Analysis by: Michelle Morales
ALIASES:

Trojan.Shelldos (Symantec), Tool.Shellshock (DrWeb), Win32:Chinaz-A [Trj] (Avast), HackTool.ShellShockCZ (Ikarus)

 PLATFORM:

Windows

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

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

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.

  TECHNICAL DETAILS

File Size: 1,816,064 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 17 Jan 2015

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.

NOTES:

It is a command-line hacking tool that checks for vulnerability of listed hosts (IP addresses).

It makes the vulnerable server download an arbitrary file from the user-defined URL.

It also has an option to specify the number threads to perform its task.

  SOLUTION

Minimum Scan Engine: 9.700
SSAPI PATTERN File: 1.584.21
SSAPI PATTERN Date: 16 Jan 2015

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

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