What is knbdrv.sys?
knbdrv.sys is part of ??????? and developed by Kingsoft Corporation according to the knbdrv.sys version information.
knbdrv.sys's description is "?????????????"
knbdrv.sys is digitally signed by Beijing Kingsoft Security software Co.,Ltd.
knbdrv.sys is usually located in the 'c:\windows\system32\drivers\' folder.
None of the anti-virus scanners at VirusTotal reports anything malicious about knbdrv.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.
Vendor and version information [?]
The following is the available information on knbdrv.sys:
| Property | Value |
|---|---|
| Product name | ??????? |
| Company name | Kingsoft Corporation |
| File description | ????????????? |
| Internal name | knbdrv |
| Original filename | knbdrv.sys |
| Legal copyright | Copyright (C) 2015 Kingsoft Corporation |
| Product version | 6.5.115.19087 |
| File version | 6.5.115.19087 |
Here's a screenshot of the file properties when displayed by Windows Explorer:
| Product name | ??????? |
| Company name | Kingsoft Corporation |
| File description | ????????????? |
| Internal name | knbdrv |
| Original filename | knbdrv.sys |
| Legal copyright | Copyright (C) 2015 Kingsoft Corporat.. |
| Product version | 6.5.115.19087 |
| File version | 6.5.115.19087 |
Digital signatures [?]
knbdrv.sys has a valid digital signature.
| Property | Value |
|---|---|
| Signer name | Beijing Kingsoft Security software Co.,Ltd |
| Certificate issuer name | VeriSign Class 3 Code Signing 2010 CA |
| Certificate serial number | 4c6d7b5ea289c274426434e65b417aba |
VirusTotal report
None of the 70 anti-virus programs at VirusTotal detected the knbdrv.sys file.
Sandbox Report
The following information was gathered by executing the file inside Cuckoo Sandbox.
Summary
Successfully executed process in sandbox.
Summary
{
"dll_loaded": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
],
"file_opened": [
"C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
],
"command_line": [
"\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll,DllMain"
],
"file_exists": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll.manifest",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
],
"file_read": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
],
"regkey_read": [
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\Windows Error Reporting\\WMR\\Disable",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
]
}Generic
[
{
"process_path": "C:\\Windows\\SysWOW64\\rundll32.exe",
"process_name": "rundll32.exe",
"pid": 2436,
"summary": {
"dll_loaded": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
],
"file_opened": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
],
"command_line": [
"\"C:\\Windows\\System32\\rundll32.exe\" C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll,DllMain"
],
"file_exists": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll.manifest",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
],
"file_read": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
],
"regkey_read": [
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
]
},
"first_seen": 1566924784.6406,
"ppid": 2736
},
{
"process_path": "C:\\Windows\\System32\\rundll32.exe",
"process_name": "rundll32.exe",
"pid": 1676,
"summary": {
"file_opened": [
"C:\\Windows\\System32\\en-US\\KERNELBASE.dll.mui"
],
"file_exists": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll.manifest",
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
],
"regkey_read": [
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows\\Windows Error Reporting\\WMR\\Disable",
"HKEY_LOCAL_MACHINE\\SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\GRE_Initialize\\DisableMetaFiles"
],
"dll_loaded": [
"C:\\Users\\cuck\\AppData\\Local\\Temp\\83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974.bin.dll"
]
},
"first_seen": 1566924785.375,
"ppid": 2436
},
{
"process_path": "C:\\Windows\\System32\\lsass.exe",
"process_name": "lsass.exe",
"pid": 476,
"summary": {},
"first_seen": 1566924784.3438,
"ppid": 376
}
]Signatures
[
{
"markcount": 1,
"families": [],
"description": "This executable has a PDB path",
"severity": 1,
"marks": [
{
"category": "pdb_path",
"ioc": "F:\\liebao_src_pool\\release.b57_stable_8003\\src_import\\build\\Release\\dbginfo\\knbdrv64.pdb",
"type": "ioc",
"description": null
}
],
"references": [],
"name": "has_pdb"
},
{
"markcount": 1,
"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
}
],
"references": [],
"name": "pe_features"
},
{
"markcount": 1,
"families": [],
"description": "Foreign language identified in PE resource",
"severity": 2,
"marks": [
{
"name": "RT_VERSION",
"language": "LANG_CHINESE",
"offset": "0x0002d060",
"filetype": "data",
"sublanguage": "SUBLANG_CHINESE_SIMPLIFIED",
"type": "generic",
"size": "0x00000324"
}
],
"references": [],
"name": "origin_langid"
}
]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": 6.2174508571625,
"dport": 137,
"sport": 137
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 5694,
"time": 6.1614968776703,
"dport": 5355,
"sport": 51001
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 6022,
"time": 4.1511650085449,
"dport": 5355,
"sport": 53595
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 6350,
"time": 6.1695990562439,
"dport": 5355,
"sport": 53848
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 6678,
"time": 4.6594140529633,
"dport": 5355,
"sport": 54255
},
{
"src": "192.168.56.101",
"dst": "224.0.0.252",
"offset": 7006,
"time": 3.0424098968506,
"dport": 5355,
"sport": 55314
},
{
"src": "192.168.56.101",
"dst": "239.255.255.250",
"offset": 7334,
"time": 4.6730668544769,
"dport": 1900,
"sport": 1900
},
{
"src": "192.168.56.101",
"dst": "239.255.255.250",
"offset": 20274,
"time": 4.1858508586884,
"dport": 3702,
"sport": 49152
},
{
"src": "192.168.56.101",
"dst": "239.255.255.250",
"offset": 28658,
"time": 6.2641808986664,
"dport": 1900,
"sport": 53598
}
],
"dns_servers": [],
"http": [],
"icmp": [],
"smtp": [],
"tcp": [],
"smtp_ex": [],
"mitm": [],
"hosts": [],
"pcap_sha256": "affb007445421a11a9baf0ff56b1d9f29726d0d669f36bd7ced1583f739ca55d",
"dns": [],
"http_ex": [],
"domains": [],
"dead_hosts": [],
"sorted_pcap_sha256": "4185cd0171abc2f1cae1a05d83fc5fcbd52396ba4cb70293922e97ee81bd9d8a",
"irc": [],
"https_ex": []
}Screenshots
Hashes [?]
| Property | Value |
|---|---|
| MD5 | 5db315c13cfec6fd294a8f723f83cfce |
| SHA256 | 83f01718b4e3c292be60d550167629a4b7db8b682c9e63cc12a9856833150974 |
What will you do with knbdrv.sys?
To help other users, please let us know what you will do with knbdrv.sys:
What did other users do?
The poll result listed below shows what users chose to do with knbdrv.sys. 100% have voted for removal. Based on votes from 1 user.
| Votes | |||
|---|---|---|---|
| Keep | 0 % | 0 | |
| Remove | 100 % | 1 |
NOTE: Please do not use this poll as the only source of input to determine what you will do with knbdrv.sys. 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.
And now some shameless self promotion ;)
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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.
No comments posted yet.