Analysis by: Dianne Lagrimas
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This description is based is a compiled analysis of several variants of TROJ_TRACUR. Note that specific data such as file names and registry values may vary for each variant.

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be downloaded by other malware/grayware/spyware from remote sites. It may be dropped by other malware.

It exports functions used by other malware.

  TECHNICAL DETAILS

File Size: Varies
File Type: PE
Memory Resident: Yes
Initial Samples Received Date: 24 Jun 2009
Payload: Connects to URLs/IPs

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It may be downloaded by other malware/grayware/spyware from remote sites.

It may be dropped by other malware.

Installation

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

  • %System%\{random file name}.exe

(Note: %System% is the Windows system folder, which is usually C:\Windows\System on Windows 98 and ME, C:\WINNT\System32 on Windows NT and 2000, or C:\Windows\System32 on Windows XP and Server 2003.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
{random characters} = "{malware file name}"

Download Routine

This Trojan connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}9.{BLOCKED}5.49.220/update/
  • http://{BLOCKED}.{BLOCKED}8.240.82/update/
  • http://{BLOCKED}.{BLOCKED}7.53.210/update/
  • http://{BLOCKED}.{BLOCKED}7.153.48/update/
  • http://{BLOCKED}1.{BLOCKED}7.153.48
  • http://{BLOCKED}230.12/bin_v85.rar
  • http://{BLOCKED}.1.174/update/{random characters}
  • http://{BLOCKED}.53.210/update/{random characters}
  • http://{BLOCKED}.153.48/update/{random characters}
  • {BLOCKED}ebox.com
  • {BLOCKED}main.com
  • {BLOCKED}o.com
  • {BLOCKED}x.com
  • http://{BLOCKED}.{BLOCKED}.236.75/cdn/ppx144415070
  • http://{BLOCKED}.{BLOCKED}.228.62/index/vf0728c248567214
  • http://{BLOCKED}.{BLOCKED}.228.62/index/fs0728c125254868
  • http://{BLOCKED}.1.173/doit/{random characters}
  • http://{BLOCKED}.1.174/tornado/{random characters}

Other Details

This Trojan exports functions used by other malware.

NOTES:

This description is based is a compiled analysis of several variants of TROJ_TRACUR. Note that specific data such as file names and registry values may vary for each variant.

  SOLUTION

Minimum Scan Engine: 9.200

Trend customers:

    Keep your pattern and scan engine files updated. Trend Micro antivirus software can clean or remove most types of computer threats. Malware, though, such as Trojans, scripts, overwriting viruses and joke programs which are identified as uncleanable, should simply be deleted.

All Internet users:

    1. Use HouseCall - the Trend Micro online threat scanner to check for malware that may already be on your PC.
    2. Catch malware/grayware before they affect your PC or network. Secure your Web world with Trend Micro products that offer the best anti-threat and content security solutions for home users, corporate users, and ISPs. Go here for more information on Trend Micro products that fit your needs.


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