Cumulative updates from the Virus Lab

We released our last cumulative update at the end of this January. What are the advantages for our customers?

• Antivirus database updates are now significantly smaller. Previously, we needed to release the entire database to include all fixes. Now the database is divided into smaller segments, which allows us to release updates as small as 50 KB.
• All changes can be implemented quickly. Previously, customers often needed to wait for cumulative updates for certain types of changes in our databases. Now all changes can be implemented in our daily updates.

However, our new system of antivirus updates is available only via the Kaspersky Updater module.

Kaspersky researchers have discovered new Mirage Kitten attacks using previously undocumented malware families: NodeRabbit in Node.js and PollCat in JavaScript.

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.