Researchers from F-Secure, Webroot, and Avast have uncovered Janicab.A, a new trojan that was discovered as a threat to Macs last week and Windows users on Monday, with findings being published recently.

For OS X users, Janicab.A was signed with a valid Apple Developer ID and also uses a special unicode character known as a "right-to-left override" (RLO) that is used in email malware attacks. From there, the trojan uses a YouTube page to hijack infected computers, directs them to command-and-control (C&C) servers, and then leaves the server and hides the infection by making the malware appear as a harmless PDF or DOC file.

janicab_2a_malware
Webroot writes:

After a relatively long lag period without seeing any particular new and exciting Mac malware, last week we saw the surfacing of a new and interesting method of compromising the OSX system. Malware authors have taken a new approach by altering file extensions of malicious .app packages in order to trick users into thinking they are opening relatively harmless .pdf or .doc files. Changing file extensions in Mac OSX can be tricky due to a built in security feature of the OS that detects attempts to change the extension and automatically annexes the extension of its correct file or package type.

This news comes after Apple updated security definitions to combat 'Yontoo', an adware trojan this past March, while also regularly dealing with Java-related vulnerabilities. Apple introduced Gatekeeper in OS X Mountain Lion in order to better deal with security threats, offering a way for users to restrict installation of apps to those signed by Apple-issued Developer IDs.

Top Rated Comments

whooleytoo Avatar
105 months ago
Cross-platform malware? And the Mac version was released first? Yaaaay!
Score: 20 Votes (Like | Disagree)
blackcrayon Avatar
105 months ago
If it's signed with a valid developer ID shouldn't that mean Apple should've already revoked it? Which brings up a question, if Apple revokes a developer ID because of malware, does OS X notify you that was the reason? Or do they just say it's "invalid" (in which case lots of people will still right click and open it :)

(I'm guessing the File Quarantine feature should have this added as well by now)
Score: 12 Votes (Like | Disagree)
Michael Scrip Avatar
105 months ago


But what does it actually do? :confused:

It gets an article on MacRumors

:D
Score: 10 Votes (Like | Disagree)
jeznav Avatar
105 months ago
Not all OSX users have Adobe Acrobat Reader installed. Icon FAIL.

Should've used Preview.app PDF icon instead.
Score: 8 Votes (Like | Disagree)
Parasprite Avatar
105 months ago
Malware authors have taken a new approach by altering file extensions of malicious .app packages in order to trick users into thinking they are opening relatively harmless .pdf or .doc files.

New because of the .app part maybe, but .pdf.exe is not a new approach by any means.

Also, who here uses Adobe for PDFs? (beyond filling out that one form that didn't work right in Preview for some reason)
Score: 3 Votes (Like | Disagree)
antonis Avatar
105 months ago
Still, don't get surprised if people that don't even have the adobe reader installed on their mac will still open a "pdf" that is using the acrobat icon. There are users and users.
Score: 2 Votes (Like | Disagree)

Top Stories

REC ASA CODE2016 20160601 205816 2745

Elon Musk Reportedly Demanded to Become Apple CEO as Part of Potential Tesla Acquisition [Update: Musk Denies]

Friday July 30, 2021 9:04 am PDT by
Tesla CEO Elon Musk reportedly once demanded that he be made Apple CEO in a brief discussion of a potential acquisition with Apple's current CEO, Tim Cook. The claim comes in a new book titled "Power Play: Tesla, Elon Musk and the Bet of the Century," as reviewed by The Los Angeles Times. According to the book, during a 2016 phone call between Musk and Cook that touched on the possibility of ...
General Apps Messages

Android iMessage Competitor Puts Pressure on Apple

Friday July 30, 2021 3:15 am PDT by
Google and the three major U.S. carriers, including Verizon, AT&T, and T-Mobile, will all support a new communications protocol on Android smartphones starting in 2022, a move that puts pressure on Apple to adopt a new cross-platform messaging standard and may present a challenge to iMessage. Verizon recently announced that it is planning to adopt Messages by Google as its default messaging...
a15 chip

iPhone 13 and Redesigned MacBook Pro Chip Production Hit With Gas Contamination

Friday July 30, 2021 5:44 am PDT by
The most important TSMC factory that manufactures Apple's chips destined for next-generation iPhone and Mac models has been hit by a gas contamination, according to Nikkei Asia. The factory, known as "Fab 18," is TSMC's most advanced chipmaking facility. TSMC is Apple's sole chip supplier, making all of the processors used in every Apple device with a custom silicon chip. Industry...
Apple watch series 5 new case material made of titanium 091019

Titanium Apple Watch Series 6 Models Currently Widely Unavailable

Sunday August 1, 2021 6:21 am PDT by
Models of the Apple Watch Series 6 with titanium cases part of the "Apple Watch Edition" collection is currently widely unavailable for pick-up in several of Apple's retail stores in the United States and is unavailable entirely for delivery in major markets. Noted by Bloomberg's Mark Gurman in the latest edition of his "Power On" newsletter, titanium models of the Apple Watch Series 6,...
iPhone 13 Always On Feature

iPhone 13 to Bring Over a Major Feature From the Apple Watch

Wednesday July 28, 2021 2:21 am PDT by
Apple's upcoming iPhone 13 lineup will feature an always-on display akin to the Apple Watch Series 5 and Series 6, according to recent reports. In his weekly Power On newsletter, Bloomberg journalist Mark Gurman, who often reveals accurate insights into Apple's plans, said that the iPhone 13 may feature an Apple Watch-inspired always-on mode. The Apple Watch Series 5 and Apple Watch...
apple rtp land

Apple Preparing to Occupy 200,000 Square Feet of Temporary Space Ahead of New $1 Billion North Carolina Campus

Thursday July 29, 2021 9:14 am PDT by
Back in April, Apple announced a $430 billion investment over the next five years to create more than 20,000 new jobs as the company continues to expand. One significant piece of that plan is a new engineering and research center in North Carolina where Apple will be investing over $1 billion and hiring at least 3,000 employees. Assemblage of seven properties in Research Triangle Park owned by ...
telegram

Bumper Telegram Update Enables Video Calls With Up to 1,000 Viewers

Saturday July 31, 2021 12:13 am PDT by
Telegram Messenger has received a major update to its video capabilities, including support for video calls with up to 1,000 viewers. Group video calls in Telegram allow up to 30 users to stream video from both their camera and their screen, and now a maximum of 1,000 people can tune into the broadcast. Telegram says it intends to continue increasing this limit "until all humans on Earth...
app store blue banner

Elon Musk: Apple's App Store Fees Are a 'De Facto Global Tax on the Internet'

Friday July 30, 2021 10:04 am PDT by
Tesla CEO Elon Musk took to Twitter today to criticize Apple's App Store fees in a tweet that sides with Epic in the ongoing Epic v. Apple dispute. "Epic is right," wrote Musk, before going on to call Apple's App Store fees a "de facto global tax on the Internet." Musk earlier this week made veiled comments about App Store fees, but today's statement is a much more direct criticism....
FaceID iMac REREREREMIX

Top Stories: Face ID on Future Macs, Elon Musk Criticizes Apple, and More

Saturday July 31, 2021 6:00 am PDT by
This week saw an interesting range of Apple news and rumors, including a blockbuster earnings report, rumors about next year's "iPhone 14" and Face ID coming to Macs, and more. Subscribe to the MacRumors YouTube channel for more videos. Other popular topics included Apple's crackdown on leaks, changes in the latest round of betas for iOS 15, iPadOS 15, and macOS Monterey, and several stories...
duracell battery bitter coating

Apple Says Don't Buy AirTag Replacement Batteries With Bitter Coating

Wednesday July 28, 2021 11:08 am PDT by
Since AirTags were just released earlier this year and are expected to have a year-long battery life, it may be some time yet before AirTag users need a replacement battery, but when the time comes for a refresh, Apple is warning customers not to buy batteries with a bitter coating. AirTags use coin-shaped CR2032 batteries, which happen to be a size that's easy to swallow. Some battery...