|Short Description||The threat may download malicious files onto the user PC and may obtain machine information and transfer it to the domain it has an active connection to.|
|Symptoms||Unfamiliar processes or processes carrying the same name as original ones but do not have Windows Process in their description and are not part of the Windows Processes table. Slow PC, pop-ups, redirects to unfamiliar sites, locked screen, command prompt opens up briefly and closes on startup, slow or no internet connection, antivirus software disabled, firewall disabled, hidden Task Manager Processes, installed programs without user’s consent, new objects in the %Temp% folder, one or more active connection to the IP address 18.104.22.168 when typing netstat -n in command prompt.|
|Distribution Method||Massive Spam Mail campaigns.|
|Detection tool||Download Malware Removal Tool, to See If Your System Has Been Affected By Download.Sapaviro|
A new type of downloader Trojan has begun to infect systems via email attachments, Symantec researcher report. It is going by the name Download.Sapaviro and it is a very vile threat. The Trojan can remain actively connected to the attacker’s domain and also may download all types of malware on the infected computer by opening ports that are unchecked. Security engineers recommend to disconnect immediately from the web in case you have detected this trojan or observe one of the symptoms above. Since the downloader may quickly corrupt the system with other malware, every user should take the necessary action to remove the threat from an affected PC and employ anti-malware protection.
Download.Sapaviro – How Did I Get Infected?
The Trojan is believed to redistribute mainly via massive spam mail campaigns as an attachment to the mail. One of the most often attachment files used are:
→.doc, .docx, .pdf, .txt, .xml, .jnt
And these attachments are often in combination with the trojan’s executables, which may be:
→.exe, .bat, .cmd, .reg, .lnk
Most emails that are sent out may either resemble a legitimate service or spoof letter resembling someone famous or significant. A good example is the Windows 10 Free Upgrade spam mail message.
Download.Sapaviro Trojan in Detail
Once the Trojan is executed, it has been reported that it establishes active connection to this address:
Once established connection the Trojan may collect the Machine and Operating system information and may also download the following types of malware appropriate(based on the OS):
- Ransomware (For example, CryptoWall 3.0)
- Spyware Trojan (For example, TrojanSpy.W32/Bholog )
- Worm (For example, W32.Mydoom)
- Trojan.Clicker (For example, FaceLiker)
- Rootkit (For example, Bing Redirect Virus )
The cyber threat may download the malicious files onto the %Temp% folder in Windows. Also, the program may execute various scripts that allow the executables it situates to run on start up and to make it concealed from the user and any antivirus programs. More to it than that, most executables may resemble genuine Windows processes in the Windows Task Manager to fool even experienced users. The most copied process names are:
→svchost.exe; csrss.exe; smss.exe, winlogon.exe, explorer.exe
In case you see that any of those processes exist twice in your task manager, and one of them is not described as an official Windows Process, it may be a malicious application. Of course there are some malware applications that are concealed at all from the users and this is why you need to download an external Task Manager that is not part of Windows, like one of those provided in tis Lifehacker article (hotlink http://lifehacker.com/5378494/five-best-windows-task-manager-alternatives)
How To Remove Download.Sapaviro Trojan From Your PC
In order to remove threat such as this one, one must take two important details into consideration – that the trojan supports active connection with the user at all times and the possibility that it may have downloaded all sorts of malware onto the user PC. This is why it is not advisable to just reset your PC – it will not fix the problem. One thing you can to is immediately disconnect from the internet to stop any active connections. Then you should boot it in safe mode and scan it with an advanced anti-malware program that will detect this and other malware on the user PC. Make sure to download the scanner from a safe PC and install it on yours before restarting in safe mode. For more, information on restarting into Safe Mode, make sure you check the instructions below.
Step 1: Start Your PC in Safe Mode to Remove Download.Sapaviro.
Removing Download.Sapaviro from Windows XP, Vista, 7 systems:
1. Remove all CDs and DVDs, and then Restart your PC from the “Start” menu.
– For PCs with a single operating system: Press “F8” repeatedly after the first boot screen shows up during the restart of your computer. In case the Windows logo appears on the screen, you have to repeat the same task again.
– For PCs with multiple operating systems: Тhe arrow keys will help you select the operating system you prefer to start in Safe Mode. Press “F8” just as described for a single operating system.
3. As the “Advanced Boot Options” screen appears, select the Safe Mode option you want using the arrow keys. As you make your selection, press “Enter“.
4. Log on to your computer using your administrator account
While your computer is in Safe Mode, the words “Safe Mode” will appear in all four corners of your screen.
Removing Download.Sapaviro from Windows 8, 8.1 and 10 systems:
Whilst holding down Shift button, click on Power and then click on Restart.
A menu will appear upon reboot. You should choose Safe Mode by pressing its corresponding number and the machine will restart and boot into Safe Mode so you can scan for and remove Download.Sapaviro.
Step 2: Remove Download.Sapaviro automatically by downloading an advanced anti-malware program.
To clean your computer you should download an updated anti-malware program on a safe PC and then install it on the affected computer in offline mode. After that you should boot into safe mode and scan your computer to remove all Download.Sapaviro associated objects.