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TROJ_KRYPTIK.GGTT

September 26, 2014
 Analysis by: Vincent Martin Hermosura
 ALIASES:

Trojan-FCYU!992C92722563 (Mcafee), TR/Injector.bms.2 (Antivir), Gen:Variant.Kazy.204694 (Bitdefender), MSIL/Injector.JIX!tr (Fortinet), Win32.SuspectCrc (Ikarus), a variant of MSIL/Kryptik.LF trojan (Esset)

 PLATFORM:

Windows

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

  • Threat Type: Trojan

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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 enables its automatic execution at every system startup by dropping copies of itself into the Windows Common Startup folder.

It connects to certain websites to send and receive information.

  TECHNICAL DETAILS

File Size:

853,504 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

23 Sep 2014

Payload:

Drops files

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.

Autostart Technique

This Trojan enables its automatic execution at every system startup by dropping the following copies of itself into the Windows Common Startup folder:

  • %User Startup%\{malware file name}.exe

(Note: %User Startup% is the current user's Startup folder, which is usually C:\Windows\Profiles\{user name}\Start Menu\Programs\Startup on Windows 98 and ME, C:\WINNT\Profiles\{user name}\Start Menu\Programs\Startup on Windows NT, and C:\Documents and Settings\{User name}\Start Menu\Programs\Startup.)

Information Theft

This Trojan gathers the following data:

  • Computer name
  • IP address
  • Operating system version
  • System directory
  • User name

Other Details

This Trojan connects to the following URL(s) to get the affected system's IP address:

  • http://www.google.com/search?q=public+ip+address

It connects to the following website to send and receive information:

  • http://www.{BLOCKED}essproducts.org/Limitless/Login/submit_log.php

  SOLUTION

Minimum Scan Engine:

9.700

Step 1

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 2

Before doing any scans, Windows XP, Windows Vista, and Windows 7 users must disable System Restore to allow full scanning of their computers.

Step 3

Restart in Safe Mode

[ Learn More ]

Step 4

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.  
  • %User Startup%\{malware file name}.exe

Step 5

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