rule win_bouncer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.bouncer."
        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.bouncer"
        malpedia_rule_date = "20230328"
        malpedia_hash = "9d2d75cef573c1c2d861f5197df8f563b05a305d"
        malpedia_version = "20230407"
        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 = { 68???????? e9???????? 80f92e 752a 6a08 }
            // n = 5, score = 200
            //   68????????           |                     
            //   e9????????           |                     
            //   80f92e               | cmp                 cl, 0x2e
            //   752a                 | jne                 0x2c
            //   6a08                 | push                8

        $sequence_1 = { 57 50 a1???????? 6a04 33db ff7510 891d???????? }
            // n = 7, score = 200
            //   57                   | push                edi
            //   50                   | push                eax
            //   a1????????           |                     
            //   6a04                 | push                4
            //   33db                 | xor                 ebx, ebx
            //   ff7510               | push                dword ptr [ebp + 0x10]
            //   891d????????         |                     

        $sequence_2 = { 0f84c90a0000 8d45dc 6a1c 50 53 e8???????? }
            // n = 6, score = 200
            //   0f84c90a0000         | je                  0xacf
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   6a1c                 | push                0x1c
            //   50                   | push                eax
            //   53                   | push                ebx
            //   e8????????           |                     

        $sequence_3 = { 0f84870e0000 50 ff15???????? 3bc3 }
            // n = 4, score = 200
            //   0f84870e0000         | je                  0xe8d
            //   50                   | push                eax
            //   ff15????????         |                     
            //   3bc3                 | cmp                 eax, ebx

        $sequence_4 = { 3910 740e 41 83c004 3b8db4feffff 72ed }
            // n = 6, score = 200
            //   3910                 | cmp                 dword ptr [eax], edx
            //   740e                 | je                  0x10
            //   41                   | inc                 ecx
            //   83c004               | add                 eax, 4
            //   3b8db4feffff         | cmp                 ecx, dword ptr [ebp - 0x14c]
            //   72ed                 | jb                  0xffffffef

        $sequence_5 = { 7c38 8b45bc 8b4dc8 03c8 53 }
            // n = 5, score = 200
            //   7c38                 | jl                  0x3a
            //   8b45bc               | mov                 eax, dword ptr [ebp - 0x44]
            //   8b4dc8               | mov                 ecx, dword ptr [ebp - 0x38]
            //   03c8                 | add                 ecx, eax
            //   53                   | push                ebx

        $sequence_6 = { 85c0 0f84db000000 8b45d8 3bc3 7638 8945f0 2bf0 }
            // n = 7, score = 200
            //   85c0                 | test                eax, eax
            //   0f84db000000         | je                  0xe1
            //   8b45d8               | mov                 eax, dword ptr [ebp - 0x28]
            //   3bc3                 | cmp                 eax, ebx
            //   7638                 | jbe                 0x3a
            //   8945f0               | mov                 dword ptr [ebp - 0x10], eax
            //   2bf0                 | sub                 esi, eax

        $sequence_7 = { 8935???????? ffd7 59 a3???????? 59 8d45e8 50 }
            // n = 7, score = 200
            //   8935????????         |                     
            //   ffd7                 | call                edi
            //   59                   | pop                 ecx
            //   a3????????           |                     
            //   59                   | pop                 ecx
            //   8d45e8               | lea                 eax, [ebp - 0x18]
            //   50                   | push                eax

        $sequence_8 = { 6800040000 50 e8???????? 83ec28 be???????? }
            // n = 5, score = 200
            //   6800040000           | push                0x400
            //   50                   | push                eax
            //   e8????????           |                     
            //   83ec28               | sub                 esp, 0x28
            //   be????????           |                     

        $sequence_9 = { 3bc6 7347 53 68???????? 68???????? ff74241c }
            // n = 6, score = 200
            //   3bc6                 | cmp                 eax, esi
            //   7347                 | jae                 0x49
            //   53                   | push                ebx
            //   68????????           |                     
            //   68????????           |                     
            //   ff74241c             | push                dword ptr [esp + 0x1c]

    condition:
        7 of them and filesize < 335872
}