Trojan.MSIL.BLADABINDI.KNXRFL
Windows
Threat Type: Trojan
Destructiveness: No
Encrypted:
In the wild: Yes
OVERVIEW
This Trojan 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
507,904 bytes
EXE
Yes
18 Jan 2023
Arrival Details
This Trojan 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 adds the following folders:
- %Application Data%\Microsoft\Windows\ScreenToGif
- %Program Files%\Client
(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).. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It drops the following copies of itself into the affected system:
- %Application Data%\Microsoft\Windows\ScreenToGif\netprotocol.exe
- %Program Files%\Client\Core.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).. %Program Files% is the default Program Files folder, usually C:\Program Files in Windows 2000(32-bit), Server 2003(32-bit), XP, Vista(64-bit), 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit) , or C:\Program Files (x86) in Windows XP(64-bit), Vista(64-bit), 7(64-bit), 8(64-bit), 8.1(64-bit), 2008(64-bit), 2012(64-bit) and 10(64-bit).)
It drops the following files:
- %User Temp%\info.txt
- %User Profile%\Documents\man.log
- %Application Data%\Key\Guard\1
- %Application Data%\Key\Logs\{Installation Date}
(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).. %User Profile% is the current user's profile folder, which is usually C:\Documents and Settings\{user name} on Windows 2000(32-bit), XP, and Server 2003(32-bit), or C:\Users\{user name} on Windows Vista, 7, 8, 8.1, 2008(64-bit), 2012(64-bit) and 10(64-bit).. %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 adds the following processes:
- "%Application Data%\Microsoft\Windows\ScreenToGif\netprotocol.exe" -n
- "%Application Data%\Microsoft\Windows\ScreenToGif\netprotocol.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).)
Autostart Technique
This Trojan adds the following registry entries to enable its automatic execution at every system startup:
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\Run
Core = "%Program Files%\Client\Core.exe" -a /a
HKEY_CURRENT_USER\Software\Microsoft\
Windows\CurrentVersion\RunOnce
Core = "%Program Files%\Client\Core.exe" -a /a
Other System Modifications
This Trojan adds the following registry entries:
HKEY_CURRENT_USER\Software
DAbtpDn6Qc89/Wu874hE+w== = vX6BEbu9/Mj2l3cWLUGuh4ACugbxz7cCbTVn2/khk4k=
HKEY_CURRENT_USER\Software
Z7IalcDkDb5kxizgt1q3AQ== = 43NdHwZWgyEiRFMPDPNZ2w==
SOLUTION
9.800
18.206.03
20 Jan 2023
18.207.00
21 Jan 2023
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.XXPE50FFF064
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
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_CURRENT_USER\Software
- DAbtpDn6Qc89/Wu874hE+w== = vX6BEbu9/Mj2l3cWLUGuh4ACugbxz7cCbTVn2/khk4k=
- DAbtpDn6Qc89/Wu874hE+w== = vX6BEbu9/Mj2l3cWLUGuh4ACugbxz7cCbTVn2/khk4k=
- In HKEY_CURRENT_USER\Software
- Z7IalcDkDb5kxizgt1q3AQ== = 43NdHwZWgyEiRFMPDPNZ2w==
- Z7IalcDkDb5kxizgt1q3AQ== = 43NdHwZWgyEiRFMPDPNZ2w==
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Run
- Core = "%Program Files%\Client\Core.exe" -a /a
- Core = "%Program Files%\Client\Core.exe" -a /a
- In HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\RunOnce
- Core = "%Program Files%\Client\Core.exe" -a /a
- Core = "%Program Files%\Client\Core.exe" -a /a
Step 6
Search and delete these files
- %User Temp%\info.txt
- %User Profile%\Documents\man.log
- %Application Data%\Key\Guard\1
- %Application Data%\Key\Logs\{Installation Date}
- %Application Data%\Microsoft\Windows\ScreenToGif\netprotocol.exe
- %Program Files%\Client\Core.exe
Step 7
Search and delete this folder
- %Application Data%\Microsoft\Windows\ScreenToGif
- %Program Files%\Client
Step 8
Restart in normal mode and scan your computer with your Trend Micro product for files detected as Trojan.MSIL.BLADABINDI.KNXRFL. 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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