rule win_chiser_client_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-01-25"
        version = "1"
        description = "Detects win.chiser_client."
        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.chiser_client"
        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 = { e8???????? 488d152a1f0200 488d4c2440 e8???????? cc ff15???????? }
            // n = 6, score = 100
            //   e8????????           |                     
            //   488d152a1f0200       | dec                 eax
            //   488d4c2440           | lea                 ecx, [ecx + 0x80]
            //   e8????????           |                     
            //   cc                   | movups              xmmword ptr [eax - 0x80], xmm0
            //   ff15????????         |                     

        $sequence_1 = { c0e806 410fb6ce c0e902 4002f8 0fb6c1 410fb6d7 80e23f }
            // n = 7, score = 100
            //   c0e806               | dec                 eax
            //   410fb6ce             | mov                 edi, dword ptr [ebx]
            //   c0e902               | dec                 esp
            //   4002f8               | mov                 dword ptr [ebp - 0x70], esi
            //   0fb6c1               | dec                 ecx
            //   410fb6d7             | mov                 ecx, dword ptr [ebp]
            //   80e23f               | dec                 eax

        $sequence_2 = { 48894710 488d542430 ff15???????? b905010000 e8???????? ba04010000 }
            // n = 6, score = 100
            //   48894710             | push                esp
            //   488d542430           | dec                 eax
            //   ff15????????         |                     
            //   b905010000           | sub                 esp, 0x28
            //   e8????????           |                     
            //   ba04010000           | dec                 ebp

        $sequence_3 = { ff15???????? 3db7000000 7531 488bcb ff15???????? 33c0 488b4df8 }
            // n = 7, score = 100
            //   ff15????????         |                     
            //   3db7000000           | dec                 eax
            //   7531                 | mov                 ebx, dword ptr [esp + 0x50]
            //   488bcb               | dec                 eax
            //   ff15????????         |                     
            //   33c0                 | mov                 ebp, dword ptr [esp + 0x58]
            //   488b4df8             | dec                 eax

        $sequence_4 = { 48ffc1 483bca 7ce3 413bd8 750a b805000000 }
            // n = 6, score = 100
            //   48ffc1               | dec                 eax
            //   483bca               | lea                 edx, [0x2df64]
            //   7ce3                 | dec                 eax
            //   413bd8               | lea                 edx, [0x2df6a]
            //   750a                 | dec                 eax
            //   b805000000           | mov                 ecx, ebx

        $sequence_5 = { 488d1564df0200 488bcb 488905???????? ff15???????? }
            // n = 4, score = 100
            //   488d1564df0200       | inc                 ebp
            //   488bcb               | mov                 ebp, ecx
            //   488905????????       |                     
            //   ff15????????         |                     

        $sequence_6 = { 488bc8 e8???????? 4c634e08 488d146d00000000 4c8b06 4d03c9 488bc8 }
            // n = 7, score = 100
            //   488bc8               | mov                 dword ptr [esp + 0x18], ebp
            //   e8????????           |                     
            //   4c634e08             | dec                 eax
            //   488d146d00000000     | mov                 dword ptr [esp + 0x20], edi
            //   4c8b06               | inc                 ecx
            //   4d03c9               | push                esi
            //   488bc8               | dec                 eax

        $sequence_7 = { 488bcf e8???????? 4883c308 48ffc6 493bf6 75d2 4c8b642448 }
            // n = 7, score = 100
            //   488bcf               | dec                 eax
            //   e8????????           |                     
            //   4883c308             | mov                 esi, edx
            //   48ffc6               | dec                 eax
            //   493bf6               | mov                 ebp, ecx
            //   75d2                 | dec                 eax
            //   4c8b642448           | test                edx, edx

        $sequence_8 = { 48f7e5 48c7c1ffffffff 480f40c1 488bc8 e8???????? 4c634e08 488d146d00000000 }
            // n = 7, score = 100
            //   48f7e5               | mov                 ebx, dword ptr [esp + 0x30]
            //   48c7c1ffffffff       | xor                 eax, eax
            //   480f40c1             | dec                 eax
            //   488bc8               | mov                 edx, edi
            //   e8????????           |                     
            //   4c634e08             | dec                 esp
            //   488d146d00000000     | lea                 eax, [0x3976a]

        $sequence_9 = { 7872 3b1d???????? 736a 488bfb 4c8d3506b30300 83e73f }
            // n = 6, score = 100
            //   7872                 | jle                 0x184
            //   3b1d????????         |                     
            //   736a                 | dec                 eax
            //   488bfb               | lea                 ebx, [esp + 0x7c]
            //   4c8d3506b30300       | mov                 edi, eax
            //   83e73f               | cmp                 word ptr [edx + eax*2], 0

    condition:
        7 of them and filesize < 714752
}