rule win_cotx_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.cotx."
        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.cotx"
        malpedia_rule_date = "20230705"
        malpedia_hash = "42d0574f4405bd7d2b154d321d345acb18834a41"
        malpedia_version = "20230715"
        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 = { 50 c78504fcffff52643332 c78508fcffff2e657865 e8???????? 83ec20 8d8d00fcffff }
            // n = 6, score = 500
            //   50                   | push                eax
            //   c78504fcffff52643332     | mov    dword ptr [ebp - 0x3fc], 0x32336452
            //   c78508fcffff2e657865     | mov    dword ptr [ebp - 0x3f8], 0x6578652e
            //   e8????????           |                     
            //   83ec20               | sub                 esp, 0x20
            //   8d8d00fcffff         | lea                 ecx, [ebp - 0x400]

        $sequence_1 = { c78504fcffff52643332 c78508fcffff2e657865 e8???????? 83ec20 }
            // n = 4, score = 500
            //   c78504fcffff52643332     | mov    dword ptr [ebp - 0x3fc], 0x32336452
            //   c78508fcffff2e657865     | mov    dword ptr [ebp - 0x3f8], 0x6578652e
            //   e8????????           |                     
            //   83ec20               | sub                 esp, 0x20

        $sequence_2 = { e8???????? 83ec20 8d8d00fcffff e8???????? 68f6030000 8d850af8ffff }
            // n = 6, score = 500
            //   e8????????           |                     
            //   83ec20               | sub                 esp, 0x20
            //   8d8d00fcffff         | lea                 ecx, [ebp - 0x400]
            //   e8????????           |                     
            //   68f6030000           | push                0x3f6
            //   8d850af8ffff         | lea                 eax, [ebp - 0x7f6]

        $sequence_3 = { c705????????0c56aef3 c705????????c8a4ea05 c705????????69e053a4 c705????????120d934e }
            // n = 4, score = 500
            //   c705????????0c56aef3     |     
            //   c705????????c8a4ea05     |     
            //   c705????????69e053a4     |     
            //   c705????????120d934e     |     

        $sequence_4 = { 8d8d00fcffff e8???????? 68f6030000 8d850af8ffff c78500f8ffff52617354 }
            // n = 5, score = 500
            //   8d8d00fcffff         | lea                 ecx, [ebp - 0x400]
            //   e8????????           |                     
            //   68f6030000           | push                0x3f6
            //   8d850af8ffff         | lea                 eax, [ebp - 0x7f6]
            //   c78500f8ffff52617354     | mov    dword ptr [ebp - 0x800], 0x54736152

        $sequence_5 = { 53 6a00 ff75ec ff15???????? }
            // n = 4, score = 500
            //   53                   | push                ebx
            //   6a00                 | push                0
            //   ff75ec               | push                dword ptr [ebp - 0x14]
            //   ff15????????         |                     

        $sequence_6 = { 83c40c 0f1145b0 56 50 8d85b0fbffff }
            // n = 5, score = 500
            //   83c40c               | add                 esp, 0xc
            //   0f1145b0             | movups              xmmword ptr [ebp - 0x50], xmm0
            //   56                   | push                esi
            //   50                   | push                eax
            //   8d85b0fbffff         | lea                 eax, [ebp - 0x450]

        $sequence_7 = { 6a00 ff7508 ff75e4 ff15???????? ff75e4 }
            // n = 5, score = 500
            //   6a00                 | push                0
            //   ff7508               | push                dword ptr [ebp + 8]
            //   ff75e4               | push                dword ptr [ebp - 0x1c]
            //   ff15????????         |                     
            //   ff75e4               | push                dword ptr [ebp - 0x1c]

        $sequence_8 = { e8???????? 0f2805???????? 8d45b0 83c40c }
            // n = 4, score = 500
            //   e8????????           |                     
            //   0f2805????????       |                     
            //   8d45b0               | lea                 eax, [ebp - 0x50]
            //   83c40c               | add                 esp, 0xc

        $sequence_9 = { e8???????? 83c40c 8d85c0f2ffff 50 }
            // n = 4, score = 500
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   8d85c0f2ffff         | lea                 eax, [ebp - 0xd40]
            //   50                   | push                eax

    condition:
        7 of them and filesize < 1171456
}