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MALPEDIA_Win_Oatboat_Auto

autogenerated rule brought to you by yara-signator

MalwareOatboatMalpedia 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: Oatboat.

It defines 8 patterns (0 text, 8 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-oatboat-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Oatboat_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "b70deb15-907c-57e5-93db-769ef748fca1"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.oatboat"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.oatboat_auto.yar#L1-L110"
		license_url = "N/A"
		logic_hash = "4fd89130628ae6dae46c069641713f47111051d9b2170bf05ebbd8e8d8374841"
		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 = { c745e872747561 c745ec6c4d656d c745f06f727900 e8???????? 41b900800000 4c8d4540 488d5548 }
		$sequence_1 = { 4c896538 c745e04e74416c c745e46c6f6361 c745e874655669 c745ec72747561 c745f06c4d656d }
		$sequence_2 = { 488d48d8 c740dc64006c00 33db c740e06c002e00 c740e464006c00 c740e86c000000 e8???????? }
		$sequence_3 = { 55 4156 4157 488bec 4883ec30 65488b042560000000 }
		$sequence_4 = { c740e86c000000 e8???????? 4885c0 740e 488bd7 488bc8 }
		$sequence_5 = { e8???????? 488bd8 488b7c2458 488bc3 488b5c2450 4883c440 5d }
		$sequence_6 = { c745f04c6f6164 c745f44c696272 c745f861727957 44887dfc e8???????? 488bcf }
		$sequence_7 = { 66895df8 c745e845004c00 c745ec33003200 c745f02e004400 c745f44c004c00 e8???????? 4885c0 }

	condition:
		7 of them and filesize < 58368
}

Strings (8 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ c745e872747561 c745ec6c4d656d c745f06f727900 e8???????? 41b900800000 4c8d4540 488d5548 }
$sequence_1hex{ 4c896538 c745e04e74416c c745e46c6f6361 c745e874655669 c745ec72747561 c745f06c4d656d }
$sequence_2hex{ 488d48d8 c740dc64006c00 33db c740e06c002e00 c740e464006c00 c740e86c000000 e8???????? }
$sequence_3hex{ 55 4156 4157 488bec 4883ec30 65488b042560000000 }
$sequence_4hex{ c740e86c000000 e8???????? 4885c0 740e 488bd7 488bc8 }
$sequence_5hex{ e8???????? 488bd8 488b7c2458 488bc3 488b5c2450 4883c440 5d }
$sequence_6hex{ c745f04c6f6164 c745f44c696272 c745f861727957 44887dfc e8???????? 488bcf }
$sequence_7hex{ 66895df8 c745e845004c00 c745ec33003200 c745f02e004400 c745f44c004c00 e8???????? 4885c0 }

Condition

7 of them and filesize < 58368

In plain words (Heuristic)

  • The file must be smaller than 58368 (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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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: b70deb15-907c-57e5-93db-769ef748fca1

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