HTML_WEBSHELL.B

March 10, 2014
 Analysis by: Mark Joseph Manahan
 ALIASES:

JSP/WebShell.A (exact) (Fprot) ,Backdoor.Java.JSP (Ikarus) ,BackDoor-JShell.b (McAfee) ,Backdoor.Trojan (Symantec)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Backdoor

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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.

  TECHNICAL DETAILS

File Size:

56,781 bytes

File Type:

HTML, HTM, Java

Initial Samples Received Date:

30 Jan 2014

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.

NOTES:

This malware performs commands when accessed by malicious users on the web server it is installed depending on the parameter sent.