rule win_troldesh_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        version = "1"
        description = "Detects win.troldesh."
        info = "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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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???????? 55 8bf0 e8???????? 83c428 85f6 742e }
            // n = 7, score = 600
            //   e8????????           |                     
            //   55                   | push                ebp
            //   8bf0                 | mov                 esi, eax
            //   e8????????           |                     
            //   83c428               | add                 esp, 0x28
            //   85f6                 | test                esi, esi
            //   742e                 | je                  0x30

        $sequence_1 = { ff7508 e8???????? 59 33f6 3975f4 7409 ff75f4 }
            // n = 7, score = 600
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   33f6                 | xor                 esi, esi
            //   3975f4               | cmp                 dword ptr [ebp - 0xc], esi
            //   7409                 | je                  0xb
            //   ff75f4               | push                dword ptr [ebp - 0xc]

        $sequence_2 = { f6400808 893d???????? 893d???????? 7509 f6839000000020 740a 57 }
            // n = 7, score = 600
            //   f6400808             | test                byte ptr [eax + 8], 8
            //   893d????????         |                     
            //   893d????????         |                     
            //   7509                 | jne                 0xb
            //   f6839000000020       | test                byte ptr [ebx + 0x90], 0x20
            //   740a                 | je                  0xc
            //   57                   | push                edi

        $sequence_3 = { e8???????? 8b4df8 c70424???????? e8???????? 33c0 eb82 55 }
            // n = 7, score = 600
            //   e8????????           |                     
            //   8b4df8               | mov                 ecx, dword ptr [ebp - 8]
            //   c70424????????       |                     
            //   e8????????           |                     
            //   33c0                 | xor                 eax, eax
            //   eb82                 | jmp                 0xffffff84
            //   55                   | push                ebp

        $sequence_4 = { ff7508 8365f800 8945f0 8d45bc 8d75ec c745ec18000000 8945f4 }
            // n = 7, score = 600
            //   ff7508               | push                dword ptr [ebp + 8]
            //   8365f800             | and                 dword ptr [ebp - 8], 0
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   8d45bc               | lea                 eax, [ebp - 0x44]
            //   8d75ec               | lea                 esi, [ebp - 0x14]
            //   c745ec18000000       | mov                 dword ptr [ebp - 0x14], 0x18
            //   8945f4               | mov                 dword ptr [ebp - 0xc], eax

        $sequence_5 = { eb18 53 6a01 ffb608020000 68???????? 6a00 e8???????? }
            // n = 7, score = 600
            //   eb18                 | jmp                 0x1a
            //   53                   | push                ebx
            //   6a01                 | push                1
            //   ffb608020000         | push                dword ptr [esi + 0x208]
            //   68????????           |                     
            //   6a00                 | push                0
            //   e8????????           |                     

        $sequence_6 = { ff7518 8b550c ff75fc 8b4d08 ff7514 e8???????? eb4f }
            // n = 7, score = 600
            //   ff7518               | push                dword ptr [ebp + 0x18]
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]
            //   ff7514               | push                dword ptr [ebp + 0x14]
            //   e8????????           |                     
            //   eb4f                 | jmp                 0x51

        $sequence_7 = { e8???????? 8bf8 838f8000000002 59 897c2410 e8???????? 8b7020 }
            // n = 7, score = 600
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   838f8000000002       | or                  dword ptr [edi + 0x80], 2
            //   59                   | pop                 ecx
            //   897c2410             | mov                 dword ptr [esp + 0x10], edi
            //   e8????????           |                     
            //   8b7020               | mov                 esi, dword ptr [eax + 0x20]

        $sequence_8 = { e8???????? 83c8ff e9???????? 8bf3 e8???????? 898394000000 8b45fc }
            // n = 7, score = 600
            //   e8????????           |                     
            //   83c8ff               | or                  eax, 0xffffffff
            //   e9????????           |                     
            //   8bf3                 | mov                 esi, ebx
            //   e8????????           |                     
            //   898394000000         | mov                 dword ptr [ebx + 0x94], eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]

        $sequence_9 = { 8d442414 50 57 8d4c2424 e8???????? 59 59 }
            // n = 7, score = 600
            //   8d442414             | lea                 eax, [esp + 0x14]
            //   50                   | push                eax
            //   57                   | push                edi
            //   8d4c2424             | lea                 ecx, [esp + 0x24]
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx

    condition:
        7 of them and filesize < 3915776
}