Second Ransomware Family Exploiting Log4j Spotted In US, Europe
While previous reports indicated that TellYouThePass was mainly being directed against targets in China, researchers at Sophos told VentureBeat that they’ve observed the attempted delivery of TellYouThePass ransomware both inside and outside of China — including in the U.S. and Europe. “Systems in China were targeted, as well as some hosted in Amazon and Google cloud services in the U.S. and at several sites in Europe,” said Sean Gallagher, a senior threat researcher at Sophos Labs, in an email to VentureBeat on Tuesday. Sophos detected attempts to deliver TellYouThePass payloads by utilizing the Log4j vulnerability on December 17 and December 18, Gallagher said. TellYouThePass has versions that run on either Linux or Windows, “and has a history of exploiting high-profile vulnerabilities like EternalBlue,” said Andrew Brandt, a threat researcher at Sophos, in an email. The Linux version is capable of stealing Secure Socket Shell (SSH) keys and can perform lateral movement, Brandt said. Sophos initially disclosed its detection of TellYouThePass ransomware in a December 20 blog post.
The first report of TellYouThePass ransomware exploiting the Log4j vulnerability appears to have come from the head of Chinese cybersecurity group KnownSec 404 Team on December 12. The attempted deployment of TellYouThePass in conjunction with Log4Shell was subsequently confirmed by additional researchers, according to researcher community Curated Intelligence. In a blog post Tuesday, Curated Intelligence said its members can now confirm that TellYouThePass has been seen exploiting the vulnerability “in the wild to target both Windows and Linux systems.” TellYouThePass had most recently been observed in July 2020, Curated Intelligence said. It joins Khonsari, a new family of ransomware identified in connection with exploits of the Log4j vulnerability.
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