rule win_ave_maria_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ave_maria"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { 8945ec e8???????? 8d857cfdffff 50 ff7508 ff15???????? }
            // n = 6, score = 200
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   e8????????           |                     
            //   8d857cfdffff         | lea                 eax, [ebp - 0x284]
            //   50                   | push                eax
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff15????????         |                     

        $sequence_1 = { 57 895df8 8b4308 3b4304 7278 8d7001 }
            // n = 6, score = 200
            //   57                   | push                edi
            //   895df8               | mov                 dword ptr [ebp - 8], ebx
            //   8b4308               | mov                 eax, dword ptr [ebx + 8]
            //   3b4304               | cmp                 eax, dword ptr [ebx + 4]
            //   7278                 | jb                  0x7a
            //   8d7001               | lea                 esi, [eax + 1]

        $sequence_2 = { 7504 b301 eb02 32db 8b4dfc e8???????? 84db }
            // n = 7, score = 200
            //   7504                 | jne                 6
            //   b301                 | mov                 bl, 1
            //   eb02                 | jmp                 4
            //   32db                 | xor                 bl, bl
            //   8b4dfc               | mov                 ecx, dword ptr [ebp - 4]
            //   e8????????           |                     
            //   84db                 | test                bl, bl

        $sequence_3 = { ff75e8 ff5760 59 85c0 7415 8b4de8 e8???????? }
            // n = 7, score = 200
            //   ff75e8               | push                dword ptr [ebp - 0x18]
            //   ff5760               | call                dword ptr [edi + 0x60]
            //   59                   | pop                 ecx
            //   85c0                 | test                eax, eax
            //   7415                 | je                  0x17
            //   8b4de8               | mov                 ecx, dword ptr [ebp - 0x18]
            //   e8????????           |                     

        $sequence_4 = { 7516 09430c 33ff 8b4d08 e8???????? 8bc7 5f }
            // n = 7, score = 200
            //   7516                 | jne                 0x18
            //   09430c               | or                  dword ptr [ebx + 0xc], eax
            //   33ff                 | xor                 edi, edi
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   e8????????           |                     
            //   8bc7                 | mov                 eax, edi
            //   5f                   | pop                 edi

        $sequence_5 = { e8???????? 68???????? 8d4f20 e8???????? 8d4d08 51 8bc8 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   68????????           |                     
            //   8d4f20               | lea                 ecx, [edi + 0x20]
            //   e8????????           |                     
            //   8d4d08               | lea                 ecx, [ebp + 8]
            //   51                   | push                ecx
            //   8bc8                 | mov                 ecx, eax

        $sequence_6 = { 8d45fc 50 6a05 e8???????? 83c40c }
            // n = 5, score = 200
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   6a05                 | push                5
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_7 = { 33c6 c1c105 034dd0 23c7 33d0 c1cf02 }
            // n = 6, score = 200
            //   33c6                 | xor                 eax, esi
            //   c1c105               | rol                 ecx, 5
            //   034dd0               | add                 ecx, dword ptr [ebp - 0x30]
            //   23c7                 | and                 eax, edi
            //   33d0                 | xor                 edx, eax
            //   c1cf02               | ror                 edi, 2

        $sequence_8 = { 7409 ff770c ff15???????? 5f 8bc3 5b c9 }
            // n = 7, score = 200
            //   7409                 | je                  0xb
            //   ff770c               | push                dword ptr [edi + 0xc]
            //   ff15????????         |                     
            //   5f                   | pop                 edi
            //   8bc3                 | mov                 eax, ebx
            //   5b                   | pop                 ebx
            //   c9                   | leave               

        $sequence_9 = { 56 8d45f8 50 6a00 ff33 ff37 ff15???????? }
            // n = 7, score = 200
            //   56                   | push                esi
            //   8d45f8               | lea                 eax, [ebp - 8]
            //   50                   | push                eax
            //   6a00                 | push                0
            //   ff33                 | push                dword ptr [ebx]
            //   ff37                 | push                dword ptr [edi]
            //   ff15????????         |                     

    condition:
        7 of them and filesize < 237568
}