TrojanSpy.MSIL.GOLROTED.BABDC

February 11, 2020
 Analysis by: Patrick Noel Collado
 ALIASES:

Backdoor:MSIL/Bladabindi!rfn (Microsoft); HEUR:Trojan-Spy.MSIL.AveMaria.gen (Kaspersky)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware

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.

It steals certain information from the system and/or the user. It steals sensitive information such as user names and passwords related to certain games.

  TECHNICAL DETAILS

File Size:

1,046,528 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

19 Jan 2020

Payload:

Drops files

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 files:

  • %Application Data%\WindowsUpdate.exe
  • %Application Data%\pid.txt
  • %Application Data%\pidloc.txt

(Note: %Application Data% is the current user's Application Data folder, which is usually C:\Documents and Settings\{user name}\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Roaming on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

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\Run
Windows Update = %Application Data%\WindowsUpdate.exe

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 steals the following information:

  • Bitcoin wallet
  • List of AV Products
  • List of Firewall Products
  • Language
  • OS Name
  • OS Version
  • OS Platform
  • Computer Name
  • Processor ID

It steals sensitive information such as user names and passwords related to the following games:

  • Minecraft credentials
  • RuneScape Bank Pins

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

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

It attempts to steal stored email credentials from the following:

  • Thunderbird Mail
  • Eudora
  • MS Outlook
  • Outlook Express
  • IncrediMail
  • Internet Account Manager
  • Windows Mail
  • Windows Live Mail
  • Yahoo! Mail
  • Group Mail Free
  • Netscape Mail
  • Hotmail/MSN
  • Gmail

Stolen Information

This Trojan Spy saves the stolen information in the following file:

  • %User Temp%\wallet.dat <- file that holds the user's bitcoin currency
  • %User Temp%\holdermail.txt <- contains the stolen email credentials
  • %User Temp%\holderwb.txt <-contains the stolen information from web browsers

(Note: %User Temp% is the current user's Temp folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Temp on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local\Temp on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It sends the data it gathers to the following email addresses via SMTP:

  • {BLOCKED}y@brightsteelfactory.com

Other Details

This Trojan Spy does the following:

  • The email has the following characteristics:
    • Uses any of the following strings as it's subject:
      • HawkEye Keylogger | BitCoin Stealer | {Computer Name} | {Processor ID}
      • HawkEye Keylogger | MineCraft Stealer | {Computer Name} | {Processor ID}
      • HawkEye Keylogger | RuneScape Stealer | {Computer Name} | {Processor ID}
      • HawkEye Keylogger | Keylog Records | {Computer Name} | {Processor ID}
      • HawkEye Keylogger | Execution Confirmed | {Computer Name} | {Processor ID}
      • HawkEye Keylogger | Stealer Records | {Computer Name} | {Processor ID}
    • The email body contains the stolen information
    • The email uses 5PZK@M8dou@H as the password

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.670.05

FIRST VSAPI PATTERN DATE:

07 Feb 2020

VSAPI OPR PATTERN File:

15.671.00

VSAPI OPR PATTERN Date:

08 Feb 2020

Step 1

Trend Micro Predictive Machine Learning detects and blocks malware at the first sign of its existence, before it executes on your system. When enabled, your Trend Micro product detects this malware under the following machine learning name:

Step 2

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 3

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 4

Identify and terminate files detected as TrojanSpy.MSIL.GOLROTED.BABDC

[ 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 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
    • Windows Update = %Application Data%\WindowsUpdate.exe

Step 6

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 7

Search and delete these files

[ 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%\WindowsUpdate.exe
  • %User Temp%\SysInfo.txt
  • %Application Data%\pid.txt
  • %Application Data%\pidloc.txt
  • %User Temp%\wallet.dat
  • %User Temp%\holdermail.txt
  • %User Temp%\holderwb.txt

Step 8

Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.MSIL.GOLROTED.BABDC . 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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