Analysis
- max time kernel
144s - max time network
151s - platform
windows10-2004_x64 - resource
win10v2004-20240426-en - resource tags
- submitted
10/05/2024, 00:29
General
- Target 2024-05-10_3d70017a2b6d0c6859d7004b651a5d7a_ryuk.exe
- Size 11.0MB
- Sample240510-aszynabb92
- SHA256 bc28a9c3ab8c1e7e13f6634c1eff7bed34d3dec2f5979f25101270303e69d06e
Malware Config
Extracted
-
bitrat
-
1.34
-
23.105.131.220:4898
-
communication_password
81dc9bdb52d04dc20036dbd8313ed055
-
tor_process
tor
Signatures
- BitRAT
BitRAT is a remote access tool written in C++ and uses leaked source code from other families.
- UPX dump on OEP (original entry point) 6 IoCs
- Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs
Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 13 IoCs
- UPX packed file 6 IoCs
Detects executables packed with UPX/modified UPX open source packer.
- Adds Run key to start application 2 TTPs 1 IoCs
- Suspicious use of NtSetInformationThreadHideFromDebugger 4 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Suspicious behavior: EnumeratesProcesses 2 IoCs
- Suspicious use of AdjustPrivilegeToken 2 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 9 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\2024-05-10_3d70017a2b6d0c6859d7004b651a5d7a_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-10_3d70017a2b6d0c6859d7004b651a5d7a_ryuk.exe"1⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\2024-05-10_3d70017a2b6d0c6859d7004b651a5d7a_ryuk.exe"C:\Users\Admin\AppData\Local\Temp\2024-05-10_3d70017a2b6d0c6859d7004b651a5d7a_ryuk.exe"2⤵
- Checks computer location settings
- Loads dropped DLL
- Adds Run key to start application
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" /c Add-MpPreference -ExclusionPath 'c:\users\admin\appdata\local\temp\Feedback406701'3⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
-
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C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "start /b ChromeFeedback.exe"3⤵
- Suspicious use of WriteProcessMemory
-
C:\Users\Admin\AppData\Local\Temp\Feedback406701\ChromeFeedback.exeChromeFeedback.exe4⤵
- Executes dropped EXE
- Suspicious use of NtSetInformationThreadHideFromDebugger
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
-
-
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
ChromeFeedback.exe
_cffi_backend.pyd
_ctypes.pyd
_hashlib.pyd
_socket.pyd
_ssl.pyd
bz2.pyd
cryptography.hazmat.bindings._openssl.pyd
cryptography.hazmat.bindings._padding.pyd
python27.dll
pythoncom27.dll
pywintypes27.dll
stub.exe.manifest
win32api.pyd
win32com.shell.shell.pyd
__PSScriptPolicyTest_xbx5hrcv.rcj.ps1
memory/2436-119-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/2436-115-0x00000000752A0000-0x00000000752D9000-memory.dmp
memory/2436-128-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/2436-127-0x00000000752A0000-0x00000000752D9000-memory.dmp
memory/2436-88-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/2436-124-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/2436-114-0x0000000074F20000-0x0000000074F59000-memory.dmp
memory/2436-123-0x00000000752A0000-0x00000000752D9000-memory.dmp
memory/2436-116-0x0000000000400000-0x00000000007E4000-memory.dmp
memory/2436-118-0x00000000752A0000-0x00000000752D9000-memory.dmp
memory/3148-66-0x00007FFFD2C03000-0x00007FFFD2C05000-memory.dmp
memory/3148-78-0x00007FFFD2C00000-0x00007FFFD36C1000-memory.dmp
memory/3148-67-0x0000026CEF2D0000-0x0000026CEF2F2000-memory.dmp
memory/3148-77-0x00007FFFD2C00000-0x00007FFFD36C1000-memory.dmp
memory/3148-81-0x00007FFFD2C00000-0x00007FFFD36C1000-memory.dmp