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MALPEDIA_Win_Sepulcher_Auto

autogenerated rule brought to you by yara-signator

MalwareSepulcherMalpedia 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: Sepulcher.

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

Summary generated from the rule's metadata and condition.

Rule source

win-sepulcher-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Sepulcher_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a6431b51-e633-5c7f-aae9-b755f6d76c30"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.sepulcher"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.sepulcher_auto.yar#L1-L125"
		license_url = "N/A"
		logic_hash = "29a2e79b7f9b4200c42a42b4ebc98c4eddd3e5b31679b40d2090401136cf8e8a"
		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 = { 8bf9 0fb64722 83e801 7439 }
		$sequence_1 = { e8???????? 85c0 0f8434030000 6828080000 33ff 8d85ccf7ffff 57 }
		$sequence_2 = { 741c 85db 7507 c746346c5c0110 57 ff7634 c6463c01 }
		$sequence_3 = { 8b4508 83c40c 89851cd8ffff 8b8618250000 898540d8ffff }
		$sequence_4 = { 8a1c01 eb40 8a5dff eb3b 8b4f30 8b4718 f6c101 }
		$sequence_5 = { 8d8424f0040000 50 ffd6 6a10 59 }
		$sequence_6 = { 7437 3df2030000 7530 56 6a00 68???????? eb1c }
		$sequence_7 = { 59 6a25 8bfa f3ab 59 6a64 58 }
		$sequence_8 = { 56 50 68???????? 8d8424d4710000 6800040000 50 }
		$sequence_9 = { 7428 ba00010000 663bc2 741e ba00020000 663bc2 }

	condition:
		7 of them and filesize < 279552
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 8bf9 0fb64722 83e801 7439 }
$sequence_1hex{ e8???????? 85c0 0f8434030000 6828080000 33ff 8d85ccf7ffff 57 }
$sequence_2hex{ 741c 85db 7507 c746346c5c0110 57 ff7634 c6463c01 }
$sequence_3hex{ 8b4508 83c40c 89851cd8ffff 8b8618250000 898540d8ffff }
$sequence_4hex{ 8a1c01 eb40 8a5dff eb3b 8b4f30 8b4718 f6c101 }
$sequence_5hex{ 8d8424f0040000 50 ffd6 6a10 59 }
$sequence_6hex{ 7437 3df2030000 7530 56 6a00 68???????? eb1c }
$sequence_7hex{ 59 6a25 8bfa f3ab 59 6a64 58 }
$sequence_8hex{ 56 50 68???????? 8d8424d4710000 6800040000 50 }
$sequence_9hex{ 7428 ba00010000 663bc2 741e ba00020000 663bc2 }

Condition

7 of them and filesize < 279552

In plain words (Heuristic)

  • The file must be smaller than 279552 (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: a6431b51-e633-5c7f-aae9-b755f6d76c30

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