2025 Threat Landscape Reports Highlight Identity-Based Intrusions and High-Impact Ransomware Losses
Multiple 2025 retrospective threat reports describe identity compromise as the dominant initial access vector, with attackers repeatedly exploiting predictable control gaps such as weak identity security, third-party access paths, and exposed/perimeter systems. Barracuda’s Managed XDR telemetry analysis (spanning trillions of events and hundreds of thousands of alerts) reported that Microsoft 365 anomalous login and “impossible travel” detections were among the most common signals, consistent with credential theft and account takeover activity; it also noted post-compromise behavior including suspicious privilege manipulation (e.g., adding users to high-risk Windows groups). Dataminr’s 2026 Cyber Threat Landscape Report similarly characterized 2025 as a structural shift toward accelerated identity-based intrusions, citing that a significant share of intrusions leveraged valid credentials, alongside growth in infostealer malware and AI-enabled social engineering, and increased exploitation of third-party weaknesses.
The same reporting also emphasizes that while overall ransomware activity may have stabilized in volume, loss severity increased, with “mega-loss” incidents exceeding $100M and in some cases $1B, driven by multi-vector campaigns combining credential theft, data exfiltration, and disruption. Other items in the set are broader commentary rather than incident- or disclosure-driven intelligence: an opinion piece argues that the rapid expansion of AI-driven data center infrastructure raises systemic risk from ransomware, supply-chain compromise, and OT disruption, while a predictions article discusses 2026 security investment themes without tying to a specific campaign. A separate news roundup recaps multiple 2025 events (including third-party/SaaS integration compromises and other vulnerabilities) rather than providing new, single-story reporting, making it only loosely aligned with the identity-and-ransomware trend narrative.

Get ahead of threats like this
Mallory correlates global threat intelligence with your attack surface — know if you’re exposed before adversaries strike.
How this story unfolded
2 events from the most recent confirmed update back to the earliest known activity.
Barracuda telemetry report finds recurring security gaps drove 2025 intrusions
Barracuda's 2025 Managed XDR telemetry report concluded that many successful intrusions in 2025 began with familiar weaknesses such as identity compromise, third-party access, and poorly secured perimeter devices. It reported that supply-chain and third-party access featured in 66% of incidents, ransomware activity rose year over year, and attackers frequently abused legitimate remote access and RMM tools to blend in.
Dataminr report says 2025 marked a structural shift in cyber risk
Dataminr's 2026 Cyber Threat Landscape Report characterized 2025 as a turning point in cyber risk, citing a 225% increase in average monthly threat actor alerts versus 2024, more than 18,000 ransomware alerts, and over 2 million domain impersonation incidents. The report said identity became the primary attack surface, with nearly 30% of intrusions using valid credentials and more systemic multi-vector attacks driving larger losses.
Related entities
Vulnerabilities, threat actors, malware, products, organizations, and breaches Mallory has linked to this story.
Sources
2 references tracked. Mallory keeps watching after this page renders.
See the full picture, correlated to your attack surface.
Map indicators from this story to your assets and identify affected systems in minutes.
Every observed campaign, victim, and pivot linked to actors named in this story.
Malware, exploits, and IOCs connected to the activity described here.
YARA, Sigma, and Snort rules deployed to your SIEM as soon as they’re published.
Get matching new stories delivered to your team as they break — not the next morning.
Ask questions about this story and take action on the answers.


