Analysis by: Roland Marco Dela Paz
ALIASES:

Microsoft : Trojan:Win32/Hiloti.gen!D; Sophos : Mal/Hiloti-D

 PLATFORM:

Windows 2000, XP, Server 2003

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

This Trojan opens random ports.

  TECHNICAL DETAILS

File Size: Varies
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 22 Dec 2010

Installation

This Trojan drops the following copies of itself into the affected system:

  • %Windows%\{random}.dll

(Note: %Windows% is the Windows folder, which is usually C:\Windows.)

It injects codes into the following process(es):

  • explorer.exe

Autostart Technique

This Trojan adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\SOFTWARE\MICROSOFT\
Windows\CURRENTVERSION\Run
{random} = rundll32.exe "%Windows%\{random}.dll",Startup

Backdoor Routine

This Trojan opens a random port to allow a remote user to connect to the affected system. Once a successful connection is established, the remote user executes commands on the affected system.

Other Details

This Trojan does the following:

  • It connects to remote sites to send and receive information.

  SOLUTION

Minimum Scan Engine: 8.900
VSAPI OPR PATTERN File: 7.755.00
VSAPI OPR PATTERN Date: 08 Jan 2011

NOTES:

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