June 2001 Bugs: The Virus Top Ten

Anti-virus software developer Sophos has issued the latest edition to the monthly Virus Top Ten for the month of June according to the percentage of occurrence for each virus.

Taking over the top spot this month is I-Worm.Magistr at 22.2%, followed by I-Worm.Badtrans, moving up three notches from last month to come in at 10.9%.

Placing at numbers three, four and five respectively are Mawanella (a.k.a. VBS.VBSWG.X) at 9.6%; I-Worm.MTX (a.k.a. Apology.B) at 7.4%; and I-Worm.Hybris at 6.3%.

The second half of the Top Ten finds the Badtrans-dropped Trojan, Keylog.C, showing at number six at 4.6%; FunLove (a.k.a. Flcss) in seventh place at 2.8%; making its re-entry at number eight is I-Worm.Navidad at 2.6%; and WScript.KakWorm and a variant of the Mawanella take the ninth spot this month at 2.2%.

The remaining 29.2% is occupied by various other viruses, Trojans, and worms.

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.