Telstra Group (ASX:TLS) and Commonwealth Bank of Australia (ASX:CBA) extended their anti-scam and fraud collaboration and rolled out the "Fraud Indicator" technology to address rising cases of identity theft in the country, according to a joint statement Monday.

The technology can detect unusual mobile service usage and share it securely to flag potential identity theft. It is expected to improve CommBank's detection rate for fraudulently opened accounts by more than 25% for joint CommBank and Telstra customers, per the statement.

Star Entertainment Group's shares were down almost 1% in recent Monday trade.