May 05, 2017  Windows 'Snake' Malware Ported to Mac, Imitates Adobe Flash Player Installer Friday May 5, 2017 1:07 pm PDT by Juli Clover Well-known Windows backdoor malware 'Snake' has been ported to.

1. Flash Player Virus
2. Adobe Flash Player Update Virus Removal
3. Adobe Flash Player Dmg Virus Mac
4. Flash Player Dmg Virus Mac

A decade-old Windows malware trojan wormed its way into the macOS ecosystem, complete with a signed (likely stolen) Apple developer certificate. The exploit appears as an Adobe Flash Player installer. Once permission is granted, it hides itself deep inside macOS folders. Its certificate has already been revoked by Apple, but it's good to be aware of your enemies.

According to Fox-IT, Snake, a malware framework that has been infecting Windows software since 2008, and more recently Linux, is now targeting Mac.

Now, Fox-IT has identified a version of Snake targeting Mac OS X.As this version contains debug functionalities and was signed on February 21st, 2017 it is likely that the OS X version of Snake is not yet operational.Fox-IT expects that the attackers using Snake will soon use the Mac OS X variant on targets.

Snakes are dangerous and here's why

Similar to the Dok trojan that we heard about earlier this week, Snake popped up with an authenticated developer certificate, which means the Mac's built-in security system, Gatekeeper, would consider it legit and allow the installation process to complete.

It's important to note that Apple has already revoked this fake or stolen developer certificate, so Gatekeeper will block it. However, there is still a slight chance of someone downloading Snake by accident if they've found it through dubious channels. Malwarebytes explains:

Fortunately, Apple revoked the certificate very quickly, so this particular installer is no further danger unless the user is tricked into downloading it via a method that doesn't mark it with a quarantine flag (such as via most torrent apps).

How Snake slithers into your Mac

Just like most malware attacks, Snake doesn't just magically appear on your Mac one day. There isn't someone shooting corrupted files through your ethernet cable directly into your software. Snake has to be welcomed into your operating system by you.

Think of it is a vampire. If you don't invite it into your home, it can't attack you.

The file, named Install Adobe Flash Player.app.zip, will appear to be an Adobe Flash installer (Say what you will about Flash, but there are still a lot of people that have to use it for school or work). From Malwarebytes:

If the app is opened, it will immediately ask for an admin user password, which is typical behavior for a real Flash installer. If such a password is provided, the behavior continues to be consistent with the real thing.

Interestingly, once the installation is complete, Flash is actually installed on the Mac, making it even more difficult to tell that it's a trojan.

How you can protect yourself against Snake

As noted above, the fake/stolen developer certificate that allowed Snake to get a pass from Gatekeeper has already been revoked, so it's likely that, even if you download the zip file and try to open the app, your built-in security program will say, 'Nope Dope!'

But to refresh best practices, if you receive an email with an attachment at all, do some due diligence to make sure it's from a legitimate source. Check the sender address to make sure it is from an address you recognize. Click on the sender's name to view the email address it was sent from to make sure it's not a spoofed email. If you're still unsure, confirm with the sender by texting, calling or sending a separate email asking if the attachment is legit.

Specific to the Snake trojan, avoid downloading any zip files with the name Install Adobe Flash Player.app.zip.

What to do if Snake already bit you

Do you like my snake puns?

If you think you might have managed to accidentally install the Snake trojan onto your Mac, you can find and delete the following files:

• /Library/LaunchDaemons/com.adobe.update.plist
• /Library/Scripts/installd.sh
• /Library/Scripts/queue
• /var/tmp/.ur-*
• /tmp/.gdm-socket
• /tmp/.gdm-selinux

Next, delete the stolen/fake signed Apple Developer certificate.

Flash Player Virus

1. Launch Finder.
2. Select Applications.
3. Open your Utilities folder.
4. Double-click on Keychain Access.
5. Select the certificate named Adobe Flash Player installer with the signed certificate issued to Addy Symonds.
6. Right or Control + click on the Certificate.
7. Select Delete Certificate from the drop down options.
8. Select Delete to confirm that you want to delete the certificate.

Lastly, change your administrator password to ensure that you're backdoor is rekeyed so the hackers can't get back in.

Remember best practices for staying safe

It is unlikely, at this point, that Snake will slither through your Mac's backdoor. For one, Apple has revoked the certificate, which makes it nearly impossible to make it through the installation process without you knowing about it.

To reiterate, don't open attachments from unknown sources. Double check the sender email address to make sure it is not spoofed. Don't open suspicious-looking files or give administrator permission to unknown programs. You can protect yourself from attacks if you stay safe.

If you do end up with malware on your Mac, take a moment to relax and know that everything will be O.K. You can remove malware on your own, but if it seems too difficult for you to tackle, you can talk to Apple support. Someone will be able to help you.

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Learn how to remove fake Adobe Flash Player update virus from Mac and thereby prevent the browser from being redirected to rogue software installation websites.

Update: March 2020

The Adobe Flash Player update virus is one of the common ways cybercriminals try to deposit additional harmful code onto a Mac. It usually operates in tandem with such threats as bogus system utilities that report non-existent problems and thus attempt to manipulate users into activating the licensed copy of the scareware. This type of a ruse can be used to promote such unwanted apps as Mac Auto Fixer, Mac Cleanup Pro or Easy Mac Care. These opportunistic infections will run phony scans of the host system and claim to detect hundreds of issues – ones that aren’t there for real. The targeted Mac users therefore deal with a double contamination scenario, where they first encounter recurrent and really annoying instances of browser rerouting and then suffer the consequences of counterfeit software activity. It’s the early stage of the brainwashing that is backed by the Adobe Flash Player update virus popups.

The reason why the architects of this trickery have added the Flash Player to the mix of their shenanigans is probably because it’s a commonly used program trusted by most users. The caveat is that a completely different piece of code is camouflaged as the explicitly stated software. This part of the incursion is usually isolated to the web browser, although there are rare cases where the misguiding popups appear when the browser is closed. The virus manifests itself through random redirects to a site that instantly displays a popup alert saying:

'Adobe Flash Player' is out of date
To continue using “Adobe Flash Player”, download an updated version.

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Meanwhile, a prompt at the top of the page layout may wrongfully emphasize that “Latest version of Adobe Flash Player is required to encode and/or decode (Play) audio files in high quality”. Everybody likes quality multimedia content, so a lot of users end up falling for this trick.

In all of these adverse situations, those who pay attention to detail will notice that there is something wrong with such a recommendation. First off, the URL of the website that generates these Adobe Flash Player update popups is a giveaway. Obviously, it has nothing to do with the genuine vendor, being clearly designed to mimic the legit update workflow. Furthermore, despite the fact that the alerts may provide a button to opt out, such as “Later” or “Cancel”, clicking it isn’t likely to close the dialogs for more than a few milliseconds. The pre-configured website script will relaunch the ads, so the victims may have to force quit Safari, Chrome, Firefox – or whatever browser is infected – to get the bogus notifications out of the way.

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A few examples of the spoofed promo pages massively reported by victims are deej.almeusciu.site, upgradecircle.findgreatsourceforupgrade.info and afew.zoyufo.pw. The list of these malware serving domains is constantly expanding as old ones are being knocked offline in response to victims’ complaints or blacklisting on the browser end. Incidentally, the above-mentioned scam sites splashed onto the scene amidst a spike in the fake Flash Player update hoax in March 2020, which co-occurred with a very unsettling trend. Numerous Mac users claim to be redirected to these malware-riddled pages when on reputable resources with huge user audiences, including CNN and NY Times news outlets. One of the theories why this could be happening is that the criminals may have somehow injected malicious scripts into a number of popular websites so that the visitors end up being forwarded to unwanted landing pages.

A whole new attack mechanism with the fake Adobe Flash Player update popups at its core is distributing an emerging Mac threat codenamed Tarmac. Also known as OSX/Tarmac, this infection relies on another type of harmful code called Trojan:OSX/Shlayer. The latter is a notorious Mac Trojan whose objective is to set large-scale malvertising schemes in motion. Its original entry point is a phony alert about an out-of-date version of the Flash Player. Once inside, it reaches out to the Command and Control server and downloads a copy of Tarmac onto the host. The second-stage malware is code signed and leverages RSA encryption to camouflage the fishy gist of its payload, which allows the pest to fly below the radar of quarantine-aware software running on the Mac. As soon as OSX/Tarmac is launched, it attempts to elevate its privileges on the machine by generating a dialog that says, “Play wants to make changes”.

This popup asks for the administrator’s username and password, making it look like the request comes from Adobe Flash Player. Even if the victim is prudent enough to refrain from entering the credentials, Tarmac continues to run with fairly high permissions. Just like Shlayer, it can easily connect to its C&C server and download arbitrary code from it, such as rogue system utilities, adware, or even Mac ransomware. This recently discovered tandem of dangerous programs relying on counterfeit Flash Player update ads demonstrates that the campaign is evolving and assuming more unsettling characteristics.

In January 2020, security analysts unveiled some eyebrow-raising details about the scope of Shlayer wave that piggybacks on rogue Flash Player update popups. According to these findings, one of this Trojan’s iterations was the top Mac threat picked up by a popular antimalware solution last year. Aside from well-orchestrated social engineering trickery, its domination stems from the fact that the operators of this scam have been actively recruiting YouTube channel owners, Wikipedia writers, and bloggers with large subscriber audiences to post ads leading to the malware-riddled downloads. There is also a hefty number of malicious sites created specifically to spread the plague. Some of these trojanized links posted on various legit web outlets lead to domains that expired recently, and it appears that the crooks have bought and repurposed them to serve up the infection. As a result, Mac users who are looking up some trending terms on search engines, such as a new TV show episode or a live stream of a sports event, run the risk of visiting the wrong page that hosts the shady installer.

This troublemaking scenario tends to be bolstered by a malicious browser plugin or extension. The fake helper object modifies Internet settings, such as the homepage or search defaults, and may even interfere with the DNS server preset. This is what causes the redirects in the first place. What happens if you click “OK” and actually download the pseudo Adobe Flash Player update is a whole new attack layer. The affiliated harmful program will establish persistence on the Mac by adding itself to Login Items and utilizing antivirus evasion mechanisms. Then, it will start launching scans of the macOS, purporting to find numerous memory issues and security problems each time. Again, this routine is aimed at pressuring the victim into making a hasty decision to pay for the cyber-impostor’s licensed version. So much for the tactic. Speaking of the fix for the Adobe Flash Player update virus activity, the only method is to spot the components of the pest on the Mac and remove them. See below to learn how it’s done.

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Fake Adobe Flash Player update virus manual removal for Mac

The steps listed below will walk you through the removal of this malicious application. Be sure to follow the instructions in the order specified.

Adobe Flash Player Update Virus Removal

• Open up the Utilities folder as shown below
• Locate the Activity Monitor icon on the screen and double-click on it
• Under Activity Monitor, find an entry that appears suspicious and shouldn’t be among the running processes, select it and click Quit Process
• A dialog should pop up, asking if you are sure you would like to quit the troublemaking process. Select the Force Quit option
• Click the Go button again, but this time select Applications on the list. Find the malicious entry on the interface, right-click on it and select Move to Trash. If user password is required, go ahead and enter it
• Now go to Apple Menu and pick the System Preferences option
• Select Accounts and click the Login Items button. The system will come up with the list of the items that launch when the computer is started up. Locate the likely culprit that doesn’t belong there and click on the “-“ button

Get rid of fake Adobe Flash Player update popups in web browser on Mac

To begin with, settings for the web browser that got hit by the Adobe Flash Player update Mac virus should be restored to their default values. The overview of steps for this procedure is as follows:

1. Reset Safari
   • Open the browser and go to Safari menu. Select Preferences in the drop-down list
   • Once the Preferences screen appears, hit the Privacy tab at the top. Find the option that says Remove All Website Data and click on it
   • The system will display a confirmation dialog that also includes a brief description of what the reset does. Specifically, you may be logged out of some services and encounter other changes of website behavior after the procedure. If you’re okay with that, go ahead and click the Remove Now button
   • In order to selectively clear data generated by certain websites only, not all of them, hit the Details button under the Privacy section of Safari Preferences
   • This feature will list all websites that have stored potentially sensitive data, including cache and cookies. Select the one, or ones, that might be causing trouble and click the appropriate button at the bottom (Remove or Remove All). Click the Done button to exit.
2. Reset Google Chrome
   • Open Chrome, click the More (⁝) icon in the top right-hand part of the window, and select Settings in the drop-down
   • When on the Settings pane, select Advanced
   • Scroll down to the Reset settings section. Under the Restore settings to their original defaults option, click the Reset settings button
   • Confirm the Chrome reset on a dialog that will pop up. When the procedure is completed, relaunch the browser and check it for malware activity.
3. Reset Mozilla Firefox
   • Open Firefox and select Help – Troubleshooting Information
   • On the page that opened, click the Reset Firefox button

Get rid of Adobe Flash Player update virus using Combo Cleaner removal tool

The Mac maintenance and security app called Combo Cleaner is a one-stop tool to detect and remove Fake Adobe Flash Player Update virus. This technique has substantial benefits over manual cleanup, because the utility gets hourly virus definition updates and can accurately spot even the newest Mac infections.

Furthermore, the automatic solution will find the core files of the malware deep down the system structure, which might otherwise be a challenge to locate. Here’s a walkthrough to sort out the Fake Adobe Flash Player Update issue using Combo Cleaner:

1. Download Combo Cleaner installer. When done, double-click the combocleaner.dmg file and follow the prompts to install the tool onto your Mac.

   By downloading any applications recommended on this website you agree to our Terms and Conditions and Privacy Policy. The free scanner checks whether your Mac is infected. To get rid of malware, you need to purchase the Premium version of Combo Cleaner.

2. Open the app from your Launchpad and let it run the update of malware signature database to make sure it can identify the latest threats.
3. Click the Start Combo Scan button to check your Mac for malicious activity as well as performance issues.
4. Examine the scan results. If the report says “No Threats”, then you are on the right track with the manual cleaning and can safely proceed to tidy up the web browser that may continue to act up due to the after-effects of the malware attack (see instructions above).
5. In case Combo Cleaner has detected malicious code, click the Remove Selected Items button and have the utility remove Fake Adobe Flash Player Update threat along with any other viruses, PUPs (potentially unwanted programs), or junk files that don’t belong on your Mac.
6. Once you have made doubly sure that the malicious app is uninstalled, the browser-level troubleshooting might still be on your to-do list. If your preferred browser is affected, resort to the previous section of this tutorial to revert to hassle-free web surfing.

FAQ

Whereas Adobe Flash Player is useful software that enhances your online experience in plenty of ways, it can as well be a source of vulnerabilities exposing your Mac to cyber-attacks. Furthermore, many users simply don’t catch up with the frequent patches rolled out by the publisher, inadvertently turning their computers into low-hanging fruit.

It comes as no surprise that many users end up disabling the Flash plugin in their web browser at some point. This tool can be safely turned off at the browser level without the need to uninstall it from a Mac altogether. Here is how to disable it in popular browsers:

• In Safari menu bar, select Preferences
• Select the Security tab, spot the Internet Plug-ins area, and click Plug-in Settings
• Remove the checkmark next to Adobe Flash Player in the subsequent screen
• Click Done

• Type chrome://settings/content in Chrome’s URL bar
• Scroll down and find the Flash entry on the page. Click it
• Spot the Allow sites to run Flash option and toggle it off using the adjacent slider

• Type about:addons in the URL bar and hit Enter
• Select Plugins in the left-hand navigation bar
• Find the Flash Player plugin and expand the appropriate menu
• Choose between Ask to Activate and Never Activate options. The latter is preferable if you don’t want to see annoying popup dialogs during web surfing.

In case the regular Flash Player update popups are interrupting your activities, there is a way to get them out of sight. Be advised that by clicking the Remind Me Later button on these notifications you simply postpone the process, and the irritating message will reappear in an hour. Here’s how to prevent these messages from appearing on your Mac for good:

• Go to the Finder and select System Preferences
• Click the Flash Player icon
• When on the Flash Player screen, hit the Updates tab in its upper part
• You will see the following options to choose from: Allow Adobe to install updates, Notify me to install updates, and Never check for updates
• Enable a radio button next to the Never check for updates option. You can alternatively allow Adobe to install updates – in that case, Flash Player will be updated on its own without producing any popups

If a malicious app is already on board your system, then a macOS update isn’t likely to fix the problem. That being said, updating your Mac does address known security vulnerabilities so that you are protected against common exploits and mainstream viruses further on. Another benefit of applying the updates as soon as they are available is that your Mac will be optimized to ensure smooth performance. Keep in mind that human error might undermine the built-in Mac defenses no matter how top-notch they are.

Adobe Flash Player Dmg Virus Mac

No, you can’t – as long as you diligently keep Flash Player up to date and all the new versions are installed from the official source. In a vast majority of incidents where this utility is exploited to deposit malware onto Macs, the victims neglect the update hygiene and use very old versions of the product with multiple unpatched security loopholes in them.

Flash Player Dmg Virus Mac

Flash updates pushed via popup alerts on rogue websites are a completely different story. The installation clients in this case include bundled malware. If you happen to opt for this kind of an offer, a contamination is pretty much inevitable. The article above highlights the common infection scenarios through fake Adobe Flash Player update notifications. Note that Mac users are typically redirected to these landing pages because their browsers have been hijacked. Therefore, removal of the underlying virus is a prerequisite of addressing the predicament.