TSPY_BEBLOH.AAACT

 Analysis by: Michael Jay Villanueva

 ALIASES:

Win32/Spy.Bebloh.K (ESET-NOD32), W32/Bebloh.K!tr.spy (Fortinet)

 PLATFORM:

Windows

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

  • Threat Type: Spyware

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Spammed via email, Dropped by other malware


This spyware arrives as an attachment to email messages spammed by other malware/grayware or malicious users. It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

It does not have any propagation routine.

It does not have any backdoor routine.

It modifies the Internet Explorer Zone Settings.

It executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

It connects to certain websites to send and receive information. It gathers information and reports it to its servers.

  TECHNICAL DETAILS

File Size:

291,879 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

12 Jul 2016

Payload:

Connects to URLs/IPs, Downloads files

Arrival Details

This spyware arrives as an attachment to email messages spammed by other malware/grayware or malicious users.

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 spyware drops the following copies of itself into the affected system:

  • %Application Data%\{random string}.exe
    (Note: Creation of this copy is triggered when the affected system is shutting down)

(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 adds the following mutexes to ensure that only one of its copies runs at any one time:

  • Global\Uz{hex values}

It injects codes into the following process(es):

  • explorer.exe

Autostart Technique

This spyware creates the following registry entries to enable automatic execution of dropped component at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
{random string} = "%Application Data%\{random string}.lnk”
(Note: Creation of this registry entry is triggered when the affected system is shutting down)

Other System Modifications

This spyware adds the following registry keys:

HKEY_CURRENT_USER\Software\{random key}

It adds the following registry entries:

HKEY_CURRENT_USER\Software\{random key}
{random value} = "{hex values}"

HKEY_CURRENT_USER\Software\{random key}
(Default) = "{hex values}"

Propagation

This spyware does not have any propagation routine.

Backdoor Routine

This spyware does not have any backdoor routine.

Web Browser Home Page and Search Page Modification

This spyware modifies the Internet Explorer Zone Settings.

Dropping Routine

This spyware drops the following files:

  • %Application Data%\{random string}.lnk <- points to the copy
    (Note: Creation of this file is triggered when the affected system is shutting down, appends parameter "-autorun" to executed copy)

(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.)

Download Routine

This spyware connects to the following website(s) to download and execute a malicious file:

  • http://{BLOCKED}eischoedl.de/html/runtime_os.exe
  • http://{BLOCKED}eischoedl.de/html/specials.exe

It saves the files it downloads using the following names:

  • %User Temp%\runtime_os.exe
  • %User Temp%\specials.exe

(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.)

Trend Micro detects the dowloaded file as:

  • Variant of TSPY_URSNIF
  • Variant of BKDR_PUSHDO

It then executes the downloaded files. As a result, malicious routines of the downloaded files are exhibited on the affected system.

Stolen Information

This spyware sends the gathered information via HTTP POST to the following URL:

  • https://{BLOCKED}c1.com/auth/?tver={value}&vcmd={value}&cc={value}&hh={hex value}&ipcnf={ip address}+&sckport={value}&pros={value}&prgid={value}&keret={value};&email=

Other Details

This spyware connects to the following URL(s) to check for an Internet connection:

  • www.google.com

It connects to the following website to send and receive information:

  • {Random Generated Domain}.com
  • {Random Generated Domain}.net
  • https://{BLOCKED}pc1.com/auth/

It does the following:

  • Update itself
  • It does not proceed to its malicious routine if it detects that it is running in a VMWare environment
  • It deletes the cache files of Google Chrome and Mozilla Firefox
  • It monitors the following files to steal sensitive information, such as user names and passwords:
    • iexplore.exe
    • explorer.exe
    • myie.exe
    • firefox.exe
    • ftpte.exe
    • coreftp.exe
    • filezilla.exe
    • TOTALCMD.EXE
    • cftp.exe
    • FTPVoyager.exe
    • SmartFTP.exe
    • WinSCP.exe
    • chrome.exe
    • opera.exe
    • chrome.dll
    • thebat.exe
    • msimn.exe
    • nsp4.dll
    • nss3.dll
    • Outlook.exe
  • This malware monitors websites of banks and/or financial institutions based on its configuration file received from the C&C server.

It gathers the following information and reports it to its servers:

  • Email addresses from Windows Address Book (WAB)
  • User Credentials (FTP, Browser, Email)
  • Machine Name
  • OS Information (Version, Product ID, Name, Install Date)
  • Explorer File Information
  • Volume Serial Number
  • Network Configuration (IP address, Socket, Ports)
  • Keyboard Layout

NOTES:

The download URL and downloaded file may change based on the response from the C&C communication.

It does not have rootkit capabilities.

It does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.800

FIRST VSAPI PATTERN FILE:

12.646.02

FIRST VSAPI PATTERN DATE:

12 Jul 2016

VSAPI OPR PATTERN File:

12.647.00

VSAPI OPR PATTERN Date:

13 Jul 2016

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

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
    • {random key}

Step 5

Delete this registry value

[ 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.

  • In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
    • {random string} = "%Application Data%\{random string}.lnk"

Step 6

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

    • Variant of BKDR_PUSHDO
    • Variant of TSPY_URSNIF

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.
  • %Application Data%\{random string}.lnk

Step 8

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

Step 9

Reset Internet security settings

[ Learn More ]


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