Analysis by: Jennifer Gumban

 PLATFORM:

Linux

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

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 joins an Internet Relay Chat (IRC) channel. It executes commands from a remote malicious user, effectively compromising the affected system.

  TECHNICAL DETAILS

File Size: 190,510 bytes
File Type: ELF
Memory Resident: Yes
Initial Samples Received Date: 26 Oct 2016
Payload: Connects to URLs/IPs, Executes commands

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.

Backdoor Routine

This Backdoor opens the following ports:

  • 2275

It connects to any of the following IRC server(s):

  • {BLOCKED}.{BLOCKED}.216.2

It joins any of the following Internet Relay Chat (IRC) channels:

  • #whatever

It executes the following commands from a remote malicious user:

  • TSUNAMI
  • PAN
  • UDP
  • UNKNOWN
  • NICK
  • SERVER
  • GETSPOOFS
  • SPOOFS
  • DISABLE
  • ENABLE
  • KILL
  • GET
  • VERSION
  • KILLALL
  • HELP
  • IRC
  • SH

Other Details

This Backdoor does the following:

  • Execute shell commands
  • Download and execute files
  • Execute DDOS Attacks
  • Communicate via IRC channels

It uses the following credentials when accessing its IRC server:

  • NICK = {random}
  • USER = {random}
  • KEY = "bleh"

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 12.864.05
FIRST VSAPI PATTERN DATE: 28 Oct 2016

Scan your computer with your Trend Micro product to delete files detected as ELF_KAITEN.SML. 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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