rule win_torrentlocker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-05-16"
        version = "1"
        description = "Detects win.torrentlocker."
        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.torrentlocker"
        malpedia_rule_date = "20220513"
        malpedia_hash = "7f4b2229e6ae614d86d74917f6d5b41890e62a26"
        malpedia_version = "20220516"
        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 = { c3 83f801 7405 83f802 }
            // n = 4, score = 500
            //   c3                   | ret                 
            //   83f801               | cmp                 eax, 1
            //   7405                 | je                  7
            //   83f802               | cmp                 eax, 2

        $sequence_1 = { 40 83f806 72f1 33f6 }
            // n = 4, score = 400
            //   40                   | inc                 eax
            //   83f806               | cmp                 eax, 6
            //   72f1                 | jb                  0xfffffff3
            //   33f6                 | xor                 esi, esi

        $sequence_2 = { 0102 0102 0201 0202 0202 0202 }
            // n = 6, score = 400
            //   0102                 | add                 dword ptr [edx], eax
            //   0102                 | add                 dword ptr [edx], eax
            //   0201                 | add                 al, byte ptr [ecx]
            //   0202                 | add                 al, byte ptr [edx]
            //   0202                 | add                 al, byte ptr [edx]
            //   0202                 | add                 al, byte ptr [edx]

        $sequence_3 = { ffd6 83f801 7502 5e c3 }
            // n = 5, score = 400
            //   ffd6                 | call                esi
            //   83f801               | cmp                 eax, 1
            //   7502                 | jne                 4
            //   5e                   | pop                 esi
            //   c3                   | ret                 

        $sequence_4 = { 85db 7412 ff15???????? 33c9 3db7000000 }
            // n = 5, score = 400
            //   85db                 | test                ebx, ebx
            //   7412                 | je                  0x14
            //   ff15????????         |                     
            //   33c9                 | xor                 ecx, ecx
            //   3db7000000           | cmp                 eax, 0xb7

        $sequence_5 = { c705????????ffffffff 8b15???????? 6a00 6a01 68???????? 895608 }
            // n = 6, score = 400
            //   c705????????ffffffff     |     
            //   8b15????????         |                     
            //   6a00                 | push                0
            //   6a01                 | push                1
            //   68????????           |                     
            //   895608               | mov                 dword ptr [esi + 8], edx

        $sequence_6 = { 83f801 7526 68400000f0 50 6a00 6a00 68???????? }
            // n = 7, score = 400
            //   83f801               | cmp                 eax, 1
            //   7526                 | jne                 0x28
            //   68400000f0           | push                0xf0000040
            //   50                   | push                eax
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   68????????           |                     

        $sequence_7 = { 85c0 7510 6a78 50 68???????? }
            // n = 5, score = 400
            //   85c0                 | test                eax, eax
            //   7510                 | jne                 0x12
            //   6a78                 | push                0x78
            //   50                   | push                eax
            //   68????????           |                     

        $sequence_8 = { b801000000 81f9170000c0 7415 81f9340000c0 7407 85c9 750e }
            // n = 7, score = 400
            //   b801000000           | mov                 eax, 1
            //   81f9170000c0         | cmp                 ecx, 0xc0000017
            //   7415                 | je                  0x17
            //   81f9340000c0         | cmp                 ecx, 0xc0000034
            //   7407                 | je                  9
            //   85c9                 | test                ecx, ecx
            //   750e                 | jne                 0x10

        $sequence_9 = { 85c0 7412 83c8ff 5f }
            // n = 4, score = 400
            //   85c0                 | test                eax, eax
            //   7412                 | je                  0x14
            //   83c8ff               | or                  eax, 0xffffffff
            //   5f                   | pop                 edi

        $sequence_10 = { ff15???????? 85c0 8d4601 7502 8bc6 5e }
            // n = 6, score = 400
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   8d4601               | lea                 eax, [esi + 1]
            //   7502                 | jne                 4
            //   8bc6                 | mov                 eax, esi
            //   5e                   | pop                 esi

        $sequence_11 = { 8b35???????? 68000000f0 6a18 6a00 6a00 68???????? ffd6 }
            // n = 7, score = 400
            //   8b35????????         |                     
            //   68000000f0           | push                0xf0000000
            //   6a18                 | push                0x18
            //   6a00                 | push                0
            //   6a00                 | push                0
            //   68????????           |                     
            //   ffd6                 | call                esi

        $sequence_12 = { 85c0 751f ff15???????? 3d16000980 753d }
            // n = 5, score = 400
            //   85c0                 | test                eax, eax
            //   751f                 | jne                 0x21
            //   ff15????????         |                     
            //   3d16000980           | cmp                 eax, 0x80090016
            //   753d                 | jne                 0x3f

        $sequence_13 = { 3d16000980 753d 68080000f0 6a18 6a00 6a00 }
            // n = 6, score = 400
            //   3d16000980           | cmp                 eax, 0x80090016
            //   753d                 | jne                 0x3f
            //   68080000f0           | push                0xf0000008
            //   6a18                 | push                0x18
            //   6a00                 | push                0
            //   6a00                 | push                0

        $sequence_14 = { eb39 8b15???????? 6a0c 6a00 52 ffd6 }
            // n = 6, score = 400
            //   eb39                 | jmp                 0x3b
            //   8b15????????         |                     
            //   6a0c                 | push                0xc
            //   6a00                 | push                0
            //   52                   | push                edx
            //   ffd6                 | call                esi

        $sequence_15 = { 740e 51 50 a1???????? }
            // n = 4, score = 400
            //   740e                 | je                  0x10
            //   51                   | push                ecx
            //   50                   | push                eax
            //   a1????????           |                     

    condition:
        7 of them and filesize < 933888
}