xworm | b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe = "0"	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

Xworm
Xworm is a remote access trojan written in C#.
trojan rat xworm
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.
execution

PowerShell
T1059.001

Processes:

powershell.exe

pid process

3768 powershell.exe

pid	process
3768	powershell.exe

Checks computer location settings 2 TTPs 1 IoCs

Looks up country code configured in the registry, likely geofence.

Query Registry

T1012

System Information Discovery

T1082

Processes:

b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1181767204-2009306918-3718769404-1000\Control Panel\International\Geo\Nation	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe = "0"	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

Processes:

b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

description	pid	process	target process
PID 1432 set thread context of 4252	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe

Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 3 IoCs

Processes:

powershell.exe

pid process

3768 powershell.exe
3768 powershell.exe
3768 powershell.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeCasPol.exe

description pid process

Token: SeDebugPrivilege 3768 powershell.exe
Token: SeDebugPrivilege 4252 CasPol.exe

pid	process
3768	powershell.exe
3768	powershell.exe
3768	powershell.exe

description	pid	process
Token: SeDebugPrivilege	3768	powershell.exe
Token: SeDebugPrivilege	4252	CasPol.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

description	pid	process	target process
PID 1432 wrote to memory of 3768	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	powershell.exe
PID 1432 wrote to memory of 3768	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	powershell.exe
PID 1432 wrote to memory of 4252	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 4252	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 4252	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 4252	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 4252	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 4252	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 4252	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 4252	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 2392	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 2392	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe
PID 1432 wrote to memory of 2392	1432	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe	CasPol.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

Processes:

b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe

C:\Users\Admin\AppData\Local\Temp\b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe
"C:\Users\Admin\AppData\Local\Temp\b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe"
1⤵
- UAC bypass
- Windows security bypass
- Checks computer location settings
- Windows security modification
- Checks whether UAC is enabled
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:1432

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\b542502918e537abff66105f9432f29e6d8ba7d4169b7d2894dd9ed3261e0141.exe" -Force
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:3768

C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
2⤵
- Suspicious use of AdjustPrivilegeToken
PID:4252

C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
2⤵
PID:2392

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=3980,i,13281073920029625837,8253721632651544158,262144 --variations-seed-version --mojo-platform-channel-handle=3628 /prefetch:8
1⤵
PID:3384

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Defense Evasion

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Impair Defenses

3

T1562

Disable or Modify Tools

Modify Registry

Credential Access

Discovery

Query Registry