Analysis by: John Anthony Banes
 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel: Dropped by other malware, Downloaded from the Internet

This Trojan Spy 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: 737,280 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 08 May 2018
Payload: Connects to URLs/IPs, Steals information

Arrival Details

This Trojan Spy 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 Spy drops the following copies of itself into the affected system and executes them:

  • %User Temp%\subfolder\filename.bat

(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.)

It drops the following files:

  • %User Temp%\subfolder\filename.vbs -> script to run the copy of itself
  • %Application Data%\pidloc.txt -> contains the full path and name of malware
  • %Application Data%\pid.txt -> contains the process ID of the malware
  • %User Temp%\holdermail.txt -> deleted afterwards
  • %User Temp%\holderwb.txt -> deleted afterwards

(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.)

It adds the following processes:

  • %Windows%\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "%User Temp%\holdermail.txt"
  • %Windows%\Microsoft.NET\Framework\v2.0.50727\vbc.exe /stext "%User Temp%\holderwb.txt"

(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.)

Autostart Technique

This Trojan Spy adds the following registry entries to enable its automatic execution at every system startup:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
Registry Key Name = %User Temp%\subfolder\filename.vbs

Other System Modifications

This Trojan Spy modifies the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Explorer\
Advanced
Hidden = "1"

Information Theft

This Trojan Spy gathers the following data:

  • Computer name
  • Local Date and Time
  • Installed Language
  • .Net Version
  • Operating System Platform
  • Operating System Version
  • Internal IP Address
  • External IP Address
  • Installed Antivirus
  • Installed Firewall
  • Key logs
  • Clipboard logs
  • Screenshot
  • Account information from:
    • Bitcoin
    • Minecraft
    • Steam
    • Internet Download Manager
    • jDownloader
    • RuneScape

It attempts to steal stored email credentials from the following:

  • Thunderbird
  • Eudora
  • Internet Account Manager
  • MS Outlook
  • Outlook Express
  • Group Mail Free
  • IncrediMail
  • Windows Mail
  • Windows Live Mail
  • Yahoo! Mail
  • Gmail
  • Facebook

It attempts to get stored information such as user names, passwords, and hostnames from the following browsers:

  • Internet Explorer
  • Firefox
  • Chrome
  • Opera
  • Safari
  • SeaMonkey

Stolen Information

This Trojan Spy sends the data it gathers to the following email addresses via SMTP:

  • bomba111@{BLOCKED}o.com

Other Details

This Trojan Spy connects to the following URL(s) to get the affected system's IP address:

  • http://whatismyipaddress.com/

It does the following:

  • It attempts to steal stored account credentials from the following Instant Messaging applications:
    • Google Talk
    • MSN Messenger

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 14.252.01
FIRST VSAPI PATTERN DATE: 14 May 2018
VSAPI OPR PATTERN File: 14.253.00
VSAPI OPR PATTERN Date: 15 May 2018

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 TSPY_GOLROTED.BBOCB

[ 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

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\RunOnce
    • Registry Key Name = %User Temp%\subfolder\filename.vbs

Step 5

Restore this modified 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\Explorer\Advanced
    • From: Hidden = "1"
      To: Hidden = {User Preference}

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%\subfolder\filename.vbs
  • %Application Data%\pidloc.txt
  • %Application Data%\pid.txt
  • %User Temp%\holdermail.txt
  • %User Temp%\holderwb.txt

Step 7

Scan your computer with your Trend Micro product to delete files detected as TSPY_GOLROTED.BBOCB. 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 the following Trend Micro Support pages for more information:


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