Threat Encyclopedia

RTKT_FARFLI.UW

Publish date: May 11, 2015

ANALYSIS BY

Cris Nowell Pantanilla


ALIASES:

Hacktool (Symantec); HackTool:WinNT/Tcpz.A (Microsoft); Generic Rootkit.g (Mcafee); Hacktool/Tcpz.A (Panda)

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


This Trojan may arrive bundled with malware packages as a malware component. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It is a component of other malware.

It requires its main component to successfully perform its intended routine.

TECHNICAL DETAILS

File Size:

11,656 bytes

File Type:

SYS

Memory Resident:

Yes

Initial Samples Received Date:

04 Feb 2009

Arrival Details

This Trojan may arrive bundled with malware packages as a malware component.

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

Installation

This Trojan is a component of other malware.

Autostart Technique

This Trojan registers itself as a system service to ensure its automatic execution at every system startup by adding the following registry entries:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\{malware filename}
ImagePath = "\??\{malware path and file name}"

Other Details

This Trojan requires its main component to successfully perform its intended routine.

SOLUTION

Minimum Scan Engine:

9.750

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

Scan your computer with your Trend Micro product and note files detected as RTKT_FARFLI.UW

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry.


 
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services
    • {malware file name}

Step 5

Restart in normal mode and scan your computer with your Trend Micro product for files detected as RTKT_FARFLI.UW. 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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