Cyberattack Overview
Hackers used Snappybee malware and a Citrix security flaw to target a major European telecom network. The attack occurred in early July 2025, according to a cybersecurity report. Investigators linked the intrusion to a China-based cyber espionage group called Salt Typhoon.
This group has been active since 2019 and is known for attacking telecom firms, energy grids, and government systems. Their operations span over 80 countries, including those in Europe, North America, and the Middle East.
Attack Techniques and Entry Points
The attackers exploited a vulnerability in Citrix NetScaler Gateway to gain initial access. Once inside, they moved deeper into the network, targeting Citrix Virtual Delivery Agent hosts within the organization’s subnet.
They also used SoftEther VPN to hide their locations and maintain stealth. This allowed them to bypass normal detection methods and prolong their presence inside the system.
Snappybee Malware Explained
The Snappybee malware, also known as Deed RAT, was a central weapon in this operation. Experts believe it evolved from an older tool called ShadowPad. Snappybee is deployed using a DLL side-loading technique, which loads malicious files alongside legitimate software components.
For example, attackers disguised their malware as files related to antivirus tools. This trick helped them appear legitimate while executing harmful code. The malware communicated with external servers over HTTP and TCP to send stolen data.
Response and Containment
Cybersecurity teams detected the intrusion before it could cause major damage. However, the incident shows how Salt Typhoon continues to adapt. The group’s use of trusted software for malicious purposes makes detection harder.
Their evolving tactics challenge traditional defenses, especially those relying only on signature-based detection. Therefore, organizations must adopt proactive monitoring and behavior-based protection.
Prevention and Protection
To prevent similar breaches, companies should regularly patch software and monitor all endpoints for unusual activity. Advanced detection services can help identify stealthy intrusions in real time.
Solutions that combine AI-driven threat monitoring and automated incident response can greatly reduce risks. Continuous vulnerability assessment and network segmentation are also crucial for minimizing attack impact.
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