rule win_mozart_auto {

    meta:
        author = "Felix Bilstein - yara-signator at cocacoding dot com"
        date = "2026-05-04"
        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 = "20260422"
        malpedia_hash = "a182e35da64e6d71cb55f125c4d4225196523f14"
        malpedia_version = "20260504"
        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 = { 7471 57 8b15???????? a1???????? }
            // n = 4, score = 200
            //   7471                 | je                  0x73
            //   57                   | push                edi
            //   8b15????????         |                     
            //   a1????????           |                     

        $sequence_1 = { 8bc7 2bc6 50 51 56 }
            // n = 5, score = 200
            //   8bc7                 | mov                 eax, edi
            //   2bc6                 | sub                 eax, esi
            //   50                   | push                eax
            //   51                   | push                ecx
            //   56                   | push                esi

        $sequence_2 = { c3 ff15???????? 33d2 3d14050000 0f95c2 4a 83e204 }
            // n = 7, score = 200
            //   c3                   | ret                 
            //   ff15????????         |                     
            //   33d2                 | xor                 edx, edx
            //   3d14050000           | cmp                 eax, 0x514
            //   0f95c2               | setne               dl
            //   4a                   | dec                 edx
            //   83e204               | and                 edx, 4

        $sequence_3 = { f6c410 741a 8b542420 8b0a 45 3be9 760a }
            // n = 7, score = 200
            //   f6c410               | test                ah, 0x10
            //   741a                 | je                  0x1c
            //   8b542420             | mov                 edx, dword ptr [esp + 0x20]
            //   8b0a                 | mov                 ecx, dword ptr [edx]
            //   45                   | inc                 ebp
            //   3be9                 | cmp                 ebp, ecx
            //   760a                 | jbe                 0xc

        $sequence_4 = { 3bca 736e 8bd0 c1ea0c 83e23f }
            // n = 5, score = 200
            //   3bca                 | cmp                 ecx, edx
            //   736e                 | jae                 0x70
            //   8bd0                 | mov                 edx, eax
            //   c1ea0c               | shr                 edx, 0xc
            //   83e23f               | and                 edx, 0x3f

        $sequence_5 = { 8d3c85c0db4000 8b07 83e61f c1e603 }
            // n = 4, score = 200
            //   8d3c85c0db4000       | lea                 edi, [eax*4 + 0x40dbc0]
            //   8b07                 | mov                 eax, dword ptr [edi]
            //   83e61f               | and                 esi, 0x1f
            //   c1e603               | shl                 esi, 3

        $sequence_6 = { 8bd9 33d2 85db 7c12 8d0495f8c84000 }
            // n = 5, score = 200
            //   8bd9                 | mov                 ebx, ecx
            //   33d2                 | xor                 edx, edx
            //   85db                 | test                ebx, ebx
            //   7c12                 | jl                  0x14
            //   8d0495f8c84000       | lea                 eax, [edx*4 + 0x40c8f8]

        $sequence_7 = { 84c0 7546 8d942418010000 52 56 e8???????? }
            // n = 6, score = 200
            //   84c0                 | test                al, al
            //   7546                 | jne                 0x48
            //   8d942418010000       | lea                 edx, [esp + 0x118]
            //   52                   | push                edx
            //   56                   | push                esi
            //   e8????????           |                     

        $sequence_8 = { 50 6a01 ffd6 8b35???????? 50 ffd6 8b4c2408 }
            // n = 7, score = 200
            //   50                   | push                eax
            //   6a01                 | push                1
            //   ffd6                 | call                esi
            //   8b35????????         |                     
            //   50                   | push                eax
            //   ffd6                 | call                esi
            //   8b4c2408             | mov                 ecx, dword ptr [esp + 8]

        $sequence_9 = { 83c408 5d c20400 833d????????02 750d }
            // n = 5, score = 200
            //   83c408               | add                 esp, 8
            //   5d                   | pop                 ebp
            //   c20400               | ret                 4
            //   833d????????02       |                     
            //   750d                 | jne                 0xf

    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*)
}