Cybersecurity researchers have exposed GuardCB, a fake Russian antivirus app that hides powerful spyware. The malware, known as Android.Backdoor.916.origin, can spy on calls, texts, passwords, and even live stream audio and video from infected devices. Targeting Russian businesses, the app pretends to run virus scans while secretly exfiltrating sensitive data.
This week’s ThreatsDay Bulletin highlights rising spyware alerts, global scanning activity, and new Linux backdoor threats essential insight for defenders and SOC teams.
ClickFix campaigns scale by coaching users to “fix” access issues with copy-paste commands. After the click, actors steal Microsoft 365 tokens or credentials and, in some cases, drop PureRAT for persistence. Break the flow by enforcing admin-only app consent, requiring phishing-resistant MFA, and blocking browser-to-shell chains. Investigate mailbox rules, token reuse, and OAuth grants whenever ClickFix pages appear in referral logs.
A malicious MCP server can exfiltrate API keys and sensitive data from applications, exposing how trust in developer frameworks can be abused.
S3 leaks are preventable. This 10-step checklist blocks public reads by default, disables ACLs with Object Ownership, enforces default encryption, and logs every object access. Add VPC endpoints and Access Analyzer, then verify with CloudTrail data events. You’ll keep buckets private without breaking developer workflows.
As organisations deploy hundreds of AI agents each year, security teams face unprecedented risk. This article outlines a robust framework to govern AI at scale, align speed with control and embed security from day one.
Two British teenagers have pleaded not guilty to serious Computer Misuse Act charges over a 2024 cyberattack on Transport for London, an intrusion that disrupted digital services, exposed customer data and allegedly cost the authority about £39 million. Their case now sits at the intersection of teen cybercrime, critical-infrastructure risk and the UK’s toughest penalties for hacking.
Google filed a lawsuit in New York to disrupt “Lighthouse,” a phishing-as-a-service network behind large-scale smishing. Consequently, the case seeks injunctions, domain seizures, and damages. For defenders, the move creates detection windows as operators pivot infrastructure so tighten filters, accelerate takedowns, and harden fraud telemetry now.
Security researchers have identified a critical zero-day flaw (CVE-2025-41244) affecting VMware Tools and VMware Aria. The bug enables local privilege escalation to root, a dangerous step in potential exploitation chains. The issue lies in service discovery mechanisms built into VMware, which allow guest and management systems to interact. Attackers are abusing this trust to escalate…
A public PoC exploit tool for CVE-2025-64446 now turns FortiWeb WAF appliances into high-value RCE targets. The bug uses a relative path traversal flaw to execute administrative commands over HTTP or HTTPS, and active exploitation in the wild, CISA KEV inclusion, and GitHub tooling mean security teams must urgently patch, lock down management access, and fold FortiWeb into their broader Fortinet and perimeter compromise playbooks.