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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "f3f30d46-09bc-5976-949b-48f2d51cf5ea"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.oceansalt"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.oceansalt_auto.yar#L1-L167"
= "N/A"
= "eeb60cea9c143f55636431cb2279743329ec4e5e7acfd3778798b6d43fdbb915"
= 75
= 75
= "FILE"
= "1"
= "yara-signator v0.6.0"
= "callsandjumps;datarefs;binvalue"
= "20260422"
= "a182e35da64e6d71cb55f125c4d4225196523f14"
= "20260504"
= "CC BY-SA 4.0"
= "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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { 743c 6a00 56 ff15???????? 8b4d08 } | |
| $sequence_1 | hex | { 50 51 8d95fcfbffff 6800020000 52 e8???????? 83c410 } | |
| $sequence_2 | hex | { 8b95d4fdffff 8955f4 8d642400 6a00 6808010000 } | |
| $sequence_3 | hex | { 57 6a00 6a00 6a00 6a04 53 } | |
| $sequence_4 | hex | { 3bc1 7cf3 56 51 } | |
| $sequence_5 | hex | { 8b4508 50 ff15???????? 85c0 750a ff15???????? 8be5 } | |
| $sequence_6 | hex | { 8945fc 8b4d08 56 8d450c 50 } | |
| $sequence_7 | hex | { 8b450c 56 6a00 6800000008 } | |
| $sequence_8 | hex | { ff15???????? 4533c9 488d542420 458d4102 } | |
| $sequence_9 | hex | { b81a000000 eb78 33c9 488d15afdf0000 48891401 4883c230 4883c108 } | |
| $sequence_10 | hex | { 4889442458 4889442460 48895c2450 c744247068000000 e8???????? } | |
| $sequence_11 | hex | { 458d4108 488d942450030000 ff15???????? 488d942450030000 488d0d36be0000 e8???????? } | |
| $sequence_12 | hex | { 458d4107 488bcb ff15???????? 488b4c2428 4833cc } | |
| $sequence_13 | hex | { ff15???????? 488b0d???????? 4c8d0d92150100 488d942400010000 } | |
| $sequence_14 | hex | { 482bd8 660f1f840000000000 0fb601 48ffc1 } | |
| $sequence_15 | hex | { 0f856efeffff 4903df 803b20 74f8 488d15ae960000 41b805000000 488bcb } |
Condition
7 of them and filesize < 212992In 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.
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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)
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
| 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 |
Tags:FILE
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