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TROJ_HADOC.CB

May 16, 2015
 Analysis by: Joachim Suico
 ALIASES:

Trojan:Win32/Hadoc.A (Microsoft); Mal/Generic-S (Sophos); Trojan.GenericKD.2234213 (F-Secure)

 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, Via physical/removable drives


This Trojan arrives via removable drives. It 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:

910,336 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

29 Dec 2014

Arrival Details

This Trojan arrives via removable drives.

It 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 Trojan creates the following folders:

  • %Application Data%\SecureBrowsing

(Note: %Application Data% is the Application Data folder, where it usually is C:\Documents and Settings\{user name}\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Roaming 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.)

NOTES:

It sets the attributes of the created folders and copied files to Read Only, System and Hidden.

It copies the file RMT_Logo.png and all .EXE files in the malware installation directory to the following folder:

  • %Application Data%\SecureBrowsing

It creates shortcuts in the User Startup folder pointing to its component files:

  • %User Startup%\LCL_SecureBrowsing.lnk - points to TROJ_HADOC.C
  • %User Startup%\LCL_SysProtect.lnk - points to TROJ_HIDEFIL.VTH
  • %User Startup%\LCL_WebProtect.lnk
  • %User Startup%\LCL_FileProtect.lnk

This Trojan executes its component files.

  SOLUTION

Minimum Scan Engine:

9.750

FIRST VSAPI PATTERN FILE:

11.664.03

FIRST VSAPI PATTERN DATE:

02 Mar 2015

VSAPI OPR PATTERN File:

11.665.00

VSAPI OPR PATTERN Date:

02 Mar 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

Restart in Safe Mode

[ Learn More ]

Step 4

Remove the malware/grayware file dropped/downloaded by TROJ_HADOC.CB. (Note: Please skip this step if the threat(s) listed below have already been removed.)

     TROJ_HIDEFIL.VTH and TROJ_HADOC.C

Step 5

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%\LCL_SecureBrowsing.lnk
  • %User Startup%\LCL_WebProtect.lnk
  • %User Startup%\LCL_FileProtect.lnk
  • %User Startup%\LCL_SysProtect.lnk
  • %Application Data%\SecureBrowsing\RMT_Logo.png

Step 6

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