
$sequence_3hex{ 488b4110 480fbf08 48894e08 4883471002 e9???????? 4c8d05f1a2ffff 83fa04 }
$sequence_4hex{ 4183f902 7505 4183483804 f6c104 7405 4183483810 4983c202 }
$sequence_5hex{ 0f8440010000 b900010000 e9???????? 8b842498000000 4585e4 754a 83f805 }
$sequence_6hex{ 418bb482a08a0100 eb07 4c8d15b4b2ffff 8bd6 81e200004000 747e 41ff4c2418 }
$sequence_7hex{ 56 57 4154 4155 4156 4883ec38 418bf1 }
$sequence_8hex{ 0f8492000000 4889442450 488d153ef0ffff 488bc8 e8???????? }
$sequence_9hex{ 488bcb e8???????? 4885c0 0f847affffff 8b15???????? 488d0c52 }

Condition

7 of them and filesize < 794624

In plain words (Heuristic)

  • The file must be smaller than 794624 (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: dec3df97-f40d-5bae-a6a2-881223bbed7d

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