Modified by: Ardin Christopher Maglalang
ALIASES:

Troj/Agent-AFHS(Sophos), TrojanDownloader:Win32/Kuluoz.D(Micrososft), Trojan.Win32.Generic.pak!cobra(Sunbelt)

 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 as an attachment to email messages spammed by other malware/grayware or malicious users. It 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 121,344 bytes
Tipo de archivo EXE

Arrival Details

This backdoor arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

It 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 a copy of itself in the following folders using different file names:

  • %Application Data%\{Random Filename}.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Autostart Technique

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

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{Random} = "%Application Data%\{Random Filename}.exe"

Other System Modifications

This backdoor adds the following registry keys:

HKEY_CURRENT_USER\Software\{Random Key}

It adds the following registry entries:

HKEY_CURRENT_USER\Software\{Random Key}
{Random} = "{Hex Values}"

Other Details

This backdoor connects to the following possibly malicious URL:

  • http://{BLOCKED}.{BLOCKED}.88.42:8080/{Generated Value}
  • http://{BLOCKED}.{BLOCKED}7.4.27:8080/{Generated Value}
  • http://{BLOCKED}.{BLOCKED}.116.171:8080/{Generated Value}
  • http://{BLOCKED}0.{BLOCKED}4.253.222:443/{Generated Value}
  • http://{BLOCKED}3.{BLOCKED}.200.33:8080/{Generated Value}
  • http://{BLOCKED}2.{BLOCKED}.64.35:8080/{Generated Value}