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MALPEDIA_Win_Portstarter_Auto

autogenerated rule brought to you by yara-signator

MalwarePortstarterMalpedia 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: Portstarter.

It defines 12 patterns (0 text, 12 hex, 0 regex).

Summary generated from the rule's metadata and condition.

Rule source

win-portstarter-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Portstarter_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "0cb0de91-0f00-504b-b858-4628740872a9"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.portstarter"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.portstarter_auto.yar#L1-L134"
		license_url = "N/A"
		logic_hash = "3f78ba69db52b055c0289e4eb33d8701a119eb5c4a41f7ae830f18ba08059434"
		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 = { e8???????? 488b7c2448 4c8b442430 c644247000 48c744247800000000 440f11bc2480000000 31c0 }
		$sequence_1 = { e8???????? 488b542460 4c8ba42498000000 418b44d408 488b8c24e8000000 4839c1 0f863d030000 }
		$sequence_2 = { e8???????? 488b542460 4c8ba42498000000 418b4cd408 488b9424c0000000 488b9c24c8000000 }
		$sequence_3 = { e8???????? 4889d8 4889f1 e8???????? 4c89c8 }
		$sequence_4 = { e8???????? 488b8c24a0000000 48894808 833d????????00 750d 488b942400010000 488910 }
		$sequence_5 = { e8???????? 4889f7 488b4f08 833d????????00 }
		$sequence_6 = { e8???????? 488b542418 488b7c2430 48895758 }
		$sequence_7 = { e8???????? 488b7c2450 48894f10 833d????????00 6690 7505 488907 }
		$sequence_8 = { 4863442430 486bc010 488d0de3061c00 4803c8 }
		$sequence_9 = { 41b800de1b00 488d15d02f0000 488d4c2420 e8???????? }
		$sequence_10 = { 488d0de3061c00 4803c8 488bc1 48634c2434 }
		$sequence_11 = { 4883ec48 8b442458 89442424 48c744242800000000 41b800de1b00 }

	condition:
		7 of them and filesize < 14221312
}

Strings (12 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? 488b7c2448 4c8b442430 c644247000 48c744247800000000 440f11bc2480000000 31c0 }
$sequence_1hex{ e8???????? 488b542460 4c8ba42498000000 418b44d408 488b8c24e8000000 4839c1 0f863d030000 }
$sequence_2hex{ e8???????? 488b542460 4c8ba42498000000 418b4cd408 488b9424c0000000 488b9c24c8000000 }
$sequence_3hex{ e8???????? 4889d8 4889f1 e8???????? 4c89c8 }
$sequence_4hex{ e8???????? 488b8c24a0000000 48894808 833d????????00 750d 488b942400010000 488910 }
$sequence_5hex{ e8???????? 4889f7 488b4f08 833d????????00 }
$sequence_6hex{ e8???????? 488b542418 488b7c2430 48895758 }
$sequence_7hex{ e8???????? 488b7c2450 48894f10 833d????????00 6690 7505 488907 }
$sequence_8hex{ 4863442430 486bc010 488d0de3061c00 4803c8 }
$sequence_9hex{ 41b800de1b00 488d15d02f0000 488d4c2420 e8???????? }
$sequence_10hex{ 488d0de3061c00 4803c8 488bc1 48634c2434 }
$sequence_11hex{ 4883ec48 8b442458 89442424 48c744242800000000 41b800de1b00 }

Condition

7 of them and filesize < 14221312

In plain words (Heuristic)

  • The file must be smaller than 14221312 (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: 0cb0de91-0f00-504b-b858-4628740872a9

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