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HackTool.Win64.KillAV.B

October 07, 2024
 Analysis by: Raymart Christian Yambot
 ALIASES:

Application.HackTool.BCS (BITDEFENDER)

 PLATFORM:

Windows

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

  • Threat Type: Hacking Tool

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Dropped by other malware, Downloaded from the Internet


This Hacking Tool 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:

299,008 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

30 Sep 2024

Payload:

Disables AV, Terminates processes

Arrival Details

This Hacking Tool arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Other System Modifications

This Hacking Tool modifies the following registry entries:

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows Defender
DisableAntiSpyWare = 1

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows\CurrentVersion\Explorer\
StartupApproved\Run
Security Health = 1

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows Defender
DisableAntiSpyware = 1

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\
Services\WinDefend
DisableAntiSpyware = 1

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows Defender\Real-Time Protection
DisableRealtimeMonitoring = 1

(Note: The default value data of the said registry entry is 0.)

HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\
Windows Defender
TamperProtection = 1

(Note: The default value data of the said registry entry is 0.)

Process Termination

This Hacking Tool terminates the following services if found on the affected system:

  • WinDefend

It terminates the following processes if found running in the affected system's memory:

  • smartscreen.exe

Other Details

This Hacking Tool does the following:

  • It checks the local system account to see if it has the following security identifier (SID):
    • S-1-5-18
  • It requires being executed with Administrative privileges to proceed with its routine.
  • It disables the following features of Windows Defender:
    • DisableAntiSpyware
    • DisableAntiVirus
    • DisableArchiveScanning
    • DisableBehaviorMonitoring
    • DisableBlockAtFirstSeen
    • DisableIOAVProtection
    • DisableIntrusionPreventionSystem
    • DisablePrivacyMode
    • DisableRealtimeMonitoring
    • DisableScriptScanning

  SOLUTION

Minimum Scan Engine:

9.800

SSAPI PATTERN File:

2.767.00

SSAPI PATTERN Date:

26 Sep 2024

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

Scan your computer with your Trend Micro product to delete files detected as HackTool.Win64.KillAV.B. 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:

Step 4

Restore these modified registry values

[ Learn More ]

Important:Editing the Windows Registry incorrectly can lead to irreversible system malfunction. Please do this only if you know how to or you can seek your system administrator's help. You may also check out this Microsoft article first before modifying your computer's registry.

 
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender
  • DisableAntiSpyWare = 1
  • DisableAntiSpyWare = 0
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartupApproved\Run
  • Security Health = 1
  • Security Health = 0
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\
  • DisableAntiSpyware = 1
  • DisableAntiSpyware = 0
  • HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\WinDefend
  • DisableAntiSpyware = 1
  • DisableAntiSpyware = 0
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender\Real-Time Protection
  • DisableRealtimeMonitoring = 1
  • DisableRealtimeMonitoring = 0
  • HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows Defender
  • TamperProtection = 0
  • TamperProtection = 1


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