Analysis
- max time kernel
141s - max time network
153s - platform
windows10-2004_x64 - resource
win10v2004-20230703-en - resource tags
- submitted
08/07/2023, 16:51
General
- Target XWorm_DNS.exe
- Size 32KB
- Sample230708-vcs6dsfg92
- SHA256 89c13d0d555824acb2e24f61d92fc6fb3dce46d6af5d1df86e683eb9c24eb3f0
Score
10/10
Malware Config
Extracted
Family
-
xworm
C2
-
caloi1920.ddns.net:4444
Mutex
-
HzYMmjPQMTRUayN2
Attributes
-
install_file
USB.exe
aes.plain
Signatures
- 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.
- Drops startup file 2 IoCs
- Executes dropped EXE 2 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 3 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\XWorm_DNS.exe"C:\Users\Admin\AppData\Local\Temp\XWorm_DNS.exe"1⤵
- Checks computer location settings
- 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 "XWorm_DNS" /tr "C:\Users\Admin\XWorm_DNS.exe"2⤵
- Creates scheduled task(s)
-
-
C:\Users\Admin\XWorm_DNS.exeC:\Users\Admin\XWorm_DNS.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
-
C:\Users\Admin\XWorm_DNS.exeC:\Users\Admin\XWorm_DNS.exe1⤵
- Executes dropped EXE
- Suspicious use of AdjustPrivilegeToken
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
XWorm_DNS.exe.log
XWorm_DNS.exe
XWorm_DNS.exe
XWorm_DNS.exe
XWorm_DNS.exe
memory/4572-133-0x0000000000ED0000-0x0000000000EDE000-memory.dmp
memory/4572-142-0x000000001BD30000-0x000000001BD40000-memory.dmp
memory/4572-143-0x000000001BD30000-0x000000001BD40000-memory.dmp