Security News

An unknown threat actor is brute-forcing Linux SSH servers to install a wide range of malware, including the Tsunami DDoS bot, ShellBot, log cleaners, privilege escalation tools, and an XMRig coin miner. Network administrators typically use SSH to manage Linux devices remotely, performing tasks such as running commands, changing the configuration, updating software, and troubleshooting problems.

A threat group tracked as APT28 and linked to Russia's General Staff Main Intelligence Directorate has breached Roundcube email servers belonging to multiple Ukrainian organizations, including government entities. In these attacks, the cyber-espionage group leveraged news about the ongoing conflict between Russia and Ukraine to trick recipients into opening malicious emails that would exploit Roundcube Webmail vulnerabilities to hack into unpatched servers.

A malware campaign is using fake OnlyFans content and adult lures to install a remote access trojan known as 'DcRAT,' allowing threat actors to steal data and credentials or deploy ransomware on the infected device. This is not the first time threat actors have taken advantage of OnlyFans to achieve their malicious goals, as in January 2023, attackers abused an open redirect on a UK state site to direct visitors to fake OnlyFans sites.

Governmental entities in the Middle East and Africa have been at the receiving end of sustained cyber-espionage attacks that leverage never-before-seen and rare credential theft and Exchange email exfiltration techniques. The company's Cortex Threat Research team is tracking the activity under the temporary name CL-STA-0043, describing it as a "True advanced persistent threat."

The BlackCat ransomware gang is behind a February cyberattack on Reddit, where the threat actors claim to have stolen 80GB of data from the company. On February 9th, Reddit disclosed that its systems were hacked on February 5th after an employee fell victim to a phishing attack.

Ransomware actors and cryptocurrency scammers have joined nation-state actors in abusing cloud mining services to launder digital assets, new findings reveal. Earlier this March, Google Mandiant disclosed North Korea-based APT43's use of the hash rental and cloud mining services to obscure the forensic trail and wash the stolen cryptocurrency "Clean."

A suspected pro-China hacker group tracked by Mandiant as UNC4841 has been linked to data-theft attacks on Barracuda ESG appliances using a now-patched zero-day vulnerability. "Due to the sophistication displayed by UNC4841 and lack of full visibility into all compromised appliances, Barracuda has elected to replace and not reimage the appliance from the recovery partition out of an abundance of caution," John Palmisano, Mandiant Incident Response Manager - Google Cloud, told BleepingComputer.

Symantec's threat research team, part of Broadcom, reports today that the threat actors have recently begun using USB malware to propagate to additional systems inside infected networks. Symantec's analysts report that Gamaredon's 2023 activity spiked between February and March 2023, while the hackers continued to maintain a presence on some compromised machines until May 2023.

Microsoft on Wednesday took the lid off a "Novel and distinct Russian threat actor," which it said is linked to the General Staff Main Intelligence Directorate and has a "Relatively low success rate." The tech giant's Threat Intelligence team, which was previously tracking the group under its emerging moniker DEV-0586, has graduated it to a named actor dubbed Cadet Blizzard.

The Chinese threat group 'ChamelGang' infects Linux devices with a previously unknown implant named 'ChamelDoH,' allowing DNS-over-HTTPS communications with attackers' servers. The link between ChamelGang and the new Linux malware is based on a domain previously associated with the threat actor and a custom privilege elevation tool observed by Positive Technologies in past ChamelGang campaigns.