rule win_byeby_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.byeby"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        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 = { 85c0 0f85da010000 68???????? 8d842440060000 50 }
            // n = 5, score = 100
            //   85c0                 | test                eax, eax
            //   0f85da010000         | jne                 0x1e0
            //   68????????           |                     
            //   8d842440060000       | lea                 eax, [esp + 0x640]
            //   50                   | push                eax

        $sequence_1 = { e8???????? 83c40c 8d85c4fcffff 6804010000 50 6a00 }
            // n = 6, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d85c4fcffff         | lea                 eax, [ebp - 0x33c]
            //   6804010000           | push                0x104
            //   50                   | push                eax
            //   6a00                 | push                0

        $sequence_2 = { 8d45ec c745ec766d756e 50 8d85c8feffff }
            // n = 4, score = 100
            //   8d45ec               | lea                 eax, [ebp - 0x14]
            //   c745ec766d756e       | mov                 dword ptr [ebp - 0x14], 0x6e756d76
            //   50                   | push                eax
            //   8d85c8feffff         | lea                 eax, [ebp - 0x138]

        $sequence_3 = { 7905 83cfff eb09 8bcf e8???????? 8bf8 }
            // n = 6, score = 100
            //   7905                 | jns                 7
            //   83cfff               | or                  edi, 0xffffffff
            //   eb09                 | jmp                 0xb
            //   8bcf                 | mov                 ecx, edi
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax

        $sequence_4 = { 89842490000000 8b4510 53 56 57 50 }
            // n = 6, score = 100
            //   89842490000000       | mov                 dword ptr [esp + 0x90], eax
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   50                   | push                eax

        $sequence_5 = { 037b74 c7437400000000 eb24 6a00 ff75a8 8d043e }
            // n = 6, score = 100
            //   037b74               | add                 edi, dword ptr [ebx + 0x74]
            //   c7437400000000       | mov                 dword ptr [ebx + 0x74], 0
            //   eb24                 | jmp                 0x26
            //   6a00                 | push                0
            //   ff75a8               | push                dword ptr [ebp - 0x58]
            //   8d043e               | lea                 eax, [esi + edi]

        $sequence_6 = { e8???????? 83c40c 8d84242c050000 68???????? 50 ff15???????? 8b35???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d84242c050000       | lea                 eax, [esp + 0x52c]
            //   68????????           |                     
            //   50                   | push                eax
            //   ff15????????         |                     
            //   8b35????????         |                     

        $sequence_7 = { ff15???????? c705????????ffffffff 6aff 57 ffd6 8b0d???????? 85c9 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   c705????????ffffffff     |     
            //   6aff                 | push                -1
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   8b0d????????         |                     
            //   85c9                 | test                ecx, ecx

        $sequence_8 = { 50 8d84246c020000 e9???????? 8d8424cc020000 }
            // n = 4, score = 100
            //   50                   | push                eax
            //   8d84246c020000       | lea                 eax, [esp + 0x26c]
            //   e9????????           |                     
            //   8d8424cc020000       | lea                 eax, [esp + 0x2cc]

        $sequence_9 = { 6a00 8d442440 50 8d842444060000 }
            // n = 4, score = 100
            //   6a00                 | push                0
            //   8d442440             | lea                 eax, [esp + 0x40]
            //   50                   | push                eax
            //   8d842444060000       | lea                 eax, [esp + 0x644]

    condition:
        7 of them and filesize < 253952
}