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Trojan:Win32/Tinba.C


First posted on 11 September 2014.
Source: Microsoft

Aliases :

There are no other names known for Trojan:Win32/Tinba.C.

Explanation :

Threat behavior

Installation

Trojan:Win32/Tinba.C copies itself to c:\documents and settings\administrator\application data\fda38b86\bin.exe. The malware changes the following registry entries so that it runs each time you start your PC:

In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
Sets value: "FDA38B86"
With data: "c:\documents and settings\administrator\application data\fda38b86\bin.exe" The malware creates the following files on your PC:

  • c:\documents and settings\administrator\application data\fda38b86\log.dat
  • c:\documents and settings\administrator\application data\fda38b86\ntf.dat
The malware uses code injection to make it harder to detect and remove. It can inject code into running processes, including the following:

  • _avpm.exe
  • adware.exe
  • antivirus.exe
  • asktao.exe
  • AUPDATE.EXE
  • AVGW.EXE
  • avp32.exe
  • avpcc.exe
  • blackice.exe
  • ccenter.exe
  • cmd.exe
  • DRWEB32.EXE
  • egui.exe
  • ekrn.exe
  • ElementClient.exe
  • explorer.exe
  • fsav.exe
  • game.exe
  • InoRT.exe
  • kav.exe


Payload

Contacts remote host

Trojan:Win32/Tinba.C might contact a remote host at microsoftupdate-server2.com using port 80. 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 instructions from a remote hacker
  • Upload data taken from your PC
This malware description was produced and published using automated analysis of file SHA1 c5d7683dcbc3aff3632f8c3998fb13df9284c6c6.Symptoms

System changes

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

  • You have these files:

    c:\documents and settings\administrator\application data\fda38b86\bin.exe
    c:\documents and settings\administrator\application data\fda38b86\log.dat
    c:\documents and settings\administrator\application data\fda38b86\ntf.dat
  • You see these entries or keys in your registry:

    Sets value: "FDA38B86"
    With data: "c:\documents and settings\administrator\application data\fda38b86\bin.exe"
    In subkey: HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

Last update 11 September 2014

 

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