rule win_defray_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.defray."
        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.defray"
        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 = { 8d4de8 e8???????? 83f8ff 742e 0f1f440000 8d45e8 }
            // n = 6, score = 200
            //   8d4de8               | lea                 ecx, [ebp - 0x18]
            //   e8????????           |                     
            //   83f8ff               | cmp                 eax, -1
            //   742e                 | je                  0x30
            //   0f1f440000           | nop                 dword ptr [eax + eax]
            //   8d45e8               | lea                 eax, [ebp - 0x18]

        $sequence_1 = { 99 f7fb 894dfc 8bd0 3bf2 0f8693000000 b955555515 }
            // n = 7, score = 200
            //   99                   | cdq                 
            //   f7fb                 | idiv                ebx
            //   894dfc               | mov                 dword ptr [ebp - 4], ecx
            //   8bd0                 | mov                 edx, eax
            //   3bf2                 | cmp                 esi, edx
            //   0f8693000000         | jbe                 0x99
            //   b955555515           | mov                 ecx, 0x15555555

        $sequence_2 = { 6afd 5f 56 ff15???????? 8bc7 eb13 56 }
            // n = 7, score = 200
            //   6afd                 | push                -3
            //   5f                   | pop                 edi
            //   56                   | push                esi
            //   ff15????????         |                     
            //   8bc7                 | mov                 eax, edi
            //   eb13                 | jmp                 0x15
            //   56                   | push                esi

        $sequence_3 = { 0f8567010000 81fe00020000 7e0c b8fcffffff 5f 5e 5b }
            // n = 7, score = 200
            //   0f8567010000         | jne                 0x16d
            //   81fe00020000         | cmp                 esi, 0x200
            //   7e0c                 | jle                 0xe
            //   b8fcffffff           | mov                 eax, 0xfffffffc
            //   5f                   | pop                 edi
            //   5e                   | pop                 esi
            //   5b                   | pop                 ebx

        $sequence_4 = { 8dbda0f5ffff be???????? ab ab ab ab ab }
            // n = 7, score = 200
            //   8dbda0f5ffff         | lea                 edi, [ebp - 0xa60]
            //   be????????           |                     
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax
            //   ab                   | stosd               dword ptr es:[edi], eax

        $sequence_5 = { 8b430c 89410c 8d4f08 8b4310 8907 8a4314 884704 }
            // n = 7, score = 200
            //   8b430c               | mov                 eax, dword ptr [ebx + 0xc]
            //   89410c               | mov                 dword ptr [ecx + 0xc], eax
            //   8d4f08               | lea                 ecx, [edi + 8]
            //   8b4310               | mov                 eax, dword ptr [ebx + 0x10]
            //   8907                 | mov                 dword ptr [edi], eax
            //   8a4314               | mov                 al, byte ptr [ebx + 0x14]
            //   884704               | mov                 byte ptr [edi + 4], al

        $sequence_6 = { 6a01 50 e8???????? 8bce 8945fc 2bcb }
            // n = 6, score = 200
            //   6a01                 | push                1
            //   50                   | push                eax
            //   e8????????           |                     
            //   8bce                 | mov                 ecx, esi
            //   8945fc               | mov                 dword ptr [ebp - 4], eax
            //   2bcb                 | sub                 ecx, ebx

        $sequence_7 = { 731c 83fe08 7d0a 8a8074e64600 8807 47 }
            // n = 6, score = 200
            //   731c                 | jae                 0x1e
            //   83fe08               | cmp                 esi, 8
            //   7d0a                 | jge                 0xc
            //   8a8074e64600         | mov                 al, byte ptr [eax + 0x46e674]
            //   8807                 | mov                 byte ptr [edi], al
            //   47                   | inc                 edi

        $sequence_8 = { c70424???????? e8???????? 8d8500feffff 50 }
            // n = 4, score = 200
            //   c70424????????       |                     
            //   e8????????           |                     
            //   8d8500feffff         | lea                 eax, [ebp - 0x200]
            //   50                   | push                eax

        $sequence_9 = { 50 56 ff15???????? 85c0 7579 ff15???????? 50 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   56                   | push                esi
            //   ff15????????         |                     
            //   85c0                 | test                eax, eax
            //   7579                 | jne                 0x7b
            //   ff15????????         |                     
            //   50                   | push                eax

    condition:
        7 of them and filesize < 1253376
}