rule win_voidoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        version = "1"
        description = "Detects win.voidoor."
        info = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.6.0"
        signator_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.voidoor"
        malpedia_rule_date = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        malpedia_license = "CC BY-SA 4.0"
        malpedia_sharing = "TLP:WHITE"

    /* DISCLAIMER
     * The strings used in this rule have been automatically selected from the
     * disassembly of memory dumps and unpacked files, using YARA-Signator.
     * The code and documentation is published here:
     * https://github.com/fxb-cocacoding/yara-signator
     * As Malpedia is used as data source, please note that for a given
     * number of families, only single samples are documented.
     * This likely impacts the degree of generalization these rules will offer.
     * Take the described generation method also into consideration when you
     * apply the rules in your use cases and assign them confidence levels.
     */


    strings:
        $sequence_0 = { c784246803000001010101 c784246c03000001010101 c784247003000001010101 c784247403000001010101 c784247803000001010101 c784247c03000001010101 c784248003000001010101 }
            // n = 7, score = 100
            //   c784246803000001010101     | mov    dword ptr [esp + 0x368], 0x1010101
            //   c784246c03000001010101     | mov    dword ptr [esp + 0x36c], 0x1010101
            //   c784247003000001010101     | mov    dword ptr [esp + 0x370], 0x1010101
            //   c784247403000001010101     | mov    dword ptr [esp + 0x374], 0x1010101
            //   c784247803000001010101     | mov    dword ptr [esp + 0x378], 0x1010101
            //   c784247c03000001010101     | mov    dword ptr [esp + 0x37c], 0x1010101
            //   c784248003000001010101     | mov    dword ptr [esp + 0x380], 0x1010101

        $sequence_1 = { c78580feffff45000000 c78584feffff45000000 c78588feffff45000000 c7459831313131 c7459c31313131 c745a031313131 c745a431313131 }
            // n = 7, score = 100
            //   c78580feffff45000000     | mov    dword ptr [ebp - 0x180], 0x45
            //   c78584feffff45000000     | mov    dword ptr [ebp - 0x17c], 0x45
            //   c78588feffff45000000     | mov    dword ptr [ebp - 0x178], 0x45
            //   c7459831313131       | mov                 dword ptr [ebp - 0x68], 0x31313131
            //   c7459c31313131       | mov                 dword ptr [ebp - 0x64], 0x31313131
            //   c745a031313131       | mov                 dword ptr [ebp - 0x60], 0x31313131
            //   c745a431313131       | mov                 dword ptr [ebp - 0x5c], 0x31313131

        $sequence_2 = { e8???????? 83c42c 85c0 75a2 56 ff15???????? 57 }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c42c               | add                 esp, 0x2c
            //   85c0                 | test                eax, eax
            //   75a2                 | jne                 0xffffffa4
            //   56                   | push                esi
            //   ff15????????         |                     
            //   57                   | push                edi

        $sequence_3 = { c6450c00 720b ff7524 e8???????? 83c404 8ac3 8b4df4 }
            // n = 7, score = 100
            //   c6450c00             | mov                 byte ptr [ebp + 0xc], 0
            //   720b                 | jb                  0xd
            //   ff7524               | push                dword ptr [ebp + 0x24]
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8ac3                 | mov                 al, bl
            //   8b4df4               | mov                 ecx, dword ptr [ebp - 0xc]

        $sequence_4 = { 660fd64008 e8???????? 83c420 52 50 68???????? 57 }
            // n = 7, score = 100
            //   660fd64008           | movq                qword ptr [eax + 8], xmm0
            //   e8????????           |                     
            //   83c420               | add                 esp, 0x20
            //   52                   | push                edx
            //   50                   | push                eax
            //   68????????           |                     
            //   57                   | push                edi

        $sequence_5 = { c785c4feffff31313131 c785c8feffff31313131 c785ccfeffff31313131 c785d0feffff31313100 e8???????? 83c404 8bc1 }
            // n = 7, score = 100
            //   c785c4feffff31313131     | mov    dword ptr [ebp - 0x13c], 0x31313131
            //   c785c8feffff31313131     | mov    dword ptr [ebp - 0x138], 0x31313131
            //   c785ccfeffff31313131     | mov    dword ptr [ebp - 0x134], 0x31313131
            //   c785d0feffff31313100     | mov    dword ptr [ebp - 0x130], 0x313131
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   8bc1                 | mov                 eax, ecx

        $sequence_6 = { c645fc0f e8???????? 83c404 c645fc11 83bd1ceeffff10 720e ffb508eeffff }
            // n = 7, score = 100
            //   c645fc0f             | mov                 byte ptr [ebp - 4], 0xf
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   c645fc11             | mov                 byte ptr [ebp - 4], 0x11
            //   83bd1ceeffff10       | cmp                 dword ptr [ebp - 0x11e4], 0x10
            //   720e                 | jb                  0x10
            //   ffb508eeffff         | push                dword ptr [ebp - 0x11f8]

        $sequence_7 = { ffb42410050000 8d8424a8020000 55 68???????? 6858020000 50 83c305 }
            // n = 7, score = 100
            //   ffb42410050000       | push                dword ptr [esp + 0x510]
            //   8d8424a8020000       | lea                 eax, [esp + 0x2a8]
            //   55                   | push                ebp
            //   68????????           |                     
            //   6858020000           | push                0x258
            //   50                   | push                eax
            //   83c305               | add                 ebx, 5

        $sequence_8 = { b815000000 0f44f0 ff742418 ff15???????? ff742424 ff15???????? 83c408 }
            // n = 7, score = 100
            //   b815000000           | mov                 eax, 0x15
            //   0f44f0               | cmove               esi, eax
            //   ff742418             | push                dword ptr [esp + 0x18]
            //   ff15????????         |                     
            //   ff742424             | push                dword ptr [esp + 0x24]
            //   ff15????????         |                     
            //   83c408               | add                 esp, 8

        $sequence_9 = { 33c0 e9???????? c7872811000001000000 8b464c 85c0 7411 50 }
            // n = 7, score = 100
            //   33c0                 | xor                 eax, eax
            //   e9????????           |                     
            //   c7872811000001000000     | mov    dword ptr [edi + 0x1128], 1
            //   8b464c               | mov                 eax, dword ptr [esi + 0x4c]
            //   85c0                 | test                eax, eax
            //   7411                 | je                  0x13
            //   50                   | push                eax

    condition:
        7 of them and filesize < 1744896
}