TSPY_KEYLOG.YYKV


 ALIASES:

TrojanSpy:MSIL/Keylogger.T (Microsoft); Trojan-Spy.MSIL.KeyLogger.bhub (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted:

  • 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.

  TECHNICAL DETAILS

File Size:

196,608 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

16 Dec 2014

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 creates the following folders:

  • %Program Files%\Iaocl
  • %User Profile%\Local Settings\Application DataGsphdue
  • %User Profile%\Application DataGsphdue\Gsphdue

(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

Autostart Technique

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

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Run
Hdajfi = "%Program Files%\Iaocl\Ajgxksi.exe "

Dropping Routine

This spyware drops the following files:

  • %Program Files%\Iaocl\Ajgxksi.exe
  • %Program Files%\Iaocl\sqlnet.dll
  • %Program Files%\Iaocl\Ajgxksi.dat

(Note: %Program Files% is the Program Files folder, where it usually is C:\Program Files on all Windows operating system versions; C:\Program Files (x86) for 32-bit applications running on Windows 64-bit operating systems.)

Other Details

This spyware connects to the following possibly malicious URL:

  • {BLOCKED}.29.108

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.700

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

Restart in Safe Mode

[ Learn More ]

Step 3

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_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
    • Hdajfi = "%Program Files%\Iaocl\Ajgxksi.exe "

Step 4

Search and delete these components

[ Learn More ]
There may be some components 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.
  • %Program Files%\Iaocl\Ajgxksi.exe
  • %Program Files%\Iaocl\sqlnet.dll
  • %Program Files%\Iaocl\Ajgxksi.dat

Step 5

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.
  • %Program Files%\Iaocl
  • %User Profile%\Local Settings\Application DataGsphdue
  • %User Profile%\Application DataGsphdue\Gsphdue

Step 6

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