rule win_mozart_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2023-07-11"
        version = "1"
        description = "Detects win.mozart."
        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.mozart"
        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 = { 33f6 c644241800 eb26 8d4c2418 51 }
            // n = 5, score = 200
            //   33f6                 | xor                 esi, esi
            //   c644241800           | mov                 byte ptr [esp + 0x18], 0
            //   eb26                 | jmp                 0x28
            //   8d4c2418             | lea                 ecx, [esp + 0x18]
            //   51                   | push                ecx

        $sequence_1 = { 6a02 6810010000 6a00 52 50 56 }
            // n = 6, score = 200
            //   6a02                 | push                2
            //   6810010000           | push                0x110
            //   6a00                 | push                0
            //   52                   | push                edx
            //   50                   | push                eax
            //   56                   | push                esi

        $sequence_2 = { e8???????? 81c404040000 c3 55 e8???????? 8b8c2414040000 83c404 }
            // n = 7, score = 200
            //   e8????????           |                     
            //   81c404040000         | add                 esp, 0x404
            //   c3                   | ret                 
            //   55                   | push                ebp
            //   e8????????           |                     
            //   8b8c2414040000       | mov                 ecx, dword ptr [esp + 0x414]
            //   83c404               | add                 esp, 4

        $sequence_3 = { 8d442410 50 ffd3 a1???????? }
            // n = 4, score = 200
            //   8d442410             | lea                 eax, [esp + 0x10]
            //   50                   | push                eax
            //   ffd3                 | call                ebx
            //   a1????????           |                     

        $sequence_4 = { 7509 b803000000 83c420 c3 ff15???????? 33d2 3d14050000 }
            // n = 7, score = 200
            //   7509                 | jne                 0xb
            //   b803000000           | mov                 eax, 3
            //   83c420               | add                 esp, 0x20
            //   c3                   | ret                 
            //   ff15????????         |                     
            //   33d2                 | xor                 edx, edx
            //   3d14050000           | cmp                 eax, 0x514

        $sequence_5 = { 393cb5f8c84000 7403 4e 79f4 85f6 }
            // n = 5, score = 200
            //   393cb5f8c84000       | cmp                 dword ptr [esi*4 + 0x40c8f8], edi
            //   7403                 | je                  5
            //   4e                   | dec                 esi
            //   79f4                 | jns                 0xfffffff6
            //   85f6                 | test                esi, esi

        $sequence_6 = { a3???????? ff15???????? c3 8b15???????? 68???????? }
            // n = 5, score = 200
            //   a3????????           |                     
            //   ff15????????         |                     
            //   c3                   | ret                 
            //   8b15????????         |                     
            //   68????????           |                     

        $sequence_7 = { eb13 8b15???????? a0???????? 89542410 88442414 8b5508 }
            // n = 6, score = 200
            //   eb13                 | jmp                 0x15
            //   8b15????????         |                     
            //   a0????????           |                     
            //   89542410             | mov                 dword ptr [esp + 0x10], edx
            //   88442414             | mov                 byte ptr [esp + 0x14], al
            //   8b5508               | mov                 edx, dword ptr [ebp + 8]

        $sequence_8 = { 33ff 33ed 85c9 8944240c 0f863e020000 }
            // n = 5, score = 200
            //   33ff                 | xor                 edi, edi
            //   33ed                 | xor                 ebp, ebp
            //   85c9                 | test                ecx, ecx
            //   8944240c             | mov                 dword ptr [esp + 0xc], eax
            //   0f863e020000         | jbe                 0x244

        $sequence_9 = { 8d048538b54000 3bc8 7304 3911 7402 }
            // n = 5, score = 200
            //   8d048538b54000       | lea                 eax, [eax*4 + 0x40b538]
            //   3bc8                 | cmp                 ecx, eax
            //   7304                 | jae                 6
            //   3911                 | cmp                 dword ptr [ecx], edx
            //   7402                 | je                  4

    condition:
        7 of them and filesize < 114688
}

rule win_mozart_w0 {
    meta:
        author = "Nick Hoffman"
        description = "Detects samples of the Mozart POS RAM scraping utility"
        malpedia_reference = "https://malpedia.caad.fkie.fraunhofer.de/details/win.mozart"
        malpedia_version = "20180125"
        malpedia_license = "CC BY-NC-SA 4.0"
        malpedia_sharing = "TLP:WHITE"
    strings:
        $pdb = "z:\\Slender\\mozart\\mozart\\Release\\mozart.pdb" nocase wide ascii
        $output = {67 61 72 62 61 67 65 2E 74 6D 70 00}
        $service_name = "NCR SelfServ Platform Remote Monitor" nocase wide ascii
        $service_name_short = "NCR_RemoteMonitor"
        $encode_data = {B8 08 10 00 00 E8 ?? ?? ?? ?? A1 ?? ?? ?? ?? 53 55 8B AC 24 14 10 00 00 89 84 24 0C 10 00 00 56 8B C5 33 F6 33 DB 8D 50 01 8D A4 24 00 00 00 00 8A 08 40 84 C9 ?? ?? 2B C2 89 44 24 0C ?? ?? 8B 94 24 1C 10 00 00 57 8B FD 2B FA 89 7C 24 10 ?? ?? 8B 7C 24 10 8A 04 17 02 86 E0 BA 40 00 88 02 B8 ?? ?? ?? ?? 46 8D 78 01 8D A4 24 00 00 00 00 8A 08 40 84 C9 ?? ?? 2B C7 3B F0 ?? ?? 33 F6 8B C5 43 42 8D 78 01 8A 08 40 84 C9 ?? ?? 2B C7 3B D8 ?? ?? 5F 8B B4 24 1C 10 00 00 8B C5 C6 04 33 00 8D 50 01 8A 08 40 84 C9 ?? ?? 8B 8C 24 20 10 00 00 2B C2 51 8D 54 24 14 52 50 56 E8 ?? ?? ?? ?? 83 C4 10 8B D6 5E 8D 44 24 0C 8B C8 5D 2B D1 5B 8A 08 88 0C 02 40 84 C9 ?? ?? 8B 8C 24 04 10 00 00 E8 ?? ?? ?? ?? 81 C4 08 10 00 00}
    condition:
        any of ($pdb, $output, $encode_data) or
        all of ($service*)
}