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Trojan:Win32/Lethic.I


First posted on 24 December 2013.
Source: Microsoft

Aliases :

There are no other names known for Trojan:Win32/Lethic.I.

Explanation :

Threat behavior Trojan:Win32/Lethic.I is a malicious program that is unable to spread of its own accord. It may perform a number of actions of an attacker's choice on an affected computer.

Installation

When it runs, Trojan:Win32/Lethic.I copies itself to c:\documents and settings\administrator\application data\vfbu.exe. The malware modifies the following registry entry so that it runs each time you start your PC:

Adds value: "Taskman"
With data: "c:\documents and settings\administrator\application data\vfbu.exe"
To subkey: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon The malware utilizes code injection to hinder detection and removal. When Trojan:Win32/Lethic.I runs, it may inject code into running processes, including the following:

  • explorer.exe


Payload

Contacts remote host
Trojan:Win32/Lethic.I may contact a remote host at winsekurityupdat.co.cc using port 443. Commonly, malware does this to:
  • Report a new infection to its author
  • Receive configuration or other data
  • Download and run files, including updates or other malware
  • Receive instruction from a remote hacker
  • Upload data taken from your PC

This malware description was produced and published using our automated analysis system's examination of file SHA1 d655a9a6576e749fcec8f79d44e6fb0429bda51f.Symptoms

System changes

The following could indicate that you have this threat on your PC:

  • The presence of the following files:

c:\documents and settings\administrator\application data\vfbu.exe
  • You see these entries or keys in your registry:
Adds value: "Taskman"
With data: "c:\documents and settings\administrator\application data\vfbu.exe"
To subkey: HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Winlogon

Last update 24 December 2013

 

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