Securelist | Kaspersky’s threat research and reports

Securelist

1 min read Original article ↗

Kaspersky expert has discovered new Android malware designed to serve ads and build a proxy botnet. It’s delivered through legitimate software for DoFun head units.

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Kaspersky Security Bulletin contains statistics on various cyberthreats for the period from November 2024 to October 2025, which are based on anonymized data voluntarily provided by Kaspersky users via Kaspersky Security Network (KSN).

Reports

Our experts discovered a new CoolClient backdoor variant with a kernel-mode rootkit driver that hides malicious processes, files, and network connections from security tools and threat analysts.

Kaspersky experts break down a new Armored Likho campaign that poses as a fundraising efforts and delivers a new Still Toolkit aimed at stealing Telegram data and eavesdropping on victims.

Kaspersky researchers reveal previously undocumented malware attributed to Mirage Kitten (UNC1549, Smoke Sandstorm, Nimbus Manticore): NightLedger backdoor, ArcBridge, and BridgeHead tunneling tools.

An in-depth analysis of Umbrij, a new tool used by the ToddyCat APT group to compromise corporate email communications in Gmail. The attack targeted OAuth authorization tokens, allowing threat actors to gain access to Google services.