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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.

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 ...
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 ...
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 ...
13
votes
4answers
3k views

Full screen ad on iPhone in place of lock screen

I own an iPhone 3GS and use it as personal hotspot for my MacBook Pro via USB. The iPhone is running iOS 5.1.1, and the MacBook is running a Mountain Lion preview. However the question is not ...
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 ...
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: ...
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 ...
9
votes
4answers
1k views

Paste stops working (“CFPasteboardRef: Lock timeout”)

Pasting from the clipboard stopped working on my Mac. Nothing is pasted, and the following line appears many time in syslog. Apr 5 **:**:** *** com.apple.WebKit.WebContent[6583] <Warning>: ...
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 ...
8
votes
2answers
904 views

Prevent Spam Downloads on Safari

Background A new spam page has started to appear throughout many "questionable" sites (movie sites, etc.). This new spam page fits in to the category of fake scans, MacKeeper, "YOU HAVE A VIRUS", etc....
8
votes
3answers
2k views

HP Product Research on Activity Log

I'm seeing an item on my activity monitor called 'HP Product Research.' I assume it's associated with some HP Printer drivers that I no long need, and have have removed, but this tracker keeps ...
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 ...
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 ...
6
votes
1answer
292 views

How can I alert Apple about spyware targetting Apple users?

I got a pop-up on my father's iPhone stating that there was spyware on it, along with a number to call for AppleCare support. I realized I only called the number because it was listed in a pop-up and ...
6
votes
5answers
3k views

How did my Mac end up with iPhone 4S as my host name in the user prompt in OS X terminal? [duplicate]

The other day I was searching for Xcode iOS 5 tutorials. About a day or two later, I noticed my terminal prompt is now "iPhone4s : myusername". Naturally , my biggest fear is that there could be a ...
6
votes
1answer
1k views

How to securely restore new MacBook air after someone else was first admin user

I've just received my new MacBook Air. (my first Apple computer in 15 years!) Unfortunately, I had it sent to work on a day I wasn't in, and it was mistaken for the new intern's computer. He proceeded ...
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
4answers
6k views

How to get rid of booby-trapped pop ups to update flash player?

I'm coming across a malicious pop up to update my flash player. The message in the pop up: Warning! Your Adobe Flash Player version is outdated. Security risks. Please update now. I've seen this pop ...
5
votes
2answers
651 views

Logging in to main user turns off the mac

I am not a mac user, and honestly, I have no idea how to use one (besides the terminal). So, a friend asked if I could help them out with fixing their computer. She says the last thing she was on, was ...
5
votes
5answers
81k views

How do I examine my iPad for malware?

Lately I occasionally get redirected to other websites when I load some news websites. It could be a banner redirect I guess, but I suspect something more sinister. The iPad is NOT jailbroken and ...
5
votes
3answers
1k views

What does the Flashback malware do?

There was a question about removing the Flashback malware from your OS X machine, but I'm still not clear on what it does. What exactly does the Flashback malware do once it is installed on your Mac?
5
votes
3answers
6k views

How reliable and trustworthy are the Objective-See Security tools (KnockKnock (UI), Dynamic Hijack Scanner and BlockBlock)?

DHS found an issue Is this a false positive? Anybody else with the same message? I installed BlockBlock. What do you think about it? Do you trust those Security tools? BlockBlock (beta) ...
5
votes
1answer
258 views

Unexpected app “Admin Alert” running on my machine

All of a sudden I noticed an application called "Admin Alert" in my dock. This is a work computer, I'm wondering if this is some sort of "spyware" that our lovely IT department has installed on my ...
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 ...
5
votes
1answer
131 views

Is it safe to install a deprecated Java version?

I have an old version of Photoshop that requires an outdated Java runtime. "More info" takes me to this Apple support page where you can download the older JRE. Seems reasonable enough, but I am ...
5
votes
1answer
300 views

Possible keylogger? How to remove?

I'm tailing var/log/sys.log and I keep getting this message: Jul 13 23:43:52 mac[redacted lol] syslogagent[19960]: Authentication String htt[space added]p://logsviewer.com/membermac/livedesk/...
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
2answers
969 views

flashplayer.dmg is in use and can't empty Trash

I accidentally downloaded malware: something posing as Flash Player in flashplayer.dmg. I did not install it, but deleted the dmg file. Now I want to delete my trash bin, but I can't. It says: 'trash ...
4
votes
1answer
1k views

Is it possible or likely for malware or a virus to be transferred by plugging a USB hard drive into my Mac?

I am in the process of transferring data from my old MacBook Pro to a new MacBook Pro. In order to transfer some files, I decided to plug in a USB hard drive that contained a bootable partition of my ...
4
votes
2answers
3k views

What is AppSC extremely slowing down my MacBook Pro?

I noticed that my OS X very frequently runs extremely slow and everything lags. I opened up Activity Monitor and I saw that something called AppSC is using up to 95% of the memory. It makes my ...
4
votes
2answers
8k views

How can I reinstall OS X without a valid App Store connection?

I have a Mid 2009 MacBook Pro that was used by a "less than responsible" user. As such, it seems to have become infected with malware that rewrites all SSL certificates. These certificates cannot be ...
4
votes
1answer
666 views

How to recover files from the home directory that malware removed on OS X 10.10.5 Yosemite?

Two days ago, somehow, my Mac running OS X Yosemite 10.10.5 got infected by malware and it deleted almost all my files from my home directory. I have no idea how it happened (it wasn't because clicked ...
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. ...
4
votes
1answer
2k views

Run untrusted application safely through sandbox-exec command

I'm trying to run a potentially untrusted application without the following permissions, through the sandbox-exec command: file write (to avoid corruption/injection of files) network (to avoid ...
4
votes
2answers
3k views

Can I unload com.apple.mrt via launchd or otherwise remedy these errors?

I just realized that the job com.apple.mrt crashes every 10 seconds on my Mac. What exactly is the aim of com.apple.mrt? Apparently it should be a "Malware Removal Tool". Can I remove it from launchd ...
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 ...
4
votes
1answer
12k views

How do I check to see if my computer is infected with the OSX/Crisis Trojan?

Just recently, a new trojan for OS X was discovered. Apparently it only affects Snow Leopard and Lion. Whether it does/doesn't affect Mountain Lion is still unknown. The trojan sits on your computer ...
3
votes
3answers
8k views

Is DetectX itself malware?

A friend installed Mackeeper, and I tried to uninstall it with DetectX. As far as I know, DetectX is not known malware as I can only find positive comments about it. But, I'm concerned that I cannot ...
3
votes
1answer
1k views

How did “Hazel” get on my computer?

I just noticed a thing called "Hazel" has appeared in my System Preferences. I've no idea what it is or how it got there. When I googled hazel mac, it looks like it's a popular app with glowing ...
3
votes
2answers
5k views

Can .mp4 files infect my Mac with malware/adware/spyware?

Coming from Windows background, I'm usually very paranoid about the files I download, but one time I did something stupid - I downloaded some video files that were hosted in https://openload.co/ (not ...
3
votes
2answers
1k views

Is it possible to hide files from Terminal's ls?

I am saving some files because I need to reinstall OS X, and noticed oddly high numbers of files in some folders. Is it possible for malware to hide files from ls?
3
votes
2answers
4k views

Rogue calendar event

I have just had a mysterious thing happen: a calendar event has appeared out of nowhere. At more or less the same time I received a similar email: Now I am used to email spam, but how on earth has ...
3
votes
2answers
292 views

what is “translate” and why does it want access to my keychain?

I use Entourage for my email accounts but I keep getting a pop up saying "translate wants to use your confidential information stored in "[my email account]" in your keychain. Do you want to allow ...
3
votes
3answers
882 views

Did the Java 1.6.0_31 update fix the Flashback trojan problem?

Is the recent Java update of OSX (Java for OS X Lion 2012-002) to 1.6.0_31 also a bug fix for the Flashback malware? The update is described here as: Multiple vulnerabilities exist in Java 1.6....
3
votes
2answers
88 views

Suddenly, menu bar applications have blue badges

I am using a MacBook Air 13' bought in 2017, running Mojave 10.14.1 (18B75). I recently removed malware and plugins named Weknow.ac. Now, several of the application badges and indicators in the menu ...
3
votes
1answer
328 views

Time Machine backup strategy to avoid ransomware/other malware

I am trying to develop a strategy to protect a 2016 iMac against ransomware and other types of malware. I have several assumptions: An infection is going to occur when I am using it. Things such as ...
3
votes
1answer
2k views

Does FileVault protect against ransomware?

I've already asked a question about ransomware on OS X in general. But I failed to get a response regarding whether FileVault protects against it. That is what this question is about. I'm also ...
3
votes
1answer
1k views

What is “AddressBookUrlForwarder”?

Today I clicked a link on Facebook and a dialogue window gave me the message: "The link needs to be opened with an application. Send to: AddressBookUrlForwarder Upon examining the link, it had ...
3
votes
2answers
747 views

Help with a HD reformat and Mountain Lion reinstall due to unknown type of hack, Malware, etc

So, I needed to reformat the HD in my mid 2011 Mac Mini (done) and plan to reinstall Mountain Lion on it. I created an SDXC install disk to do this.  I'm curious to know if the disk2 partition with ...