rule win_ave_maria_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        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 = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        malpedia_license = "CC BY-NC-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 = { ffd0 83bdf4feffff02 7508 8b85e8feffff c9 c3 33c0 }
            // n = 7, score = 400
            //   ffd0                 | call                eax
            //   83bdf4feffff02       | cmp                 dword ptr [ebp - 0x10c], 2
            //   7508                 | jne                 0xa
            //   8b85e8feffff         | mov                 eax, dword ptr [ebp - 0x118]
            //   c9                   | leave               
            //   c3                   | ret                 
            //   33c0                 | xor                 eax, eax

        $sequence_1 = { 57 e8???????? 83c40c 85c0 7505 895e04 eb36 }
            // n = 7, score = 400
            //   57                   | push                edi
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   85c0                 | test                eax, eax
            //   7505                 | jne                 7
            //   895e04               | mov                 dword ptr [esi + 4], ebx
            //   eb36                 | jmp                 0x38

        $sequence_2 = { 8b08 6a01 50 ff510c 85c0 0f8437ffffff }
            // n = 6, score = 400
            //   8b08                 | mov                 ecx, dword ptr [eax]
            //   6a01                 | push                1
            //   50                   | push                eax
            //   ff510c               | call                dword ptr [ecx + 0xc]
            //   85c0                 | test                eax, eax
            //   0f8437ffffff         | je                  0xffffff3d

        $sequence_3 = { 8bfa 8bd9 e8???????? 33c9 3bc3 8d45f0 50 }
            // n = 7, score = 400
            //   8bfa                 | mov                 edi, edx
            //   8bd9                 | mov                 ebx, ecx
            //   e8????????           |                     
            //   33c9                 | xor                 ecx, ecx
            //   3bc3                 | cmp                 eax, ebx
            //   8d45f0               | lea                 eax, [ebp - 0x10]
            //   50                   | push                eax

        $sequence_4 = { c20800 55 8bec 8b4508 56 8bf1 894508 }
            // n = 7, score = 400
            //   c20800               | ret                 8
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   56                   | push                esi
            //   8bf1                 | mov                 esi, ecx
            //   894508               | mov                 dword ptr [ebp + 8], eax

        $sequence_5 = { c1ca02 c1c908 03fb 8b5dec 81e100ff00ff c1c008 25ff00ff00 }
            // n = 7, score = 400
            //   c1ca02               | ror                 edx, 2
            //   c1c908               | ror                 ecx, 8
            //   03fb                 | add                 edi, ebx
            //   8b5dec               | mov                 ebx, dword ptr [ebp - 0x14]
            //   81e100ff00ff         | and                 ecx, 0xff00ff00
            //   c1c008               | rol                 eax, 8
            //   25ff00ff00           | and                 eax, 0xff00ff

        $sequence_6 = { 8d3cb1 85f6 7412 8d7ffc 8b0f e8???????? 832700 }
            // n = 7, score = 400
            //   8d3cb1               | lea                 edi, [ecx + esi*4]
            //   85f6                 | test                esi, esi
            //   7412                 | je                  0x14
            //   8d7ffc               | lea                 edi, [edi - 4]
            //   8b0f                 | mov                 ecx, dword ptr [edi]
            //   e8????????           |                     
            //   832700               | and                 dword ptr [edi], 0

        $sequence_7 = { 8bd6 e8???????? 833e00 0f8453010000 8d7324 56 }
            // n = 6, score = 400
            //   8bd6                 | mov                 edx, esi
            //   e8????????           |                     
            //   833e00               | cmp                 dword ptr [esi], 0
            //   0f8453010000         | je                  0x159
            //   8d7324               | lea                 esi, [ebx + 0x24]
            //   56                   | push                esi

        $sequence_8 = { 8b4508 6a00 ff7004 ff30 ff710c ff15???????? }
            // n = 6, score = 400
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]
            //   6a00                 | push                0
            //   ff7004               | push                dword ptr [eax + 4]
            //   ff30                 | push                dword ptr [eax]
            //   ff710c               | push                dword ptr [ecx + 0xc]
            //   ff15????????         |                     

        $sequence_9 = { 5e 5b c9 c3 83611800 83611400 }
            // n = 6, score = 400
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   c9                   | leave               
            //   c3                   | ret                 
            //   83611800             | and                 dword ptr [ecx + 0x18], 0
            //   83611400             | and                 dword ptr [ecx + 0x14], 0

    condition:
        7 of them and filesize < 237568
}