rule win_ragnarlocker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-10-14"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.5.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.ragnarlocker"
        malpedia_rule_date = "20201014"
        malpedia_hash = "a7e3bd57eaf12bf3ea29a863c041091ba3af9ac9"
        malpedia_version = "20201014"
        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 = { c745f40a000000 0f118570ffffff 8bb574ffffff 0f104110 8975d0 0f114580 }
            // n = 6, score = 200
            //   c745f40a000000       | mov                 dword ptr [ebp - 0xc], 0xa
            //   0f118570ffffff       | movups              xmmword ptr [ebp - 0x90], xmm0
            //   8bb574ffffff         | mov                 esi, dword ptr [ebp - 0x8c]
            //   0f104110             | movups              xmm0, xmmword ptr [ecx + 0x10]
            //   8975d0               | mov                 dword ptr [ebp - 0x30], esi
            //   0f114580             | movups              xmmword ptr [ebp - 0x80], xmm0

        $sequence_1 = { c783d000000000000000 53 897510 897d08 e8???????? }
            // n = 5, score = 200
            //   c783d000000000000000     | mov    dword ptr [ebx + 0xd0], 0
            //   53                   | push                ebx
            //   897510               | mov                 dword ptr [ebp + 0x10], esi
            //   897d08               | mov                 dword ptr [ebp + 8], edi
            //   e8????????           |                     

        $sequence_2 = { 8b55f0 c1e11e 0bf9 8b4de4 317de0 8bfa 0fa4ca19 }
            // n = 7, score = 200
            //   8b55f0               | mov                 edx, dword ptr [ebp - 0x10]
            //   c1e11e               | shl                 ecx, 0x1e
            //   0bf9                 | or                  edi, ecx
            //   8b4de4               | mov                 ecx, dword ptr [ebp - 0x1c]
            //   317de0               | xor                 dword ptr [ebp - 0x20], edi
            //   8bfa                 | mov                 edi, edx
            //   0fa4ca19             | shld                edx, ecx, 0x19

        $sequence_3 = { 884b74 b120 8b4648 8b564c e8???????? 884373 b128 }
            // n = 7, score = 200
            //   884b74               | mov                 byte ptr [ebx + 0x74], cl
            //   b120                 | mov                 cl, 0x20
            //   8b4648               | mov                 eax, dword ptr [esi + 0x48]
            //   8b564c               | mov                 edx, dword ptr [esi + 0x4c]
            //   e8????????           |                     
            //   884373               | mov                 byte ptr [ebx + 0x73], al
            //   b128                 | mov                 cl, 0x28

        $sequence_4 = { c1e912 0bd0 8b45f4 0bf1 33da 33fe 8bf0 }
            // n = 7, score = 200
            //   c1e912               | shr                 ecx, 0x12
            //   0bd0                 | or                  edx, eax
            //   8b45f4               | mov                 eax, dword ptr [ebp - 0xc]
            //   0bf1                 | or                  esi, ecx
            //   33da                 | xor                 ebx, edx
            //   33fe                 | xor                 edi, esi
            //   8bf0                 | mov                 esi, eax

        $sequence_5 = { 11558c 33db 8b55c8 8bf2 0fa4ca17 c1ee09 }
            // n = 6, score = 200
            //   11558c               | adc                 dword ptr [ebp - 0x74], edx
            //   33db                 | xor                 ebx, ebx
            //   8b55c8               | mov                 edx, dword ptr [ebp - 0x38]
            //   8bf2                 | mov                 esi, edx
            //   0fa4ca17             | shld                edx, ecx, 0x17
            //   c1ee09               | shr                 esi, 9

        $sequence_6 = { 50 e8???????? 83c40c ba3a000000 }
            // n = 4, score = 200
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   ba3a000000           | mov                 edx, 0x3a

        $sequence_7 = { 0f84e7010000 8d4d10 51 8d8d4cf5ffff 51 6804010000 50 }
            // n = 7, score = 200
            //   0f84e7010000         | je                  0x1ed
            //   8d4d10               | lea                 ecx, [ebp + 0x10]
            //   51                   | push                ecx
            //   8d8d4cf5ffff         | lea                 ecx, [ebp - 0xab4]
            //   51                   | push                ecx
            //   6804010000           | push                0x104
            //   50                   | push                eax

        $sequence_8 = { 0bd8 0fb6410f 0fa4de08 8b4d98 99 0bf2 c1e308 }
            // n = 7, score = 200
            //   0bd8                 | or                  ebx, eax
            //   0fb6410f             | movzx               eax, byte ptr [ecx + 0xf]
            //   0fa4de08             | shld                esi, ebx, 8
            //   8b4d98               | mov                 ecx, dword ptr [ebp - 0x68]
            //   99                   | cdq                 
            //   0bf2                 | or                  esi, edx
            //   c1e308               | shl                 ebx, 8

        $sequence_9 = { 8bf2 0fa4ca17 c1ee09 c1e117 0bda 8b550c 0bf1 }
            // n = 7, score = 200
            //   8bf2                 | mov                 esi, edx
            //   0fa4ca17             | shld                edx, ecx, 0x17
            //   c1ee09               | shr                 esi, 9
            //   c1e117               | shl                 ecx, 0x17
            //   0bda                 | or                  ebx, edx
            //   8b550c               | mov                 edx, dword ptr [ebp + 0xc]
            //   0bf1                 | or                  esi, ecx

    condition:
        7 of them and filesize < 147456
}