Modified by: Emilio Marcel Garcia
ALIASES:

Trojan:Win32/Gozi.MR!MTB (MICROSOFT); HEUR:Trojan-Banker.Win32.Gozi.pef (KASPERSKY)

 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: 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.

  TECHNICAL DETAILS

File Size: 722,169 bytes
File Type: EXE
Memory Resident: No
Initial Samples Received Date: 15 Apr 2020
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 adds the following processes:

  • %Windows%\sysWOW64\wbem\wmiprvse.exe -secured -Embedding
  • "%System Root%\Program Files\Internet Explorer\iexplore.exe" -Embedding

(Note: %Windows% is the Windows folder, where it usually is C:\Windows on all Windows operating system versions.. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.)

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

  • Local\{GUID}

Other System Modifications

This Trojan Spy adds the following registry entries:

HKEY_USERS\{User SID}\Software\
Microsoft\Internet Explorer\Main
IE10RunOnceLastShown = 1

HKEY_USERS\{User SID}\Software\
Microsoft\Internet Explorer\Main
IE10RunOnceLastShown_TIMESTAMP = {binary data}

HKEY_USERS\{User SID}\Software\
Microsoft\Internet Explorer\Main
IE8RunOnceLastShown = 1

HKEY_USERS\{User SID}\Software\
Microsoft\Internet Explorer\Main
IE8RunOnceLastShown_TIMESTAMP = {binary data}

HKEY_USERS\{User SID}\Software\
Microsoft\Internet Explorer\Main
Check_Associations = "no"

Information Theft

This Trojan Spy gathers the following data:

  • OS Type
  • OS Version
  • User Name
  • Computer Name
  • System Uptime
  • Machine GUID

Stolen Information

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

  • https://{BLOCKED}cos.xyz/index.htm

  SOLUTION

Minimum Scan Engine: 9.850
FIRST VSAPI PATTERN FILE: 15.807.00
FIRST VSAPI PATTERN DATE: 15 Apr 2020
VSAPI OPR PATTERN File: 15.807.00
VSAPI OPR PATTERN Date: 15 Apr 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:

     
    • Troj.Win32.TRX.XXPE50FFF034

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

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.

  • In HKEY_USERS\{User SID}\Software\Microsoft\Internet Explorer\Main
    • Check_Associations = "no"

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TrojanSpy.Win32.URSNIF.THDAEBO. 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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