Back in 2024, Kaspersky researchers gave a brief description of a complex cyberespionage campaign that we dubbed “PassiveNeuron”. This campaign involved compromising the servers of government organizations with previously unknown APT implants, named “Neursite” and “NeuralExecutor”.
However, since its discovery, the PassiveNeuron campaign has been shrouded in mystery. For instance, it remained unclear how the implants in question were deployed or what actor was behind them. After the researchers detected this campaign and prevented its spreading back in June 2024, they did not see any further malware deployments linked to PassiveNeuron for quite a long time, about six months. However, since December 2024, Kaspersky researchers have observed a new wave of infections related to PassiveNeuron, with the latest ones dating back to August 2025.
Read more…
Source: Kaspersky
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Ransomware attacks cripple government services across Dutch Caribbean islands
August 2, 2025
Several major government institutions across the Caribbean part of the Kingdom of the Netherlands were hit by cyberattacks last week, including a ransomware attack on Curaçao’s Tax and Customs Administration that temporarily disabled critical services, NOS reports. According to Curaçao’s Minister of Finance, ransomware was used in the attack on the tax authority. After the breach ...
- Arctic Wolf Observes July 2025 Uptick in Akira Ransomware Activity Targeting SonicWall SSL VPN
August 1, 2025
In late July 2025, Arctic Wolf observed an increase in ransomware activity targeting SonicWall firewall devices for initial access. In the intrusions reviewed, multiple pre-ransomware intrusions were observed within a short period of time, each involving VPN access through SonicWall SSL VPNs. While credential access through brute force, dictionary attacks, and credential stuffing have not yet ...
- Ransomware gangs are now expanding to physical threats in the real world
August 1, 2025
Ransomware gangs seem to be getting desperate when it comes to getting results, as besides encrypting and leaking data on the web, they’ve also started threatening CEOs with physical violence. Cybersecurity researchers Semperis claim over the past 12 months, in 40% of ransomware incidents, the CEOs of the affected company were also physically threatened – which ...
- Frozen in transit: Secret Blizzard’s AiTM campaign against diplomats
July 31, 2025
Microsoft Threat Intelligence has uncovered a cyberespionage campaign by the Russian state actor we track as Secret Blizzard that has been targeting embassies located in Moscow using an adversary-in-the-middle (AiTM) position to deploy their custom ApolloShadow malware. ApolloShadow has the capability to install a trusted root certificate to trick devices into trusting malicious actor-controlled sites, enabling ...
- Minnesota: St. Paul cyber attack sparks reflections, calls to action
July 31, 2025
The recent cyber attack in St. Paul has gained pretty much everyone’s attention in the government technology space. It didn’t hurt that Gov. Tim Walz deployed 13 members of the Minnesota National Guard’s Cyber Protection Unit to help fix the damage — reportedly the first time that unit has deployed inside the state in its eight ...
- Cobalt Strike Beacon delivered via GitHub and social media
July 30, 2025
n the latter half of 2024, the Russian IT industry, alongside a number of entities in other countries, experienced a notable cyberattack. The attackers employed a range of malicious techniques to trick security systems and remain undetected. To bypass detection, they delivered information about their payload via profiles on both Russian and international social media platforms, ...