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JAVA_JACKSBOT.I

March 01, 2014
 Analysis by: Mark Joseph Manahan
 ALIASES:

Java/Downloader.LL (AVG), Java/Jacksbot.L (Eset), Trojan.Maljava (Symantec)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit), Mac OS, Linux, FreeBSD, Unix

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Spammed via email


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.

It executes commands from a remote malicious user, effectively compromising the affected system. It connects to a website to send and receive information.

It steals certain information from the system and/or the user.

  TECHNICAL DETAILS

File Size:

250,410 bytes

File Type:

JAR

Memory Resident:

Yes

Initial Samples Received Date:

28 Feb 2014

Payload:

Compromises system security, Collects system information

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 the following copies of itself into the affected system:

  • %Application Data%\scvdoz.jar.jar

(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.)

Backdoor Routine

This backdoor executes the following commands from a remote malicious user:

  • Open Website
  • Random Mouse Movements
  • Play sounds (Beep, Wav, Text Speech)
  • Display Message Box / Chat Window
  • Drain CPU
  • Remote Command Shell
  • Create New Process
  • Modify Hosts File
  • Modify Registries
  • List Installed Programs
  • Manipulate Startup Registries / Services
  • View Screen
  • Capture Sound
  • Download and execute malicious scripts
  • File Manipulation
  • View uTorrent Downloads
  • View FileZilla Connections
  • Copy Clipboard
  • Download Files
  • View connected LAN Computers
  • View Active Ports
  • View Net Gateway
  • Shutdown, Restart, Hibernate, Lock , Logout Machine
  • Load Plugins (Keylogger, Webcam)
  • Update and Uninstalled Itself

It connects to the following websites to send and receive information:

  • {BLOCKED}.{BLOCKED}.114.46:1508

Information Theft

This backdoor steals the following information:

  • Memory (RAM)
  • Processors
  • Latency
  • Username
  • Computer Name
  • OS Information
  • Country
  • Java Version
  • Antivirus Installed
  • Firewall Installed
  • LAN Information
  • System Usage
  • System Locales
  • Environment Variables
  • System Properties
  • Disk Drives
  • Display Information
  • Network Adapter

  SOLUTION

Minimum Scan Engine:

9.700

FIRST VSAPI PATTERN FILE:

10.634.04

FIRST VSAPI PATTERN DATE:

28 Feb 2014

Step 1

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 2

Identify and terminate files detected as JAVA_JACKSBOT.I

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Scan your computer with your Trend Micro product to delete files detected as JAVA_JACKSBOT.I. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check this Knowledge Base page for more information.


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