On Monday, we wrote about a variant of the Mac Flashback trojan that exploits a then unpatched Java vulnerability (CVE-2012-0507). Apple released its security update on Tuesday. If you have Java installed on your Mac — update now.
Yesterday, Dr. Web (a Russian based antivirus vendor) reported that Flashback may have infected over half-a-million Macs.
Each installation of Flashback creates a unique User-Agent. Dr. Web's Ivan Sorokin later estimated that their sinkhole now estimates over 600,000 infections.
, at this moment botnet Flashback over 600k, include 274 bots from Cupertino and special for you Mikko - 285 from Finland
— Sorokin Ivan (@hexminer) April 4, 2012
Our Anti-Virus for Mac detects the latest Flashback variant as Trojan-Downloader:OSX/Flashback.K.
Here's some of our recent Flashback descriptions:
Our previous Mac related posts include instructions on how to disable Java, how to check for a Flashback infection, and manual removal:
• Mac Malware at the Moment
• Are you having a (Mac) Flashback?
• Mac Flashback Exploiting Unpatched Java Vulnerability
For those of you celebrating the Easter Holiday this weekend — if you're visiting your parents and they have a Mac — now is the time to update, disable, or remove their Java client plugin/installation!
(And that goes for Windows too.)
Updated to add: We have shipped a free Flashback removal tool On 05/04/12 At 02:44 PM
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