Analysis
- max time kernel
144s - max time network
148s - platform
windows11-21h2_x64 - resource
win11-20240419-en - resource tags
- submitted
04/06/2024, 15:51
General
- Target XClient.exe
- Size 60KB
- Sample240604-tawcascf52
- SHA256 42a2d2e5a819e1b67c4ea11e3bee7aafa22770cb129cdcbefb0ff69afd233bfa
Score
10/10
Malware Config
Extracted
Family
-
xworm
Version
-
3.0
C2
-
ayumi-27013.portmap.host:27013
Attributes
-
Install_directory
%AppData%
-
install_file
USB.exe
Signatures
- Detect Xworm Payload 2 IoCs
- Xworm
Xworm is a remote access trojan written in C#.
- Drops startup file 2 IoCs
- Executes dropped EXE 3 IoCs
- Adds Run key to start application 2 TTPs 1 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 use of AdjustPrivilegeToken 4 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\XClient.exe"C:\Users\Admin\AppData\Local\Temp\XClient.exe"1⤵
- Drops startup file
- Adds Run key to start application
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
-
C:\Windows\System32\schtasks.exe"C:\Windows\System32\schtasks.exe" /create /f /RL HIGHEST /sc minute /mo 1 /tn "XClient" /tr "C:\Users\Admin\AppData\Roaming\XClient.exe"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\AppData\Roaming\XClient.exeC:\Users\Admin\AppData\Roaming\XClient.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\XClient.exeC:\Users\Admin\AppData\Roaming\XClient.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\AppData\Roaming\XClient.exeC:\Users\Admin\AppData\Roaming\XClient.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
XClient.exe.log
XClient.exe
memory/3376-0-0x00007FF8A3873000-0x00007FF8A3875000-memory.dmp
memory/3376-1-0x0000000000280000-0x0000000000296000-memory.dmp
memory/3376-10-0x00007FF8A3870000-0x00007FF8A4332000-memory.dmp
memory/3376-16-0x00007FF8A3870000-0x00007FF8A4332000-memory.dmp
memory/4724-13-0x00007FF8A3870000-0x00007FF8A4332000-memory.dmp
memory/4724-15-0x00007FF8A3870000-0x00007FF8A4332000-memory.dmp