https://www.bleepingcomputer.com/news/security/certutilexe-could-allow-attackers-to-download-malware-while
--- https://docs.microsoft.com/en-us/sysinternals/downloads/accesschk
The
certutil command is a Windows utility that can be used to manipulate certificates and certificate authorities.
However, it can also be abused by attackers to download files from remote servers using the -urlcache option.
In this case, the command downloads accesschk64.exe from http://192.168.2.124/windows-binaries/ and saves it locally. Accesschk64.exe is a tool that can be used to check service permissions and identify potential privilege escalation vectors. The other commands are not relevant for this purpose. Powershell is a scripting language that can be used to perform various tasks, but in this case it uploads a file instead of downloading one. Schtasks is a command that can be used to create or query scheduled tasks, but it does not help with service permissions. Wget is a Linux command that can be used to download files from the web, but it does not work on Windows by default.