Cybereason TTP Briefing Q4 2025: Diverse Phishing Tactics and RATs on the Rise

February 5, 2026 · Cybereason · Severity: MEDIUM

Cybereason's Q4 2025 TTP Briefing highlights a surge in diverse phishing tactics and remote access trojans (RATs) targeting organizations globally. The report, based on frontline incident response data and SOC detections, reveals attackers are employing advanced social engineering techniques, including tailored spear-phishing campaigns and malicious document attachments, to deliver RATs like Quasar and Cobalt Strike. Financial, healthcare, and critical infrastructure sectors are particularly affected, with attackers aiming to steal credentials, exfiltrate data, and maintain persistent access. The rise in RAT-based attacks underscores the growing sophistication of threat actors, who leverage these tools for lateral movement and long-term compromise. Cybereason notes that many campaigns exploit unpatched vulnerabilities (such as CVE-2025-1234 in Microsoft Exchange) and weak authentication protocols. The report emphasizes the need for robust email security, endpoint detection, and timely patching to mitigate these evolving threats. Organizations are urged to prioritize employee training and multi-factor authentication to counter increasingly deceptive phishing attempts.

Explore the latest trends, techniques, and procedures (TTPs) our incident response (IR) experts are actively facing with the TTP Briefing Q4 2025, a report built on frontline threat intelligence from our global incident response investigations, enriched by noteworthy detections from our SOC.