RiskWare.IFEOHijack

Short bio

RiskWare.IFEOHijack is a generic detection for programs that set a debugger for other executables by using the following registry key:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\
CurrentVersion\Image File Execution Options\
{name of the intercepted executable}

When an executable is listed under the IMAGE FILE EXECUTION OPTIONS key and it has a debugger value set, Windows always checks under that key what the valuedata is and launches that “debugger” instead of the executable.

Some legitimate programs that use this method have been whitelisted.

Type and source of infection

RiskWare.IFEOHijack could be a flag for more serious problems. By setting a debugger for an executable, you basically intercept any calls to that executable and run another executable instead. The debugger is often set for taskmanager.exe.

The debugger setting flagged by RiskWare.IFEOHijack can be made by legitimate substitutes for the Windows Task Manager, but it can also be done by malware that doesn’t want the user to find a suspicious process in the list shown by the Task Manager.

Aftermath

The presence of RiskWare.IFEOHijack should be grounds for an investigation. Users should look at the intercepted executable and the executable set as a debugger to see whether there’s reason to take further action. The Malwarebytes log will tell you which executable was intercepted, and by looking in the registry, you can see the executable set as a debugger.

find debugger

Protection

RiskWare.IFEOHijack is a “removal only” detection name. That means users must make the call themselves whether or not to remove the program flagged by Malwarebytes. If users wish to keep the program, they may add it to exclusions.

Remediation

Malwarebytes can detect and remove RiskWare.IFEOHijack without further user interaction.

  1. Please download Malwarebytes to your desktop.
  2. Double-click MBSetup.exe and follow the prompts to install the program.
  3. When your Malwarebytes for Windows installation completes, the program opens to the Welcome to Malwarebytes screen.
  4. Click on the Get started button.
  5. Click Scan to start a Threat Scan.
  6. Click Quarantine to remove the found threats.
  7. Reboot the system if prompted to complete the removal process.

Add an exclusion

When RiskWare.IFEOHijack is detected on your computer, Malwarebytes for Windows does not know if it was authorized. Optimization software, malware, and Potentially Unwanted Programs (PUPs) are known to make these types of changes, hence they are regarded as riskware.

To have Malwarebytes for Windows ignore RiskWare.IFEOHijack, you must add RiskWare.IFEOHijack to the Allow list. Here’s how to do it.

  1. When RiskWare.IFEOHijack appears in the list of Scan results. PUM detected
  2. Uncheck the entry or entries related to RiskWare.IFEOHijack.
  3. Then click on Next.
  4. You will see a prompt giving you several options.
  5. Choosing Always ignore will add RiskWare.IFEOHijack to the Allow List.
  6. You can remove them there when you decide they should no longer be ignored.
  7. When RiskWare.IFEOHijack is on the Allow list it will no longer show up in your Scan results.

Malwarebytes removal log

A Malwarebytes log of removal will look similar to this:

Malwarebytes
www.malwarebytes.com

-Log Details-
Scan Date: 8/23/19
Scan Time: 1:09 PM
Log File: 7b575d06-c596-11e9-a4f2-00ffdcc6fdfc.json

-Software Information-
Version: 3.8.3.2965
Components Version: 1.0.613
Update Package Version: 1.0.12151
License: Premium

-System Information-
OS: Windows 7 Service Pack 1
CPU: x64
File System: NTFS
User: METALLICA-PC\Metallica

-Scan Summary-
Scan Type: Threat Scan
Scan Initiated By: Manual
Result: Completed
Objects Scanned: 236215
Threats Detected: 4
Threats Quarantined: 4
Time Elapsed: 6 min, 51 sec

-Scan Options-
Memory: Enabled
Startup: Enabled
Filesystem: Enabled
Archives: Enabled
Rootkits: Enabled
Heuristics: Enabled
PUP: Detect
PUM: Detect

-Scan Details-
Process: 0
(No malicious items detected)

Module: 0
(No malicious items detected)

Registry Key: 2
RiskWare.IFEOHijack, HKLM\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS NT\CURRENTVERSION\IMAGE FILE EXECUTION OPTIONS\WINUPDATE.EXE, Delete-on-Reboot, [6321], [250029],1.0.12151
RiskWare.IFEOHijack, HKLM\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\IMAGE FILE EXECUTION OPTIONS\WINUPDATE.EXE, Delete-on-Reboot, [6321], [250029],1.0.12151

Registry Value: 2
RiskWare.IFEOHijack, HKLM\SOFTWARE\WOW6432NODE\MICROSOFT\WINDOWS NT\CURRENTVERSION\IMAGE FILE EXECUTION OPTIONS\WINUPDATE.EXE|DEBUGGER, Delete-on-Reboot, [6321], [250029],1.0.12151
RiskWare.IFEOHijack, HKLM\SOFTWARE\MICROSOFT\WINDOWS NT\CURRENTVERSION\IMAGE FILE EXECUTION OPTIONS\WINUPDATE.EXE|DEBUGGER, Delete-on-Reboot, [6321], [250029],1.0.12151

Registry Data: 0
(No malicious items detected)

Data Stream: 0
(No malicious items detected)

Folder: 0
(No malicious items detected)

File: 0
(No malicious items detected)

Physical Sector: 0
(No malicious items detected)

WMI: 0
(No malicious items detected)


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