Analysis by: Christopher Daniel So
 PLATFORM:

Windows 2000, Windows XP, Windows Server 2003

 OVERALL RISK RATING:
 REPORTED INFECTION:
 SYSTEM IMPACT RATING:
 INFORMATION EXPOSURE:

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This hacking tool may be dropped by other malware. It may be manually installed by a user.

  TECHNICAL DETAILS

File Size: 94,208 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 31 Aug 2011

Arrival Details

This hacking tool may be dropped by other malware.

It may be manually installed by a user.

NOTES:
This is the Trend Micro detection for a hacking tool that acts as a server. It receives commands from a remote user through the port specified in its command-line parameter. It executes the received commands by spawning a hidden Command Prompt. The result of the command is saved in C:\101.txt. The file C:\101.txt is encrypted and the encrypted version is saved as C:\102.txt. The contents of the file C:\102.txt is sent back to the remote user.

  SOLUTION

Minimum Scan Engine: 9.200
SSAPI PATTERN File: 1.212.04
SSAPI PATTERN Date: 01 Sep 2011

Step 1

For Windows XP and Windows Server 2003 users, before doing any scans, please make sure you disable System Restore to allow full scanning of your computer.

Step 2

Identify and terminate files detected as HKTL_PORTSERV

[ Learn More ]
  1. 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.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 3

Search and delete these files

[ Learn More ]
There may be some component files that are hidden. Please make sure you check the Search Hidden Files and Folders checkbox in the "More advanced options" option to include all hidden files and folders in the search result.
  • C:\101.txt
  • C:\102.txt

Step 4

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