What is tapisrv.dll?

tapisrv.dll is part of Microsoft® Windows® Operating System and developed by Microsoft Corporation according to the tapisrv.dll version information.

tapisrv.dll's description is "Microsoft® Windows(TM) Telephony Server"

tapisrv.dll is digitally signed by Microsoft Windows.

tapisrv.dll is usually located in the 'C:\WINDOWS\System32\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about tapisrv.dll.

If you have additional information about the file, please share it with the FreeFixer users by posting a comment at the bottom of this page.

VirusTotal report

None of the 68 anti-virus programs at VirusTotal detected the tapisrv.dll file.

Sandbox Report

The following information was gathered by executing the file inside Cuckoo Sandbox.

Summary

Successfully executed process in sandbox.

Summary

{
    "dll_loaded": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll"
    ],
    "file_opened": [
        "C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll"
    ],
    "command_line": [
        "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll,DllMain"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll.manifest"
    ],
    "file_read": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\Windows Error Reporting\\WMR\\Disable",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
    ]
}

Generic

[
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2816,
        "summary": {
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll"
            ],
            "file_opened": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll"
            ],
            "command_line": [
                "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll,DllMain"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll.manifest"
            ],
            "file_read": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ]
        },
        "first_seen": 1574884386.640625,
        "ppid": 2016
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1574884386.34375,
        "ppid": 376
    },
    {
        "process_path": "C:\\Windows\\System32\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2588,
        "summary": {
            "file_opened": [
                "C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll.manifest"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\Windows Error Reporting\\WMR\\Disable",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ],
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\cac6cd1380ced871283022acd9eb8dd0aefe53f056c5425cca324319f388f4a5.bin.dll"
            ]
        },
        "first_seen": 1574884386.84375,
        "ppid": 2816
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "tapisrv.pdb",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "has_pdb"
    },
    {
        "markcount": 1,
        "families": [],
        "description": "The executable contains unknown PE section names indicative of a packer (could be a false positive)",
        "severity": 1,
        "marks": [
            {
                "category": "section",
                "ioc": ".didat",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "pe_features"
    },
    {
        "markcount": 1,
        "families": [],
        "description": "The file contains an unknown PE resource name possibly indicative of a packer",
        "severity": 1,
        "marks": [
            {
                "category": "resource name",
                "ioc": "MUI",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "pe_unknown_resource_name"
    }
]

Yara

[
    {
        "meta": {
            "description": "Possibly employs anti-virtualization techniques",
            "author": "nex"
        },
        "name": "vmdetect",
        "offsets": {
            "vmcheckdll": [
                [
                    149049,
                    0
                ]
            ]
        },
        "strings": [
            "RccAAQ=="
        ]
    }
]

Network

{
    "tls": [],
    "udp": [
        {
            "src": "192.168.56.101",
            "dst": "192.168.56.255",
            "offset": 546,
            "time": 3.0680220127105713,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5326,
            "time": 3.0318069458007812,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5654,
            "time": 1.0170841217041016,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5982,
            "time": 3.0435791015625,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6310,
            "time": 1.5343310832977295,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6638,
            "time": -0.08809494972229004,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 6966,
            "time": 1.5470640659332275,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 17912,
            "time": 1.0481491088867188,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 26296,
            "time": 3.09879994392395,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "bcbe451f4672708834a42eb1aaf725fd583601105769b600efcb5f2bc837acaf",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "fdf508c9f988870f8c1bb8bf306f7be171e8261a57cbba65c2b9e43d4aa43fcf",
    "irc": [],
    "https_ex": []
}

Screenshots

Malware or legitimate?

If you feel that you need more information to determine if your should keep this file or remove it, please read this guide.

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