Phantom Stealer Phishing: 2025 Attack Hits Russian Finance via ISO Emails
In late 2025, an active phishing campaign dubbed "Operation MoneyMount-ISO" began targeting the Russian financial sector and related industries, with threat actors distributing phishing emails containing malicious ISO disk image attachments. Once opened, these ISO files delivered the Phantom Stealer malware, enabling attackers to exfiltrate sensitive data from finance, accounting, procurement, legal, and payroll departments. The malware operated covertly, seeking credentials and financial information, leading to notable data exposure risks and potential regulatory disruptions for victim organizations. This campaign highlights the increasing sophistication of phishing operations leveraging disk image formats for initial access and the persistent targeting of high-value sectors with advanced infostealer malware. Financial and critical infrastructure organizations face heightened pressure to improve detection and segmentation as threat actors continually refine their social engineering tactics.
Kill Chain