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

Tamaño del archivo 110,080 bytes
Tipo de archivo DLL
Residente en memoria Yes
Fecha de recepción de las muestras iniciales 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}