Alert level

TrojanDownloader:Win32/Qaantiz.A

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Encyclopedia entry
Updated: Apr 17, 2011  |  Published: Mar 08, 2010

Aliases
  • W32/Malware.LOIA (Norman)
  • Trojan.DL.Agent.TUJQ (VirusBuster)
  • TR/Downloader.Gen (Avira)
  • DLOADER.Trojan (Dr.Web)

Alert Level (?)
Severe

Antimalware protection details
Microsoft recommends that you download the latest definitions to get protected.
Detection initially created:
Definition: 1.77.591.0
Released: Mar 08, 2010


 

Summary

TrojanDownloader:Win32/Qaantiz.A is a trojan that can download and execute files from a remote server. It may arrive in the computer as a dropped file of Exploit:Win32/Pidief.AX and with the file name "a.exe".


 

Symptoms

System changes
The following system changes may indicate the presence of this malware:
  • The presence of the following file:
    A.EXE
  • The presence of the following registry modifications:
    Added value: "Adobe_RLX"
    With data: "a.exe reader"
    To subkey: HKCU\Software\Microsoft\Windows\CurrentVersion\Run


 

Technical Information (Analysis)

TrojanDownloader:Win32/Qaantiz.A is a trojan that can download and execute files from a remote server. It may arrive in the computer as a dropped file of Exploit:Win32/Pidief.AX and with the file name "a.exe".
 
Upon execution, it ensures that it automatically runs every time Windows starts by creating the following registry entry:
 
Adds value: "Adobe_RLX"
With data: "a.exe reader"
To subkey: HKCU\Software\Microsoft\Windows\CurrentVersion\Run
 
It connects to the remote server "tiantian.ninth.biz" from where it can download and execute other files. It can also upload information about the infected computer to the remote server.
 
Analysis by Marian Radu


 

Prevention



 

Recovery

Manual removal is not recommended for this threat. To detect and remove this threat and other malicious software that may have been installed, run a full-system scan with an up-to-date antivirus product such as Microsoft Security Essentials, or the Microsoft Safety Scanner. For more information about using antivirus software, see http://www.microsoft.com/security/antivirus/av.aspx.

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