rule win_suncrypt_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.suncrypt"
        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 = { 40 83f801 72f4 b001 5e 5d c3 }
            // n = 7, score = 200
            //   40                   | inc                 eax
            //   83f801               | cmp                 eax, 1
            //   72f4                 | jb                  0xfffffff6
            //   b001                 | mov                 al, 1
            //   5e                   | pop                 esi
            //   5d                   | pop                 ebp
            //   c3                   | ret                 

        $sequence_1 = { 8345e810 0f28d4 8945f8 0f110f 8b7dfc 0f288d10feffff 660ffe8d00ffffff }
            // n = 7, score = 200
            //   8345e810             | add                 dword ptr [ebp - 0x18], 0x10
            //   0f28d4               | movaps              xmm2, xmm4
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   0f110f               | movups              xmmword ptr [edi], xmm1
            //   8b7dfc               | mov                 edi, dword ptr [ebp - 4]
            //   0f288d10feffff       | movaps              xmm1, xmmword ptr [ebp - 0x1f0]
            //   660ffe8d00ffffff     | paddd               xmm1, xmmword ptr [ebp - 0x100]

        $sequence_2 = { 85c9 741f 50 57 51 e8???????? 83c40c }
            // n = 7, score = 200
            //   85c9                 | test                ecx, ecx
            //   741f                 | je                  0x21
            //   50                   | push                eax
            //   57                   | push                edi
            //   51                   | push                ecx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc

        $sequence_3 = { 8b4580 0345cc 898d58ffffff 8b4dd0 33c8 8b55f8 c1c110 }
            // n = 7, score = 200
            //   8b4580               | mov                 eax, dword ptr [ebp - 0x80]
            //   0345cc               | add                 eax, dword ptr [ebp - 0x34]
            //   898d58ffffff         | mov                 dword ptr [ebp - 0xa8], ecx
            //   8b4dd0               | mov                 ecx, dword ptr [ebp - 0x30]
            //   33c8                 | xor                 ecx, eax
            //   8b55f8               | mov                 edx, dword ptr [ebp - 8]
            //   c1c110               | rol                 ecx, 0x10

        $sequence_4 = { ff750c ff7508 e8???????? 83c40c 5d c3 a804 }
            // n = 7, score = 200
            //   ff750c               | push                dword ptr [ebp + 0xc]
            //   ff7508               | push                dword ptr [ebp + 8]
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   5d                   | pop                 ebp
            //   c3                   | ret                 
            //   a804                 | test                al, 4

        $sequence_5 = { 56 ffd7 6808020000 6a00 68???????? a3???????? e8???????? }
            // n = 7, score = 200
            //   56                   | push                esi
            //   ffd7                 | call                edi
            //   6808020000           | push                0x208
            //   6a00                 | push                0
            //   68????????           |                     
            //   a3????????           |                     
            //   e8????????           |                     

        $sequence_6 = { 8945b0 8b45fc 038534ffffff 33f8 c1c710 03cf 8bd1 }
            // n = 7, score = 200
            //   8945b0               | mov                 dword ptr [ebp - 0x50], eax
            //   8b45fc               | mov                 eax, dword ptr [ebp - 4]
            //   038534ffffff         | add                 eax, dword ptr [ebp - 0xcc]
            //   33f8                 | xor                 edi, eax
            //   c1c710               | rol                 edi, 0x10
            //   03cf                 | add                 ecx, edi
            //   8bd1                 | mov                 edx, ecx

        $sequence_7 = { 8845e1 8b45dc 0402 83f06c 8845e2 8b45dc 0403 }
            // n = 7, score = 200
            //   8845e1               | mov                 byte ptr [ebp - 0x1f], al
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   0402                 | add                 al, 2
            //   83f06c               | xor                 eax, 0x6c
            //   8845e2               | mov                 byte ptr [ebp - 0x1e], al
            //   8b45dc               | mov                 eax, dword ptr [ebp - 0x24]
            //   0403                 | add                 al, 3

        $sequence_8 = { 83c601 742c 8b0f 85c9 7426 8b470c 8d1430 }
            // n = 7, score = 200
            //   83c601               | add                 esi, 1
            //   742c                 | je                  0x2e
            //   8b0f                 | mov                 ecx, dword ptr [edi]
            //   85c9                 | test                ecx, ecx
            //   7426                 | je                  0x28
            //   8b470c               | mov                 eax, dword ptr [edi + 0xc]
            //   8d1430               | lea                 edx, [eax + esi]

        $sequence_9 = { 8b1d???????? 56 57 c745fc00000000 c745f800000000 c745f400000000 }
            // n = 6, score = 200
            //   8b1d????????         |                     
            //   56                   | push                esi
            //   57                   | push                edi
            //   c745fc00000000       | mov                 dword ptr [ebp - 4], 0
            //   c745f800000000       | mov                 dword ptr [ebp - 8], 0
            //   c745f400000000       | mov                 dword ptr [ebp - 0xc], 0

    condition:
        7 of them and filesize < 172032
}