rule win_spyder_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-08-05"
        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 = "20220805"
        malpedia_hash = "6ec06c64bcfdbeda64eff021c766b4ce34542b71"
        malpedia_version = "20220808"
        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 = { 7437 482bfb 0f1f8000000000 4c8b4638 498bcc 0fb7d0 }
            // n = 6, score = 500
            //   7437                 | sub                 esp, 0x20
            //   482bfb               | dec                 eax
            //   0f1f8000000000       | lea                 ebx, [0x9367]
            //   4c8b4638             | dec                 eax
            //   498bcc               | lea                 edi, [0x9360]
            //   0fb7d0               | jmp                 0x22

        $sequence_1 = { 7505 4a8d542802 ff5628 4889041f }
            // n = 4, score = 500
            //   7505                 | dec                 eax
            //   4a8d542802           | mov                 ecx, esi
            //   ff5628               | push                edi
            //   4889041f             | dec                 eax

        $sequence_2 = { ff15???????? 4885c0 7419 488d1583a40000 }
            // n = 4, score = 500
            //   ff15????????         |                     
            //   4885c0               | lea                 eax, [0x3ea3]
            //   7419                 | mov                 edx, 0x16
            //   488d1583a40000       | dec                 eax

        $sequence_3 = { 33c9 ff15???????? 488d0d63880000 ff15???????? 833d????????00 }
            // n = 5, score = 500
            //   33c9                 | dec                 eax
            //   ff15????????         |                     
            //   488d0d63880000       | lea                 edx, [0x5f00]
            //   ff15????????         |                     
            //   833d????????00       |                     

        $sequence_4 = { ff15???????? 488d15005f0000 488bce 488905???????? ff15???????? }
            // n = 5, score = 500
            //   ff15????????         |                     
            //   488d15005f0000       | dec                 eax
            //   488bce               | lea                 ecx, [0x3313]
            //   488905????????       |                     
            //   ff15????????         |                     

        $sequence_5 = { 488d4b04 4c8d05a33e0000 ba16000000 e8???????? }
            // n = 4, score = 500
            //   488d4b04             | dec                 eax
            //   4c8d05a33e0000       | lea                 ecx, [ebx + 4]
            //   ba16000000           | dec                 esp
            //   e8????????           |                     

        $sequence_6 = { 85c0 755a 488d0d13330000 e8???????? 488d1da7a20000 488d3da8a20000 eb0e }
            // n = 7, score = 500
            //   85c0                 | test                eax, eax
            //   755a                 | je                  0x1b
            //   488d0d13330000       | dec                 eax
            //   e8????????           |                     
            //   488d1da7a20000       | lea                 edx, [0xa483]
            //   488d3da8a20000       | test                eax, eax
            //   eb0e                 | jne                 0x5c

        $sequence_7 = { 57 4883ec20 488d1d67930000 488d3d60930000 eb0e }
            // n = 5, score = 500
            //   57                   | dec                 eax
            //   4883ec20             | lea                 ebx, [0xa2a7]
            //   488d1d67930000       | dec                 eax
            //   488d3d60930000       | lea                 edi, [0xa2a8]
            //   eb0e                 | jmp                 0x10

        $sequence_8 = { 8d542410 f2ae f7d1 2bf9 682b010000 }
            // n = 5, score = 100
            //   8d542410             | lea                 eax, [0x1576]
            //   f2ae                 | mov                 cl, al
            //   f7d1                 | add                 cl, 0x20
            //   2bf9                 | mov                 byte ptr [eax + 0x10094900], cl
            //   682b010000           | jmp                 0x2a

        $sequence_9 = { eb02 33c0 0fbe84c1a8950010 c1f804 }
            // n = 4, score = 100
            //   eb02                 | push                ecx
            //   33c0                 | lea                 edi, [esp + 0x594]
            //   0fbe84c1a8950010     | or                  ecx, 0xffffffff
            //   c1f804               | xor                 eax, eax

        $sequence_10 = { 8d8c248c0d0000 50 51 e8???????? 8dbc2494050000 83c9ff 33c0 }
            // n = 7, score = 100
            //   8d8c248c0d0000       | dec                 eax
            //   50                   | sub                 edi, ebx
            //   51                   | nop                 dword ptr [eax]
            //   e8????????           |                     
            //   8dbc2494050000       | dec                 esp
            //   83c9ff               | mov                 eax, dword ptr [esi + 0x38]
            //   33c0                 | dec                 ecx

        $sequence_11 = { 83e01f 8b0c8d204b0910 8d04c0 8d0481 eb05 b8???????? }
            // n = 6, score = 100
            //   83e01f               | cmp                 eax, 0x61
            //   8b0c8d204b0910       | jb                  0x23
            //   8d04c0               | cmp                 eax, 0x7a
            //   8d0481               | lea                 ecx, [esp + 0xd8c]
            //   eb05                 | push                eax
            //   b8????????           |                     

        $sequence_12 = { b801000000 5b 81c47c150000 c3 5f 5e 33c0 }
            // n = 7, score = 100
            //   b801000000           | mov                 ecx, esp
            //   5b                   | movzx               edx, ax
            //   81c47c150000         | dec                 eax
            //   c3                   | lea                 eax, [0x157a]
            //   5f                   | dec                 eax
            //   5e                   | lea                 eax, [0x2090]
            //   33c0                 | dec                 eax

        $sequence_13 = { c1f805 8d1c85204b0910 8b4508 83e01f 8d34c0 8b03 c1e602 }
            // n = 7, score = 100
            //   c1f805               | mov                 eax, 1
            //   8d1c85204b0910       | pop                 ebx
            //   8b4508               | add                 esp, 0x157c
            //   83e01f               | ret                 
            //   8d34c0               | pop                 edi
            //   8b03                 | pop                 esi
            //   c1e602               | xor                 eax, eax

        $sequence_14 = { 8d4c240c 89442412 51 8944241a 66895c2410 668944241e ff15???????? }
            // n = 7, score = 100
            //   8d4c240c             | lea                 edx, [esp + 0x10]
            //   89442412             | repne scasb         al, byte ptr es:[edi]
            //   51                   | not                 ecx
            //   8944241a             | sub                 edi, ecx
            //   66895c2410           | push                0x12b
            //   668944241e           | and                 eax, 0x1f
            //   ff15????????         |                     

        $sequence_15 = { 8ac8 80c120 888800490910 eb1f 83f861 7213 83f87a }
            // n = 7, score = 100
            //   8ac8                 | jne                 7
            //   80c120               | dec                 edx
            //   888800490910         | lea                 edx, [eax + ebp + 2]
            //   eb1f                 | call                dword ptr [esi + 0x28]
            //   83f861               | dec                 eax
            //   7213                 | mov                 dword ptr [edi + ebx], eax
            //   83f87a               | je                  0x39

    condition:
        7 of them and filesize < 1458176
}