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Cerber Ransomware Exploits Confluence Vulnerability
Sophos has tracked the exploitation of Confluence vulnerability CVE-2022-26134, discovering that the attack vector is shrinking with fewer vulnerable Confluence servers. Despite this, two exploit attempts were observed targeting Windows servers to deploy Cerber ransomware. Attackers ran curl and PowerShell commands, with the PowerShell command encoded to download and execute a payload in the %temp% folder. The attacks were mitigated successfully, with no evidence of data exfiltration or lateral movement.
Attackers Exploit Telerik UI to Deliver Cryptominer and Cobalt Strike
Sophos researchers have identified the reuse of tactics, techniques, and procedures (TTPs) by attackers exploiting the Telerik UI vulnerability CVE-2019-18935. The threat actors deliver Cobalt Strike beacons to disk, executing encoded PowerShell commands to download additional malware and establish persistence. The observed attack chain includes placing the Cobalt Strike DLL payload in the C:\Windows\Temp directory, downloading cryptominer XMRig, and using group policy objects and scheduled tasks for persistence.
An Analysis of BlackCat Ransomware Attacks & Operations
Microsoft's tracking of Blackcat/ALPHV ransomware details varied tactics, including Exchange server exploits and stolen credentials. Case studies reveal sophisticated methods like RClone, MEGASync, and PsExec for data exfiltration and ransomware deployment.
Cloudflare Stops Record DDoS Attack with 26 million rps
Cloudflare has identified and mitigated a record distributed denial-of-service (DDoS) attack, amassing 26 million requests per second (rps). The attack targeted a customer website on Cloudflare’s Free plan. Similar to a previous 15M rps attack, this one also primarily originated from cloud service providers, indicating the use of hijacked virtual machines and powerful servers rather than weaker Internet of Things (IoT) devices. The botnet responsible for the attack comprised 5,067 devices, capable of generating over 212 million HTTPS requests within 30 seconds, and spanned 1,500 networks across 121 countries. The top source by country was Indonesia, accounting for over 15% of the traffic, followed by the United States, Brazil, and Russia. The use of HTTPS in the attack added complexity due to the computational demands of establishing TLS encrypted connections.
Vice Society Ransomware Responsible for Cyberattack on Palermo Italy
Vice Society ransomware group attacked Palermo, Italy on June 3rd, 2022, causing the city's IT infrastructure to shut down. The outage impacted 1.3 million residents and tourists. Vice Society has threatened to publish stolen data by June 12th if their ransom demands are not met. Palermo officials have not disclosed technical details.
Watching Black Basta Ransomware & Qakbot
Since its emergence in April 2022, Black Basta ransomware, linked to Conti, uses Qakbot malware for lateral movement. NCC Group reports tactics like RDP enabling, firewall modification, and Cobalt Strike beacons. Attackers use PowerShell and WMI to spread ransomware across networks during final stages.
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