TrojanSpy.Win32.FAREIT.UHBAZCLIS

February 11, 2020
 ALIASES:

VirTool:Win32/Injector.AN (Microsoft); Mal/VBCheMan-C, Mal/VBCheMan-C (Sophos)

 PLATFORM:

Windows

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

  • Threat Type: Trojan Spy

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

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:

188,416 bytes

File Type:

EXE

Memory Resident:

Yes

Initial Samples Received Date:

11 Feb 2020

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 creates the following folders:

  • %System Root%\process

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

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
4X2YZW9UZIWEVE7WEMELTG = "%System Root%\process\FC78BA65645.exe"

Other System Modifications

This Trojan Spy deletes the following files:

  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\cookies-nontor.xml
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\cookies.sqlite-journal
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\cookies.sqlite
  • %AppDataLocal%\Microsoft\Windows\WebCache\V0100107.log
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\sessionstore.js
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\sessionstore.bak
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\cookies.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).. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

It adds the following registry entries:

HKEY_CURRENT_USER\Software\Microsoft Windows
000000544B562374 = "{random characters}"

HKEY_CURRENT_USER\Software\Microsoft Windows
00000054ED520807 = "{random characters}"

HKEY_CURRENT_USER\Software\Microsoft Windows
0000005D13BD7654 = "{random characters}"

Dropping Routine

This Trojan Spy drops the following files:

  • %User Temp%\6SQFC19.exe
  • %System Root%\process
  • %AppDataLocal%\Microsoft\Windows\WebCache\V01.log
  • %AppDataLocal%\Microsoft\Windows\WebCache\V010010A.log
  • %AppDataLocal%\Microsoft\Windows\WebCache\V01tmp.log
  • %User Temp%\6SQA7F1.exe
  • %AppDataLocal%\Microsoft\Windows\WebCache\V0100108.log
  • %System Root%\process\25B47000A80F07C
  • %AppDataLocal%\Microsoft\Windows\WebCache\V0100109.log
  • %System Root%\process\FC78BA65645.exe

(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).. %System Root% is the Windows root folder, where it usually is C:\ on all Windows operating system versions.. %AppDataLocal% is the Local Application Data folder, which is usually C:\Documents and Settings\{user name}\Local Settings\Application Data on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name}\AppData\Local on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).)

Other Details

This Trojan Spy connects to the following possibly malicious URL:

  • http://www.{BLOCKED}oft.com
  • http://{BLOCKED}y.biz
  • http://{BLOCKED}rls.com
  • http://{BLOCKED}rmore.com
  • http://{BLOCKED}o.com
  • {BLOCKED}17.237

This report is generated via an automated analysis system.

  SOLUTION

Minimum Scan Engine:

9.850

Step 1

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 2

Restart in Safe Mode

[ Learn More ]

Step 3

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
    • 4X2YZW9UZIWEVE7WEMELTG = "%System Root%\process\FC78BA65645.exe"
  • In HKEY_CURRENT_USER\Software\Microsoft Windows
    • 000000544B562374 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\Microsoft Windows
    • 00000054ED520807 = "{random characters}"
  • In HKEY_CURRENT_USER\Software\Microsoft Windows
    • 0000005D13BD7654 = "{random characters}"

Step 4

Search and delete these components

[ Learn More ]
There may be some components 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%\6SQFC19.exe
  • %System Root%\process
  • %AppDataLocal%\Microsoft\Windows\WebCache\V01.log
  • %AppDataLocal%\Microsoft\Windows\WebCache\V010010A.log
  • %AppDataLocal%\Microsoft\Windows\WebCache\V01tmp.log
  • %User Temp%\6SQA7F1.exe
  • %AppDataLocal%\Microsoft\Windows\WebCache\V0100108.log
  • %System Root%\process\25B47000A80F07C
  • %AppDataLocal%\Microsoft\Windows\WebCache\V0100109.log
  • %System Root%\process\FC78BA65645.exe

Step 5

Search and delete this folder

[ 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.
  • %System Root%\process

Step 6

Restart in normal mode and scan your computer with your Trend Micro product for files detected as TrojanSpy.Win32.FAREIT.UHBAZCLIS. 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 7

Restore this file from backup only Microsoft-related files will be restored. If this malware/grayware also deleted files related to programs that are not from Microsoft, please reinstall those programs on you computer again.

  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\cookies-nontor.xml
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\cookies.sqlite-journal
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\cookies.sqlite
  • %AppDataLocal%\Microsoft\Windows\WebCache\V0100107.log
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\sessionstore.js
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\sessionstore.bak
  • %Application Data%\Mozilla\Firefox\Profiles\lj5mikyj.default\cookies.txt


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