What is Ursnif?
Ursnif (S0386), a variant of the Gozi malware, is a prevalent banking trojan used for financial fraud. It typically spreads through phishing emails and operates stealthily to avoid detection.
A key feature of Ursnif is its use of web injection, where it alters legitimate banking sites to trick users into entering sensitive data. As a keylogger, it also captures credentials and can download other malware, making it a persistent threat.
How to Defend Against Ursnif?
Defending against Ursnif requires blocking its initial delivery and detecting its specific web-based attack methods.
- Be cautious with email attachments and links, as phishing is the primary delivery vector for this trojan.
- Keep all systems and software patched to limit the vulnerabilities that can be exploited for initial access.
- Deploy endpoint detection and antivirus software to identify and block the Trojan’s execution and its web injection techniques.
- Use network detection (NDR) with integrated threat intelligence to spot and block C2 communications associated with Ursnif.
