TSPY_RSTEALER.D

October 30, 2015
 Analysis by: Janus Agcaoili
 ALIASES:

Infostealer (Symantec), Trojan:MSIL/RapidStealer.A!dha (Microsoft), Trojan-Spy.MSIL.Stealer.b (Kaspersky), W32/RapidStealer.A!tr.spy (Fortinet)

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet

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.

It encrypts the log files that contain the information it gathers.

  TECHNICAL DETAILS

File Size:

1,024,000 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

14 May 2014

Payload:

Connects to URLs/IPs

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 drops the following component file(s):

  • %Application Data%\IntelRapidStart\DelphiNative.dll - detected as TSPY_RSTEALER.B
  • %Application Data%\IntelRapidStart\RapidStartTech.stl
  • %Application Data%\IntelRapidStart\IntelRS.exe.config

(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.)

It drops and executes the following files:

  • %Application Data%\IntelRapidStart\IntelRS.exe - detected as TSPY_RSTEALER.A
  • %Application Data%\IntelRapidStart\AppTransferWiz.dll - detected as TSPY_RSTEALER.A

(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.)

It creates the following folders:

  • %Application Data%\InterRapidStart
  • %Application Data%\IntelRapidStart\ume

(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.)

Dropping Routine

This spyware drops the following files:

  • %User Temp%\Koala.jpg <- Will be opened upon execution

(Note: %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.)

Information Theft

This spyware gathers the following data:

  • System Information and Data:
    • Computer Name
    • Computer Username
    • Computer Timezone
    • Languages Installed
    • Open Ports
    • Installed Applications
    • Running Process
    • Remote Desktop Accounts
    • Internal IP Addresses
    • Public IP Addresses
    • Keylogs
    • Screenshot
    • Clipboard Data
  • Web Browser Information (Google Chrome, Firefox, Internet Explorer, Opera):
    • Bookmarks
    • Cookies
    • Histories
    • Store Passwords
    • Proxies
  • Instant Messenger Information (Gtalk, Pidgin, Skype, Yahoo Messenger):
    • Username
    • Password

Stolen Information

This spyware saves the stolen information in the following file:

  • %Application Data%\IntelRapidStart\ume\Log_{Computer Name}_{Date}_{Time}.Enc
  • %Application Data%\IntelRapidStart\ume\Img_{Computer Name}_{Date}_{Time}.Enc
  • %Application Data%\IntelRapidStart\ume\Pass_{Computer Name}_{Date}_{Time}.Enc
  • %Application Data%\IntelRapidStart\ume\Messenger_{Computer Name}_{Date}_{Time}.Enc
  • %Application Data%\IntelRapidStart\ume\SysInfo_{Computer Name}_{Date}_{Time}.Enc
  • %Application Data%\IntelRapidStart\ume\Browser_{Computer Name}_{Date}_{Time}.Enc
  • %Application Data%\IntelRapidStart\ume\Prx_{Computer Name}_{Date}_{Time}.Enc

(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.)

It sends the gathered information via HTTP POST to the following URL:

  • {BLOCKED}ms.ir:21
  • {BLOCKED}date.com:21

Other Details

This spyware encrypts the log files that contain the information it gathers.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

10.794.08

FIRST VSAPI PATTERN DATE:

14 May 2014

VSAPI OPR PATTERN File:

10.795.00

VSAPI OPR PATTERN Date:

15 May 2014

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 malware/grayware files dropped/downloaded by TSPY_RSTEALER.D. (Note: Please skip this step if the threats listed below have already been removed.)

    TSPY_RSTEALER.A
    TSPY_RSTEALER.B

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.
  • %Application Data%\InterRapidStart

Step 6

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.  %User Temp%\Koala.jpg

Step 7

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