rule win_andardoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.andardoor."
        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.andardoor"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { f20f59d7 f20f59d7 f20f59d7 66490f7ed0 }
            // n = 4, score = 200
            //   f20f59d7             | dec                 eax
            //   f20f59d7             | inc                 ecx
            //   f20f59d7             | jne                 0xe
            //   66490f7ed0           | xor                 al, al

        $sequence_1 = { 0f1f4000 40383d???????? 7517 b9c8000000 ff15???????? 488b1d???????? }
            // n = 6, score = 200
            //   0f1f4000             | test                cx, cx
            //   40383d????????       |                     
            //   7517                 | jne                 0x235
            //   b9c8000000           | xor                 edi, edi
            //   ff15????????         |                     
            //   488b1d????????       |                     

        $sequence_2 = { 488bc3 488bbc2410040000 488b8dc0020000 4833cc e8???????? }
            // n = 5, score = 200
            //   488bc3               | movzx               esi, byte ptr [edx + eax*4 + 0x18593]
            //   488bbc2410040000     | mov                 ebx, ecx
            //   488b8dc0020000       | mov                 edi, eax
            //   4833cc               | inc                 ecx
            //   e8????????           |                     

        $sequence_3 = { 4c896c2420 ff5018 85c0 7434 488b4d88 }
            // n = 5, score = 200
            //   4c896c2420           | je                  0xa17
            //   ff5018               | dec                 eax
            //   85c0                 | lea                 eax, [0x58a8]
            //   7434                 | dec                 eax
            //   488b4d88             | cmp                 ecx, eax

        $sequence_4 = { 48899c2480400000 4889bc2498400000 4c89bc2460400000 4983cfff }
            // n = 4, score = 200
            //   48899c2480400000     | dec                 eax
            //   4889bc2498400000     | add                 ebx, 8
            //   4c89bc2460400000     | dec                 eax
            //   4983cfff             | lea                 eax, [0x12160]

        $sequence_5 = { ff15???????? 488b0d???????? ff15???????? 33c0 eb47 488b442468 }
            // n = 6, score = 200
            //   ff15????????         |                     
            //   488b0d????????       |                     
            //   ff15????????         |                     
            //   33c0                 | cmp                 eax, 1
            //   eb47                 | sete                al
            //   488b442468           | jmp                 0x5be

        $sequence_6 = { 4803d6 4533c9 ff15???????? 85c0 7e25 b905000000 03d8 }
            // n = 7, score = 200
            //   4803d6               | xor                 al, al
            //   4533c9               | jmp                 0xb8
            //   ff15????????         |                     
            //   85c0                 | mov                 al, 1
            //   7e25                 | dec                 eax
            //   b905000000           | mov                 ebp, dword ptr [esp + 0x30]
            //   03d8                 | xor                 al, al

        $sequence_7 = { 40887dc8 488945c9 8bdf 488945d1 668945d9 }
            // n = 5, score = 200
            //   40887dc8             | inc                 ebp
            //   488945c9             | xor                 ecx, ecx
            //   8bdf                 | dec                 eax
            //   488945d1             | lea                 edx, [0x1121c]
            //   668945d9             | dec                 eax

        $sequence_8 = { 7507 33c0 e9???????? 4889bc24600d0000 ba00040000 4c89bc24680d0000 }
            // n = 6, score = 200
            //   7507                 | mov                 ebx, ecx
            //   33c0                 | sub                 edx, 1
            //   e9????????           |                     
            //   4889bc24600d0000     | je                  0x7be
            //   ba00040000           | cmp                 edx, 1
            //   4c89bc24680d0000     | jne                 0x7f6

        $sequence_9 = { 0f85c5000000 0fb74c4202 66413b4c4002 0f85b4000000 }
            // n = 4, score = 200
            //   0f85c5000000         | lea                 ecx, [0x1a75b]
            //   0fb74c4202           | nop                 word ptr [eax + eax]
            //   66413b4c4002         | xor                 edx, edx
            //   0f85b4000000         | je                  0xb7

    condition:
        7 of them and filesize < 339968
}