What is TesSafe.sys?

TesSafe.sys is part of Loader64 and developed by TENCENT according to the TesSafe.sys version information.

TesSafe.sys's description is "Loader64 NT Driver"

TesSafe.sys is digitally signed by Tencent Technology(Shenzhen) Company Limited.

TesSafe.sys is usually located in the 'c:\Windows\System32\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about TesSafe.sys.

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 73 anti-virus programs at VirusTotal detected the TesSafe.sys file.

Sandbox Report

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

Summary

ERROR: Failed to execute process.

Generic

[
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1581907985.3125,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "c:\\jenkins\\workspace\\unisafe-branches\\Bin\\amd64\\Loader64.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": "INIT",
                "type": "ioc",
                "description": null
            },
            {
                "category": "section",
                "ioc": ".vmp0",
                "type": "ioc",
                "description": null
            },
            {
                "category": "section",
                "ioc": ".vmp1",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "pe_features"
    },
    {
        "markcount": 1,
        "families": [],
        "description": "Foreign language identified in PE resource",
        "severity": 2,
        "marks": [
            {
                "name": "RT_VERSION",
                "language": "LANG_CHINESE",
                "offset": "0x00025058",
                "filetype": "COM executable for DOS",
                "sublanguage": "SUBLANG_CHINESE_SIMPLIFIED",
                "type": "generic",
                "size": "0x000003b8"
            }
        ],
        "references": [],
        "name": "origin_langid"
    },
    {
        "markcount": 3,
        "families": [],
        "description": "The binary likely contains encrypted or compressed data indicative of a packer",
        "severity": 2,
        "marks": [
            {
                "entropy": 7.00288395256368,
                "section": {
                    "size_of_data": "0x0001d000",
                    "virtual_address": "0x00001000",
                    "entropy": 7.00288395256368,
                    "name": ".text",
                    "virtual_size": "0x0001ce56"
                },
                "type": "generic",
                "description": "A section with a high entropy has been found"
            },
            {
                "entropy": 6.835503861721917,
                "section": {
                    "size_of_data": "0x0005d600",
                    "virtual_address": "0x00027000",
                    "entropy": 6.835503861721917,
                    "name": ".vmp1",
                    "virtual_size": "0x0005d4fe"
                },
                "type": "generic",
                "description": "A section with a high entropy has been found"
            },
            {
                "entropy": 0.9635826771653543,
                "type": "generic",
                "description": "Overall entropy of this PE file is high"
            }
        ],
        "references": [
            "http:\/\/www.forensickb.com\/2013\/03\/file-entropy-explained.html",
            "http:\/\/virii.es\/U\/Using%20Entropy%20Analysis%20to%20Find%20Encrypted%20and%20Packed%20Malware.pdf"
        ],
        "name": "packer_entropy"
    },
    {
        "markcount": 2,
        "families": [],
        "description": "The executable is likely packed with VMProtect",
        "severity": 2,
        "marks": [
            {
                "section": ".vmp0",
                "type": "generic",
                "description": "Section name indicates VMProtect"
            },
            {
                "section": ".vmp1",
                "type": "generic",
                "description": "Section name indicates VMProtect"
            }
        ],
        "references": [],
        "name": "packer_vmprotect"
    }
]

Yara

The Yara rules did not detect anything in the file.

Network

{
    "tls": [],
    "udp": [
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 826,
            "time": 4.133012771606445,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 1154,
            "time": 3.0296177864074707,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 1482,
            "time": 4.154176950454712,
            "dport": 3702,
            "sport": 49152
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "313ac30ef9fb0c7c6a6f0b50ae343f8ae183c1b02fde28f17efeac0c5b678302",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "dfdf5afe463835ceefec162fc198bcf34a9e1668ac906d6c9c5f1ae034ef177d",
    "irc": [],
    "https_ex": []
}

Folder name variants

TesSafe.sys may also be located in other folders than c:\Windows\System32\. The most common variants are listed below:

• c:\Program Files\txgameassistant\ui\

What did other users do?

The poll result listed below shows what users chose to do with TesSafe.sys. 93% have voted for removal. Based on votes from 42 users.

NOTE: Please do not use this poll as the only source of input to determine what you will do with TesSafe.sys.

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.

And now some shameless self promotion ;)

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