Analysis by: Janus Agcaoili
 PLATFORM:

Windows

 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

This backdoor may be dropped by other malware.

  TECHNICAL DETAILS

File Size: 1,205 bytes
File Type: Other
Memory Resident: No
Initial Samples Received Date: 10 Mar 2016

Arrival Details

This backdoor may be dropped by the following malware:

  • PHP_SIMPLESHELL.G

Other Details

This backdoor does the following:

  • Execute arbitrary shell commands from a remote user
  • Once this PERL script is installed, the remote user may then launch a backdoor on the affected system. Opening the page, the malicious user is shown the following user interface:

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 12.416.01
FIRST VSAPI PATTERN DATE: 20 Mar 2016
VSAPI OPR PATTERN File: 12.417.00
VSAPI OPR PATTERN Date: 21 Mar 2016

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

Note that not all files, folders, and registry keys and entries are installed on your computer during this malware's/spyware's/grayware's execution. This may be due to incomplete installation or other operating system conditions. If you do not find the same files/folders/registry information, please proceed to the next step.

Step 3

Remove the malware/grayware file that dropped/downloaded PERL_SIMPLESHELL.A. (Note: Please skip this step if the threat(s) listed below have already been removed.)

Step 4

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