What is fshoster64.exe?

fshoster64.exe is part of F-Secure OneClient and developed by F-Secure Corporation according to the fshoster64.exe version information.

fshoster64.exe's description is "F-Secure Host Process"

fshoster64.exe is digitally signed by F-Secure Corporation.

fshoster64.exe is usually located in the 'C:\Program Files (x86)\Safe Online\Ultralight\ulcore\1576069576\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about fshoster64.exe.

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.

Vendor and version information [?]

The following is the available information on fshoster64.exe:

PropertyValue
Product nameF-Secure OneClient
Company nameF-Secure Corporation
File descriptionF-Secure Host Process
Internal namefshoster
Original filenamefshoster.exe
Legal copyright© F-Secure Corporation. All rights reserved.
Product version1.51.4.0
File version1.51.4.0

Here's a screenshot of the file properties when displayed by Windows Explorer:

Product nameF-Secure OneClient
Company nameF-Secure Corporation
File descriptionF-Secure Host Process
Internal namefshoster
Original filenamefshoster.exe
Legal copyright© F-Secure Corporation. All rights ..
Product version1.51.4.0
File version1.51.4.0

Digital signatures [?]

fshoster64.exe has a valid digital signature.

PropertyValue
Signer nameF-Secure Corporation
Certificate issuer nameDigiCert Assured ID Code Signing CA-1
Certificate serial number05a063e8d88ee16558585ab15cb97ec6

VirusTotal report

None of the 73 anti-virus programs at VirusTotal detected the fshoster64.exe file.

None of the 73 anti-virus programs detected the fshoster64.exe file.

Sandbox Report

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

Summary

Successfully executed process in sandbox.

Summary

{
    "file_created": [
        "C:\\ProgramData\\F-Secure\\Log\\CCF\\Hoster64.log"
    ],
    "directory_created": [
        "C:\\ProgramData\\F-Secure\\Log\\CCF",
        "C:\\ProgramData\\F-Secure",
        "C:\\ProgramData\\F-Secure\\Log"
    ],
    "dll_loaded": [
        "kernel32",
        "rpcrt4.dll",
        "api-ms-win-core-localization-l1-2-1",
        "api-ms-win-core-fibers-l1-1-1",
        "api-ms-win-core-synch-l1-2-0"
    ],
    "regkey_opened": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\F-Secure\\CCF\\Logging",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\F-Secure\\CCF\\Logging\\CCF",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\F-Secure\\CCF\\Logging\\CCF\\Hoster64"
    ],
    "file_written": [
        "C:\\ProgramData\\F-Secure\\Log\\CCF\\Hoster64.log"
    ],
    "file_exists": [
        "C:\\ProgramData\\F-Secure\\Log\\CCF",
        "C:\\ProgramData\\F-Secure",
        "C:\\ProgramData\\F-Secure\\Log",
        "C:\\ProgramData"
    ],
    "mutex": [
        "Global\\FsCcfLogging_C:_ProgramData_F-Secure_Log_CCF_Hoster64"
    ],
    "regkey_read": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders\\Common AppData",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Rpc\\MaxRpcSize",
        "HKEY_LOCAL_MACHINE\\SYSTEM\\Setup\\SystemSetupInProgress",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\SQMClient\\Windows\\CEIPEnable",
        "HKEY_LOCAL_MACHINE\\SYSTEM\\Setup\\OOBEInProgress",
        "HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\ComputerName\\ActiveComputerName\\ComputerName"
    ]
}

Dropped

[
    {
        "yara": [],
        "sha1": "ff979578f8002da71f456c8bca313d8f004dba55",
        "name": "2d05ab6638db52bc_hoster64.log",
        "filepath": "C:\\ProgramData\\F-Secure\\Log\\CCF\\Hoster64.log",
        "type": "ASCII text, with CRLF line terminators",
        "sha256": "2d05ab6638db52bcfb6e77aa273976ca01e0f7344c8913690c89866791f470c1",
        "urls": [],
        "crc32": "DE7D6D0F",
        "path": "\/home\/hpuser\/.cuckoo\/storage\/analyses\/4860\/files\/2d05ab6638db52bc_hoster64.log",
        "ssdeep": null,
        "size": 276,
        "sha512": "654872cad16a7f48a9f3121790b3aa2ee092c1f9d1ec8d8dcb7ff776cb663551bb90d54eebc66c47beb70b8538c94964143d108b1213b5b0e539f16e1f9012a9",
        "pids": [
            2420
        ],
        "md5": "30dcc175305a41ce4860cca6d2fb414d"
    }
]

Generic

[
    {
        "process_path": "C:\\Users\\cuck\\AppData\\Local\\Temp\\6f88866ae32b3a4a3d4e9901249f535a567e1d6d552da3133ad8dffe434ed5e2.bin",
        "process_name": "6f88866ae32b3a4a3d4e9901249f535a567e1d6d552da3133ad8dffe434ed5e2.bin",
        "pid": 2420,
        "summary": {
            "file_created": [
                "C:\\ProgramData\\F-Secure\\Log\\CCF\\Hoster64.log"
            ],
            "directory_created": [
                "C:\\ProgramData\\F-Secure\\Log\\CCF",
                "C:\\ProgramData\\F-Secure",
                "C:\\ProgramData\\F-Secure\\Log"
            ],
            "dll_loaded": [
                "kernel32",
                "rpcrt4.dll",
                "api-ms-win-core-localization-l1-2-1",
                "api-ms-win-core-fibers-l1-1-1",
                "api-ms-win-core-synch-l1-2-0"
            ],
            "regkey_opened": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\F-Secure\\CCF\\Logging",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\F-Secure\\CCF\\Logging\\CCF",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\F-Secure\\CCF\\Logging\\CCF\\Hoster64"
            ],
            "file_written": [
                "C:\\ProgramData\\F-Secure\\Log\\CCF\\Hoster64.log"
            ],
            "file_exists": [
                "C:\\ProgramData\\F-Secure\\Log\\CCF",
                "C:\\ProgramData\\F-Secure",
                "C:\\ProgramData\\F-Secure\\Log",
                "C:\\ProgramData"
            ],
            "mutex": [
                "Global\\FsCcfLogging_C:_ProgramData_F-Secure_Log_CCF_Hoster64"
            ],
            "regkey_read": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders\\Common AppData",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Rpc\\MaxRpcSize",
                "HKEY_LOCAL_MACHINE\\SYSTEM\\Setup\\SystemSetupInProgress",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\SQMClient\\Windows\\CEIPEnable",
                "HKEY_LOCAL_MACHINE\\SYSTEM\\Setup\\OOBEInProgress",
                "HKEY_LOCAL_MACHINE\\SYSTEM\\ControlSet001\\Control\\ComputerName\\ActiveComputerName\\ComputerName"
            ]
        },
        "first_seen": 1578473585.578125,
        "ppid": 2448
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1578473585.328125,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "D:\\hudsonwork\\workspace\\OneClient\\ccf_hosting\\output\\bin\\fshoster64s.pdb",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "has_pdb"
    },
    {
        "markcount": 1,
        "families": [],
        "description": "Checks amount of memory in system, this can be used to detect virtual machines that have a low amount of memory available",
        "severity": 1,
        "marks": [
            {
                "call": {
                    "category": "system",
                    "status": 1,
                    "stacktrace": [],
                    "api": "GlobalMemoryStatusEx",
                    "return_value": 1,
                    "arguments": {},
                    "time": 1578473156.206396,
                    "tid": 2460,
                    "flags": {}
                },
                "pid": 2420,
                "type": "call",
                "cid": 87
            }
        ],
        "references": [],
        "name": "antivm_memory_available"
    },
    {
        "markcount": 4,
        "families": [],
        "description": "Attempts to identify installed AV products by installation directory",
        "severity": 3,
        "marks": [
            {
                "category": "file",
                "ioc": "C:\\ProgramData\\F-Secure\\Log\\CCF\\Hoster64.log",
                "type": "ioc",
                "description": null
            },
            {
                "category": "file",
                "ioc": "C:\\ProgramData\\F-Secure\\Log\\CCF",
                "type": "ioc",
                "description": null
            },
            {
                "category": "file",
                "ioc": "C:\\ProgramData\\F-Secure",
                "type": "ioc",
                "description": null
            },
            {
                "category": "file",
                "ioc": "C:\\ProgramData\\F-Secure\\Log",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "antiav_detectfile"
    }
]

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": 662,
            "time": 6.237515926361084,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "192.168.56.255",
            "offset": 5342,
            "time": 12.313349962234497,
            "dport": 138,
            "sport": 138
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 7186,
            "time": 6.144073963165283,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 7514,
            "time": 4.147073984146118,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 7842,
            "time": 6.189575910568237,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 8170,
            "time": 4.646134853363037,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 8498,
            "time": 3.037874937057495,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 8826,
            "time": 4.673108816146851,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 28236,
            "time": 4.1806488037109375,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 36620,
            "time": 6.238564968109131,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "b00586dd1b546e73be0ba88e8ac645f168537f47f5e769a19b862e3e423c5b6d",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "f82771d537c956fb62fcdc167b2138832656c1bcd250c9c5f711d4c300da6154",
    "irc": [],
    "https_ex": []
}

Screenshots

Screenshot from the sandboxScreenshot from the sandboxScreenshot from the sandboxScreenshot from the sandboxScreenshot from the sandbox

Other files also named fshoster64.exe

fshoster64.exe (5 votes)

Hashes [?]

PropertyValue
MD55df552baa56beb0d0f4a034b07da6880
SHA2566f88866ae32b3a4a3d4e9901249f535a567e1d6d552da3133ad8dffe434ed5e2

Error Messages

These are some of the error messages that can appear related to fshoster64.exe:

fshoster64.exe has encountered a problem and needs to close. We are sorry for the inconvenience.

fshoster64.exe - Application Error. The instruction at "0xXXXXXXXX" referenced memory at "0xXXXXXXXX". The memory could not be "read/written". Click on OK to terminate the program.

F-Secure Host Process has stopped working.

End Program - fshoster64.exe. This program is not responding.

fshoster64.exe is not a valid Win32 application.

fshoster64.exe - Application Error. The application failed to initialize properly (0xXXXXXXXX). Click OK to terminate the application.

What will you do with fshoster64.exe?

To help other users, please let us know what you will do with fshoster64.exe:



What did other users do?

The poll result listed below shows what users chose to do with fshoster64.exe. 100% have voted for removal. Based on votes from 1 user.

Votes
Keep0 %
0
Remove100 %
1

NOTE: Please do not use this poll as the only source of input to determine what you will do with fshoster64.exe. Only 1 user has voted so far so it does not offer a high degree of confidence.

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.

Please select the option that best describe your thoughts on the information provided on this web page


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Comments

Please share with the other users what you think about this file. What does this file do? Is it legitimate or something that your computer is better without? Do you know how it was installed on your system? Did you install it yourself or did it come bundled with some other software? Is it running smoothly or do you get some error message? Any information that will help to document this file is welcome. Thank you for your contributions.

I'm reading all new comments so don't hesitate to post a question about the file. If I don't have the answer perhaps another user can help you.

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