Trojan.ADH.2

10 March 2011 Trojan 2 Comments

Trojan.ADH.2 is a generic detection that was aimed to identify new malware threats without using the traditional anti-virus signatures. Trojan.ADH.2 is a malicious file or software that was intentionally morphed by authors to hide its presence from anti-virus application. The Trojan do not self-replicate but has a tendency to download addition malware from a remote computer. 

Damage Level: Low

Damage Level: Medium

Systems Affected: Windows 9x, 2000, XP, Windows Vista

Characteristics
When Trojan.ADH.2 is executed, it attempts to connect to a predefined IP Address. When successfully obtain an access, it will download and execute additional threat.

Distribution
This kind of Trojan basically spread through file-sharing networks. In most occasions, Trojan.ADH.2 author embeds the code onto legitimate executable files that are frequently downloaded from shared public server. Using a sophisticated technique, it often conceals itself from antivirus application. A Spam email message is another channel to distribute the Trojan to unspecified targets. It may arrive as an attached file that disguises as legitimate document file.

1. Temporarily Disable System Restore (Windows Me/XP). [how to]
2. Open your antivirus application and update the virus definition file. This method ensures that your antivirus program can detect even newer variants of Trojan.ADH.2

3. Start Windows in Safe Mode with Networking.
- From a power-off state, turn on the computer and press F8 on your keyboard repeatedly.
- Your computer will display Windows Advanced Boot Options menu. Please select Safe Mode with Networking.
- The system will now boot Windows and loads only necessary drivers and files.

4. Open your antivirus program and run a full system scan. After the scan, delete all infected items. If unable, better place them in quarantine. Once the scan is complete, please proceed with the next step.

Online Virus Scanner:

Another way to remove Trojan.ADH.2 without the need to install additional antivirus application is to perform a thorough scan with free online virus scanner that can be found here or on websites of legitimate anti-virus and security provider.

5. Go to Online Virus Scanner list and run a virus scan. This may require plug-ins, add-on or Activex object, please install if you want to proceed with scan.
6. After completing the necessary download, your system is now ready for online virus scanning.
7. Select an option in which you can thoroughly scan the computer to make sure that it will find and delete entirely all infections not detected on previous scan.
8. Remove or delete all detected items.
9. When scanning is finished you may now restart the computer in normal mode.