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About ProCheckUp21 years of expertise

ProCheckUp is a London-based independent provider of cyber security services, including IT Security, Assurance, Compliance and Incident Response. We commenced offering Penetration Testing and Compliance services in 1999, and have since developed a wider portfolio of enterprise-wide security and consulting services to help customers comprehensively handle the information security challenges of today.


Penetration testing

Penetration testing

Identifying risk and formulating a robust security strategy


ProCheckUp work with merchants and vendors to assist on their journey to PCI DSS compliance


Does your organization need immediate assistance for a possible incident?


On 25 May 2018 GDPR will come into effect, is your organisation ready?


ProCheckUp blogs

Monday, January 27, 2020 by Nga Hoang

All This AV Bypassing Is Giving Me a Headache

I was recently tasked with deploying AV updates to a bunch of Windows machines in my corporate network and around about the same time someone had posed me a question asking something along the lines of what I did to get past Windows Defender. I’m not a red-teamer (though I think my alter-ego would c ...

Friday, January 3, 2020 by Guy Newman

DNS-over-HTTPS: Panacea or not?

The trusted padlock icon on your browser may make you feel all warm and safe whilst browsing and running in incognito mode, but these protections only go part way to securing your Internet traffic. DNS searches (the translation of a domain name to an IP address) occur seamlessly whilst browsing, and ...

Friday, September 27, 2019 by Guy Newman

Getting the Best out of Nessus – Part Two

Following on from the previous article, which covered prerequisites to obtain authenticated scan results using Tenable's standalone Nessus vulnerability scanner, part two covers specifics for configuring credentials. This includes tips and information to help verify credentials are working for Windo ...

Incident Response Information and Assistance

Since 2001, ProCheckUp, has conducted incident response investigations across all industries, organization sizes, and technical environments. If your organization needs immediate assistance for a possible incident or security breach please contact us by completing the form on the right or calling us at one of our incident response lines listed below. You can also email our incident response team at

Once we receive your request, a ProCheckUp consultant will contact you to discuss your inquiry.