Skip to content

YARA · Malpedia signator rules

MALPEDIA_Win_Oceansalt_Auto

autogenerated rule brought to you by yara-signator

MalwareOceansaltMalpedia 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: Oceansalt.

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

Summary generated from the rule's metadata and condition.

Rule source

win-oceansalt-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Oceansalt_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "f3f30d46-09bc-5976-949b-48f2d51cf5ea"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.oceansalt"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.oceansalt_auto.yar#L1-L167"
		license_url = "N/A"
		logic_hash = "eeb60cea9c143f55636431cb2279743329ec4e5e7acfd3778798b6d43fdbb915"
		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 = { 743c 6a00 56 ff15???????? 8b4d08 }
		$sequence_1 = { 50 51 8d95fcfbffff 6800020000 52 e8???????? 83c410 }
		$sequence_2 = { 8b95d4fdffff 8955f4 8d642400 6a00 6808010000 }
		$sequence_3 = { 57 6a00 6a00 6a00 6a04 53 }
		$sequence_4 = { 3bc1 7cf3 56 51 }
		$sequence_5 = { 8b4508 50 ff15???????? 85c0 750a ff15???????? 8be5 }
		$sequence_6 = { 8945fc 8b4d08 56 8d450c 50 }
		$sequence_7 = { 8b450c 56 6a00 6800000008 }
		$sequence_8 = { ff15???????? 4533c9 488d542420 458d4102 }
		$sequence_9 = { b81a000000 eb78 33c9 488d15afdf0000 48891401 4883c230 4883c108 }
		$sequence_10 = { 4889442458 4889442460 48895c2450 c744247068000000 e8???????? }
		$sequence_11 = { 458d4108 488d942450030000 ff15???????? 488d942450030000 488d0d36be0000 e8???????? }
		$sequence_12 = { 458d4107 488bcb ff15???????? 488b4c2428 4833cc }
		$sequence_13 = { ff15???????? 488b0d???????? 4c8d0d92150100 488d942400010000 }
		$sequence_14 = { 482bd8 660f1f840000000000 0fb601 48ffc1 }
		$sequence_15 = { 0f856efeffff 4903df 803b20 74f8 488d15ae960000 41b805000000 488bcb }

	condition:
		7 of them and filesize < 212992
}

Strings (16 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ 743c 6a00 56 ff15???????? 8b4d08 }
$sequence_1hex{ 50 51 8d95fcfbffff 6800020000 52 e8???????? 83c410 }
$sequence_2hex{ 8b95d4fdffff 8955f4 8d642400 6a00 6808010000 }
$sequence_3hex{ 57 6a00 6a00 6a00 6a04 53 }
$sequence_4hex{ 3bc1 7cf3 56 51 }
$sequence_5hex{ 8b4508 50 ff15???????? 85c0 750a ff15???????? 8be5 }
$sequence_6hex{ 8945fc 8b4d08 56 8d450c 50 }
$sequence_7hex{ 8b450c 56 6a00 6800000008 }
$sequence_8hex{ ff15???????? 4533c9 488d542420 458d4102 }
$sequence_9hex{ b81a000000 eb78 33c9 488d15afdf0000 48891401 4883c230 4883c108 }
$sequence_10hex{ 4889442458 4889442460 48895c2450 c744247068000000 e8???????? }
$sequence_11hex{ 458d4108 488d942450030000 ff15???????? 488d942450030000 488d0d36be0000 e8???????? }
$sequence_12hex{ 458d4107 488bcb ff15???????? 488b4c2428 4833cc }
$sequence_13hex{ ff15???????? 488b0d???????? 4c8d0d92150100 488d942400010000 }
$sequence_14hex{ 482bd8 660f1f840000000000 0fb601 48ffc1 }
$sequence_15hex{ 0f856efeffff 4903df 803b20 74f8 488d15ae960000 41b805000000 488bcb }

Condition

7 of them and filesize < 212992

In plain words (Heuristic)

  • The file must be smaller than 212992 (a cheap guard that skips large files).
  • At least 7 patterns in the rule must match.

Test this rule in your browser

Drop a file to scan it with this rule using YARA-X compiled to WebAssembly. Nothing is uploaded.

Drop a file here or click to chooseScanned locally with YARA-X. Files up to 200 MB.

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: f3f30d46-09bc-5976-949b-48f2d51cf5ea

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