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Questions tagged [malware]

Malware, short for malicious software, is software designed to disrupt computer operation, gather sensitive information, or gain unauthorized access to computer systems.

12
votes
5answers
24k views

Are auto-downloaded malicious .dmg app files a security risk if they are never opened?

I visited a page to stream a TV show, and upon clicking the search result link got the following pop-up: I clicked OK, as nothing on Chrome was available, and when I did that, Chrome auto-downloaded ...
9
votes
2answers
9k views

How can I circumvent XProtect and re-enable Java Applets?

So, Apple has again updated their XProtect malware definitions to block Java Applets. Unfortunately, my wife's employer's VPN requires an Applet to be run in order to fully establish connectivity. She ...
34
votes
5answers
3k views

Is my Mac infected with the Flashback trojan?

I own a 2011 model of MacBook Pro with a Core i7 processor and Snow Leopard. I have found out there is a trojan horse which now controls 600,000 Macs. How can I find out if my MacBook is being ...
10
votes
1answer
627 views

Suspected adware infection of Mac

I have an Early 2015 MacBook Pro running OS X 10.11.6 (the latest version of El Capitan) that as of late had started randomly opening a website with the link fastlauncher.xyz [Thanks John Ramos: ...
22
votes
7answers
2k views

How to limit my Mac's exposure to malware?

With OS X malware increasingly in the news (see the Flashback Trojan issue), is there anything that I should do to increase the security of my Mac and reduce my exposure to malware? What I'm doing ...
2
votes
1answer
356 views

Could downloading Tumblr videos damage/infect Mac?

I have downloaded quite some Tumblr videos, both cat videos, funny clips, porn. I downloaded them manually, you can save them with right click and save-as with right method - no download program used. ...
1
vote
2answers
140 views

Does my Air have malware if windows pop up when I click on any link?

Every time I click to open a link, other windows start opening. They all want to sell me Detox your Mac or have warnings about how my Mac is at risk or infected. How can I check for malware?
63
votes
3answers
736k views

Is the message “You must change your passcode within 60 minutes” valid / non-malware?

A few minutes ago, after unlocking my phone (iPhone 4, iOS 7.0.1) I got a dialog over the home screen: Passcode Requirement You must change your passcode within 60 minutes and it offered to ...
9
votes
8answers
23k views

Random shutter sound

Every once in a while I hear a loud sound from my Mac. It sounds like either a camera shutter or a keychain lock/unlock. It all started a couple of weeks ago. I fear something is snapping shots of my ...
7
votes
4answers
5k views

MacBook Pro camera and microphone used by malware?

Given the increasing number of reports about malware for Apple computers, I am concerned by the fact that there's no simple way to physically block the camera while I'm using my MacBook Pro. Is it ...
6
votes
3answers
238 views

Avoiding malware in recommendations?

Occasionally, answers on this site include software recommendations. Let’s assume a "legitimate developer" pretends to have created a useful application that is (secretly) capable of doing harm. How ...
4
votes
2answers
779 views

Flashback malware on Snow Leopard

My Mac OSX Snow Leopard got exploited by the Flashback malware. There's a summary by F-Secure that I'm trying to follow in order to remove it. This link is similar, and provides a little more detail. ...
1
vote
2answers
492 views

My OS closes down after 5 seconds of inactivity (with the alert pop-up)

Since yesterday, when i'm running my computer, it shutDowns after 5 seconds of running. In order to make it work, i need to press continuously the escape key so the popUp alert who close the computer ...
6
votes
1answer
584 views

What is com.appstart.AppStart?

Browsing my launch daemons/agents with LaunchControl today, I noticed this funny-looking user agent with the label "com.appstart.AppStart": "/Users/jstrout/Library/Application Support/AppPolicy/...
6
votes
3answers
13k views

How do I tell if the Flash Player Installer is a virus?

There's been a couple of trojans recently that imitate the Adobe Flash Player installer one of which is called OSX/flashback.A. (More info here) I've been wary of updating Adobe Flash Player due to ...
5
votes
1answer
894 views

Sudden flash of gray in the background

In the last few days I've had a sudden flash of gray in the background. I'm on MacOS 10.7.5. I'm not able to provide a screenshot because it only happens for a split second, but here is a more or less ...
4
votes
4answers
4k views

How to remove Malwarebytes from Mac?

I would like to remove Malwarebytes from a friend's macbook. There is nothing in Applications Folder /Library/LaunchAgents (or in /System/Library/LaunchAgents) /Library/LaunchDaemons /Library/...
4
votes
1answer
444 views

Uninstalling Genieo broke my system

Update below, the rest is more or less background information. After discovering a Genieo install, I vaguely recalled it being, well, not trustworthy. After a quick search I knew I wanted to ...
1
vote
0answers
30 views

how to prevent these alerts from appearing on my calendar [duplicate]

My email address was sold a while ago so I get a lot of junk mail. I try to delete it and unsubscribe but some of it remains. Recently, messages such as the image below have started appearing on my ...
0
votes
2answers
363 views

Identify why I get a connection to ransomware server

I received some waring that my 'PC' might be infected because it supposedly tried to connect to two ransomware server: http://45.33.9.234/ http://79.170.40.167/ In practice I have a MBP with MacOS ...
0
votes
1answer
80 views

Sluggish 2013 21.5" El Capitan iMac

My second hand 2013 iMac has been running really slowly. I have already done a complete wipe and reinstall, but that didn't help. trying to get to the bottom of this, and suspecting imminent HDD ...
-2
votes
1answer
96 views

Red and blinking areas on Mac

I have MacBook Air, 13 inches, macOS Sierra. Version 10.12.5 Sometimes when I put mouse over or click on some text - the area where mouse pointing getting red, sometimes this red area is getting ...