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You have been re-routed to the Backdoor:Win32/Dokstormac.A write up because Backdoor%3aWin32%2fDokstormac.A has been renamed to Backdoor:Win32/Dokstormac.A
 

Backdoor:Win32/Dokstormac.A


Backdoor:Win32/Dokstormac.A is a trojan that allows unauthorized access and control of an affected computer.


What to do now

To detect and remove this threat and other malicious software that may have been installed in your computer, run a full-system scan with an up-to-date antivirus product such as the following: For more information about using antivirus software, see http://www.microsoft.com/windows/antivirus-partners/.

Threat behavior

Backdoor:Win32/Dokstormac.A is a trojan that allows unauthorized access and control of an affected computer.
Installation
When executed, Backdoor:Win32/Dokstormac.A copies itself to c:\documents and settings\administrator\application data\arcomdir\arcom.exe.

The malware modifies the following registry entries to ensure that its copy executes at each Windows start:

Adds value: "arcomstart"
With data: "c:\documents and settings\administrator\application data\arcomdir\arcom.exe"
To subkey: HKCU\Software\Microsoft\windows\currentversion\run
Payload
Allows backdoor access and control
Backdoor:Win32/Dokstormac.A allows unauthorized access and control of an affected computer. An attacker can perform any number of different actions on an affected computer using Backdoor:Win32/Dokstormac.A. This could include, but is not limited to, the following actions:

  • Download and execute arbitrary files
  • Upload files
  • Spread to other computers using various methods of propagation
  • Log keystrokes or steal sensitive data
  • Modify system settings
  • Run or terminate applications
  • Delete files

This malware description was produced and published using our automated analysis system's examination of file SHA1 293a1dd3d1133a629c4a5460409adcf65487c85f.

Symptoms

System changes
The following system changes may indicate the presence of this malware:

  • The presence of the following files:

  • c:\documents and settings\administrator\application data\arcomdir\arcom.exe

  • The presence of the following registry modifications:
  • Adds value: "arcomstart"
    With data: "c:\documents and settings\administrator\application data\arcomdir\arcom.exe"
    To subkey: HKCU\Software\Microsoft\Windows\CurrentVersion\Run


Prevention


Alert level: Severe
First detected by definition: 1.123.242.0
Latest detected by definition: 1.183.11.0 and higher
First detected on: Mar 23, 2012
This entry was first published on: Mar 29, 2012
This entry was updated on: Mar 30, 2012

This threat is also detected as:
  • Trojan.Win32.Delf.csdw (Kaspersky)
  • Trojan Horse (Symantec)