Analysis by: Joachim Suico
ALIASES:

Trojan:Win32/Hadoc.A!dha (Microsoft); Trojan-Spy.Win32.AutoHK.e (Kaspersky); Trojan.Win32.AutoHK.e (Baidu-International)

 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

This Trojan 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: 766,464 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 01 Mar 2015

Arrival Details

This Trojan 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:

  • {Removable Drives}\RMT_Core
  • {Removable Drives}\RMT_UserData

NOTES:

It sets the attributes of the created folder to Read Only, System, and Hidden.

This Trojan copies RMT_Logo.png and all .EXE files in its installation directory to the following folder:

  • {Removable Drives}\RMT_Core

It moves all files in the removable drive that are not system files and hidden to the following folder:

  • {Removable Drives}\RMT_UserData

It creates the following shortcut:

  • {Removable Drives}\SecureBrowsing.lnk - which points to TROJ_HADOC.CB

  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: 03 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

Scan your computer with your Trend Micro product and note files detected as TROJ_HADOC.C

Step 4

Terminate the malware/grayware/spyware process:

[ Learn More ]
  1. 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.
  2. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 5

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

    TROJ_HADOC.CB

Step 6

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

*Note: 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.


Did this description help? Tell us how we did.