A cyber criminal has claimed to have exfiltrated sensitive data, including T-Mobile’s virtual machine (VM) logs, from French IT services firm Capgemini .
According to a post on popular hacking message board BreachForums , the perpetrator – who goes by the name ‘greb’ – gained access to Capgemini’s network earlier this month.
The attacker claims they were able to steal 20 GB of data, including a number of databases , source code, private keys, employee information, threat reports, API keys , and credentials.
One of the data samples provided by greb appears to show log files allegedly generated by VMs belonging to T-Mobile .
If confirmed, this would mark the latest in a series of incidents where internal company information has been leaked following a supply chain breach. The news underlines growing security concerns around third party risk and supply chain attacks across the sector.
ITPro has approached T-Mobile for comment on this development, but has not received a response.
Capgemini is a French multinational IT services and consulting company headquartered in Paris . The firm offers digital covering cloud, AI , cybersecurity, and engineering.
The company’s market cap currently sits at $36.28 billion (£27.49 billion), making it the 560th most valuable company in the world according to market data , generating $22.5 billion (£17.05 billion) in revenue in 2023.
The firm recently won a UK government tender contract to run the HMRC’s legacy tax management systems until 2029, said to be worth up to $750 million (£568 million).
The contract to provide these services was opened up to offers after it was announced the software used for the current system, SAP ECC6.0, will exit mainstream support by the end of 2027.
Capgemini yet to confirm cyber intrusion
The breach has appeared on other dark web hacking forums posted by users under different monikers.
Notably, in one listing the attacker claimed they could have stolen more data during the period of unauthorized access to Capgemini’s network, but chose to only exfiltrate larger files .
“They had more data but I decided to exfiltrate only big files, company confidential, terraform and many more.”
It is not clear if this post was made by the initial poster greb reposting their exploits to gain further publicity, which they could leverage for potential ransom negotiations , or other cyber criminals trying to exploit the breach for their own gain.
Capgemini is yet to confirm the authenticity of the data samples provided by the attacker, or whether they were the victims of a cyber attack earlier this month.
ITPro has approached Capgemini asking if it can confirm or deny the claims made by the alleged perpetrator, but has not received a response.
According to GDPR requirements, the firm has 72 hours after confirming it has suffered an attack to notify the relevant national data protection agency, in this case France’s Commission Nationale Informatique & Libertés (CNIL).
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