Analysis
- max time kernel
130s - max time network
132s - platform
windows7_x64 - resource
win7-20241023-en - resource tags
- submitted
02/01/2025, 21:33
General
- Target bjyk.exe
- Size 378KB
- Sample250102-1ejbvswpcv
- SHA256 ca89debe5dff34c2e2f56875d7dcde5e47565329d3aeb2f2f4a6a3e2248fe664
Malware Config
Signatures
- Gh0st RAT payload 9 IoCs
- Gh0strat
Gh0st RAT is a remote access tool (RAT) with its source code public and it has been used by multiple Chinese groups.
- Gh0strat family
- ACProtect 1.3x - 1.4x DLL software 1 IoCs
Detects file using ACProtect software.
- Deletes itself 1 IoCs
- Executes dropped EXE 1 IoCs
- Loads dropped DLL 4 IoCs
- Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
- Drops file in System32 directory 2 IoCs
- System Location Discovery: System Language Discovery 1 TTPs 3 IoCs
Attempt gather information about the system language of a victim in order to infer the geographical location of that host.
- Checks processor information in registry 2 TTPs 2 IoCs
Processor information is often read in order to detect sandboxing environments.
- Modifies data under HKEY_USERS 6 IoCs
- Suspicious behavior: EnumeratesProcesses 4 IoCs
- Suspicious use of AdjustPrivilegeToken 18 IoCs
- Suspicious use of SetWindowsHookEx 2 IoCs
- Suspicious use of WriteProcessMemory 7 IoCs
Processes
-
C:\Users\Admin\AppData\Local\Temp\bjyk.exe"C:\Users\Admin\AppData\Local\Temp\bjyk.exe"1⤵
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
\??\c:\users\admin\appdata\local\cpojoigwyp"C:\Users\Admin\AppData\Local\Temp\bjyk.exe" a -sc:\users\admin\appdata\local\temp\bjyk.exe2⤵
- Deletes itself
- Executes dropped EXE
- Loads dropped DLL
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
-
-
C:\Windows\SysWOW64\svchost.exeC:\Windows\SysWOW64\svchost.exe -k netsvcs1⤵
- Loads dropped DLL
- Writes to the Master Boot Record (MBR)
- Drops file in System32 directory
- System Location Discovery: System Language Discovery
- Checks processor information in registry
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
etpgb.cc3
srlB3B5.tmp
cpojoigwyp
memory/772-12-0x0000000000280000-0x00000000002B3000-memory.dmp
memory/772-19-0x0000000000890000-0x0000000000904000-memory.dmp
memory/772-7-0x0000000000890000-0x0000000000904000-memory.dmp
memory/772-8-0x0000000000401000-0x0000000000402000-memory.dmp
memory/772-3-0x0000000000280000-0x00000000002B3000-memory.dmp
memory/772-0-0x0000000000400000-0x0000000000432800-memory.dmp
memory/772-4-0x0000000000280000-0x00000000002B3000-memory.dmp
memory/772-1-0x0000000000280000-0x00000000002B3000-memory.dmp
memory/772-18-0x0000000000400000-0x0000000000432800-memory.dmp
memory/2184-23-0x0000000001E00000-0x0000000001E74000-memory.dmp
memory/2184-25-0x0000000000400000-0x0000000000432800-memory.dmp
memory/2184-16-0x0000000000400000-0x0000000000432800-memory.dmp
memory/2184-32-0x0000000000400000-0x0000000000432800-memory.dmp
memory/2184-31-0x0000000001E00000-0x0000000001E74000-memory.dmp
memory/2764-33-0x00000000001F0000-0x00000000001F1000-memory.dmp