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TSPY_KEGOTIP.YNJ

August 09, 2016
 Analysis by: Janus Agcaoili
 Modified by: Robert Tacbad
 ALIASES:

Trojan-PSW.Win32.Minari.mg (Kaspersky), Trojan.Minari (Zoner), Trojan.PSW.Minari.h (Jiangmin)

 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

Infection Channel:

Downloaded from the Internet


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.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

336,896 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

22 Dec 2015

Payload:

Connects to URLs/IPs

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 files:

  • %User Temp%\MSWQ{Available Drive's Letter}.tmp - Contains the malware's last accessed directory

(Note: %User Temp% is the user's temporary folder, where it usually is C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local\Temp 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 adds the following mutexes to ensure that only one of its copies runs at any one time:

  • MutexName = "5629186B-0207-4659-AE5D-B09282932A86_{value from 519 to 618}"

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
regedit32 = "{Malware path}\{Malware filename}.exe"

Other System Modifications

This spyware adds the following registry entries as part of its installation routine:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion
VendorId = "{Random Value}"

It creates the following registry entry(ies) to bypass Windows Firewall:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\SharedAccess\Parameters\
FirewallPolicy\StandardProfile\AuthorizedApplications\
List
{Malware Path}\{Malware Filename}.exe = "{Malware Path}\{Malware Filename}.exe:*:Enabled:Microsoft Office"

Information Theft

This spyware attempts to steal stored account information used in the following installed File Transfer Protocol (FTP) clients or file manager software:

  • SecureFX
  • CoreFTP
  • FTPRush
  • UltraFXP
  • ALFTP
  • FTP Commander
  • FTP Navigator
  • CoffeeCup
  • TurboFTP
  • SmartFTP
  • ws_ftp
  • Ghisler
  • MS IE FTP
  • FileZilla
  • GlobalScape
  • far
  • far2

Stolen Information

This spyware sends the gathered information via HTTP POST to the following URL:

  • http://{BLOCKED}.{BLOCKED}.217.141
  • http://{BLOCKED}a.in/admin/index.php

Other Details

However, as of this writing, the said sites are inaccessible.

NOTES:

The spyware gathers email addresses from files except those with the following extensions:

  • .rar
  • .zip
  • .cab
  • .avi
  • .mp3
  • .jpg
  • .gif

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.226.04

FIRST VSAPI PATTERN DATE:

22 Dec 2015

VSAPI OPR PATTERN File:

12.227.00

VSAPI OPR PATTERN Date:

23 Dec 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

Scan your computer with your Trend Micro product and note files detected as TSPY_KEGOTIP.YNJ

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

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
    • regedit32 = "{Malware path}\{Malware filename}.exe"
  • In HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\SharedAccess\Parameters\FirewallPolicy\StandardProfile\AuthorizedApplications\List
    • {Malware Path}\{Malware Filename}.exe = "{Malware Path}\{Malware Filename}.exe:*:Enabled:Microsoft Office"
  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion
    • VendorId = "{Random Value}"

Step 6

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 Temp%]\MSWQ{Available Drive's Letter}.tmp

Step 7

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

Step 8

Scan your computer with your Trend Micro product to delete files detected as TSPY_KEGOTIP.YNJ. 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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