What is Troj_PoshCoder.A:
Threat Classification: Ransomware
Troj_PoshCoder.A is a ransomware trojan, just like the previous versions of this nasty infection type, it uses RSA cryptography to encrypt all your data files – .txt, .xls, .jpg etc. Troj_Poshcoder.A targets computers running Windows operating system and it was first seen in May 2014. The infection might come from various sources – infected files from various P2P networks – torrents or other file sharing applications, email attachments etc. When activated Troj_PoshCoder.A encrypts certain types of files stored on local and mounted network drives using RSA public-key cryptography, with the private key stored only on the malware’s control servers. The new thing about this ransomware is that it uses Windows PowerShell to encrypt your files, furthermore it uses 4096 bit RSA key, which is impossible to break. In order to corrupt your files quicker, Troj_PoshCoder.A will encrypt only the first 81920 bytes if the file, if it is bigger then 80k. During the encryption process, the infection leaves in every folder a file called – UNLOCKYOURFILES.html. After the encryption has been completed, Troj_PoshCoder.A displays a ransom message which offers to decrypt the data if a payment is made by a stated deadline, and threatens to delete the private key if the deadline passes. The payment should be made through either Bitcoin or a pre-paid voucher – both are untraceable payment methods. If the deadline is not met, the cybercriminals will delete the private key and your files will remain encrypted.
There are two ways to remove this infection. It is totally up to you to decide which way you want to go:
1. Automatic Removal Method (recommended for regular or novice users) using a Professional Malware Removal Software.
2. Manual Removal (recommended for PC Experts or Enthusiasts).
Automatic Troj_PoshCoder.A Removal:
We recommend using SpyHunter Malware Security Suite.
You can download and install SpyHunter to detect Troj_PoshCoder.A and remove it, by clicking the button below. Once installed, SpyHunter will automatically scan and detect all threats present on your system, but in order to use it as a removal tool, you need to purchase a subscription.
SpyHunter will automatically scan and detect all threats present on your system.
Learn more about SpyHunter (EULA). You can find Install Instructions here: (LINK) SpyHunter`s free diagnosis offers free scans and detection. You can remove the detected files, processes and registry entries manually, by yourself, or purchase the full version to perform an automatic removal and also to receive free professional help with any malware related queries by their technical support department.
Manual Troj_PoshCoder.A Removal:
!!! Please note: You can remove Troj_PoshCoder.A manually. However, you should proceed at your own risk. Any of these interventions might render your system inoperable. Therefore this manual removal method is highly recommended for PC Experts or Enthusiasts. For regular users, MalwareKillers.com recommends using SpyHunter or any other reputable security application.
1. Remove Troj_PoshCoder.A by restoring your system to a previous state.
1. Reboot your computer into Safe Mode with Command Prompt. To do this, turn your computer off and then back on and immediately when you see anything on the screen, start tapping the F8 key on your keyboard.
***For Windows 8:
If you are using Windows 8, you need to hold the Shift button and tap the F8 key repeatedly, this should boot you into the new advanced “recovery mode”, where you can choose the advanced repair options to show up. On the next screen, you will need to click on the Troubleshoot option, then select Advanced Options and select Windows Startup Settings. Click on the Restart button, and you should now be able to see the Advanced Boot Options screen.
2. Using the arrow keys on your keyboard, select the option “Safe Mode with Command Prompt” and press Enter on your keyboard.
3. When the command prompt loads up, type:
Windows XP: C:\windows\system32\restore\rstrui.exe and press Enter
Windows Vista/7/8: C:\windows\system32\rstrui.exe and press Enter
4. System Restore should initialize, and you will be displayed a list of restore points. Try using a restore point created just before the date and time before the Your-computer-has-been-locked virus has infected your computer.
When System Restore has completed its task, start your computer in Windows normal mode, you would need to perform a scan with anti-spyware software as the infection might still be on the system.