rule win_mayberobot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.mayberobot."
        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.mayberobot"
        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 = { 488d1588a80100 488b4c2430 e8???????? 488b442430 488d0d4a310100 488908 }
            // n = 6, score = 100
            //   488d1588a80100       | dec                 ecx
            //   488b4c2430           | add                 ebp, eax
            //   e8????????           |                     
            //   488b442430           | dec                 ecx
            //   488d0d4a310100       | mov                 esi, eax
            //   488908               | inc                 ecx

        $sequence_1 = { 488d15ff8c0000 b912000000 4c8d05eb8c0000 e8???????? }
            // n = 4, score = 100
            //   488d15ff8c0000       | dec                 eax
            //   b912000000           | stosd               dword ptr es:[edi], eax
            //   4c8d05eb8c0000       | dec                 esp
            //   e8????????           |                     

        $sequence_2 = { 83f8ff 7425 488d155aa60100 8bc8 e8???????? }
            // n = 5, score = 100
            //   83f8ff               | lea                 ecx, [0x101f9]
            //   7425                 | xorps               xmm0, xmm0
            //   488d155aa60100       | dec                 eax
            //   8bc8                 | sub                 esp, 0x20
            //   e8????????           |                     

        $sequence_3 = { 41f6c101 7427 0fb60a 83e10f 4a0fbe841910440100 428a8c1920440100 }
            // n = 6, score = 100
            //   41f6c101             | dec                 eax
            //   7427                 | lea                 eax, [0x1058f]
            //   0fb60a               | dec                 eax
            //   83e10f               | mov                 ecx, ebx
            //   4a0fbe841910440100     | dec    eax
            //   428a8c1920440100     | test                eax, eax

        $sequence_4 = { 744f e8???????? e8???????? e8???????? 488d15720f0100 488d0d4b0f0100 }
            // n = 6, score = 100
            //   744f                 | dec                 eax
            //   e8????????           |                     
            //   e8????????           |                     
            //   e8????????           |                     
            //   488d15720f0100       | lea                 edi, [0x3223]
            //   488d0d4b0f0100       | dec                 ebp

        $sequence_5 = { 488d05ab010100 488bf9 488901 8bda 4883c108 }
            // n = 5, score = 100
            //   488d05ab010100       | jmp                 0x1616
            //   488bf9               | dec                 eax
            //   488901               | lea                 ecx, [esp + 0x68]
            //   8bda                 | mov                 dword ptr [esp + 0x24], eax
            //   4883c108             | dec                 eax

        $sequence_6 = { e8???????? 448b0f 33d2 4585c9 0f84c2000000 4c8b4708 4c8d159db6ffff }
            // n = 7, score = 100
            //   e8????????           |                     
            //   448b0f               | dec                 eax
            //   33d2                 | mov                 eax, dword ptr [esp + 0x40]
            //   4585c9               | dec                 eax
            //   0f84c2000000         | lea                 edx, [0x19d63]
            //   4c8b4708             | dec                 eax
            //   4c8d159db6ffff       | mov                 ecx, eax

        $sequence_7 = { 4c8d1d57fcfeff 4181f8e9fd0000 0f857a010000 8bd7 4c8bf7 }
            // n = 5, score = 100
            //   4c8d1d57fcfeff       | inc                 ecx
            //   4181f8e9fd0000       | mov                 eax, dword ptr [edx - 4]
            //   0f857a010000         | shr                 eax, cl
            //   8bd7                 | dec                 ebp
            //   4c8bf7               | mov                 dword ptr [eax + 8], edx

        $sequence_8 = { 488b05???????? 488d15a6b2ffff 483bc2 7423 65488b042530000000 488b8998000000 }
            // n = 6, score = 100
            //   488b05????????       |                     
            //   488d15a6b2ffff       | dec                 eax
            //   483bc2               | mov                 eax, ebx
            //   7423                 | dec                 eax
            //   65488b042530000000     | add    esp, 0x20
            //   488b8998000000       | movups              xmmword ptr [ecx + 0x70], xmm0

        $sequence_9 = { e8???????? 4885c0 7509 488d05233a0100 eb04 4883c024 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   4885c0               | dec                 eax
            //   7509                 | mov                 edx, dword ptr [esp + 0x58]
            //   488d05233a0100       | dec                 eax
            //   eb04                 | mov                 ecx, dword ptr [esp + 0x60]
            //   4883c024             | dec                 eax

    condition:
        7 of them and filesize < 307200
}