Analysis by: Cris Nowell Pantanilla
 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: 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 executes commands from a remote malicious user, effectively compromising the affected system.

  TECHNICAL DETAILS

File Size: 727,556 bytes
File Type: ELF
Memory Resident: Yes
Initial Samples Received Date: 28 Apr 2017
Payload: Connects to URLs/IPs, Compromises system security, Launches DoS/DDoS attacks

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.

It may be downloaded from the following remote sites:

  • http://{BLOCKED}.{BLOCKED}.51.36/linux

Backdoor Routine

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

  • Get Online Messages
  • Remove Server
  • Download file and execute
  • Get CPU Information
  • Get System Information
  • Get network activity
  • Execute Shell
  • Perform DDOS Attack
    • UDP Flood
    • Syn Flood
    • DNS Flood
    • TCP Flood
  • Disable firewalls:
    • reSuSE firewall
    • SuSE firewall

It connects to the following URL(s) to send and receive commands from a remote malicious user:

  • {BLOCKED}.{BLOCKED}.59.131:1021

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 13.368.07
FIRST VSAPI PATTERN DATE: 28 Apr 2017
VSAPI OPR PATTERN File: 13.369.00
VSAPI OPR PATTERN Date: 29 Apr 2017

Scan your computer with your Trend Micro product to delete files detected as ELF_BASHLITE.ED. 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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