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Backdoor.ASP.WEBSHELL.KEPH

June 25, 2019
 ALIASES:

ASP.Backdoor.Aspy.a (Baidu); Trojan.ASP.Aspy (Ikarus); PHP/WebShell.s (McAfee)

 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:

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

  TECHNICAL DETAILS

File Size:

109,798 bytes

File Type:

ASP

Memory Resident:

No

Initial Samples Received Date:

09 Jun 2019

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 hosted on a website and run when a user accesses the said website.

Other Details

This Backdoor does the following:

  • It is capable of:
    • Listing directories and files (includes file information)
    • Adding and removing mapped drives
    • Creating files and folders
    • Renaming files and folders
    • Copying, moving, and deleting files
    • Running SQL command
    • Executing arbitrary commands via CMD
    • Uploading and downloading files
    • Remotely viewing image files (JPEG, GIF, BMP, PNG)

It requires being hosted on a web server in order to proceed with its intended routine.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.162.09

FIRST VSAPI PATTERN DATE:

10 Jun 2019

VSAPI OPR PATTERN File:

15.163.00

VSAPI OPR PATTERN Date:

11 Jun 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 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 Backdoor.ASP.WEBSHELL.KEPH. 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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