rule win_bouncer_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        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 = "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 = { 0f851df1ffff 6a1c 8d45dc 53 50 e8???????? }
            // n = 6, score = 200
            //   0f851df1ffff         | jne                 0xfffff123
            //   6a1c                 | push                0x1c
            //   8d45dc               | lea                 eax, [ebp - 0x24]
            //   53                   | push                ebx
            //   50                   | push                eax
            //   e8????????           |                     

        $sequence_1 = { 7413 807d1055 7411 6a05 56 ff15???????? }
            // n = 6, score = 200
            //   7413                 | je                  0x15
            //   807d1055             | cmp                 byte ptr [ebp + 0x10], 0x55
            //   7411                 | je                  0x13
            //   6a05                 | push                5
            //   56                   | push                esi
            //   ff15????????         |                     

        $sequence_2 = { 83c104 3bc6 72f4 3bc6 7512 83fe40 730d }
            // n = 7, score = 200
            //   83c104               | add                 ecx, 4
            //   3bc6                 | cmp                 eax, esi
            //   72f4                 | jb                  0xfffffff6
            //   3bc6                 | cmp                 eax, esi
            //   7512                 | jne                 0x14
            //   83fe40               | cmp                 esi, 0x40
            //   730d                 | jae                 0xf

        $sequence_3 = { 8bd8 66c745e00200 ff15???????? 8b35???????? }
            // n = 4, score = 200
            //   8bd8                 | mov                 ebx, eax
            //   66c745e00200         | mov                 word ptr [ebp - 0x20], 2
            //   ff15????????         |                     
            //   8b35????????         |                     

        $sequence_4 = { 8d848db8feffff 8b5004 41 8910 8b95b4feffff 83c004 4a }
            // n = 7, score = 200
            //   8d848db8feffff       | lea                 eax, [ebp + ecx*4 - 0x148]
            //   8b5004               | mov                 edx, dword ptr [eax + 4]
            //   41                   | inc                 ecx
            //   8910                 | mov                 dword ptr [eax], edx
            //   8b95b4feffff         | mov                 edx, dword ptr [ebp - 0x14c]
            //   83c004               | add                 eax, 4
            //   4a                   | dec                 edx

        $sequence_5 = { 7509 c6843d34ffffff0a 47 6a06 8d8534ffffff }
            // n = 5, score = 200
            //   7509                 | jne                 0xb
            //   c6843d34ffffff0a     | mov                 byte ptr [ebp + edi - 0xcc], 0xa
            //   47                   | inc                 edi
            //   6a06                 | push                6
            //   8d8534ffffff         | lea                 eax, [ebp - 0xcc]

        $sequence_6 = { ff75e4 ff15???????? 895de4 e9???????? 80f916 0f855f020000 8b45f0 }
            // n = 7, score = 200
            //   ff75e4               | push                dword ptr [ebp - 0x1c]
            //   ff15????????         |                     
            //   895de4               | mov                 dword ptr [ebp - 0x1c], ebx
            //   e9????????           |                     
            //   80f916               | cmp                 cl, 0x16
            //   0f855f020000         | jne                 0x265
            //   8b45f0               | mov                 eax, dword ptr [ebp - 0x10]

        $sequence_7 = { 83c40c e9???????? 68???????? bf???????? 68???????? 57 }
            // n = 6, score = 200
            //   83c40c               | add                 esp, 0xc
            //   e9????????           |                     
            //   68????????           |                     
            //   bf????????           |                     
            //   68????????           |                     
            //   57                   | push                edi

        $sequence_8 = { 8975c4 899db4feffff e8???????? 83c40c 83f8ff }
            // n = 5, score = 200
            //   8975c4               | mov                 dword ptr [ebp - 0x3c], esi
            //   899db4feffff         | mov                 dword ptr [ebp - 0x14c], ebx
            //   e8????????           |                     
            //   83c40c               | add                 esp, 0xc
            //   83f8ff               | cmp                 eax, -1

        $sequence_9 = { 83ec14 53 56 57 6a01 5e 33db }
            // n = 7, score = 200
            //   83ec14               | sub                 esp, 0x14
            //   53                   | push                ebx
            //   56                   | push                esi
            //   57                   | push                edi
            //   6a01                 | push                1
            //   5e                   | pop                 esi
            //   33db                 | xor                 ebx, ebx

    condition:
        7 of them and filesize < 335872
}