rule win_newbounce_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-03-28"
        version = "1"
        description = "Detects win.newbounce."
        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.newbounce"
        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 = { 83e00f 7e05 2bf0 83c610 }
            // n = 4, score = 300
            //   83e00f               | and                 eax, 0xf
            //   7e05                 | jle                 7
            //   2bf0                 | sub                 esi, eax
            //   83c610               | add                 esi, 0x10

        $sequence_1 = { 759a 4c8903 488bc3 488b5c2438 4883c420 }
            // n = 5, score = 200
            //   759a                 | jne                 0xffffff9c
            //   4c8903               | dec                 esp
            //   488bc3               | mov                 dword ptr [ebx], eax
            //   488b5c2438           | dec                 eax
            //   4883c420             | mov                 eax, ebx

        $sequence_2 = { ff15???????? 85c0 0f841f010000 eb17 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   85c0                 | dec                 esp
            //   0f841f010000         | mov                 dword ptr [ebp + 7], esp
            //   eb17                 | inc                 ebp

        $sequence_3 = { ff15???????? 85c0 0f844b010000 ba28000000 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   85c0                 | mov                 ecx, dword ptr [esp + 0x28]
            //   0f844b010000         | test                eax, eax
            //   ba28000000           | je                  0x23d

        $sequence_4 = { ff15???????? 85c0 0f8437020000 8b4c2428 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   85c0                 | dec                 eax
            //   0f8437020000         | mov                 dword ptr [esp + 0x128], edi
            //   8b4c2428             | mov                 dword ptr [esp + 0x120], 0x22

        $sequence_5 = { ff15???????? 85c0 0f8408020000 4c896507 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   85c0                 | mov                 eax, ebx
            //   0f8408020000         | jmp                 6
            //   4c896507             | xor                 eax, eax

        $sequence_6 = { ff15???????? 85c0 0f8436020000 4889bc2428010000 }
            // n = 4, score = 200
            //   ff15????????         |                     
            //   85c0                 | mov                 eax, dword ptr [ebx + 0x204]
            //   0f8436020000         | test                eax, eax
            //   4889bc2428010000     | je                  0x125

        $sequence_7 = { ffd0 85c0 0f99c3 8bc3 eb02 33c0 488b5c2430 }
            // n = 7, score = 200
            //   ffd0                 | dec                 eax
            //   85c0                 | mov                 ebx, dword ptr [esp + 0x38]
            //   0f99c3               | dec                 eax
            //   8bc3                 | add                 esp, 0x20
            //   eb02                 | call                eax
            //   33c0                 | test                eax, eax
            //   488b5c2430           | setns               bl

        $sequence_8 = { 81e1ff000000 337c2424 8b0c8d48536300 333c95485f6300 }
            // n = 4, score = 100
            //   81e1ff000000         | and                 ecx, 0xff
            //   337c2424             | xor                 eax, dword ptr [esp + 0x2c]
            //   8b0c8d48536300       | mov                 ecx, dword ptr [ecx*4 + 0x635748]
            //   333c95485f6300       | xor                 eax, ecx

        $sequence_9 = { 81e1ff000000 33048d48576300 8b3cbd48536300 3304b5485f6300 }
            // n = 4, score = 100
            //   81e1ff000000         | lea                 edi, [edx + 0x18]
            //   33048d48576300       | mov                 ecx, edi
            //   8b3cbd48536300       | test                eax, eax
            //   3304b5485f6300       | je                  0xffffff73

        $sequence_10 = { 81e1ff000000 83f901 0f8507010000 8b4004 }
            // n = 4, score = 100
            //   81e1ff000000         | mov                 ecx, dword ptr [ecx*4 + 0x635348]
            //   83f901               | xor                 edi, dword ptr [edx*4 + 0x635f48]
            //   0f8507010000         | and                 ecx, 0xff
            //   8b4004               | xor                 edi, dword ptr [esp + 0x24]

        $sequence_11 = { 81e1ff000000 330495485f6300 8b0c8d485b6300 33c1 }
            // n = 4, score = 100
            //   81e1ff000000         | and                 edx, 0xff
            //   330495485f6300       | xor                 eax, dword ptr [esp + 0x2c]
            //   8b0c8d485b6300       | and                 ecx, 0xff
            //   33c1                 | xor                 eax, dword ptr [ecx*4 + 0x635b48]

        $sequence_12 = { 81e1ff000000 3354241c 33542424 33542448 899424d4000000 8b148d48576300 }
            // n = 6, score = 100
            //   81e1ff000000         | mov                 ecx, dword ptr [ecx*4 + 0x635748]
            //   3354241c             | xor                 eax, ecx
            //   33542424             | and                 ecx, 0xff
            //   33542448             | xor                 eax, dword ptr [esp + 0x2c]
            //   899424d4000000       | mov                 ecx, dword ptr [ecx*4 + 0x635748]
            //   8b148d48576300       | xor                 eax, ecx

        $sequence_13 = { 81e1ff000000 3344242c 8b0c8d48576300 33c1 }
            // n = 4, score = 100
            //   81e1ff000000         | mov                 ecx, dword ptr [ecx*4 + 0x635b48]
            //   3344242c             | xor                 eax, ecx
            //   8b0c8d48576300       | and                 ecx, 0xff
            //   33c1                 | xor                 eax, dword ptr [edx*4 + 0x635f48]

        $sequence_14 = { 81e1ff000000 33048d485b6300 81e2ff000000 3344242c }
            // n = 4, score = 100
            //   81e1ff000000         | mov                 edi, dword ptr [edi*4 + 0x635348]
            //   33048d485b6300       | xor                 eax, dword ptr [esi*4 + 0x635f48]
            //   81e2ff000000         | and                 ecx, 0xff
            //   3344242c             | xor                 eax, dword ptr [ecx*4 + 0x635748]

    condition:
        7 of them and filesize < 8637440
}