Analysis by: David John Agni
 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

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

This malware is the payload for the BIND Denial of Service vulnerability assigned with CVE-2015-5477. Once this vulnerability is successfully exploited, it could launch denial of service attacks.

To get a one-glance comprehensive view of the behavior of this Trojan, refer to the Threat Diagram shown below.

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It launches denial of service (DoS) attacks against certain websites. It does the said routine to prevent users from reaching these sites at a given time.

It takes advantage of certain vulnerabilities.

  TECHNICAL DETAILS

File Size: 10,752 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 06 Aug 2015
Payload: Launches denial of service attacks

Arrival Details

This Trojan arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Denial of Service (DoS) Attack

This Trojan launches DoS attacks against the following websites:

  • {entered parameter}

Other Details

As of this writing, there is no available patch for this vulnerability.

It takes advantage of the following vulnerabilities:

NOTES:

It accepts the following parameter:

  • {target hostname}

  SOLUTION

Minimum Scan Engine: 9.750
VSAPI OPR PATTERN File: 11.835.00

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

Identify and terminate files detected as DDOS_TKEY.A

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. If the detected file is displayed in either Windows Task Manager or Process Explorer but you cannot delete it, restart your computer in safe mode. To do this, refer to this link for the complete steps.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

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