rule win_socksbot_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.socksbot"
        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 = { 8bf0 ff15???????? 56 ff15???????? 6800000002 57 }
            // n = 6, score = 300
            //   8bf0                 | mov                 esi, eax
            //   ff15????????         |                     
            //   56                   | push                esi
            //   ff15????????         |                     
            //   6800000002           | push                0x2000000
            //   57                   | push                edi

        $sequence_1 = { 53 8a1d???????? 56 8b35???????? }
            // n = 4, score = 300
            //   53                   | push                ebx
            //   8a1d????????         |                     
            //   56                   | push                esi
            //   8b35????????         |                     

        $sequence_2 = { 8d45fc 50 57 ffd6 8d85fcfdffff 50 68???????? }
            // n = 7, score = 300
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   50                   | push                eax
            //   57                   | push                edi
            //   ffd6                 | call                esi
            //   8d85fcfdffff         | lea                 eax, [ebp - 0x204]
            //   50                   | push                eax
            //   68????????           |                     

        $sequence_3 = { 5f c9 c20400 55 8bec 81ec0c030000 33c9 }
            // n = 7, score = 300
            //   5f                   | pop                 edi
            //   c9                   | leave               
            //   c20400               | ret                 4
            //   55                   | push                ebp
            //   8bec                 | mov                 ebp, esp
            //   81ec0c030000         | sub                 esp, 0x30c
            //   33c9                 | xor                 ecx, ecx

        $sequence_4 = { 0bc1 a3???????? c3 55 }
            // n = 4, score = 300
            //   0bc1                 | or                  eax, ecx
            //   a3????????           |                     
            //   c3                   | ret                 
            //   55                   | push                ebp

        $sequence_5 = { eb03 832700 ff7604 ff15???????? 83a60800010000 }
            // n = 5, score = 300
            //   eb03                 | jmp                 5
            //   832700               | and                 dword ptr [edi], 0
            //   ff7604               | push                dword ptr [esi + 4]
            //   ff15????????         |                     
            //   83a60800010000       | and                 dword ptr [esi + 0x10008], 0

        $sequence_6 = { 56 57 e8???????? 8d8520fdffff 6a0a 50 }
            // n = 6, score = 300
            //   56                   | push                esi
            //   57                   | push                edi
            //   e8????????           |                     
            //   8d8520fdffff         | lea                 eax, [ebp - 0x2e0]
            //   6a0a                 | push                0xa
            //   50                   | push                eax

        $sequence_7 = { 85c0 784e 03f0 83fe04 7e0a 817c3efc0d0a0d0a 743f }
            // n = 7, score = 300
            //   85c0                 | test                eax, eax
            //   784e                 | js                  0x50
            //   03f0                 | add                 esi, eax
            //   83fe04               | cmp                 esi, 4
            //   7e0a                 | jle                 0xc
            //   817c3efc0d0a0d0a     | cmp                 dword ptr [esi + edi - 4], 0xa0d0a0d
            //   743f                 | je                  0x41

        $sequence_8 = { 83c614 837e0c00 758d b001 }
            // n = 4, score = 300
            //   83c614               | add                 esi, 0x14
            //   837e0c00             | cmp                 dword ptr [esi + 0xc], 0
            //   758d                 | jne                 0xffffff8f
            //   b001                 | mov                 al, 1

        $sequence_9 = { 8a1c39 41 3b4d0c 7cce 5f 8935???????? }
            // n = 6, score = 300
            //   8a1c39               | mov                 bl, byte ptr [ecx + edi]
            //   41                   | inc                 ecx
            //   3b4d0c               | cmp                 ecx, dword ptr [ebp + 0xc]
            //   7cce                 | jl                  0xffffffd0
            //   5f                   | pop                 edi
            //   8935????????         |                     

    condition:
        7 of them and filesize < 73728
}