Analysis by: Homer Pacag
ALIASES:

HEUR:Trojan.Win32.Generic (Kaspersky);

 PLATFORM:

Windows

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

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

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

This hacking tool arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites. It may be manually installed by a user.

  TECHNICAL DETAILS

File Size: 269,824 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 31 Jul 2015
Payload: Displays graphics/image

Arrival Details

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

It may be manually installed by a user.

Installation

This hacking tool drops the following files:

  • {Malware Path}\Stub.exe
  • {Malware Path}\server.exe

NOTES:

It is used for checking a Gmail account and its username and password once the account is valid.

It displays the following message box if the account is invalid:

It displays the following message box if the account is valid:

An email is send to valid account using another email:

It uses the following Graphical User Interface (GUI):

  SOLUTION

Minimum Scan Engine: 9.750
SSAPI PATTERN File: 1.646.16
SSAPI PATTERN Date: 31 Jul 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

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.
  • {Malware Path}\Stub.exe
  • {Malware Path}\server.exe

Step 4

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