TrojanSpy.Win32.TRICKBOT.TIGOCFF
Trojan:Win32/TrickBot.CD!MTB (Microsoft); Trojan.Win32.Trickbot (Ikarus); Win32/TrickBot.CX (ESET-NOD32)
Windows
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
417,792 bytes
EXE
No
20 Dec 2019
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 folders:
- %Application Data%\taskhealth
(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).)
It drops the following files:
- %System%\Tasks\Task Health Application
(Note: %System% is the Windows system folder, where it usually is C:\Windows\System32 on all Windows operating system versions.)
It drops the following copies of itself into the affected system:
- %Application Data%\taskhealth\{Malware Filename}.exe
(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).)
Other System Modifications
This Trojan Spy adds the following registry keys:
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
Sketch
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
Sketch\Recent File List
HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications\
Sketch\Settings
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\DefaultIcon
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell\open
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell\open\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell\print
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell\print\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell\printto
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell\printto\
command
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.skh
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.skh\ShellNew
It adds the following registry entries:
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document
{Default} = Sketch Document
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\DefaultIcon
{Default} = {Malware Filename}.exe,1
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell\open\
command
{Default} = {Malware Filename}.exe "%1"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell\print\
command
{Default} = {Malware Filename}.exe /p "%1"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
Sketch.Document\shell\printto\
command
{Default} = {Malware Filename}.exe /pt "%1" "%2" "%3" "%4"
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.skh
{Default} = Sketch.Document
HKEY_LOCAL_MACHINE\SOFTWARE\Classes\
.skh\ShellNew
NullFile = ""
Other Details
This Trojan Spy does the following:
- It adds the following scheduled tasks:
- Task Name: Task Health Application
- Trigger: At system startup; repeat every 00:12:00 for a duration of 412.10:30:00
- Action: %Application Data%\taskhealth\{Malware Filename}.exe
(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).)
SOLUTION
9.850
15.576.06
23 Dec 2019
15.577.00
24 Dec 2019
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
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 TrojanSpy.Win32.TRICKBOT.TIGOCFF
- 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.
- 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.
- If the detected file is not displayed in either Windows Task Manager or Process Explorer, continue doing the next steps.
Step 4
Deleting Scheduled Tasks
The following {Task Name} - {Task to be run} listed should be used in the steps identified below:
- Task Name: Task Health Application
- Task to be run: %Application Data%\taskhealth\{Malware Filename}.exe
For Windows 2000, Windows XP, and Windows Server 2003:
- Open the Windows Scheduled Tasks. Click Start>Programs>Accessories>
System Tools>Scheduled Tasks. - Locate each {Task Name} values listed above in the Name column.
- Right-click on the said file(s) with the aforementioned value.
- Click on Properties. In the Run field, check for the listed {Task to be run}.
- If the strings match the list above, delete the task.
For Windows Vista, Windows 7, Windows Server 2008, Windows 8, Windows 8.1, and Windows Server 2012:
- Open the Windows Task Scheduler. To do this:
• On Windows Vista, Windows 7, and Windows Server 2008, click Start, type taskschd.msc in the Search input field, then press Enter.
• On Windows 8, Windows 8.1, and Windows Server 2012, right-click on the lower left corner of the screen, click Run, type taskschd.msc, then press Enter. - In the left panel, click Task Scheduler Library.
- In the upper-middle panel, locate each {Task Name} values listed above in the Name column.
- In the lower-middle panel, click the Actions tab. In the Details column, check for the {Task to be run} string.
- If the said string is found, delete the task.
Step 5
Delete this registry value
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_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document
- {Default} = Sketch Document
- {Default} = Sketch Document
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\DefaultIcon
- {Default} = {Malware Filename}.exe,1
- {Default} = {Malware Filename}.exe,1
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\shell\open\command
- {Default} = {Malware Filename}.exe "%1"
- {Default} = {Malware Filename}.exe "%1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\shell\print\command
- {Default} = {Malware Filename}.exe /p "%1"
- {Default} = {Malware Filename}.exe /p "%1"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\shell\printto\command
- {Default} = {Malware Filename}.exe /pt "%1" "%2" "%3" "%4"
- {Default} = {Malware Filename}.exe /pt "%1" "%2" "%3" "%4"
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.skh
- {Default} = Sketch.Document
- {Default} = Sketch.Document
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.skh\ShellNew
- NullFile = ""
- NullFile = ""
Step 6
Delete this registry key
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
- Local AppWizard-Generated Applications = ""
- Local AppWizard-Generated Applications = ""
- In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
- Sketch = ""
- Sketch = ""
- In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
- Sketch\Recent File List = ""
- Sketch\Recent File List = ""
- In HKEY_CURRENT_USER\Software\Local AppWizard-Generated Applications
- Sketch\Settings = ""
- Sketch\Settings = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- Sketch.Document = ""
- Sketch.Document = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document
- DefaultIcon = ""
- DefaultIcon = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document
- shell = ""
- shell = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\shell
- open = ""
- open = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\shell\open
- command = ""
- command = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\shell
- print = ""
- print = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\shell\print
- command = ""
- command = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\shell
- printto = ""
- printto = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\Sketch.Document\shell\printto
- command = ""
- command = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes
- .skh = ""
- .skh = ""
- In HKEY_LOCAL_MACHINE\SOFTWARE\Classes\.skh
- ShellNew = ""
- ShellNew = ""
Step 7
Search and delete this file
- %System%\Tasks\Task Health Application
- %Application Data%\taskhealth\{Malware Filename}.exe
Step 8
Search and delete this folder
- %Application Data%\taskhealth
Step 9
Scan your computer with your Trend Micro product to delete files detected as TrojanSpy.Win32.TRICKBOT.TIGOCFF. 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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