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Trojan.Linux.SSHBRUTE.UWEJT

June 27, 2020
 Analysis by: Joshua Paul Ignacio
 ALIASES:

ELF/BruteForce.I!tr (FORTINET), Trojan:Linux/CoinMiner!rfn (MICROSOFT)

 PLATFORM:

Linux

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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

  TECHNICAL DETAILS

File Size:

1,893,644 bytes

File Type:

ELF

Initial Samples Received Date:

26 Jun 2020

Arrival Details

This Trojan 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 Trojan does the following:

  • Upon executing, it will display the following list of arguments:
    • Use: scan [OPTIONS] [[USER PASS]] FILE] [IPs/IPs Port FILE]
    • Options:
      • -t [NUMTHREADS]: Change the number of threads used. Default is 10
      • -m [MODE]: Change the way the scan works. Default is 1
      • -f [FINAL SCAN]: Does a final scan on found servers. Default is 2
      • Use -f 1 for A.B class /16. Default is 2 for A.B.C /24
      • -i [IP SCAN]: use -i 0 to scan ip class A.B. Default is 1
      • if you use -i 0 then use ./scan -p 22 -i 0 p 192.168 as agrument for ip file
      • -m 0 for non selective scanning
      • -P 0 leave default password unchanged. Changes password by default.
      • -s [TIMEOUT]: Change the timeout. Default is 6
      • -S [2ndTIMEOUT]: Change the 2nd timeout. Default is 6
      • -p [PORT]: Specify another port to connect to. 0 for multiport
      • -c [REMOTE-COMMAND]: Command to execute on connect. Use ; or && with commands
      • -h : Show this help
      • -H 1: For extra help

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.954.08

FIRST VSAPI PATTERN DATE:

26 Jun 2020

VSAPI OPR PATTERN File:

15.955.00

VSAPI OPR PATTERN Date:

27 Jun 2020

Scan your computer with your Trend Micro product to delete files detected as Trojan.Linux.SSHBRUTE.UWEJT. 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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