rule win_sanny_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.sanny."
        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.sanny"
        malpedia_rule_date = "20220405"
        malpedia_hash = "ecd38294bd47d5589be5cd5490dc8bb4804afc2a"
        malpedia_version = "20220411"
        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 = { 0f8635020000 8bb42470030000 81c390000000 8d942468020000 }
            // n = 4, score = 100
            //   0f8635020000         | jbe                 0x23b
            //   8bb42470030000       | mov                 esi, dword ptr [esp + 0x370]
            //   81c390000000         | add                 ebx, 0x90
            //   8d942468020000       | lea                 edx, dword ptr [esp + 0x268]

        $sequence_1 = { 8bc6 8bce c1f805 83e11f 8b0485c0864100 }
            // n = 5, score = 100
            //   8bc6                 | mov                 eax, esi
            //   8bce                 | mov                 ecx, esi
            //   c1f805               | sar                 eax, 5
            //   83e11f               | and                 ecx, 0x1f
            //   8b0485c0864100       | mov                 eax, dword ptr [eax*4 + 0x4186c0]

        $sequence_2 = { 52 50 6801000080 e8???????? 85c0 740b 8b8624c70000 }
            // n = 7, score = 100
            //   52                   | push                edx
            //   50                   | push                eax
            //   6801000080           | push                0x80000001
            //   e8????????           |                     
            //   85c0                 | test                eax, eax
            //   740b                 | je                  0xd
            //   8b8624c70000         | mov                 eax, dword ptr [esi + 0xc724]

        $sequence_3 = { 8bc3 8bcb c1f805 83e11f 8b0485c0864100 8d04c8 eb05 }
            // n = 7, score = 100
            //   8bc3                 | mov                 eax, ebx
            //   8bcb                 | mov                 ecx, ebx
            //   c1f805               | sar                 eax, 5
            //   83e11f               | and                 ecx, 0x1f
            //   8b0485c0864100       | mov                 eax, dword ptr [eax*4 + 0x4186c0]
            //   8d04c8               | lea                 eax, dword ptr [eax + ecx*8]
            //   eb05                 | jmp                 7

        $sequence_4 = { 33c8 8bc6 c1f81a 83e03f 8b3c85d4594100 8bc6 c1f812 }
            // n = 7, score = 100
            //   33c8                 | xor                 ecx, eax
            //   8bc6                 | mov                 eax, esi
            //   c1f81a               | sar                 eax, 0x1a
            //   83e03f               | and                 eax, 0x3f
            //   8b3c85d4594100       | mov                 edi, dword ptr [eax*4 + 0x4159d4]
            //   8bc6                 | mov                 eax, esi
            //   c1f812               | sar                 eax, 0x12

        $sequence_5 = { 03d0 c784d56021000000000000 ff8558200000 b941000000 33c0 8dbc2454020000 f3ab }
            // n = 7, score = 100
            //   03d0                 | add                 edx, eax
            //   c784d56021000000000000     | mov    dword ptr [ebp + edx*8 + 0x2160], 0
            //   ff8558200000         | inc                 dword ptr [ebp + 0x2058]
            //   b941000000           | mov                 ecx, 0x41
            //   33c0                 | xor                 eax, eax
            //   8dbc2454020000       | lea                 edi, dword ptr [esp + 0x254]
            //   f3ab                 | rep stosd           dword ptr es:[edi], eax

        $sequence_6 = { 8b6c2450 c1c107 03cd 8beb 03ce 33ee }
            // n = 6, score = 100
            //   8b6c2450             | mov                 ebp, dword ptr [esp + 0x50]
            //   c1c107               | rol                 ecx, 7
            //   03cd                 | add                 ecx, ebp
            //   8beb                 | mov                 ebp, ebx
            //   03ce                 | add                 ecx, esi
            //   33ee                 | xor                 ebp, esi

        $sequence_7 = { 3bfb 741c 57 e8???????? 56 8d0c00 6a01 }
            // n = 7, score = 100
            //   3bfb                 | cmp                 edi, ebx
            //   741c                 | je                  0x1e
            //   57                   | push                edi
            //   e8????????           |                     
            //   56                   | push                esi
            //   8d0c00               | lea                 ecx, dword ptr [eax + eax]
            //   6a01                 | push                1

        $sequence_8 = { 2bc1 03c2 894508 8bc6 c1f805 83e61f 8d1c85c0864100 }
            // n = 7, score = 100
            //   2bc1                 | sub                 eax, ecx
            //   03c2                 | add                 eax, edx
            //   894508               | mov                 dword ptr [ebp + 8], eax
            //   8bc6                 | mov                 eax, esi
            //   c1f805               | sar                 eax, 5
            //   83e61f               | and                 esi, 0x1f
            //   8d1c85c0864100       | lea                 ebx, dword ptr [eax*4 + 0x4186c0]

        $sequence_9 = { 8b542408 53 55 56 8b02 57 8bc8 }
            // n = 7, score = 100
            //   8b542408             | mov                 edx, dword ptr [esp + 8]
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi
            //   8b02                 | mov                 eax, dword ptr [edx]
            //   57                   | push                edi
            //   8bc8                 | mov                 ecx, eax

    condition:
        7 of them and filesize < 253952
}