UAC-0099 Using WinRAR Exploit to Target Ukrainian Firms with LONEPAGE Malware
Dec 22, 2023
Malware / Cyber Attack
The threat actor known as UAC-0099 has been linked to continued attacks aimed at Ukraine, some of which leverage a high-severity flaw in the WinRAR software to deliver a malware strain called LONEPAGE. "The threat actor targets Ukrainian employees working for companies outside of Ukraine," cybersecurity firm Deep Instinct said in a Thursday analysis. UAC-0099 was first documented by the Computer Emergency Response Team of Ukraine (CERT-UA) in June 2023, detailing its attacks against state organizations and media entities for espionage motives. The attack chains leveraged phishing messages containing HTA, RAR, and LNK file attachments that led to the deployment of LONEPAGE , a Visual Basic Script (VBS) malware that's capable of contacting a command-and-control (C2) server to retrieve additional payloads such as keyloggers, stealers, and screenshot malware. "During 2022-2023, the mentioned group received unauthorized remote access to several...
