The LockBit ransomware as a service group has published data allegedly belonging to Royal Mail International via its deep web blog, more than a month after the postal company confirmed the attack.
LockBit is also still demanding a ransom of £33 million - a sum considerably lower than the £65 million ransom originally demanded.
The leaked data was made available for download via a 44GB compressed 7-Zip file and a manifest of the file’s contents was also made available in a separate plaintext document.
An initial analysis of the documents appears to show a number of sensitive files relating to various corners of the business.
One employee’s HR records, including their first, second, and third disciplinary warning, and one detailing their ultimate dismissal, appeared to be included in the thousands of leaked files.
Other files alluded to salary and overtime payment information for various employees with their full names attached to the document. One file referred to ‘network layout’, and a number of files appeared to relate to contracts with various third parties.
A significant number of files came from one individual's OneDrive which appears to have been raided by the cyber criminals. It contained images, their own vaccine records, and other miscellaneous files.
IT Pro reached out to Royal Mail International to confirm the legitimacy of the documents included in the leak, but the company did not answer specific questions.
“Royal Mail is aware that an unauthorised third party has published some data allegedly obtained from our network,” it told IT Pro in a statement. “The cyber incident impacted a system concerned with shipping mail overseas.
“At this stage of the investigation, we believe that the vast majority of this data is made up of technical program files and administrative business data. All of the evidence suggests that this data contains no financial information or other sensitive customer information. We continue to work closely with law enforcement agencies.”
An examination of the file tree supplied by LockBit appears to confirm Royal Mail’s claims that most of the files are not sensitive in nature.
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The company confirmed to the Telegraph that around 200 employees’ personal details were involved in the leak and that those affected have been informed.
It is unclear why LockBit still demands a ransom given it has now leaked the data on the company.
Royal Mail declined to answer when asked if LockBit had any additional data belonging to the company, or if it still required LockBit’s decryptor to fully restore its systems.
“International export services have been reinstated to all destinations for purchase through our shipping solutions and Post Office branches,” it told IT Pro. “We are now processing close to normal daily volumes of international export mail with some delays.”
LockBit has leaked the negotiation history with Royal Mail and thousands of files allegedly taken from its systems. Royal Mail also said it has recovered the point where it's operating close to normal daily volumes.
In usual cases this would be all the leverage a cyber criminal group would have over a victim, so why a ransom demand remains is unknown.
Unprecedented insight into ransomware negotiations
On 14 February, LockBit released the entire negotiation history between it and Royal Mail International, offering a rare insight into the negotiation tactics of the world’s leading ransomware operation.
It followed more than a month of negotiations which were most likely handled and strategised by the UK’s National Cyber Security Centre (NCSC) and National Crime Agency (NCA).
The transcript of the negotiations, which took place over instant text messages, showed the tactics deployed by UK authorities, such as trying to persuade LockBit to send files over to prove its decryptor worked.
LockBit caught on to the tactic which appeared to trick the cyber criminals into decrypting the files needed to make a full recovery without paying the ransom, which at the time was set at £65.7 million.
The ransom demands were later lowered to £57.4 million, but Royal Mail’s negotiator(s) said this was still far too great a sum to ever consider paying.
The NCSC’s longstanding advice is to never pay ransom demands and the negotiations never indicated that Royal Mail was ever willing to pay.
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