Palo Alto Unit 42 are tracking an increasingly widespread malvertising campaign targeting macOS. This campaign appears to be the next stage of a previous campaign known as JSCoreRunner, which was first identified in August 2025. In recent months, the financially-motivated attackers behind these campaigns transitioned from delivering standard adware, to delivering adware with full backdoor capabilities. Palo Alto Unit 42 designate this campaign Operation FlutterBridge, and calls the payload that it delivers FlutterShell.
Read more…
Source: Palo Alto Unit 42
Sign up for the Cyber Security Review Newsletter
The latest cyber security news and insights delivered right to your inbox
Related:
- Storm-0501’s evolving techniques lead to cloud-based ransomware
August 29, 2025
Microsoft Threat Intelligence has observed financially motivated threat actor Storm-0501 continuously evolving their campaigns to achieve sharpened focus on cloud-based tactics, techniques, and procedures (TTPs). While the threat actor has been known for targeting hybrid cloud environments, their primary objective has shifted from deploying on-premises endpoint ransomware to using cloud-based ransomware tactics. Unlike traditional on-premises ransomware, ...
- WhatsApp fixes ‘zero-click’ bug used to hack Apple users with spyware
August 29, 2025
WhatsApp said on Friday that it fixed a security bug in its iOS and Mac apps that was being used to stealthily hack into the Apple devices of “specific targeted users.” The Meta-owned messaging app giant said in its security advisory that it fixed the vulnerability, known officially as CVE-2025-55177, which was used alongside a separate ...
- How attackers adapt to built-in macOS protection
August 29, 2025
If a system is popular with users, you can bet it’s just as popular with cybercriminals. Although Windows still dominates, second place belongs to macOS. And this makes it a viable target for attackers. With various built-in protection mechanisms, macOS generally provides a pretty much end-to-end security for the end user. This post looks at how ...
- Free webinar exploring the future of cyber security in critical industries
August 28, 2025
On 5 September 2025, cyber security professionals and industry leaders will gather online for a free, expert-led webinar: “Securing systems, data, and people: What are cyber security experts’ concerns for the future?”. This session serves as a precursor to the IET’s Cyber Security for Critical Industries Conference 2025, offering attendees a valuable glimpse into the ...
- TAOTH Campaign Exploits End-of-Support Software to Target Traditional Chinese Users and Dissidents
August 28, 2025
In June, Terend Micro researchers identified and investigated an unusual security incident involving the installation of two malware families, C6DOOR and GTELAM, on a victim’s host. Trend Micro investigation determined that the malware was delivered through a legitimate input method editor (IME) software, Sogou Zhuyin. As brief explanation, an IME is a tool that interprets sequences ...
- Widespread Data Theft Targets Salesforce Instances via Salesloft Drift
August 28, 2025
Based on new information identified by GTIG, the scope of this compromise is not exclusive to the Salesforce integration with Salesloft Drift and impacts other integrations. GTIG now advise all Salesloft Drift customers to treat any and all authentication tokens stored in or connected to the Drift platform as potentially compromised. On August 28, 2025, GTIG ...