Content

Generic BackDoor.dr

Type
Trojan
SubType
Dropper
Discovery Date
04/07/2004
Length
Varies
Minimum DAT
4273 (06/25/2003)
Updated DAT
6065 (08/05/2010)
Minimum Engine
5.1.00
Description Added
04/15/2004
Description Modified
02/16/2010 4:06 AM (PT)
Risk Assessment
Corporate User
Low
Home User
Low

Tab Navigation

Characteristics

-- Update February 16, 2010 --

When executed, the Trojan copies itself into the following location

  • %WinDir%\system32\A5479E\F666FA.EXE [Detected as Generic Backdoor.dr]

And drops the following files

  • %WinDir%\system32\A8D5DA\dp1.fne
  • %WinDir%\system32\A8D5DA\eAPI.fne
  • %WinDir%\system32\A8D5DA\HtmlView.fne
  • %WinDir%\system32\A8D5DA\internet.fne
  • %WinDir%\system32\A8D5DA\krnln.fnr
  • %WinDir%\system32\2260A0\0349d9.txt
  • %Temp%\E_N4\dp1.fne
  • %Temp%\E_N4\eAPI.fne
  • %Temp%\E_N4\HtmlView.fne
  • %Temp%\E_N4\internet.fne
  • %Temp%\E_N4\krnln.fnr

The Trojan adds the following registry entry to execute itself in every reboot:

  • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    “E58E7D” = "%WinDir%\system32\A5479E\F666FA.EXE"

The Trojan connects to the IP address 220.181.[removed].175 through a remote port 80.

[Where %WinDir% is the Windows Directory - for example C:\Windows and %Temp% is C:\Documents and Settings\Administrator\Local Settings\Temp]

 

-- Update June 12, 2005 --
The 4511 DAT files contain an incorrect Generic Backdoor.dr identification on certain Inno Setup installer files.  This detection was corrected in the 4512 DAT release.

For further information, please refer to the Generic Backdoor description. 

Symptoms

  • Presence of above mentioned files and registry keys
  • Presence unexpected network connection to the above mentioned IP Address.

Method of Infection

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.

Removal

AVERT recommends to always use latest DATs and engine. This threat will be cleaned if you have this combination.

Additional Windows ME/XP removal considerations

Variants

Variants

    N/A

All Information

Overview -

This is a trojan detection. Unlike viruses, trojans do not self-replicate. They are spread manually, often under the premise that they are beneficial or wanted. The most common installation methods involve system or security exploitation, and unsuspecting users manually executing unknown programs. Distribution channels include email, malicious or hacked web pages, Internet Relay Chat (IRC), peer-to-peer networks, etc.

File Information

  • MD5      - 96C1389D97ED9F260D89685A6950847B
  • SHA      - D38BC109FBCF744809960220E13AE2EB212F5420
  • File Size - 1,243,968 bytes

Aliases

  • Kaspersky  - Trojan-Downloader.Win32.FlyStudio.hk
  • Symantec   - Packed.Generic.244
  • Ikarus        - Trojan.Win32.FlyStudio
  • Norman     - W32/Lineage.CTVY

Characteristics

Characteristics -

-- Update February 16, 2010 --

When executed, the Trojan copies itself into the following location

  • %WinDir%\system32\A5479E\F666FA.EXE [Detected as Generic Backdoor.dr]

And drops the following files

  • %WinDir%\system32\A8D5DA\dp1.fne
  • %WinDir%\system32\A8D5DA\eAPI.fne
  • %WinDir%\system32\A8D5DA\HtmlView.fne
  • %WinDir%\system32\A8D5DA\internet.fne
  • %WinDir%\system32\A8D5DA\krnln.fnr
  • %WinDir%\system32\2260A0\0349d9.txt
  • %Temp%\E_N4\dp1.fne
  • %Temp%\E_N4\eAPI.fne
  • %Temp%\E_N4\HtmlView.fne
  • %Temp%\E_N4\internet.fne
  • %Temp%\E_N4\krnln.fnr

The Trojan adds the following registry entry to execute itself in every reboot:

  • [HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run]
    “E58E7D” = "%WinDir%\system32\A5479E\F666FA.EXE"

The Trojan connects to the IP address 220.181.[removed].175 through a remote port 80.

[Where %WinDir% is the Windows Directory - for example C:\Windows and %Temp% is C:\Documents and Settings\Administrator\Local Settings\Temp]

 

-- Update June 12, 2005 --
The 4511 DAT files contain an incorrect Generic Backdoor.dr identification on certain Inno Setup installer files.  This detection was corrected in the 4512 DAT release.

For further information, please refer to the Generic Backdoor description. 

Symptoms

Symptoms -

  • Presence of above mentioned files and registry keys
  • Presence unexpected network connection to the above mentioned IP Address.

Method of Infection

Method of Infection -

Trojans do not self-replicate. They are spread manually, often under the premise that the executable is something beneficial. Distribution channels include IRC, peer-to-peer networks, newsgroup postings, e-mail, etc.

Removal -

Removal -

AVERT recommends to always use latest DATs and engine. This threat will be cleaned if you have this combination.

Additional Windows ME/XP removal considerations

Variants

Variants -

    N/A