TROJ_TALERET.AR

May 09, 2013
 Analysis by: Rhena Inocencio
 ALIASES:

TrojanDownloader:Win32/Taleret.D (Microsoft), Trojan-Downloader.Win32.Agent.xnrd (Kaspersky), Win32/TrojanDownloader.Taleret.A trojan (ESET)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

  TECHNICAL DETAILS

File Size:

110,080 bytes

File Type:

DLL

Memory Resident:

Yes

Initial Samples Received Date:

29 Dec 2012

Arrival Details

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

Installation

This backdoor drops the following files:

  • %System%\rundll32.exe.xxt

(Note: %System% is the Windows system folder, which is usually C:\Windows\System32.)

Other Details

This backdoor connects to the following possibly malicious URL:

  • http://{BLOCKED}s.{BLOCKED}o.org:443/{random letters}.asp?{random numbers}
  • http://{BLOCKED}0.{BLOCKED}9.248.195:443/{random letters}.asp?{random numbers}
  • http://{BLOCKED}0.{BLOCKED}9.248.195:80/{random letters}.asp?{random numbers}
  • http://{BLOCKED}s.{BLOCKED}o.org:80/{random letters}.asp?{random numbers}