What is AppVIsvSubsystems64.dll?

AppVIsvSubsystems64.dll is part of Microsoft Application Virtualization (App-V) and developed by Microsoft Corporation according to the AppVIsvSubsystems64.dll version information.

AppVIsvSubsystems64.dll's description is "AppVIsvSubsystems64"

AppVIsvSubsystems64.dll is digitally signed by Microsoft Corporation.

AppVIsvSubsystems64.dll is usually located in the 'C:\Program Files\Microsoft Office\root\Client\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about AppVIsvSubsystems64.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 72 anti-virus programs at VirusTotal detected the AppVIsvSubsystems64.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\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll"
    ],
    "file_opened": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll",
        "C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui"
    ],
    "command_line": [
        "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll,DllMain"
    ],
    "file_exists": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll",
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll.manifest"
    ],
    "file_read": [
        "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.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\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1594263187.328125,
        "ppid": 376
    },
    {
        "process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2732,
        "summary": {
            "dll_loaded": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll"
            ],
            "file_opened": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll"
            ],
            "command_line": [
                "\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll,DllMain"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll.manifest"
            ],
            "file_read": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
            ]
        },
        "first_seen": 1594263187.59375,
        "ppid": 2892
    },
    {
        "process_path": "C:\\Windows\\System32\\rundll32.exe",
        "process_name": "rundll32.exe",
        "pid": 2500,
        "summary": {
            "file_opened": [
                "C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui"
            ],
            "file_exists": [
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll",
                "C:\\Users\\cuck\\AppData\\Local\\Temp\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.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\\d6813097543aeab1c48e34b383bb9188be513e04d8b4fa8a886d5e094890e8a1.bin.dll"
            ]
        },
        "first_seen": 1594263187.796875,
        "ppid": 2732
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "AppVIsvSubsystems64.pdb",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "has_pdb"
    },
    {
        "markcount": 3,
        "families": [],
        "description": "The executable contains unknown PE section names indicative of a packer (could be a false positive)",
        "severity": 1,
        "marks": [
            {
                "category": "section",
                "ioc": ".detourd",
                "type": "ioc",
                "description": null
            },
            {
                "category": "section",
                "ioc": ".detourc",
                "type": "ioc",
                "description": null
            },
            {
                "category": "section",
                "ioc": ".c2r",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "pe_features"
    }
]

Yara

The Yara rules did not detect anything in the file.

Network

{
    "tls": [],
    "udp": [
        {
            "src": "192.168.56.101",
            "dst": "192.168.56.255",
            "offset": 546,
            "time": 3.0710530281066895,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5578,
            "time": 3.004512071609497,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 5906,
            "time": 1.0454390048980713,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6234,
            "time": 3.016200065612793,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6562,
            "time": 1.5596919059753418,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 6890,
            "time": -0.09911990165710449,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 7218,
            "time": 1.6405298709869385,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 18164,
            "time": 1.0665459632873535,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 26548,
            "time": 3.125119924545288,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "ee125accbca8938f229d5c56ba002fc452f3c87ae19ed8a0e347594276a54c42",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "f3a4890001b209e965976602e34f1a64c578f64c1a6fdea898e01411d9691989",
    "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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