rule win_socksbot_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-09-17"
        version = "1"
        description = "Detects win.socksbot."
        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.socksbot"
        malpedia_rule_date = "20260916"
        malpedia_hash = "53a643781c18e08f4a50949af60172d837a0b6f6"
        malpedia_version = "20260917"
        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 = { ff75fc e8???????? 8325????????00 59 }
            // n = 4, score = 300
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   e8????????           |                     
            //   8325????????00       |                     
            //   59                   | pop                 ecx

        $sequence_1 = { 8bd0 881a 42 49 75fa 5b }
            // n = 6, score = 300
            //   8bd0                 | mov                 edx, eax
            //   881a                 | mov                 byte ptr [edx], bl
            //   42                   | inc                 edx
            //   49                   | dec                 ecx
            //   75fa                 | jne                 0xfffffffc
            //   5b                   | pop                 ebx

        $sequence_2 = { 4b ebdc 64a130000000 895de0 8b400c c745d803000000 8b4014 }
            // n = 7, score = 300
            //   4b                   | dec                 ebx
            //   ebdc                 | jmp                 0xffffffde
            //   64a130000000         | mov                 eax, dword ptr fs:[0x30]
            //   895de0               | mov                 dword ptr [ebp - 0x20], ebx
            //   8b400c               | mov                 eax, dword ptr [eax + 0xc]
            //   c745d803000000       | mov                 dword ptr [ebp - 0x28], 3
            //   8b4014               | mov                 eax, dword ptr [eax + 0x14]

        $sequence_3 = { eb02 33db 0fb6fc 6bff0c 81c7???????? 56 }
            // n = 6, score = 300
            //   eb02                 | jmp                 4
            //   33db                 | xor                 ebx, ebx
            //   0fb6fc               | movzx               edi, ah
            //   6bff0c               | imul                edi, edi, 0xc
            //   81c7????????         |                     
            //   56                   | push                esi

        $sequence_4 = { e9???????? 807b0101 0f85f6000000 33c0 89450c 884301 8a4303 }
            // n = 7, score = 300
            //   e9????????           |                     
            //   807b0101             | cmp                 byte ptr [ebx + 1], 1
            //   0f85f6000000         | jne                 0xfc
            //   33c0                 | xor                 eax, eax
            //   89450c               | mov                 dword ptr [ebp + 0xc], eax
            //   884301               | mov                 byte ptr [ebx + 1], al
            //   8a4303               | mov                 al, byte ptr [ebx + 3]

        $sequence_5 = { 7ce2 8b5d08 8d043e c6041800 8d45e4 }
            // n = 5, score = 300
            //   7ce2                 | jl                  0xffffffe4
            //   8b5d08               | mov                 ebx, dword ptr [ebp + 8]
            //   8d043e               | lea                 eax, [esi + edi]
            //   c6041800             | mov                 byte ptr [eax + ebx], 0
            //   8d45e4               | lea                 eax, [ebp - 0x1c]

        $sequence_6 = { 68???????? c605????????00 c605????????00 e8???????? 59 59 }
            // n = 6, score = 300
            //   68????????           |                     
            //   c605????????00       |                     
            //   c605????????00       |                     
            //   e8????????           |                     
            //   59                   | pop                 ecx
            //   59                   | pop                 ecx

        $sequence_7 = { 50 57 ffd3 85c0 7e0d 6a05 6a00 }
            // n = 7, score = 300
            //   50                   | push                eax
            //   57                   | push                edi
            //   ffd3                 | call                ebx
            //   85c0                 | test                eax, eax
            //   7e0d                 | jle                 0xf
            //   6a05                 | push                5
            //   6a00                 | push                0

        $sequence_8 = { 6a00 68e3000000 ff75fc 13f2 }
            // n = 4, score = 300
            //   6a00                 | push                0
            //   68e3000000           | push                0xe3
            //   ff75fc               | push                dword ptr [ebp - 4]
            //   13f2                 | adc                 esi, edx

        $sequence_9 = { 803e00 894dfc 7405 8d7e01 ebbb 5f }
            // n = 6, score = 300
            //   803e00               | cmp                 byte ptr [esi], 0
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   7405                 | je                  7
            //   8d7e01               | lea                 edi, [esi + 1]
            //   ebbb                 | jmp                 0xffffffbd
            //   5f                   | pop                 edi

    condition:
        7 of them and filesize < 73728
}