CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
19.0%
This is a proof of concept program to escalate privileges on a Windows host by abusing WSUS. Details in this blog post: <https://www.gosecure.net/blog/2020/09/08/wsus-attacks-part-2-cve-2020-1013-a-windows-10-local-privilege-escalation-1-day/> It was inspired from the WSuspect proxy project: <https://github.com/ctxis/wsuspect-proxy>
Acknowledgements
Privilege escalation module written by Maxime Nadeau from GoSecure
Huge thanks to:
Usage
The tool was tested on Windows 10 machines (10.0.17763 and 10.0.18363) in different domain environments.
Usage: WSuspicious [OPTION]...
Ex. WSuspicious.exe /command:"" - accepteula - s - d cmd / c """"echo 1 > C:\\wsuspicious.txt"""""" /autoinstall
Creates a local proxy to intercept WSUS requests and try to escalate privileges.
If launched without any arguments, the script will simply create the file C:\\wsuspicious.was.here
/exe The full path to the executable to run
Known payloads are bginfo and PsExec. (Default: .\PsExec64.exe)
/command The command to execute (Default: -accepteula -s -d cmd /c ""echo 1 > C:\\wsuspicious.was.here"")
/proxyport The port on which the proxy is started. (Default: 13337)
/downloadport The port on which the web server hosting the payload is started. (Sometimes useful for older Windows versions)
If not specified, the server will try to intercept the request to the legitimate server instead.
/debug Increase the verbosity of the tool
/autoinstall Start Windows updates automatically after the proxy is started.
/enabletls Enable HTTPS interception. WARNING. NOT OPSEC SAFE.
This will prompt the user to add the certificate to the trusted root.
/help Display this help and exit
Compilation
The ILMerge dependency can be used to compile the application into a standalone .exe file. To compile and compile the application, simply use the following command:
dotnet msbuild /t:Restore /t:Clean /t:Build /p:Configuration=Release /p:DebugSymbols=false /p:DebugType=None /t:ILMerge /p:TrimUnusedDependencies=true
CVSS2
Attack Vector
NETWORK
Attack Complexity
MEDIUM
Authentication
NONE
Confidentiality Impact
COMPLETE
Integrity Impact
COMPLETE
Availability Impact
COMPLETE
AV:N/AC:M/Au:N/C:C/I:C/A:C
CVSS3
Attack Vector
ADJACENT
Attack Complexity
HIGH
Privileges Required
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality Impact
HIGH
Integrity Impact
HIGH
Availability Impact
HIGH
CVSS:3.1/AV:A/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
AI Score
Confidence
High
EPSS
Percentile
19.0%