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The BlackCat ransomware crew has been spotted fine-tuning their malware arsenal to fly under the radar and expand their reach.

“Among some of the more notable developments has been the use of a new version of the Exmatter data exfiltration tool, and the use of Eamfo, information-stealing malware that is designed to steal credentials stored by Veeam backup software,” researchers from Symantec said in a new report.

BlackCat, also known by the names ALPHV and Noberus, is attributed to an adversary tracked as Coreid (aka FIN7, Carbanak, or Carbon Spider) and is said to be a rebranded successor of DarkSide and BlackMatter, both of which shut shop last year following a string of high-profile attacks, including that of Colonial Pipeline.

The threat actor, like other notorious ransomware groups, is known to run a ransomware-as-a-service (RaaS) operation, which involves its core developers enlisting the help of affiliates to carry out the attacks in exchange for a cut of the illicit proceeds.

ALPHV is also one of the first ransomware strains to be programmed in Rust, a trend that has since been adopted by other families such as Hive and Luna in recent months to develop and distribute cross-platform malware.

images from Hacker News