YARA · Malpedia signator rules
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:
= "autogenerated rule brought to you by yara-signator"
= "Felix Bilstein - yara-signator at cocacoding dot com"
= "a40c10b1-235a-55ec-95b5-4cdbbf235ce6"
= "2026-05-04"
= "2026-05-18"
= "https://malpedia.caad.fkie.fraunhofer.de/details/win.portdoor"
= "https://github.com/malpedia/signator-rules//blob/c901f97b7df03e41917da74c2a84b04c227316c2/rules/win.portdoor_auto.yar#L1-L127"
= "N/A"
= "3173641723a4083ca793307c4ec809672142abfaeaab61ddcafdcbfd45695b6b"
= 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 = { 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)
| Identifier | Type | Value | Modifiers |
|---|---|---|---|
| $sequence_0 | hex | { e8???????? a1???????? 83c40c 814dd400010000 8945e8 8945e4 a1???????? } | |
| $sequence_1 | hex | { ddd8 db2d???????? b801000000 833d????????00 0f8586480000 ba05000000 8d0d80f70110 } | |
| $sequence_2 | hex | { 8b1d???????? 33c9 6a0f 58 894619 894e15 } | |
| $sequence_3 | hex | { 8b0d???????? e8???????? 0fb6c0 85c0 7502 ebaf } | |
| $sequence_4 | hex | { 8d0c45c4070210 8bc1 2d???????? d1f8 2bf0 56 } | |
| $sequence_5 | hex | { 8be5 5d c3 a1???????? 8a4004 c3 55 } | |
| $sequence_6 | hex | { 43 8d4908 e8???????? 3d00f00000 7d12 8d8570fbffff } | |
| $sequence_7 | hex | { 8b45f8 0345fc 0fb600 35fe000000 8b4df8 034dfc } | |
| $sequence_8 | hex | { 0f8486000000 836de410 0f849d000000 e9???????? 8b45e0 } | |
| $sequence_9 | hex | { ff36 33db 53 6a01 ff5778 85c0 7409 } |
Condition
7 of them and filesize < 297984In 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.
Test this rule in your browser
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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: a40c10b1-235a-55ec-95b5-4cdbbf235ce6
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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