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Attackers use encrypted RPMSG messages in Microsoft 365 targeted phishing attacks

Security Affairs

Experts warn of phishing attacks that are combining the use of compromised Microsoft 365 accounts and.rpmsg encrypted emails. Trustwave researchers have observed threat actors using encrypted RPMSG attachments sent via compromised Microsoft 365 accounts in a phishing campaign aimed at stealing Microsoft credentials.

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TeamTNT is back and targets servers to run Bitcoin encryption solvers

Security Affairs

AquaSec researchers observed the cybercrime gang TeamTNT hijacking servers to run Bitcoin solver since early September. In the first week of September, AquaSec researchers identified at least three different attacks targeting their honeypots, the experts associated them with the cybercrime gang TeamTNT. ” continue the experts.

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Rogue ChatGPT extension FakeGPT hijacked Facebook accounts

Security Affairs

A tainted version of the legitimate ChatGPT extension for Chrome, designed to steal Facebook accounts, has thousands of downloads. Guardio ’s security team uncovered a new variant of a malicious Chat-GPT Chrome Extension that was already downloaded by thousands a day. Left: The “FakeGPT” Variant on Chrome Store.

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Info stealers and how to protect against them

Security Affairs

Some info stealers may use encryption techniques to hide their communication with command-and-control servers, making it more challenging for security systems to detect malicious activities. Bank logs : These are sets of data containing sensitive information about a bank account.

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GoTo revealed that threat actors stole customers’ backups and encryption key for some of them

Security Affairs

GoTo is notifying customers that its development environment was breached in November 2022, attackers stole customers’ backups and encryption key. “Upon learning of the incident, we immediately launched an investigation, engaged Mandiant, a leading security firm, and alerted law enforcement. . ” continues the notice.

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Rorschach ransomware has the fastest file-encrypting routine to date

Security Affairs

A new ransomware strain named Rorschach ransomware supports the fastest file-encrypting routine observed to date. The researchers conducted five separate encryption speed tests in a controlled environment (with 6 CPUs, 8192MB RAM, SSD, and 220000 files to be encrypted), limited to local drive encryption only.

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ViperSoftX uses more sophisticated encryption and anti-analysis techniques

Security Affairs

xyz pic.twitter.com/VLhISark8Y — Goldwave (@OGoldwave) March 13, 2023 The variant employed in the campaign supports a more sophisticated encryption method of byte remapping and a monthly rotation of the C2 server. #ViperSoftX is back, doesn't look like much has changed. c2 arrowlchat[.]com ” concludes the report.