ConnectWise ScreenConnect Tops List of Abused RATs in 2025 Attacks

A new report from Cofense Intelligence reveals a troubling trend in cyberattacks: criminals are increasingly hijacking legitimate Remote Access Tools (RATs) to infiltrate computer systems. Unlike malicious software specifically designed for hacking, these tools are built for lawful purposes, often used by IT professionals in companies. Their genuine nature makes them particularly dangerous, as they can bypass traditional security measures and user suspicion.

Threat actors are leveraging the inherent trust in these tools to gain access to victim machines, researchers noted in the blog post shared with Hackread.com. Once installed, these legitimate RATs become a gateway for delivering further harmful programs, spying on user activities, or stealing sensitive information like passwords and confidential business records. The versatility of these tools, combined with their appearance of being trustworthy software, makes them a potent weapon in the hands of cybercriminals.

Cofense Intelligence highlighted several frequently abused legitimate RATs. ConnectWise ScreenConnect, previously known as ConnectWise Control and ScreenConnect, emerged as the most popular choice for attackers in 2024, appearing in 56% of active threat reports involving legitimate RATs.

“ConnectWise RAT is the most popularly abused legitimate remote access tool and accounted for 56% of all active threat reports (ATRs) with legitimate remote access tools in 2024,” wrote Kahng An from Cofense’s Intelligence Team in their report.

Its popularity is surging further in 2025, with current attack volumes already matching those seen throughout last year. Another tool, FleetDeck, saw a surge in use during the summer of 2024, particularly targeting German and French speakers with finance-themed lures.

Attackers employ various methods to trick victims into installing these tools. For ConnectWise ScreenConnect, notable campaigns include spoofing the US Social Security Administration with emails falsely claiming to offer updated benefit statements.

These emails often contain links to fake PDF files or directly to the RAT installer. Another tactic observed since February 5, 2025, involves emails pretending to be notifications about shared files on “filesfm,” leading victims to download a seemingly legitimate OneDrive client that is, in fact, the ConnectWise RAT installer.

According to Cofense, other legitimate RATs are also being exploited. Atera, a comprehensive remote monitoring and management suite that integrates with tools like Splashtop, has been used in campaigns targeting Portuguese speakers in Brazil with fake legal notices and invoices since October 2024.

Smaller, less common RATs like LogMeIn Resolve (GoTo RAT), Gooxion RAT, PDQ Connect, Mesh Agent, N-Able, and Teramind have also been observed in various, often localized, campaigns.

The ease and low cost of acquiring these tools allow attackers to quickly switch between different ones, posing a continuous challenge for cybersecurity protection, Cofense researchers concluded, adding that such campaigns are typically one-off events that are hard to sustain.

“These campaigns are generally one-off events and do not appear to be sustained over time. It is possible that the threat actors quickly pivot between different RATs because of the overall large number of different options that are available on the market.”