rule win_torrentlocker_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        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 = "20230124"
        malpedia_hash = "2ee0eebba83dce3d019a90519f2f972c0fcf9686"
        malpedia_version = "20230125"
        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 = { 740a 48 85c0 7ff4 5f 33c0 5e }
            // n = 7, score = 400
            //   740a                 | je                  0xc
            //   48                   | dec                 eax
            //   85c0                 | test                eax, eax
            //   7ff4                 | jg                  0xfffffff6
            //   5f                   | pop                 edi
            //   33c0                 | xor                 eax, eax
            //   5e                   | pop                 esi

        $sequence_2 = { 7514 e8???????? 3d00000600 1bc0 40 }
            // n = 5, score = 400
            //   7514                 | jne                 0x16
            //   e8????????           |                     
            //   3d00000600           | cmp                 eax, 0x60000
            //   1bc0                 | sbb                 eax, eax
            //   40                   | inc                 eax

        $sequence_3 = { 6a01 6a00 0d00800000 50 6a00 }
            // n = 5, score = 400
            //   6a01                 | push                1
            //   6a00                 | push                0
            //   0d00800000           | or                  eax, 0x8000
            //   50                   | push                eax
            //   6a00                 | push                0

        $sequence_4 = { be03000000 8bc6 5e 5f c3 be02000000 8bc6 }
            // n = 7, score = 400
            //   be03000000           | mov                 esi, 3
            //   8bc6                 | mov                 eax, esi
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi
            //   c3                   | ret                 
            //   be02000000           | mov                 esi, 2
            //   8bc6                 | mov                 eax, esi

        $sequence_5 = { 7522 68???????? ff15???????? 85c0 7413 }
            // n = 5, score = 400
            //   7522                 | jne                 0x24
            //   68????????           |                     
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7413                 | je                  0x15

        $sequence_6 = { 50 a1???????? 56 50 ff15???????? 85c0 8d4601 }
            // n = 7, score = 400
            //   50                   | push                eax
            //   a1????????           |                     
            //   56                   | push                esi
            //   50                   | push                eax
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   8d4601               | lea                 eax, [esi + 1]

        $sequence_7 = { 6a00 51 ff15???????? 8bc6 5e 5f }
            // n = 6, score = 400
            //   6a00                 | push                0
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   8bc6                 | mov                 eax, esi
            //   5e                   | pop                 esi
            //   5f                   | pop                 edi

        $sequence_8 = { c3 b904000000 8bc1 5e }
            // n = 4, score = 400
            //   c3                   | ret                 
            //   b904000000           | mov                 ecx, 4
            //   8bc1                 | mov                 eax, ecx
            //   5e                   | pop                 esi

        $sequence_9 = { 85c0 7525 68???????? b8???????? bb???????? e8???????? }
            // n = 6, score = 400
            //   85c0                 | test                eax, eax
            //   7525                 | jne                 0x27
            //   68????????           |                     
            //   b8????????           |                     
            //   bb????????           |                     
            //   e8????????           |                     

        $sequence_10 = { 68???????? 895608 ffd7 85c0 753c }
            // n = 5, score = 400
            //   68????????           |                     
            //   895608               | mov                 dword ptr [esi + 8], edx
            //   ffd7                 | call                edi
            //   85c0                 | test                eax, eax
            //   753c                 | jne                 0x3e

        $sequence_11 = { 75ef 03fb b8???????? 8d143f 2bd0 }
            // n = 5, score = 400
            //   75ef                 | jne                 0xfffffff1
            //   03fb                 | add                 edi, ebx
            //   b8????????           |                     
            //   8d143f               | lea                 edx, [edi + edi]
            //   2bd0                 | sub                 edx, eax

        $sequence_12 = { 7519 8b0d???????? 51 ff15???????? c705????????00000000 eb39 8b15???????? }
            // n = 7, score = 400
            //   7519                 | jne                 0x1b
            //   8b0d????????         |                     
            //   51                   | push                ecx
            //   ff15????????         |                     
            //   c705????????00000000     |     
            //   eb39                 | jmp                 0x3b
            //   8b15????????         |                     

        $sequence_13 = { 750b 68???????? ff15???????? 8bc3 }
            // n = 4, score = 400
            //   750b                 | jne                 0xd
            //   68????????           |                     
            //   ff15????????         |                     
            //   8bc3                 | mov                 eax, ebx

        $sequence_14 = { 8bcf c1e90b 33c8 c1e908 }
            // n = 4, score = 400
            //   8bcf                 | mov                 ecx, edi
            //   c1e90b               | shr                 ecx, 0xb
            //   33c8                 | xor                 ecx, eax
            //   c1e908               | shr                 ecx, 8

        $sequence_15 = { 6a01 68???????? ff15???????? 85c0 7522 68???????? }
            // n = 6, score = 400
            //   6a01                 | push                1
            //   68????????           |                     
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7522                 | jne                 0x24
            //   68????????           |                     

    condition:
        7 of them and filesize < 933888
}