rule win_chinoxy_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2022-11-21"
        version = "1"
        description = "Detects win.chinoxy."
        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.chinoxy"
        malpedia_rule_date = "20221118"
        malpedia_hash = "e0702e2e6d1d00da65c8a29a4ebacd0a4c59e1af"
        malpedia_version = "20221125"
        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 = { 5d 5b 83c410 c3 8b542434 55 52 }
            // n = 7, score = 100
            //   5d                   | pop                 ebp
            //   5b                   | pop                 ebx
            //   83c410               | add                 esp, 0x10
            //   c3                   | ret                 
            //   8b542434             | mov                 edx, dword ptr [esp + 0x34]
            //   55                   | push                ebp
            //   52                   | push                edx

        $sequence_1 = { c744241400000000 743f 57 56 8bc8 e8???????? }
            // n = 6, score = 100
            //   c744241400000000     | mov                 dword ptr [esp + 0x14], 0
            //   743f                 | je                  0x41
            //   57                   | push                edi
            //   56                   | push                esi
            //   8bc8                 | mov                 ecx, eax
            //   e8????????           |                     

        $sequence_2 = { 894a08 894804 85ff 740a 83c704 57 ff15???????? }
            // n = 7, score = 100
            //   894a08               | mov                 dword ptr [edx + 8], ecx
            //   894804               | mov                 dword ptr [eax + 4], ecx
            //   85ff                 | test                edi, edi
            //   740a                 | je                  0xc
            //   83c704               | add                 edi, 4
            //   57                   | push                edi
            //   ff15????????         |                     

        $sequence_3 = { 894618 eb15 8bcb 33c0 8bd1 }
            // n = 5, score = 100
            //   894618               | mov                 dword ptr [esi + 0x18], eax
            //   eb15                 | jmp                 0x17
            //   8bcb                 | mov                 ecx, ebx
            //   33c0                 | xor                 eax, eax
            //   8bd1                 | mov                 edx, ecx

        $sequence_4 = { 8bc1 33d2 8b4c2404 894804 83c9ff 895008 89480c }
            // n = 7, score = 100
            //   8bc1                 | mov                 eax, ecx
            //   33d2                 | xor                 edx, edx
            //   8b4c2404             | mov                 ecx, dword ptr [esp + 4]
            //   894804               | mov                 dword ptr [eax + 4], ecx
            //   83c9ff               | or                  ecx, 0xffffffff
            //   895008               | mov                 dword ptr [eax + 8], edx
            //   89480c               | mov                 dword ptr [eax + 0xc], ecx

        $sequence_5 = { eb01 56 ffd7 8bf0 83c408 85f6 }
            // n = 6, score = 100
            //   eb01                 | jmp                 3
            //   56                   | push                esi
            //   ffd7                 | call                edi
            //   8bf0                 | mov                 esi, eax
            //   83c408               | add                 esp, 8
            //   85f6                 | test                esi, esi

        $sequence_6 = { e8???????? 83c40c 6a00 6800100000 6a00 50 e8???????? }
            // n = 7, score = 100
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   6a00                 | push                0
            //   6800100000           | push                0x1000
            //   6a00                 | push                0
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_7 = { 85c0 742b 8b551c 52 56 ff15???????? }
            // n = 6, score = 100
            //   85c0                 | test                eax, eax
            //   742b                 | je                  0x2d
            //   8b551c               | mov                 edx, dword ptr [ebp + 0x1c]
            //   52                   | push                edx
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_8 = { 8bf9 33db c744241410590110 8d6f08 3beb }
            // n = 5, score = 100
            //   8bf9                 | mov                 edi, ecx
            //   33db                 | xor                 ebx, ebx
            //   c744241410590110     | mov                 dword ptr [esp + 0x14], 0x10015910
            //   8d6f08               | lea                 ebp, [edi + 8]
            //   3beb                 | cmp                 ebp, ebx

        $sequence_9 = { c644242d73 c644242e67 c644242f57 c644243061 c644243169 884c2432 c644243346 }
            // n = 7, score = 100
            //   c644242d73           | mov                 byte ptr [esp + 0x2d], 0x73
            //   c644242e67           | mov                 byte ptr [esp + 0x2e], 0x67
            //   c644242f57           | mov                 byte ptr [esp + 0x2f], 0x57
            //   c644243061           | mov                 byte ptr [esp + 0x30], 0x61
            //   c644243169           | mov                 byte ptr [esp + 0x31], 0x69
            //   884c2432             | mov                 byte ptr [esp + 0x32], cl
            //   c644243346           | mov                 byte ptr [esp + 0x33], 0x46

    condition:
        7 of them and filesize < 1138688
}