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MALPEDIA_Win_Portdoor_Auto

autogenerated rule brought to you by yara-signator

MalwarePortdoorMalpedia 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: Portdoor.

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

Summary generated from the rule's metadata and condition.

Rule source

win-portdoor-auto.yarCreative Commons Attribution-ShareAlike 4.0
rule MALPEDIA_Win_Portdoor_Auto : FILE
{
	meta:
		description = "autogenerated rule brought to you by yara-signator"
		author = "Felix Bilstein - yara-signator at cocacoding dot com"
		id = "a40c10b1-235a-55ec-95b5-4cdbbf235ce6"
		date = "2026-05-04"
		modified = "2026-05-18"
		reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.portdoor"
		source_url = "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.portdoor_auto.yar#L1-L127"
		license_url = "N/A"
		logic_hash = "3173641723a4083ca793307c4ec809672142abfaeaab61ddcafdcbfd45695b6b"
		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???????? a1???????? 83c40c 814dd400010000 8945e8 8945e4 a1???????? }
		$sequence_1 = { ddd8 db2d???????? b801000000 833d????????00 0f8586480000 ba05000000 8d0d80f70110 }
		$sequence_2 = { 8b1d???????? 33c9 6a0f 58 894619 894e15 }
		$sequence_3 = { 8b0d???????? e8???????? 0fb6c0 85c0 7502 ebaf }
		$sequence_4 = { 8d0c45c4070210 8bc1 2d???????? d1f8 2bf0 56 }
		$sequence_5 = { 8be5 5d c3 a1???????? 8a4004 c3 55 }
		$sequence_6 = { 43 8d4908 e8???????? 3d00f00000 7d12 8d8570fbffff }
		$sequence_7 = { 8b45f8 0345fc 0fb600 35fe000000 8b4df8 034dfc }
		$sequence_8 = { 0f8486000000 836de410 0f849d000000 e9???????? 8b45e0 }
		$sequence_9 = { ff36 33db 53 6a01 ff5778 85c0 7409 }

	condition:
		7 of them and filesize < 297984
}

Strings (10 patterns)

IdentifierTypeValueModifiers
$sequence_0hex{ e8???????? a1???????? 83c40c 814dd400010000 8945e8 8945e4 a1???????? }
$sequence_1hex{ ddd8 db2d???????? b801000000 833d????????00 0f8586480000 ba05000000 8d0d80f70110 }
$sequence_2hex{ 8b1d???????? 33c9 6a0f 58 894619 894e15 }
$sequence_3hex{ 8b0d???????? e8???????? 0fb6c0 85c0 7502 ebaf }
$sequence_4hex{ 8d0c45c4070210 8bc1 2d???????? d1f8 2bf0 56 }
$sequence_5hex{ 8be5 5d c3 a1???????? 8a4004 c3 55 }
$sequence_6hex{ 43 8d4908 e8???????? 3d00f00000 7d12 8d8570fbffff }
$sequence_7hex{ 8b45f8 0345fc 0fb600 35fe000000 8b4df8 034dfc }
$sequence_8hex{ 0f8486000000 836de410 0f849d000000 e9???????? 8b45e0 }
$sequence_9hex{ ff36 33db 53 6a01 ff5778 85c0 7409 }

Condition

7 of them and filesize < 297984

In plain words (Heuristic)

  • The file must be smaller than 297984 (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: a40c10b1-235a-55ec-95b5-4cdbbf235ce6

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