Analysis by: Jon Dexter Laurin
ALIASES:

Trojan-Dropper.MSIL (Ikarus); Trojan-Dropper.MSIL.Agent.anaj (Kaspersky); Trojan:MSIL/RapidStealer.A (Microsoft); rojan.Win32.Generic!BT (Sunbelt);

 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.

  TECHNICAL DETAILS

File Size: 1,159,680 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
  • %User Temp%\Cab{random number}.tmp - deleted afterwards
  • %User Temp%\Tar{random number}.tmp - deleted afterwards
  • %User Temp%\IXP000.TMP\IntelRapidStart.exe - deleted afterwards, detected as HKTL_STEAL
  • %User Temp%\IXP000.TMP\IntelRapidStart.exe.config - deleted afterwards

(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.. %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.)

It drops and executes the following files:

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

(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 the following non-malicious files:

  • %User Temp%\psiphon3.exe
  • %User Temp%\psiphon3-plonk.exe
  • %User Temp%\psiphon3-polipo.exe
  • %Application Data%\PUTTY.RND
  • %AppDataLocal%\PUTTY.RND
  • %User Profile%\PUTTY.RND

(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.. %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.. %AppDataLocal% is the Application Data folder found in Local Settings, where it is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000, Windows Server 2003, and Windows XP (32- and 64-bit); C:\Users\{user name}\AppData\Local 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.. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000, XP, and Server 2003, or C:\Users\{user name} on Windows Vista and 7.)

It creates the following folders:

  • %Application Data%\InterRapidStart
  • %Application Data%\IntelRapidStart\ume
  • %User Temp%\IXP000.TMP

(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.. %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.)

NOTES:

This spyware is re-bundled with a non-malicious application. It encrypts the file that contain the stolen information it gathers.

It adds the following non-malicious registry keys created by the non-malicious component of the package:

HKEY_CURRENT_USER\Software\Psiphon3\
HKEY_CURRENT_USER\Software\SimonTatham
HKEY_CURRENT_USER\Software\SimonTatham\PuTTY
HKEY_CURRENT_USER\Software\SimonTatham\SshHostKey

It adds the following non-malicious registry entries created by the non-malicious component of the package:

HKEY_CURRENT_USER\Software\Psiphon3
Value = "LastConnected"
Data = "{Date and Timezone}"
Value = "ServersOSSH"
Data = "{Random Number}"
Value = "ServersSSH"
Data = "{Random Number}"
Value = "ServersVPN"
Data = "{Random Number}"
Value = "Transport"
Data = "{VPN/SSH/SSH+}"
Value = "UserLocalHTTPProxyPort"
Data = "{Hex Value}"
Value = "UserSkipBrowser"
Data = "0"
Value = "UserSkipProxySettings"
Data = "0"
Value = "UserSkipSSHParentProxySettings"
Data = "0"
Value = "UserSSHParentProxyHostname"
Data = ""
Value = "UserSSHParentProxyPassword"
Data = ""
Value = "UserSSHParentProxyPort"
Data = "0"
Value = "UserSSHParentProxyType"
Data = "https"
Value = "UserSSHParentProxyUserName"
Data = ""

HKEY_CURRENT_USER\Software\SimonTatham\SshHostKey
Value = "rsa2@{random number}@{random number}:{IP Addresses}"
Data = "0x10001, {Random Hex Values}"

This spyware sends the stolen information to the following URLs:

  • window.{BLOCKED}irror.com:81
  • {BLOCKED}.{BLOCKED}.227.197:21

  SOLUTION

Minimum Scan Engine: 9.750
FIRST VSAPI PATTERN FILE: 11.820.07
FIRST VSAPI PATTERN DATE: 29 Jul 2015
VSAPI OPR PATTERN File: 11.821.00
VSAPI OPR PATTERN Date: 30 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

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

    HKTL_STEAL

Step 4

Restart in Safe Mode

[ Learn More ]

Step 5

Delete this registry key

[ Learn More ]

Important: Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this step only if you know how or you can ask assistance from your system administrator. Else, check this Microsoft article first before modifying your computer's registry. Before you could do this, you must restart in Safe Mode. For instructions on how to do this, you may refer to this page If the preceding step requires you to restart in safe mode, you may proceed to edit the system registry.

  • In HKEY_CURRENT_USER\Software
    • Psiphon3
  • In HKEY_CURRENT_USER\Software
    • SimonTatham

Step 6

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
  • %User Temp%\IXP000.TMP

Step 7

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%\psiphon3.exe
  • %User Temp%\psiphon3-plonk.exe
  • %User Temp%\psiphon3-polipo.exe
  • %Application Data%\PUTTY.RND
  • %AppDataLocal%\PUTTY.RND
  • %User Profile%\PUTTY.RND
  • %User Temp%\Cab{random number}.tmp
  • %User Temp%\Tar{random number}.tmp

Step 8

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

NOTES:

You may opt to not delete the registry entries since these are created by the non-malicious component of the package and are not malicious.


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