UK-based telecommunications company Colt Technology Services confirms that customer documentation was stolen as Warlock ransomware gang auctions files.
The British telecommunications and network services provider previously disclosed it suffered an attack on August 12, but this is the first time they confirmed data had been stolen.
“A criminal group has accessed certain files from our systems that may contain information related to our customers and posted the document titles on the dark web,” reads an updatedsecurity incident advisory on Colt’s site.
“We understand that this is concerning for you.”
“Customers are able to request a list of filenames posted on the dark web from the dedicated call centre.”
This statement comes after the Warlock Group began selling on the Ramp cybercrime forum what they claim is 1 million documents stolen from Colt. The documents are being sold for $200,000 and allegedly contain financial information, network architecture data, and customer information.