Read More 2 minute read Cyber Attacks Malware Security Bitter APT Exploiting Old WinRAR Vulnerability in New Backdoor Attacks South Asian hacking group Bitter (APT-Q-37) is deploying a C# backdoor using two new methods: a WinRAR flaw and malicious Office XLAM files, targeting government and military sectors. byDeeba AhmedOctober 22, 2025