Analysis
- max time kernel
293s - max time network
298s - platform
windows10-2004_x64 - resource
win10v2004-20240419-en - resource tags
- submitted
03/05/2024, 12:49
General
- Target op.exe
- Size 68KB
- Sample240503-p2bprafg3z
- SHA256 a615aece52e909040876d9f88984d4a60499f2604dc181acc69aa241dd1e1ed2
Malware Config
Extracted
-
xworm
-
Install_directory
%AppData%
-
install_file
dllhost.exe
-
telegram
https://api.telegram.org/bot6840593734:AAGeMJswJHfSYYy4WpS8cypmpzA8wfWUYMg/sendMessage?chat_id=1330099235
Signatures
- Detect Xworm Payload 2 IoCs
- Xworm
Xworm is a remote access trojan written in C#.
- Checks computer location settings 2 TTPs 1 IoCs
Looks up country code configured in the registry, likely geofence.
- Executes dropped EXE 5 IoCs
- Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).
- Creates scheduled task(s) 1 TTPs 1 IoCs
Schtasks is often used by malware for persistence or to perform post-infection execution.
- Suspicious behavior: EnumeratesProcesses 1 IoCs
- Suspicious use of AdjustPrivilegeToken 6 IoCs
- Suspicious use of SetWindowsHookEx 1 IoCs
- Suspicious use of WriteProcessMemory 2 IoCs
- 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
-
C:\Users\Admin\AppData\Local\Temp\op.exe"C:\Users\Admin\AppData\Local\Temp\op.exe"1⤵
- Checks computer location settings
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "dllhost" /tr "C:\Users\Admin\AppData\Roaming\dllhost.exe"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\dllhost.exeC:\Users\Admin\AppData\Roaming\dllhost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\dllhost.exeC:\Users\Admin\AppData\Roaming\dllhost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\dllhost.exeC:\Users\Admin\AppData\Roaming\dllhost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\dllhost.exeC:\Users\Admin\AppData\Roaming\dllhost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\dllhost.exeC:\Users\Admin\AppData\Roaming\dllhost.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
dllhost.exe.log
dllhost.exe
memory/932-8-0x00007FFC94990000-0x00007FFC95451000-memory.dmp
memory/932-10-0x00007FFC94990000-0x00007FFC95451000-memory.dmp
memory/4572-1-0x00007FFC94993000-0x00007FFC94995000-memory.dmp
memory/4572-0-0x0000000000B00000-0x0000000000B18000-memory.dmp
memory/4572-3-0x00007FFC94990000-0x00007FFC95451000-memory.dmp
memory/4572-4-0x00007FFC94993000-0x00007FFC94995000-memory.dmp
memory/4572-5-0x00007FFC94990000-0x00007FFC95451000-memory.dmp