BACKDOOR.JAVA.JACKSBOT.AA
Java/Jacksbot.AC ( ESET-NOD32), Trojan-Dropper.Java.Agent.an (Kaspersky), Java:JRat-D [Trj] (Avast)
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
Threat Type: Backdoor
Destructiveness: No
Encrypted: Yes
In the wild: Yes
OVERVIEW
Downloaded from the Internet, Dropped by other malware
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.
It executes commands from a remote malicious user, effectively compromising the affected system.
TECHNICAL DETAILS
244,786 bytes
JAR
Yes
Compromises system security, Collects system information, Connects to URLs/IPs, Launches DoS/DDoS attacks, Terminates processes, Generates sound, Restarts system
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 and executes the following files:
- %Application Data%\Java.jar <- main jRAT server module
(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, 7, and 8.)
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
Java = "{java installation path}\javaw.exe" –jar “%Application Data%\Java.jar"
Backdoor Routine
This Backdoor executes the following commands from a remote malicious user:
- View System 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
- DDOS
- Elevate Permission
- 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 uninstall itself
It connects to the following URL(s) to send and receive commands from a remote malicious user:
- {BLOCKED}.{BLOCKED}.229.216:5050
SOLUTION
9.700
14.754.07
16 Jan 2019
14.755.00
17 Jan 2019
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
Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.
Step 3
Identify and terminate files detected as BACKDOOR.JAVA.JACKSBOT.AA
- 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.
- 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.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 4
Delete this registry value
Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Java = "{java installation path}\javaw.exe" -jar "%AppData%\Java.jar"
- Java = "{java installation path}\javaw.exe" -jar "%AppData%\Java.jar"
Step 5
Search and delete this file
- %Application Data%\Java.jar
Step 6
Scan your computer with your Trend Micro product to delete files detected as BACKDOOR.JAVA.JACKSBOT.AA. 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 the following Trend Micro Support pages for more information:
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