rule win_ave_maria_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-08-17"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ave_maria"
        malpedia_rule_date = "20200817"
        malpedia_hash = "8c895fd01eccb47a6225bcb1a3ba53cbb98644c5"
        malpedia_version = "20200817"
        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 / approach 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 = { 03c8 8955f0 8b458c 03cb 8bd8 894df4 c1c008 }
            // n = 7, score = 200
            //   03c8                 | add                 ecx, eax
            //   8955f0               | mov                 dword ptr [ebp - 0x10], edx
            //   8b458c               | mov                 eax, dword ptr [ebp - 0x74]
            //   03cb                 | add                 ecx, ebx
            //   8bd8                 | mov                 ebx, eax
            //   894df4               | mov                 dword ptr [ebp - 0xc], ecx
            //   c1c008               | rol                 eax, 8

        $sequence_1 = { ff15???????? 33c0 40 c9 c3 c3 55 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   33c0                 | xor                 eax, eax
            //   40                   | inc                 eax
            //   c9                   | leave               
            //   c3                   | ret                 
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_2 = { 8bf9 ff15???????? 6a00 6a24 8d85d0fdffff 50 ff15???????? }
            // n = 7, score = 200
            //   8bf9                 | mov                 edi, ecx
            //   ff15????????         |                     
            //   6a00                 | push                0
            //   6a24                 | push                0x24
            //   8d85d0fdffff         | lea                 eax, [ebp - 0x230]
            //   50                   | push                eax
            //   ff15????????         |                     

        $sequence_3 = { 50 8d4da4 e8???????? 8b4dbc e8???????? 8b8d78ffffff 895dbc }
            // n = 7, score = 200
            //   50                   | push                eax
            //   8d4da4               | lea                 ecx, [ebp - 0x5c]
            //   e8????????           |                     
            //   8b4dbc               | mov                 ecx, dword ptr [ebp - 0x44]
            //   e8????????           |                     
            //   8b8d78ffffff         | mov                 ecx, dword ptr [ebp - 0x88]
            //   895dbc               | mov                 dword ptr [ebp - 0x44], ebx

        $sequence_4 = { 5b c9 c20400 8b01 c3 832100 }
            // n = 6, score = 200
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c20400               | ret                 4
            //   8b01                 | mov                 eax, dword ptr [ecx]
            //   c3                   | ret                 
            //   832100               | and                 dword ptr [ecx], 0

        $sequence_5 = { 8b432c 8d4dc4 03c6 50 e8???????? 8d45c4 50 }
            // n = 7, score = 200
            //   8b432c               | mov                 eax, dword ptr [ebx + 0x2c]
            //   8d4dc4               | lea                 ecx, [ebp - 0x3c]
            //   03c6                 | add                 eax, esi
            //   50                   | push                eax
            //   e8????????           |                     
            //   8d45c4               | lea                 eax, [ebp - 0x3c]
            //   50                   | push                eax

        $sequence_6 = { 8d8d2cffffff e8???????? ff75ca 8b4de8 ff75c0 ff75c4 ff7508 }
            // n = 7, score = 200
            //   8d8d2cffffff         | lea                 ecx, [ebp - 0xd4]
            //   e8????????           |                     
            //   ff75ca               | push                dword ptr [ebp - 0x36]
            //   8b4de8               | mov                 ecx, dword ptr [ebp - 0x18]
            //   ff75c0               | push                dword ptr [ebp - 0x40]
            //   ff75c4               | push                dword ptr [ebp - 0x3c]
            //   ff7508               | push                dword ptr [ebp + 8]

        $sequence_7 = { ff15???????? ff75f8 ff15???????? 68???????? 68???????? e8???????? 85c0 }
            // n = 7, score = 200
            //   ff15????????         |                     
            //   ff75f8               | push                dword ptr [ebp - 8]
            //   ff15????????         |                     
            //   68????????           |                     
            //   68????????           |                     
            //   e8????????           |                     
            //   85c0                 | test                eax, eax

        $sequence_8 = { e8???????? 50 56 8d4b10 e8???????? 5f }
            // n = 6, score = 200
            //   e8????????           |                     
            //   50                   | push                eax
            //   56                   | push                esi
            //   8d4b10               | lea                 ecx, [ebx + 0x10]
            //   e8????????           |                     
            //   5f                   | pop                 edi

        $sequence_9 = { 8945d0 8bc2 33c6 894df8 33c7 c1c105 034dd0 }
            // n = 7, score = 200
            //   8945d0               | mov                 dword ptr [ebp - 0x30], eax
            //   8bc2                 | mov                 eax, edx
            //   33c6                 | xor                 eax, esi
            //   894df8               | mov                 dword ptr [ebp - 8], ecx
            //   33c7                 | xor                 eax, edi
            //   c1c105               | rol                 ecx, 5
            //   034dd0               | add                 ecx, dword ptr [ebp - 0x30]

    condition:
        7 of them and filesize < 237568
}