rule win_spyder_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-04-08"
        version = "1"
        description = "Detects win.spyder."
        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.spyder"
        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 = { e8???????? 85c0 751a 488d1588890000 41b810200100 488bcd }
            // n = 6, score = 500
            //   e8????????           |                     
            //   85c0                 | sub                 esp, 0x20
            //   751a                 | dec                 eax
            //   488d1588890000       | lea                 ebx, dword ptr [0x938f]
            //   41b810200100         | dec                 eax
            //   488bcd               | lea                 edi, dword ptr [0x9388]

        $sequence_1 = { 0f84bb000000 488b5638 498d4c0500 ff5620 4c8be0 4885c0 0f84f3000000 }
            // n = 7, score = 500
            //   0f84bb000000         | jmp                 0x1e
            //   488b5638             | dec                 eax
            //   498d4c0500           | lea                 ecx, dword ptr [0x5f93]
            //   ff5620               | dec                 eax
            //   4c8be0               | mov                 esi, eax
            //   4885c0               | dec                 eax
            //   0f84f3000000         | test                eax, eax

        $sequence_2 = { e8???????? cc 4c8d05fc890000 498bd4 }
            // n = 4, score = 500
            //   e8????????           |                     
            //   cc                   | dec                 ecx
            //   4c8d05fc890000       | mov                 edx, eax
            //   498bd4               | dec                 eax

        $sequence_3 = { 488d0d935f0000 ff15???????? 488bf0 4885c0 0f8493010000 488d156a5f0000 }
            // n = 6, score = 500
            //   488d0d935f0000       | mov                 ecx, ecx
            //   ff15????????         |                     
            //   488bf0               | test                eax, eax
            //   4885c0               | je                  0x29
            //   0f8493010000         | dec                 ebp
            //   488d156a5f0000       | sub                 eax, ecx

        $sequence_4 = { 4883ec20 488d1d8f930000 488d3d88930000 eb0e }
            // n = 4, score = 500
            //   4883ec20             | sub                 eax, ecx
            //   488d1d8f930000       | dec                 esp
            //   488d3d88930000       | lea                 ecx, dword ptr [0xffffac82]
            //   eb0e                 | dec                 ecx

        $sequence_5 = { 488b4e30 41b904000000 41b800300000 ff15???????? 488be8 }
            // n = 5, score = 500
            //   488b4e30             | dec                 eax
            //   41b904000000         | mov                 ecx, dword ptr [esi + 0x30]
            //   41b800300000         | inc                 ecx
            //   ff15????????         |                     
            //   488be8               | mov                 ecx, 4

        $sequence_6 = { cc 488d4b04 4c8d05d83d0000 ba16000000 }
            // n = 4, score = 500
            //   cc                   | je                  0x19c
            //   488d4b04             | dec                 eax
            //   4c8d05d83d0000       | lea                 edx, dword ptr [0x5f6a]
            //   ba16000000           | int3                

        $sequence_7 = { 4c8d0d82acffff 498bc9 e8???????? 85c0 7422 4d2bc1 }
            // n = 6, score = 500
            //   4c8d0d82acffff       | inc                 ecx
            //   498bc9               | mov                 eax, 0x3000
            //   e8????????           |                     
            //   85c0                 | dec                 eax
            //   7422                 | mov                 ebp, eax
            //   4d2bc1               | dec                 esp

        $sequence_8 = { 83c408 53 e8???????? 83c404 85c0 742a }
            // n = 6, score = 100
            //   83c408               | add                 esp, 8
            //   53                   | push                ebx
            //   e8????????           |                     
            //   83c404               | add                 esp, 4
            //   85c0                 | test                eax, eax
            //   742a                 | je                  0x2c

        $sequence_9 = { 51 53 55 56 8b742414 57 66813e4d5a }
            // n = 7, score = 100
            //   51                   | push                ecx
            //   53                   | push                ebx
            //   55                   | push                ebp
            //   56                   | push                esi
            //   8b742414             | mov                 esi, dword ptr [esp + 0x14]
            //   57                   | push                edi
            //   66813e4d5a           | cmp                 word ptr [esi], 0x5a4d

        $sequence_10 = { 7520 8b5750 6a04 6800300000 }
            // n = 4, score = 100
            //   7520                 | jne                 0x22
            //   8b5750               | mov                 edx, dword ptr [edi + 0x50]
            //   6a04                 | push                4
            //   6800300000           | push                0x3000

        $sequence_11 = { 8bf0 83feff 743f 3bf3 743b 6a02 }
            // n = 6, score = 100
            //   8bf0                 | mov                 esi, eax
            //   83feff               | cmp                 esi, -1
            //   743f                 | je                  0x41
            //   3bf3                 | cmp                 esi, ebx
            //   743b                 | je                  0x3d
            //   6a02                 | push                2

        $sequence_12 = { f2ae a1???????? f7d1 49 3bc3 8bf9 741c }
            // n = 7, score = 100
            //   f2ae                 | repne scasb         al, byte ptr es:[edi]
            //   a1????????           |                     
            //   f7d1                 | not                 ecx
            //   49                   | dec                 ecx
            //   3bc3                 | cmp                 eax, ebx
            //   8bf9                 | mov                 edi, ecx
            //   741c                 | je                  0x1e

        $sequence_13 = { b8???????? c705????????3b330010 a3???????? c705????????a1330010 c705????????e1320010 c705????????89330010 }
            // n = 6, score = 100
            //   b8????????           |                     
            //   c705????????3b330010     |     
            //   a3????????           |                     
            //   c705????????a1330010     |     
            //   c705????????e1320010     |     
            //   c705????????89330010     |     

        $sequence_14 = { ba???????? 8bf1 8bc1 c1fe05 83e01f 8b34b5204b0910 }
            // n = 6, score = 100
            //   ba????????           |                     
            //   8bf1                 | mov                 esi, ecx
            //   8bc1                 | mov                 eax, ecx
            //   c1fe05               | sar                 esi, 5
            //   83e01f               | and                 eax, 0x1f
            //   8b34b5204b0910       | mov                 esi, dword ptr [esi*4 + 0x10094b20]

        $sequence_15 = { 8b7d0c 8d0540460910 83780800 754e b741 b35a b620 }
            // n = 7, score = 100
            //   8b7d0c               | mov                 edi, dword ptr [ebp + 0xc]
            //   8d0540460910         | lea                 eax, dword ptr [0x10094640]
            //   83780800             | cmp                 dword ptr [eax + 8], 0
            //   754e                 | jne                 0x50
            //   b741                 | mov                 bh, 0x41
            //   b35a                 | mov                 bl, 0x5a
            //   b620                 | mov                 dh, 0x20

    condition:
        7 of them and filesize < 1458176
}