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TSPY_KIBEX.XXTYU

October 26, 2015
 Analysis by: Sammy Chua
 ALIASES:

Trojan.MSIL.Agent.fnut (Kaspersky); Trojan horse MSIL9.FAA (AVG); a variant of MSIL/Injector.JZF trojan (NOD32);

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW


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

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

592,896 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

29 Sep 2015

Arrival Details

This spyware 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 spyware drops the following copies of itself into the affected system:

  • %All Users Profile%\Important.exe

(Note: %All Users Profile% is the All Users folder, where it usually is C:\Documents and Settings\All Users on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

It drops the following non-malicious files:

  • %All Users Profile%\Browsers.txt
  • %All Users Profile%\Mails.txt
  • %All Users Profile%\{machine name}_{values}.jpg

(Note: %All Users Profile% is the All Users folder, where it usually is C:\Documents and Settings\All Users on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\ProgramData on Windows Vista (32- and 64-bit), Windows 7 (32- and 64-bit), Windows 8 (32- and 64-bit), Windows 8.1 (32- and 64-bit), Windows Server 2008, and Windows Server 2012.)

Autostart Technique

This spyware adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
addb7e774a311d3f625dfd62f4a920a6 = "%All Users Profile%\Important.exe"

Information Theft

This spyware gathers the following data:

  • Machine name
  • Keystroke (w/ Window Title)
  • Timestamp
  • Screenshot

Other Details

This spyware connects to the following website to send and receive information:

  • http://www.{BLOCKED}evon.biz/libs/kbpanel/image/upload.php
  • http://www.{BLOCKED}evon.biz/libs/kbpanel/post.php?type=notification&machinename={machine name}}&machinetime={timestamp}
  • http://www.{BLOCKED}evon.biz/libs/kbpanel/post.php?type=keystrokes&machinename={machine name}&windowtitle={window title}&keystrokestyped={data}&machinetime={timestamp}

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

11.948.03

FIRST VSAPI PATTERN DATE:

29 Sep 2015

VSAPI OPR PATTERN File:

11.949.00

VSAPI OPR PATTERN Date:

30 Sep 2015

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

Restart in Safe Mode

[ Learn More ]

Step 4

Delete this registry value

[ 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_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • addb7e774a311d3f625dfd62f4a920a6 = "%All Users Profile%\Important.exe"

Step 5

Search and delete these files

[ Learn More ]
There may be some 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.  
  • %All Users Profile%\Browsers.txt
  • %All Users Profile%\Mails.txt
  • %All Users Profile%\{machine name}_{values}.jpg

Step 6

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