rule win_andardoor_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 4863c7 442bc7 4803d0 4533c9 ff15???????? 85c0 }
            // n = 6, score = 200
            //   4863c7               | jmp                 0x18f4
            //   442bc7               | xor                 ecx, ecx
            //   4803d0               | xor                 edx, edx
            //   4533c9               | nop                 
            //   ff15????????         |                     
            //   85c0                 | movzx               eax, byte ptr [edx + ebx]

        $sequence_1 = { 3bc3 7d15 4863d3 41b842000000 488bcf ff15???????? }
            // n = 6, score = 200
            //   3bc3                 | lea                 eax, [edi - 1]
            //   7d15                 | mov                 dword ptr [esp + 0x44], edi
            //   4863d3               | dec                 eax
            //   41b842000000         | mov                 edx, dword ptr [esp + 0x40]
            //   488bcf               | dec                 eax
            //   ff15????????         |                     

        $sequence_2 = { 0f8c59ffffff 488b3d???????? 33f6 488d4f01 }
            // n = 4, score = 200
            //   0f8c59ffffff         | dec                 eax
            //   488b3d????????       |                     
            //   33f6                 | lea                 edx, [esp + 0x70]
            //   488d4f01             | dec                 eax

        $sequence_3 = { 488b0d???????? ebb3 33d2 488d4d80 }
            // n = 4, score = 200
            //   488b0d????????       |                     
            //   ebb3                 | mov                 dword ptr [ebp + 0x250], eax
            //   33d2                 | dec                 eax
            //   488d4d80             | sub                 esp, 0x870

        $sequence_4 = { 488b4f29 488d542420 41b808000000 4863c3 442bc3 4803d0 4533c9 }
            // n = 7, score = 200
            //   488b4f29             | test                al, al
            //   488d542420           | jne                 0x99
            //   41b808000000         | dec                 eax
            //   4863c3               | mov                 edx, dword ptr [esp + 0x40]
            //   442bc3               | dec                 eax
            //   4803d0               | mov                 ecx, edi
            //   4533c9               | dec                 esp

        $sequence_5 = { 40383d???????? 740f 488d95a0050000 488bcb e8???????? 4c8d442460 33c9 }
            // n = 7, score = 200
            //   40383d????????       |                     
            //   740f                 | mov                 edx, dword ptr [ebp + 0x740]
            //   488d95a0050000       | dec                 esp
            //   488bcb               | lea                 eax, [0x9819]
            //   e8????????           |                     
            //   4c8d442460           | dec                 ecx
            //   33c9                 | mov                 ecx, esi

        $sequence_6 = { 488b4b31 4885c9 740a ff15???????? 48897b31 488d4b01 }
            // n = 6, score = 200
            //   488b4b31             | inc                 ecx
            //   4885c9               | mov                 ebx, 0xe3
            //   740a                 | inc                 ecx
            //   ff15????????         |                     
            //   48897b31             | push                esi
            //   488d4b01             | xor                 ebp, ebp

        $sequence_7 = { 66833c4300 75f6 488d95c0000000 4883c9ff }
            // n = 4, score = 200
            //   66833c4300           | lea                 eax, [0x58a8]
            //   75f6                 | dec                 eax
            //   488d95c0000000       | cmp                 ecx, eax
            //   4883c9ff             | je                  0x877

        $sequence_8 = { 8d47ff 48c744243803000000 89442430 c744242865000000 4c8d4d90 4c89642420 }
            // n = 6, score = 200
            //   8d47ff               | dec                 ecx
            //   48c744243803000000     | ror    ecx, cl
            //   89442430             | dec                 eax
            //   c744242865000000     | lea                 ecx, [0x1bbaa]
            //   4c8d4d90             | dec                 esp
            //   4c89642420           | xor                 ecx, edx

        $sequence_9 = { 4883c002 4883f80a 75d6 e8???????? 488b4b08 4885c9 7405 }
            // n = 7, score = 200
            //   4883c002             | dec                 eax
            //   4883f80a             | lea                 ecx, [0xeb82]
            //   75d6                 | mov                 dword ptr [ebx + 0x50], eax
            //   e8????????           |                     
            //   488b4b08             | mov                 byte ptr [ebx + 0x54], 1
            //   4885c9               | jmp                 0xce8
            //   7405                 | mov                 dword ptr [ebx + 0x50], eax

    condition:
        7 of them and filesize < 339968
}