rule win_jolob_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.jolob."
        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.jolob"
        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 = { 8b33 85f6 7411 e8???????? }
            // n = 4, score = 300
            //   8b33                 | mov                 esi, dword ptr [ebx]
            //   85f6                 | test                esi, esi
            //   7411                 | je                  0x13
            //   e8????????           |                     

        $sequence_1 = { 897df8 e8???????? 8b7df8 8b5f10 }
            // n = 4, score = 300
            //   897df8               | mov                 dword ptr [ebp - 8], edi
            //   e8????????           |                     
            //   8b7df8               | mov                 edi, dword ptr [ebp - 8]
            //   8b5f10               | mov                 ebx, dword ptr [edi + 0x10]

        $sequence_2 = { 8d45f4 2945fc 83c710 897df8 8d45e4 8bf3 33c9 }
            // n = 7, score = 300
            //   8d45f4               | lea                 eax, [ebp - 0xc]
            //   2945fc               | sub                 dword ptr [ebp - 4], eax
            //   83c710               | add                 edi, 0x10
            //   897df8               | mov                 dword ptr [ebp - 8], edi
            //   8d45e4               | lea                 eax, [ebp - 0x1c]
            //   8bf3                 | mov                 esi, ebx
            //   33c9                 | xor                 ecx, ecx

        $sequence_3 = { 8bec 56 33f6 397510 7627 8b4510 6a00 }
            // n = 7, score = 300
            //   8bec                 | mov                 ebp, esp
            //   56                   | push                esi
            //   33f6                 | xor                 esi, esi
            //   397510               | cmp                 dword ptr [ebp + 0x10], esi
            //   7627                 | jbe                 0x29
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   6a00                 | push                0

        $sequence_4 = { 837c240400 77e4 c3 eb14 85c0 }
            // n = 5, score = 300
            //   837c240400           | cmp                 dword ptr [esp + 4], 0
            //   77e4                 | ja                  0xffffffe6
            //   c3                   | ret                 
            //   eb14                 | jmp                 0x16
            //   85c0                 | test                eax, eax

        $sequence_5 = { 8b442404 85c0 7501 40 50 6842200000 ff15???????? }
            // n = 7, score = 300
            //   8b442404             | mov                 eax, dword ptr [esp + 4]
            //   85c0                 | test                eax, eax
            //   7501                 | jne                 3
            //   40                   | inc                 eax
            //   50                   | push                eax
            //   6842200000           | push                0x2042
            //   ff15????????         |                     

        $sequence_6 = { 57 6a10 8bf0 58 }
            // n = 4, score = 300
            //   57                   | push                edi
            //   6a10                 | push                0x10
            //   8bf0                 | mov                 esi, eax
            //   58                   | pop                 eax

        $sequence_7 = { 7e44 6a40 6800100000 50 8b46fc 0345f8 50 }
            // n = 7, score = 300
            //   7e44                 | jle                 0x46
            //   6a40                 | push                0x40
            //   6800100000           | push                0x1000
            //   50                   | push                eax
            //   8b46fc               | mov                 eax, dword ptr [esi - 4]
            //   0345f8               | add                 eax, dword ptr [ebp - 8]
            //   50                   | push                eax

        $sequence_8 = { eb03 8b4514 5e 5b 5d c21000 56 }
            // n = 7, score = 300
            //   eb03                 | jmp                 5
            //   8b4514               | mov                 eax, dword ptr [ebp + 0x14]
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx
            //   5d                   | pop                 ebp
            //   c21000               | ret                 0x10
            //   56                   | push                esi

        $sequence_9 = { 7416 8d4dfc 51 50 8b4508 }
            // n = 5, score = 300
            //   7416                 | je                  0x18
            //   8d4dfc               | lea                 ecx, [ebp - 4]
            //   51                   | push                ecx
            //   50                   | push                eax
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

    condition:
        7 of them and filesize < 196608
}