What is 48946a263b4fd20ba40bb7324c118f6f471e307a?

48946a263b4fd20ba40bb7324c118f6f471e307a is part of Microsoft Malware Protection and developed by Microsoft Corporation according to the 48946a263b4fd20ba40bb7324c118f6f471e307a version information.

48946a263b4fd20ba40bb7324c118f6f471e307a's description is "Microsoft Antimalware WU Stub"

48946a263b4fd20ba40bb7324c118f6f471e307a is digitally signed by Microsoft Corporation.

48946a263b4fd20ba40bb7324c118f6f471e307a is usually located in the 'c:\Windows\SoftwareDistribution\Download\' folder.

None of the anti-virus scanners at VirusTotal reports anything malicious about 48946a263b4fd20ba40bb7324c118f6f471e307a.

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 70 anti-virus programs at VirusTotal detected the 48946a263b4fd20ba40bb7324c118f6f471e307a 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\\6a45e31157f9984a7ed597a673651b213dff64a5ce517c4a12c4697c45f5c70a.bin",
        "process_name": "6a45e31157f9984a7ed597a673651b213dff64a5ce517c4a12c4697c45f5c70a.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": 1571784785.6719,
        "ppid": 2448
    },
    {
        "process_path": "C:\\Windows\\System32\\lsass.exe",
        "process_name": "lsass.exe",
        "pid": 476,
        "summary": {},
        "first_seen": 1571784785.4375,
        "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": 7.9979809628399,
                "section": {
                    "size_of_data": "0x000d2000",
                    "virtual_address": "0x0003c000",
                    "entropy": 7.9979809628399,
                    "name": ".rsrc",
                    "virtual_size": "0x000d1e08"
                },
                "type": "generic",
                "description": "A section with a high entropy has been found"
            },
            {
                "entropy": 0.78984485190409,
                "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": "6a45e31157f9984a7ed597a673651b213dff64a5ce517c4a12c4697c45f5c70a.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": 3.0776619911194,
            "dport": 137,
            "sport": 137
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 2018,
            "time": 3.0407209396362,
            "dport": 5355,
            "sport": 51001
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 2346,
            "time": 1.0183818340302,
            "dport": 5355,
            "sport": 53595
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 2674,
            "time": 3.0530898571014,
            "dport": 5355,
            "sport": 53848
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 3002,
            "time": 1.6170179843903,
            "dport": 5355,
            "sport": 54255
        },
        {
            "src": "192.168.56.101",
            "dst": "224.0.0.252",
            "offset": 3330,
            "time": -0.099952220916748,
            "dport": 5355,
            "sport": 55314
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 3658,
            "time": 1.0936830043793,
            "dport": 1900,
            "sport": 1900
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 9036,
            "time": 1.0502758026123,
            "dport": 3702,
            "sport": 49152
        },
        {
            "src": "192.168.56.101",
            "dst": "239.255.255.250",
            "offset": 13228,
            "time": 3.1087608337402,
            "dport": 1900,
            "sport": 53598
        }
    ],
    "dns_servers": [],
    "http": [],
    "icmp": [],
    "smtp": [],
    "tcp": [],
    "smtp_ex": [],
    "mitm": [],
    "hosts": [],
    "pcap_sha256": "7dd324d1902dcb7d19d79771ce56e128f40173deab3227a08e3a324905d7552b",
    "dns": [],
    "http_ex": [],
    "domains": [],
    "dead_hosts": [],
    "sorted_pcap_sha256": "3c78f2260e7f9681de1a6a04e8ac2507acc8975e8e407eec0a12e79bde48471e",
    "irc": [],
    "https_ex": []
}

Screenshots

Filename variants

48946a263b4fd20ba40bb7324c118f6f471e307a may also use other filenames. The most common variants are listed below:

• AM_Delta_Patch_1.303.492.0.exe

Folder name variants

48946a263b4fd20ba40bb7324c118f6f471e307a may also be located in other folders than c:\Windows\SoftwareDistribution\Download\. The most common variants are listed below:

• c:\Windows\SoftwareDistribution\Download\Install\

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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