rule win_troldesh_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.troldesh"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { e8???????? 8b7d08 8d45c4 50 895dfc e8???????? 8d45dc }
            // n = 7, score = 600
            //   e8????????           |                     
            //   8b7d08               | mov                 edi, dword ptr [ebp + 8]
            //   8d45c4               | lea                 eax, [ebp - 0x3c]
            //   50                   | push                eax
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx
            //   e8????????           |                     
            //   8d45dc               | lea                 eax, [ebp - 0x24]

        $sequence_1 = { 8d443040 53 50 e8???????? 8b450c 0145fc 83c40c }
            // n = 7, score = 600
            //   8d443040             | lea                 eax, [eax + esi + 0x40]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   e8????????           |                     
            //   8b450c               | mov                 eax, dword ptr [ebp + 0xc]
            //   0145fc               | add                 dword ptr [ebp - 4], eax
            //   83c40c               | add                 esp, 0xc

        $sequence_2 = { eb2d 56 8bd8 8bca e8???????? 59 eb29 }
            // n = 7, score = 600
            //   eb2d                 | jmp                 0x2f
            //   56                   | push                esi
            //   8bd8                 | mov                 ebx, eax
            //   8bca                 | mov                 ecx, edx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   eb29                 | jmp                 0x2b

        $sequence_3 = { e9???????? 8d45e8 50 8bfe e8???????? 59 894310 }
            // n = 7, score = 600
            //   e9????????           |                     
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   50                   | push                eax
            //   8bfe                 | mov                 edi, esi
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   894310               | mov                 dword ptr [ebx + 0x10], eax

        $sequence_4 = { 8d45c0 8945ec 33ff eb02 33f6 8b45e8 57 }
            // n = 7, score = 600
            //   8d45c0               | lea                 eax, [ebp - 0x40]
            //   8945ec               | mov                 dword ptr [ebp - 0x14], eax
            //   33ff                 | xor                 edi, edi
            //   eb02                 | jmp                 4
            //   33f6                 | xor                 esi, esi
            //   8b45e8               | mov                 eax, dword ptr [ebp - 0x18]
            //   57                   | push                edi

        $sequence_5 = { ff74240c 8bcb e8???????? 59 eb33 8d4801 e8???????? }
            // n = 7, score = 600
            //   ff74240c             | push                dword ptr [esp + 0xc]
            //   8bcb                 | mov                 ecx, ebx
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   eb33                 | jmp                 0x35
            //   8d4801               | lea                 ecx, [eax + 1]
            //   e8????????           |                     

        $sequence_6 = { e8???????? 53 55 8bac2494000000 56 33db 57 }
            // n = 7, score = 600
            //   e8????????           |                     
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   8bac2494000000       | mov                 ebp, dword ptr [esp + 0x94]
            //   56                   | push                esi
            //   33db                 | xor                 ebx, ebx
            //   57                   | push                edi

        $sequence_7 = { eb26 8b4d14 8b7d0c 8bf0 33d2 f3a6 742e }
            // n = 7, score = 600
            //   eb26                 | jmp                 0x28
            //   8b4d14               | mov                 ecx, dword ptr [ebp + 0x14]
            //   8b7d0c               | mov                 edi, dword ptr [ebp + 0xc]
            //   8bf0                 | mov                 esi, eax
            //   33d2                 | xor                 edx, edx
            //   f3a6                 | repe cmpsb          byte ptr [esi], byte ptr es:[edi]
            //   742e                 | je                  0x30

        $sequence_8 = { f7870001000000000200 7562 8b87e4000000 8bb098000000 3bf1 7452 56 }
            // n = 7, score = 600
            //   f7870001000000000200     | test    dword ptr [edi + 0x100], 0x20000
            //   7562                 | jne                 0x64
            //   8b87e4000000         | mov                 eax, dword ptr [edi + 0xe4]
            //   8bb098000000         | mov                 esi, dword ptr [eax + 0x98]
            //   3bf1                 | cmp                 esi, ecx
            //   7452                 | je                  0x54
            //   56                   | push                esi

        $sequence_9 = { c645ff00 c645fe00 8975d4 7408 8955ec 894de4 eb06 }
            // n = 7, score = 600
            //   c645ff00             | mov                 byte ptr [ebp - 1], 0
            //   c645fe00             | mov                 byte ptr [ebp - 2], 0
            //   8975d4               | mov                 dword ptr [ebp - 0x2c], esi
            //   7408                 | je                  0xa
            //   8955ec               | mov                 dword ptr [ebp - 0x14], edx
            //   894de4               | mov                 dword ptr [ebp - 0x1c], ecx
            //   eb06                 | jmp                 8

    condition:
        7 of them and filesize < 3915776
}