Latest cybersecurity reporting from selected sources.

Russia-Linked Ransomware Group Dumps Customer Data After Failed Extortion AttemptUnder Armour may trade on the "blood, sweat, respect" slogan, but a Russia-linked ransomware group hasn't been abiding, after they stole data pertaining to 72.7 million of the athleisure giant's customers, then leaked it on darkweb sites after saying the retailer refused to pay a ransom.

​Dartmouth College has disclosed a data breach after the Clop extortion gang leaked data allegedly stolen from the school's Oracle E-Business Suite servers on its dark web leak site. [...]

The Qilin ransomware group has claimed responsibility for the attack at Japanese beer maker Asahi, adding the company to its extortion page on the dark web yesterday. [...]

Cybercriminals Say They Hacked 66 CompaniesThe Clop cybercriminal group is threatening to make public the companies swept up by its mass hacking of managed file-transfer software built by Cleo Communications. In a Dec. 24 update to its dark web leak site, Clop asserted it has "data of many companies who use Cleo."

The threat actors associated with the Medusa ransomware have ramped up their activities following the debut of a dedicated data leak site on the dark web in February 2023 to publish sensitive data of victims who are unwilling to agree to their demands

The Ragnar Locker ransomware operation's Tor negotiation and data leak sites were seized Thursday morning as part of an international law enforcement operation. [...]

Yet another data-extortion cybercrime operation has appeared on the darknet named 'RansomHouse' where threat actors publish evidence of stolen files and leak data of organizations that refuse to make a ransom payment. [...]