rule win_shadowpad_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2021-06-10"
        version = "1"
        description = "Detects win.shadowpad."
        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.shadowpad"
        malpedia_rule_date = "20210604"
        malpedia_hash = "be09d5d71e77373c0f538068be31a2ad4c69cfbd"
        malpedia_version = "20210616"
        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 = { 4a 7552 8b55fc 69d28f201c01 bb8155bfb1 2bda 895dfc }
            // n = 7, score = 200
            //   4a                   | dec                 edx
            //   7552                 | jne                 0x54
            //   8b55fc               | mov                 edx, dword ptr [ebp - 4]
            //   69d28f201c01         | imul                edx, edx, 0x11c208f
            //   bb8155bfb1           | mov                 ebx, 0xb1bf5581
            //   2bda                 | sub                 ebx, edx
            //   895dfc               | mov                 dword ptr [ebp - 4], ebx

        $sequence_1 = { 8d4590 50 8d45c0 e8???????? 8d4de8 51 e8???????? }
            // n = 7, score = 200
            //   8d4590               | lea                 eax, dword ptr [ebp - 0x70]
            //   50                   | push                eax
            //   8d45c0               | lea                 eax, dword ptr [ebp - 0x40]
            //   e8????????           |                     
            //   8d4de8               | lea                 ecx, dword ptr [ebp - 0x18]
            //   51                   | push                ecx
            //   e8????????           |                     

        $sequence_2 = { 3bd7 7cdb 33c0 5f }
            // n = 4, score = 200
            //   3bd7                 | cmp                 edx, edi
            //   7cdb                 | jl                  0xffffffdd
            //   33c0                 | xor                 eax, eax
            //   5f                   | pop                 edi

        $sequence_3 = { 8bec a1???????? 85c0 7510 6852fed995 e8???????? }
            // n = 6, score = 200
            //   8bec                 | mov                 ebp, esp
            //   a1????????           |                     
            //   85c0                 | test                eax, eax
            //   7510                 | jne                 0x12
            //   6852fed995           | push                0x95d9fe52
            //   e8????????           |                     

        $sequence_4 = { 8bf0 e8???????? 53 8d4c247c 51 }
            // n = 5, score = 200
            //   8bf0                 | mov                 esi, eax
            //   e8????????           |                     
            //   53                   | push                ebx
            //   8d4c247c             | lea                 ecx, dword ptr [esp + 0x7c]
            //   51                   | push                ecx

        $sequence_5 = { 885d0c e8???????? ff75d4 8b7dc8 8d45e8 e8???????? 8b4d08 }
            // n = 7, score = 200
            //   885d0c               | mov                 byte ptr [ebp + 0xc], bl
            //   e8????????           |                     
            //   ff75d4               | push                dword ptr [ebp - 0x2c]
            //   8b7dc8               | mov                 edi, dword ptr [ebp - 0x38]
            //   8d45e8               | lea                 eax, dword ptr [ebp - 0x18]
            //   e8????????           |                     
            //   8b4d08               | mov                 ecx, dword ptr [ebp + 8]

        $sequence_6 = { 897c2410 897c2414 8d442440 50 8d44241c 50 }
            // n = 6, score = 200
            //   897c2410             | mov                 dword ptr [esp + 0x10], edi
            //   897c2414             | mov                 dword ptr [esp + 0x14], edi
            //   8d442440             | lea                 eax, dword ptr [esp + 0x40]
            //   50                   | push                eax
            //   8d44241c             | lea                 eax, dword ptr [esp + 0x1c]
            //   50                   | push                eax

        $sequence_7 = { 88543dbc 47 3bfe 72e5 8d45bc 50 }
            // n = 6, score = 200
            //   88543dbc             | mov                 byte ptr [ebp + edi - 0x44], dl
            //   47                   | inc                 edi
            //   3bfe                 | cmp                 edi, esi
            //   72e5                 | jb                  0xffffffe7
            //   8d45bc               | lea                 eax, dword ptr [ebp - 0x44]
            //   50                   | push                eax

        $sequence_8 = { 53 56 57 6a40 be00100000 56 6810d40000 }
            // n = 7, score = 200
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   6a40                 | push                0x40
            //   be00100000           | mov                 esi, 0x1000
            //   56                   | push                esi
            //   6810d40000           | push                0xd410

        $sequence_9 = { 7c07 3d0040230e 730a 6810270000 e9???????? 6a10 8d44241c }
            // n = 7, score = 200
            //   7c07                 | jl                  9
            //   3d0040230e           | cmp                 eax, 0xe234000
            //   730a                 | jae                 0xc
            //   6810270000           | push                0x2710
            //   e9????????           |                     
            //   6a10                 | push                0x10
            //   8d44241c             | lea                 eax, dword ptr [esp + 0x1c]

    condition:
        7 of them and filesize < 188416
}