Analysis by: Mariefher Grace Villanueva
ALIASES:

ELF:GsNetcat-C [PUP] (AVAST); HackTool:Linux/GsNetcat!rfn (MICROSOFT); a variant of Linux/HackTool.GsNetcat.A trojan (NOD32)

 PLATFORM:

Linux

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

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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

It requires being executed with a specific argument/parameter, an additional component, or in a specific environment in order to proceed with its intended routine.

  TECHNICAL DETAILS

File Size: 2846128 bytes
File Type: ELF
Initial Samples Received Date: 24 Oct 2024

Arrival Details

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

Other Details

This Hacking Tool accepts the following parameters:

  • -s secret → Specify the shared secret for the encrypted connection
  • -k file → Read the secret from a file
  • -l → Server/listening mode
  • -d ip → Specify the destination IP address for port forwarding
  • -p port → Specify the destination port for port forwarding
  • -e cmd → Execute a command and pipe output to the connected peer
  • -i → Interactive PTY login shell mode
  • -r → File transfer mode via stdin/stdout piping
  • -S → Act as a SOCKS proxy server
  • -T → Route traffic via TOR or a SOCKS proxy
  • -D → Daemon and watchdog mode with background auto-restart
  • -C → Disable encryption and use clear-text mode
  • -g → Generate a secure random password

It requires being executed with a specific argument/parameter, an additional component, or in a specific environment in order to proceed with its intended routine.

  SOLUTION

Minimum Scan Engine: 9.800
SSAPI PATTERN File: 2.777.00
SSAPI PATTERN Date: 31 Oct 2024

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to delete files detected as HackTool.Linux.NetCat.B. 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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