rule win_hardrain_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-05-30"
        version = "1"
        description = "autogenerated rule brought to you by yara-signator"
        tool = "yara-signator v0.4.0"
        tool_config = "callsandjumps;datarefs;binvalue"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.hardrain"
        malpedia_rule_date = "20200529"
        malpedia_hash = "92c362319514e5a6da26204961446caa3a8b32a8"
        malpedia_version = "20200529"
        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 / approach 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 = { 7518 8b4c2400 8b442410 51 50 e8???????? 83c408 }
            // n = 7, score = 200
            //   7518                 | jne                 0x1a
            //   8b4c2400             | mov                 ecx, dword ptr [esp]
            //   8b442410             | mov                 eax, dword ptr [esp + 0x10]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   e8????????           |                     
            //   83c408               | add                 esp, 8

        $sequence_1 = { 8bce e8???????? 8bf8 85ff 7434 8d542414 }
            // n = 6, score = 200
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   8bf8                 | mov                 edi, eax
            //   85ff                 | test                edi, edi
            //   7434                 | je                  0x36
            //   8d542414             | lea                 edx, [esp + 0x14]

        $sequence_2 = { 33c2 d1e8 33c2 81e2ffff3f00 c1e811 03d2 }
            // n = 6, score = 200
            //   33c2                 | xor                 eax, edx
            //   d1e8                 | shr                 eax, 1
            //   33c2                 | xor                 eax, edx
            //   81e2ffff3f00         | and                 edx, 0x3fffff
            //   c1e811               | shr                 eax, 0x11
            //   03d2                 | add                 edx, edx

        $sequence_3 = { 51 ff15???????? 6685c0 0f86a3000000 8b5500 }
            // n = 5, score = 200
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   6685c0               | test                ax, ax
            //   0f86a3000000         | jbe                 0xa9
            //   8b5500               | mov                 edx, dword ptr [ebp]

        $sequence_4 = { 8bce e8???????? 85c0 746c 55 }
            // n = 5, score = 200
            //   8bce                 | mov                 ecx, esi
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   746c                 | je                  0x6e
            //   55                   | push                ebp

        $sequence_5 = { 7463 8b742414 85f6 745b 8b6c2418 55 6a40 }
            // n = 7, score = 200
            //   7463                 | je                  0x65
            //   8b742414             | mov                 esi, dword ptr [esp + 0x14]
            //   85f6                 | test                esi, esi
            //   745b                 | je                  0x5d
            //   8b6c2418             | mov                 ebp, dword ptr [esp + 0x18]
            //   55                   | push                ebp
            //   6a40                 | push                0x40

        $sequence_6 = { 7406 83f201 89510c c3 8b5110 }
            // n = 5, score = 200
            //   7406                 | je                  8
            //   83f201               | xor                 edx, 1
            //   89510c               | mov                 dword ptr [ecx + 0xc], edx
            //   c3                   | ret                 
            //   8b5110               | mov                 edx, dword ptr [ecx + 0x10]

        $sequence_7 = { 33c0 8d7c2418 c744241400000000 f3ab b9bc010000 8dbc244c020000 }
            // n = 6, score = 200
            //   33c0                 | xor                 eax, eax
            //   8d7c2418             | lea                 edi, [esp + 0x18]
            //   c744241400000000     | mov                 dword ptr [esp + 0x14], 0
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax
            //   b9bc010000           | mov                 ecx, 0x1bc
            //   8dbc244c020000       | lea                 edi, [esp + 0x24c]

        $sequence_8 = { 56 8b7104 8bc2 c1e80b 83e001 33f0 }
            // n = 6, score = 200
            //   56                   | push                esi
            //   8b7104               | mov                 esi, dword ptr [ecx + 4]
            //   8bc2                 | mov                 eax, edx
            //   c1e80b               | shr                 eax, 0xb
            //   83e001               | and                 eax, 1
            //   33f0                 | xor                 esi, eax

        $sequence_9 = { 50 56 6857340000 51 e8???????? }
            // n = 5, score = 200
            //   50                   | push                eax
            //   56                   | push                esi
            //   6857340000           | push                0x3457
            //   51                   | push                ecx
            //   e8????????           |                     

    condition:
        7 of them and filesize < 368640
}