rule win_quantloader_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2020-12-22"
        version = "1"
        description = "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.quantloader"
        malpedia_rule_date = "20201222"
        malpedia_hash = "30354d830a29f0fbd3714d93d94dea941d77a130"
        malpedia_version = "20201023"
        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 = { eb17 8b45f8 890424 e8???????? 83ec04 c745f400000000 }
            // n = 6, score = 500
            //   eb17                 | jmp                 0x19
            //   8b45f8               | mov                 eax, dword ptr [ebp - 8]
            //   890424               | mov                 dword ptr [esp], eax
            //   e8????????           |                     
            //   83ec04               | sub                 esp, 4
            //   c745f400000000       | mov                 dword ptr [ebp - 0xc], 0

        $sequence_1 = { 8d45fc 8944240c c744240800000000 8b4510 89442404 }
            // n = 5, score = 500
            //   8d45fc               | lea                 eax, [ebp - 4]
            //   8944240c             | mov                 dword ptr [esp + 0xc], eax
            //   c744240800000000     | mov                 dword ptr [esp + 8], 0
            //   8b4510               | mov                 eax, dword ptr [ebp + 0x10]
            //   89442404             | mov                 dword ptr [esp + 4], eax

        $sequence_2 = { 55 89e5 83ec18 83e4f0 b800000000 }
            // n = 5, score = 500
            //   55                   | push                ebp
            //   89e5                 | mov                 ebp, esp
            //   83ec18               | sub                 esp, 0x18
            //   83e4f0               | and                 esp, 0xfffffff0
            //   b800000000           | mov                 eax, 0

        $sequence_3 = { 8945f8 b8???????? c9 c3 55 89e5 83ec28 }
            // n = 7, score = 500
            //   8945f8               | mov                 dword ptr [ebp - 8], eax
            //   b8????????           |                     
            //   c9                   | leave               
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   89e5                 | mov                 ebp, esp
            //   83ec28               | sub                 esp, 0x28

        $sequence_4 = { e8???????? c7442408???????? 89442404 c7042402000080 e8???????? 0fb6c0 83f801 }
            // n = 7, score = 500
            //   e8????????           |                     
            //   c7442408????????     |                     
            //   89442404             | mov                 dword ptr [esp + 4], eax
            //   c7042402000080       | mov                 dword ptr [esp], 0x80000002
            //   e8????????           |                     
            //   0fb6c0               | movzx               eax, al
            //   83f801               | cmp                 eax, 1

        $sequence_5 = { 85c0 0f94c0 0fb6c0 08d8 84c0 }
            // n = 5, score = 500
            //   85c0                 | test                eax, eax
            //   0f94c0               | sete                al
            //   0fb6c0               | movzx               eax, al
            //   08d8                 | or                  al, bl
            //   84c0                 | test                al, al

        $sequence_6 = { c744241800000000 c744241410000000 c744241000000000 c744240c00000000 }
            // n = 4, score = 500
            //   c744241800000000     | mov                 dword ptr [esp + 0x18], 0
            //   c744241410000000     | mov                 dword ptr [esp + 0x14], 0x10
            //   c744241000000000     | mov                 dword ptr [esp + 0x10], 0
            //   c744240c00000000     | mov                 dword ptr [esp + 0xc], 0

        $sequence_7 = { 89e5 83ec18 c744240800000000 c7442404???????? 8b4508 }
            // n = 5, score = 500
            //   89e5                 | mov                 ebp, esp
            //   83ec18               | sub                 esp, 0x18
            //   c744240800000000     | mov                 dword ptr [esp + 8], 0
            //   c7442404????????     |                     
            //   8b4508               | mov                 eax, dword ptr [ebp + 8]

        $sequence_8 = { ad 85c0 740e 53 56 }
            // n = 5, score = 100
            //   ad                   | lodsd               eax, dword ptr [esi]
            //   85c0                 | test                eax, eax
            //   740e                 | je                  0x10
            //   53                   | push                ebx
            //   56                   | push                esi

        $sequence_9 = { 81ec20020000 b824020000 50 33f6 6a00 6a08 ff551c }
            // n = 7, score = 100
            //   81ec20020000         | sub                 esp, 0x220
            //   b824020000           | mov                 eax, 0x224
            //   50                   | push                eax
            //   33f6                 | xor                 esi, esi
            //   6a00                 | push                0
            //   6a08                 | push                8
            //   ff551c               | call                dword ptr [ebp + 0x1c]

        $sequence_10 = { c3 60 ff553c 8bd8 8b7554 }
            // n = 5, score = 100
            //   c3                   | ret                 
            //   60                   | pushal              
            //   ff553c               | call                dword ptr [ebp + 0x3c]
            //   8bd8                 | mov                 ebx, eax
            //   8b7554               | mov                 esi, dword ptr [ebp + 0x54]

        $sequence_11 = { b940000000 48 7410 b904000000 48 }
            // n = 5, score = 100
            //   b940000000           | mov                 ecx, 0x40
            //   48                   | dec                 eax
            //   7410                 | je                  0x12
            //   b904000000           | mov                 ecx, 4
            //   48                   | dec                 eax

        $sequence_12 = { 58 57 ab f3a5 }
            // n = 4, score = 100
            //   58                   | pop                 eax
            //   57                   | push                edi
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   f3a5                 | rep movsd           dword ptr es:[edi], dword ptr [esi]

        $sequence_13 = { 58 ff6050 55 e8???????? }
            // n = 4, score = 100
            //   58                   | pop                 eax
            //   ff6050               | jmp                 dword ptr [eax + 0x50]
            //   55                   | push                ebp
            //   e8????????           |                     

        $sequence_14 = { 7804 7402 ebf7 33c0 03c2 }
            // n = 5, score = 100
            //   7804                 | js                  6
            //   7402                 | je                  4
            //   ebf7                 | jmp                 0xfffffff9
            //   33c0                 | xor                 eax, eax
            //   03c2                 | add                 eax, edx

        $sequence_15 = { 7430 b902000000 48 7428 }
            // n = 4, score = 100
            //   7430                 | je                  0x32
            //   b902000000           | mov                 ecx, 2
            //   48                   | dec                 eax
            //   7428                 | je                  0x2a

    condition:
        7 of them and filesize < 155648
}