Analysis by: kathleenno
ALIASES:

Hacktool (Symantec); Backdoor:Win32/Delf.B (Microsoft); HackTool.Win32.Agent.qu (Kaspersky); NetSniff (Mcafee)

 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: No

  • In the wild: Yes

  OVERVIEW

This hacking tool is a command-line program that may be used to sniff certain information and save them into a file.

This hacking tool 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: 25,088 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 25 Jun 2011

Arrival Details

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

NOTES:

It is a command-line program that may be used to sniff the following information and save them into a file:

  • HTTP sessions
  • FTP credentials (username and password)

It may also perform the following:

  • hack sites by inserting files, code or text
  • modify DNS

Upon execution, it displays the following information:

  • network interface
  • IP address
  • physical address
  • default gateway

It accepts the following parameters:

  • idx [index]
  • ip [ip]
  • sethost [ip]
  • port [port]
  • reset
  • hostname
  • logfilter [string]
  • save_a [filename]
  • save_h [filename]
  • hacksite [ip]
  • insert [html code]
  • postfix [string]
  • hackURL [url]
  • filename [name]
  • hackdns [string]
  • Interval [ms]
  • spoofmode [1|2|3]
  • speed [kb]

  SOLUTION

Minimum Scan Engine: 8.900

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

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