PHP_C99SHELL.JNR

February 22, 2017
 Analysis by: Joselyn Canuela
 ALIASES:

PHP.Backdoor.Trojan(Symactec), Backdoor:PHP/Shell.C (Microsoft), Backdoor.PHP.C99Shell (Ikarus), Backdoor.PHP.C99Shell.cn (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This backdoor may be hosted on a website and run when a user accesses the said website.

  TECHNICAL DETAILS

File Size:

162,707 bytes

File Type:

Script

Memory Resident:

No

Initial Samples Received Date:

26 Sep 2015

Arrival Details

This backdoor may be hosted on a website and run when a user accesses the said website.

Other Details

This backdoor does the following:

  • List files and folders
  • View file and folder information
  • Create a file
  • View a file
  • Provide user full access to files and folders
  • Execute a shell commands
  • Upload/Download a file to/from the web server
  • View list of processes running on the system
  • Manage SQL databases

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

12.110.05

FIRST VSAPI PATTERN DATE:

26 Oct 2015

VSAPI OPR PATTERN File:

12.111.00

VSAPI OPR PATTERN Date:

27 Oct 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 PHP_C99SHELL.JNR. 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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