Modified by: Pearl Charlaine Espejo
ALIASES:

HideVault (McAfee); Trojan:Win32/Bumat!rts (Microsoft); Hacktool.Rootkit (Symantec); TR/Drop.HideVault (Avira)

 PLATFORM:

Windows

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

  • Threat Type: Rootkit

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

This rootkit 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: 644,608 bytes
File Type: EXE
Memory Resident: Yes
Initial Samples Received Date: 20 Jan 2016

Arrival Details

This rootkit 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 rootkit drops the following files:

  • %Desktop%\{malware filename}_.DIR
  • %Desktop%\{malware filename}_.IGR
  • %Desktop%\{malware filename}_.IGP
  • %User Temp%{malware filename}\InitLnk.Txt
  • %User Temp%{malware filename}\KillProc.Txt
  • %User Temp%{malware filename}\MatchLnk.Txt
  • %User Temp%{malware filename}\SaveReg.Txt
  • %User Temp%{malware filename}\Data.Dat

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

  SOLUTION

Minimum Scan Engine: 9.800
FIRST VSAPI PATTERN FILE: 8.334.02
FIRST VSAPI PATTERN DATE: 05 Aug 2011
VSAPI OPR PATTERN File: 8.335.00
VSAPI OPR PATTERN Date: 06 Aug 2011

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

Identify and terminate files detected as RTKT_XCP.B

[ Learn More ]
  1. Windows Task Manager may not display all running processes. In this case, please use a third-party process viewer, preferably Process Explorer, to terminate the malware/grayware/spyware file. You may download the said tool here.
  2. 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.
  3. If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.

Step 4

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.  
  • %Desktop%\{malware filename}_.DIR
  • %Desktop%\{malware filename}_.IGR
  • %Desktop%\{malware filename}_.IGP
  • %User Temp%{malware filename}\InitLnk.Txt
  • %User Temp%{malware filename}\KillProc.Txt
  • %User Temp%{malware filename}\MatchLnk.Txt
  • %User Temp%{malware filename}\SaveReg.Txt
  • %User Temp%{malware filename}\Data.Dat

Step 5

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