What is 01271bde222a980cd57a0afe7f8f3f6a05f1fa52?

01271bde222a980cd57a0afe7f8f3f6a05f1fa52 is part of Microsoft Malware Protection and developed by Microsoft Corporation according to the 01271bde222a980cd57a0afe7f8f3f6a05f1fa52 version information.

01271bde222a980cd57a0afe7f8f3f6a05f1fa52's description is "Microsoft Antimalware WU Stub"

01271bde222a980cd57a0afe7f8f3f6a05f1fa52 is digitally signed by Microsoft Corporation.

01271bde222a980cd57a0afe7f8f3f6a05f1fa52 is usually located in the 'c:\Windows\SoftwareDistribution\Download\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about 01271bde222a980cd57a0afe7f8f3f6a05f1fa52.

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 71 anti-virus programs at VirusTotal detected the 01271bde222a980cd57a0afe7f8f3f6a05f1fa52 file.

Sandbox Report

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

Summary

Successfully executed process in sandbox.

Summary

{
    "file_opened": [
        "C:\\Windows\\System32\\MpSigStub.exe"
    ],
    "file_exists": [
        "C:\\Windows\\System32\\advapi32.dll",
        "C:\\Windows\\System32\\version.dll"
    ],
    "regkey_opened": [
        "HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows Defender\\MpEngine",
        "HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Microsoft Antimalware\\MpEngine",
        "HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows Defender\\Features",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\MpSigStub"
    ],
    "regkey_written": [
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\MpSigStub\\LastStartTime",
        "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\MpSigStub\\LastExitCode"
    ],
    "dll_loaded": [
        "kernel32",
        "C:\\Windows\\system32\\advapi32.dll",
        "C:\\Windows\\system32\\version.dll"
    ]
}

Generic

[
    {
        "process_path": "C:\\Users\\cuck\\AppData\\Local\\Temp\\7aed0b20d597c4e8fd3513a5814c3f700ffd0424cb31756a13cb25c5c76d7a3d.bin",
        "process_name": "7aed0b20d597c4e8fd3513a5814c3f700ffd0424cb31756a13cb25c5c76d7a3d.bin",
        "pid": 2816,
        "summary": {
            "file_opened": [
                "C:\\Windows\\System32\\MpSigStub.exe"
            ],
            "file_exists": [
                "C:\\Windows\\System32\\advapi32.dll",
                "C:\\Windows\\System32\\version.dll"
            ],
            "regkey_opened": [
                "HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows Defender\\MpEngine",
                "HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Microsoft Antimalware\\MpEngine",
                "HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Windows Defender\\Features",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\MpSigStub"
            ],
            "regkey_written": [
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\MpSigStub\\LastStartTime",
                "HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\MpSigStub\\LastExitCode"
            ],
            "dll_loaded": [
                "kernel32",
                "C:\\Windows\\system32\\advapi32.dll",
                "C:\\Windows\\system32\\version.dll"
            ]
        },
        "first_seen": 1588564386.577875,
        "ppid": 1564
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1588564386.328125,
        "ppid": 376
    }
]

Signatures

[
    {
        "markcount": 1,
        "families": [],
        "description": "This executable has a PDB path",
        "severity": 1,
        "marks": [
            {
                "category": "pdb_path",
                "ioc": "MpWUStub.pdb",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "has_pdb"
    },
    {
        "markcount": 2,
        "families": [],
        "description": "The file contains an unknown PE resource name possibly indicative of a packer",
        "severity": 1,
        "marks": [
            {
                "category": "resource name",
                "ioc": "BINARY",
                "type": "ioc",
                "description": null
            },
            {
                "category": "resource name",
                "ioc": "CABINET",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "pe_unknown_resource_name"
    },
    {
        "markcount": 2,
        "families": [],
        "description": "The binary likely contains encrypted or compressed data indicative of a packer",
        "severity": 2,
        "marks": [
            {
                "entropy": 7.997774757979181,
                "section": {
                    "size_of_data": "0x000dfe00",
                    "virtual_address": "0x0003c000",
                    "entropy": 7.997774757979181,
                    "name": ".rsrc",
                    "virtual_size": "0x000dfc40"
                },
                "type": "generic",
                "description": "A section with a high entropy has been found"
            },
            {
                "entropy": 0.8002680965147453,
                "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": 1,
        "families": [],
        "description": "Expresses interest in specific running processes",
        "severity": 2,
        "marks": [
            {
                "category": "process",
                "ioc": "7aed0b20d597c4e8fd3513a5814c3f700ffd0424cb31756a13cb25c5c76d7a3d.bin",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "process_interest"
    },
    {
        "markcount": 1,
        "families": [],
        "description": "Attempts to identify installed AV products by registry key",
        "severity": 3,
        "marks": [
            {
                "category": "registry",
                "ioc": "HKEY_LOCAL_MACHINE\\Software\\Microsoft\\Microsoft Antimalware\\MpEngine",
                "type": "ioc",
                "description": null
            }
        ],
        "references": [],
        "name": "antiav_detectreg"
    }
]

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": 3.137557029724121,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 2018,
            "time": 3.066843032836914,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 2346,
            "time": 1.0780110359191895,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 2674,
            "time": 3.0789718627929688,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 3002,
            "time": 1.57902193069458,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 3330,
            "time": -0.03975200653076172,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 3658,
            "time": 1.5909309387207031,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 6986,
            "time": 1.0920019149780273,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 11178,
            "time": 3.199445962905884,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "f35cded1fd0c32cfd468bd077f4ca9e96ceed4d2878f03cc4faa44c7de26210e",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "e89021d6f452749e77f548ee094f4ed8a7d5879878a7ec8149d16d431d59aaca",
    "irc": [],
    "https_ex": []
}

Screenshots

Malware or legitimate?

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