Colt Technology Services Confirms Customer Data Theft After Warlock Ransomware Attack

UK-based telecommunications provider Colt Technology Services has confirmed that sensitive customer-related documentation was stolen in a recent ransomware incident. The company initially disclosed on August 12 that it had suffered a cyberattack, but this marks the first confirmation that data exfiltration took place.

In its updated advisory, Colt revealed that a criminal group accessed specific files from its systems that may contain customer information and subsequently posted the filenames on dark web forums. 

To assist affected clients, Colt has set up a dedicated call center where customers can request the list of exposed filenames. “We understand that this is concerning for you,” the company stated in its advisory. Notably, Colt also implemented a no-index HTML meta tag on the advisory webpage, ensuring the content would not appear in search engine results. 

The development follows claims from the Warlock ransomware gang, also known as Storm-2603, that they are auctioning one million stolen Colt documents for $200,000 on the Ramp cybercrime marketplace. The group alleges the files contain financial data, customer records, and details of network architecture. 

Cybersecurity experts verified that the Tox ID used in the forum listing matches identifiers see

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