New Mytob worm poses as IT administrator

New Mytob worm variant could allow hackers to remotely access an infected machine, researchers warn.

Another variant of the Mytob worm began wiggling its way into inboxes this week, enticing recipients to open an e-mail attachment that could allow a remote hacker to access and perform commands on an infected machine.

The variant, dubbed "Mytob.bi" by some security researchers, scans the hard drive of an infected machine and sends copies of itself to e-mail addresses it finds in the Windows Address Book, antivirus firm Trend Micro said Tuesday. The worm poses as a message from an IT administrator, warning recipients that their e-mail account is about to be suspended, Trend Micro said.

Possible subject headers for the worm include "*IMPORTANT* Please Validate Your Email Account" and "Notice: **Last Warning**."

The latest variant is the fourth iteration of the Mytob family of worms that were first detected in late February, Trend Micro said. It has backdoor capabilities and can open a random port, allowing a hacker to remotely access an infected machine.

The variant also prevents the infected machine from accessing several antivirus and security Web sites by redirecting the connection to a local machine, the security firm added.

While prevalence of the worm is still low, the damage potential is high, Trend Micro said. U.K. antivirus company Sophos PLC also rated the worm as a concern, due to the severe damage it could cause.

Researchers speculated that the Mytob worm family is popular with hackers because its code base is relatively easy to manipulate to create a new variant. Another version, Mytob.ar, was detected earlier this week, containing added spyware and adware elements.

Future Mytob variants could take advantage of the .ar version to reap monetary benefits from spyware, Trend Micro warned.

Internet users are advised to update their antivirus software to protect themselves from the new threats.

Join the newsletter!

Error: Please check your email address.
Rocket to Success - Your 10 Tips for Smarter ERP System Selection
Keep up with the latest tech news, reviews and previews by subscribing to the Good Gear Guide newsletter.

Scarlet Pruitt

IDG News Service
Show Comments

Cool Tech

SanDisk MicroSDXC™ for Nintendo® Switch™

Learn more >

Breitling Superocean Heritage Chronographe 44

Learn more >

Toys for Boys

Family Friendly

Panasonic 4K UHD Blu-Ray Player and Full HD Recorder with Netflix - UBT1GL-K

Learn more >

Stocking Stuffer

Razer DeathAdder Expert Ergonomic Gaming Mouse

Learn more >

Christmas Gift Guide

Click for more ›

Most Popular Reviews

Latest Articles

Resources

PCW Evaluation Team

Edwina Hargreaves

WD My Cloud Home

I would recommend this device for families and small businesses who want one safe place to store all their important digital content and a way to easily share it with friends, family, business partners, or customers.

Walid Mikhael

Brother QL-820NWB Professional Label Printer

It’s easy to set up, it’s compact and quiet when printing and to top if off, the print quality is excellent. This is hands down the best printer I’ve used for printing labels.

Ben Ramsden

Sharp PN-40TC1 Huddle Board

Brainstorming, innovation, problem solving, and negotiation have all become much more productive and valuable if people can easily collaborate in real time with minimal friction.

Sarah Ieroianni

Brother QL-820NWB Professional Label Printer

The print quality also does not disappoint, it’s clear, bold, doesn’t smudge and the text is perfectly sized.

Ratchada Dunn

Sharp PN-40TC1 Huddle Board

The Huddle Board’s built in program; Sharp Touch Viewing software allows us to easily manipulate and edit our documents (jpegs and PDFs) all at the same time on the dashboard.

George Khoury

Sharp PN-40TC1 Huddle Board

The biggest perks for me would be that it comes with easy to use and comprehensive programs that make the collaboration process a whole lot more intuitive and organic

Featured Content

Product Launch Showcase

Latest Jobs

Don’t have an account? Sign up here

Don't have an account? Sign up now

Forgot password?