TR/Vidro.U - Trojan

See also

Summary

Full description

Statistics

Virus:	TR/Vidro.U
Date discovered:	27/09/2005
Type:	Trojan
In the wild:	No
Reported Infections:	Low
Distribution Potential:	Low
Damage Potential:	Low to medium
Static file:	Yes
File size:	54.792 Bytes
MD5 checksum:	324ff3f8f458597353223adb9f5a1c24
VDF version:	6.32.0.13

General Method of propagation:
   • No own spreading routine

Aliases:
   • Symantec: PWSteal.Trojan
   • Mcafee: MultiDropper-NW
   • Kaspersky: Trojan-Dropper.Win32.Vidro.u
   • TrendMicro: TROJ_VIDRO.C
   • Bitdefender: Trojan.Dropper.Vidro.U

Platforms / OS:
   • Windows 95
   • Windows 98
   • Windows 98 SE
   • Windows NT
   • Windows ME
   • Windows 2000
   • Windows XP
   • Windows 2003

Side effects:
   • Drops a file
   • Registry modification

Files It copies itself to the following location:
• %SYSDIR%\%five-digit random character string%.exe

It deletes the initially executed copy of itself.

The following file is created:

– %system drive root%\System Volume Information\tracking.log This file contains collected information about the system.

Registry The following registry key is added in order to run the process after reboot:

– [HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon]
• "System"="%five-digit random character string%.exe"

The following registry key is added:

– [HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\
%five-digit random character string%]

Rootkit Technology It is a malware-specific technology. The malware hides its presence from system utilities, security applications and in the end, from the user.

Hides the following:
– Its own file
– Its own process
– Its own registry keys

Method used:
• Hidden from Windows API

File details Runtime packer:
In order to aggravate detection and reduce size of the file it is packed with a runtime packer.

See a brief description here.

Description inserted by Iulia Diaconescu on Wed, 28 Sep 2005 08:18 (GMT+1)
Description updated by Iulia Diaconescu on Fri, 30 Sep 2005 15:54 (GMT+1)

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