Analysis by: Alvin Bacani
ALIASES:

MSIL/Kryptik.JQ (FORTINET); Trojan.MSIL.Crypt.aafc (KASPERSKY)

 PLATFORM:

Windows 2000, Windows Server 2003, Windows XP (32-bit, 64-bit), Windows Vista (32-bit, 64-bit), Windows 7 (32-bit, 64-bit)

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Downloaded from the Internet, Dropped by other malware

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 deletes the initially executed copy of itself.

  TECHNICAL DETAILS

File Size: 386,048 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 20 May 2013

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 and executes them:

  • %Application Data%\temp.exe

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

It creates the following folders:

  • %Application Data%\Microsoft\Backups

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000, XP, and Server 2003, or C:\Users\{user name}\AppData\Roaming on Windows Vista and 7.)

Information Theft

This spyware attempts to get stored information such as user names, passwords, and hostnames from the following browsers:

  • Chrome
  • Internet Explorer
  • Safari
  • Opera
  • Firefox

Other Details

This spyware deletes the initially executed copy of itself

NOTES:

It also attempts to steal information, such as username and password from the following:

  • Bitcoin\wallet.dat
  • EpicBot
  • minecraft
  • RSBot
  • FileZilla
  • SmartFTP
  • CoreFTP
  • dyndns
  • DownloadManager
  • IMVU
  • MSN Messenger
  • Nimbuzz
  • Vitalwerks

It attempts to send gathered information to a predetermined email address using Simple Mail Transfer Protocol (SMTP).

  SOLUTION

Minimum Scan Engine: 9.300
FIRST VSAPI PATTERN FILE: 9.936.07
FIRST VSAPI PATTERN DATE: 23 May 2013
VSAPI OPR PATTERN File: 9.937.00
VSAPI OPR PATTERN Date: 23 May 2013

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 TSPY_KRYPTIK.QOV

Step 3

Identify and terminate files detected as TSPY_KRYPTIK.QOV

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. 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.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

Search and delete these folders

[ Learn More ]
Please make sure you check the Search Hidden Files and Folders checkbox in the More advanced options option to include all hidden folders in the search result.
  • "%Application Data%"\Microsoft\Backups

Step 5

Search and delete this file

[ 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.  
  • %Application Data%\temp.exe

Step 6

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