What is a77da33312a32cc176c7c247f8f881acafe40e60?
a77da33312a32cc176c7c247f8f881acafe40e60 is part of Microsoft Malware Protection and developed by Microsoft Corporation according to the a77da33312a32cc176c7c247f8f881acafe40e60 version information.
a77da33312a32cc176c7c247f8f881acafe40e60's description is "Microsoft Antimalware WU Stub"
a77da33312a32cc176c7c247f8f881acafe40e60 is digitally signed by Microsoft Corporation.
a77da33312a32cc176c7c247f8f881acafe40e60 is usually located in the 'c:\Windows\SoftwareDistribution\Download\' folder.
Some of the anti-virus scanners at VirusTotal detected a77da33312a32cc176c7c247f8f881acafe40e60.
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 a77da33312a32cc176c7c247f8f881acafe40e60:
| Property | Value |
|---|---|
| Product name | Microsoft Malware Protection |
| Company name | Microsoft Corporation |
| File description | Microsoft Antimalware WU Stub |
| Internal name | AM_Delta_Patch_1.287.369.0.exe |
| Original filename | AM_Delta_Patch_1.287.369.0.exe |
| Legal copyright | © Microsoft Corporation. All rights reserved. |
| Product version | 1.287.402.0 |
| File version | 1.287.402.0 |
Here's a screenshot of the file properties when displayed by Windows Explorer:
| Product name | Microsoft Malware Protection |
| Company name | Microsoft Corporation |
| File description | Microsoft Antimalware WU Stub |
| Internal name | AM_Delta_Patch_1.287.369.0.exe |
| Original filename | AM_Delta_Patch_1.287.369.0.exe |
| Legal copyright | © Microsoft Corporation. All rights.. |
| Product version | 1.287.402.0 |
| File version | 1.287.402.0 |
Digital signatures [?]
a77da33312a32cc176c7c247f8f881acafe40e60 has a valid digital signature.
| Property | Value |
|---|---|
| Signer name | Microsoft Corporation |
| Certificate issuer name | Microsoft Code Signing PCA |
| Certificate serial number | 33000001b1ddedba54e965b85f0001000001b1 |
VirusTotal report
1 of the 65 anti-virus programs at VirusTotal detected the a77da33312a32cc176c7c247f8f881acafe40e60 file. That's a 2% detection rate.
| Scanner | Detection Name |
|---|---|
| CrowdStrike | win/malicious_confidence_80% (D) |
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\\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:\\Windows\\System32\\lsass.exe",
"process_name": "lsass.exe",
"pid": 476,
"summary": {},
"first_seen": 1607244786.34375,
"ppid": 376
},
{
"process_path": "C:\\Users\\cuck\\AppData\\Local\\Temp\\1707eea71a90a1694ee27dcfeed4d581412ff333c5cfaec27c7823bdd7016111.bin",
"process_name": "1707eea71a90a1694ee27dcfeed4d581412ff333c5cfaec27c7823bdd7016111.bin",
"pid": 2460,
"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\\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": 1607244786.59375,
"ppid": 2676
}
]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": 5,
"families": [],
"description": "Searches running processes potentially to identify processes for sandbox evasion, code injection or memory dumping",
"severity": 2,
"marks": [
{
"call": {
"category": "process",
"status": 1,
"stacktrace": [],
"api": "Process32NextW",
"return_value": 1,
"arguments": {
"process_name": "python.exe",
"snapshot_handle": "0x0000000000000040",
"process_identifier": 2060
},
"time": 1607244357.222021,
"tid": 2888,
"flags": {}
},
"pid": 2460,
"type": "call",
"cid": 81
},
{
"call": {
"category": "process",
"status": 1,
"stacktrace": [],
"api": "Process32NextW",
"return_value": 1,
"arguments": {
"process_name": "taskhost.exe",
"snapshot_handle": "0x0000000000000040",
"process_identifier": 3000
},
"time": 1607244357.222021,
"tid": 2888,
"flags": {}
},
"pid": 2460,
"type": "call",
"cid": 82
},
{
"call": {
"category": "process",
"status": 1,
"stacktrace": [],
"api": "Process32NextW",
"return_value": 1,
"arguments": {
"process_name": "SearchProtocolHost.exe",
"snapshot_handle": "0x0000000000000040",
"process_identifier": 2724
},
"time": 1607244357.222021,
"tid": 2888,
"flags": {}
},
"pid": 2460,
"type": "call",
"cid": 83
},
{
"call": {
"category": "process",
"status": 1,
"stacktrace": [],
"api": "Process32NextW",
"return_value": 1,
"arguments": {
"process_name": "SearchFilterHost.exe",
"snapshot_handle": "0x0000000000000040",
"process_identifier": 2924
},
"time": 1607244357.222021,
"tid": 2888,
"flags": {}
},
"pid": 2460,
"type": "call",
"cid": 84
},
{
"call": {
"category": "process",
"status": 1,
"stacktrace": [],
"api": "Process32NextW",
"return_value": 1,
"arguments": {
"process_name": "1707eea71a90a1694ee27dcfeed4d581412ff333c5cfaec27c7823bdd7016111.bin",
"snapshot_handle": "0x0000000000000040",
"process_identifier": 2460
},
"time": 1607244357.222021,
"tid": 2888,
"flags": {}
},
"pid": 2460,
"type": "call",
"cid": 85
}
],
"references": [],
"name": "injection_process_search"
},
{
"markcount": 2,
"families": [],
"description": "The binary likely contains encrypted or compressed data indicative of a packer",
"severity": 2,
"marks": [
{
"entropy": 7.996480740215591,
"section": {
"size_of_data": "0x00048200",
"virtual_address": "0x00041000",
"entropy": 7.996480740215591,
"name": ".rsrc",
"virtual_size": "0x00048074"
},
"type": "generic",
"description": "A section with a high entropy has been found"
},
{
"entropy": 0.5438265786993403,
"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": "1707eea71a90a1694ee27dcfeed4d581412ff333c5cfaec27c7823bdd7016111.bin",
"type": "ioc",
"description": null
}
],
"references": [],
"name": "process_interest"
}
]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": 6.224639177322388,
"dport": 137,
"sport": 137
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 2134,
"time": 6.183411121368408,
"dport": 5355,
"sport": 51001
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 2462,
"time": 4.161978006362915,
"dport": 5355,
"sport": 53595
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 2790,
"time": 6.198002099990845,
"dport": 5355,
"sport": 53848
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 3118,
"time": 4.665549993515015,
"dport": 5355,
"sport": 54255
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 3446,
"time": 3.0547900199890137,
"dport": 5355,
"sport": 55314
},
{
"src": "192.168.56.101",
"dst": "239.255.255.250",
"offset": 3774,
"time": 4.692323207855225,
"dport": 1900,
"sport": 1900
},
{
"src": "192.168.56.101",
"dst": "239.255.255.250",
"offset": 7102,
"time": 4.1995580196380615,
"dport": 3702,
"sport": 49152
},
{
"src": "192.168.56.101",
"dst": "239.255.255.250",
"offset": 11294,
"time": 6.271018028259277,
"dport": 1900,
"sport": 53598
}
],
"dns_servers": [],
"http": [],
"icmp": [],
"smtp": [],
"tcp": [],
"smtp_ex": [],
"mitm": [],
"hosts": [],
"pcap_sha256": "42196972cd025ef46611c79832c1d53b6b45cec31dd6e4408a6e394a7e85defc",
"dns": [],
"http_ex": [],
"domains": [],
"dead_hosts": [],
"sorted_pcap_sha256": "24a411f9359e67203b45dce4d7fec8e30f4a547c0063543476cdac965822913f",
"irc": [],
"https_ex": []
}Screenshots
Hashes [?]
| Property | Value |
|---|---|
| MD5 | fed1bd75a3207e5db96917a59e87bce6 |
| SHA256 | 1707eea71a90a1694ee27dcfeed4d581412ff333c5cfaec27c7823bdd7016111 |
What will you do with the file?
To help other users, please let us know what you will do with the file:
What did other users do?
The poll result listed below shows what users chose to do with the file. 100% have voted for removal. Based on votes from 2 users.
| Votes | |||
|---|---|---|---|
| Keep | 0 % | 0 | |
| Remove | 100 % | 2 |
NOTE: Please do not use this poll as the only source of input to determine what you will do with the file. Only 2 users 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.
And now some shameless self promotion ;)
Hi, my name is Roger Karlsson. I've been running this website since 2006. I want to let you know about the FreeFixer program. FreeFixer is a freeware tool that analyzes your system and let you manually identify unwanted programs. Once you've identified some malware files, FreeFixer is pretty good at removing them. You can download FreeFixer here. It runs on Windows 2000/XP/2003/2008/2016/2019/Vista/7/8/8.1/10. Supports both 32- and 64-bit Windows.
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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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