agenttesla | b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe = "0"	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

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

2752 powershell.exe

pid	process
2752	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:

b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2539840389-1261165778-1087677076-1000\Control Panel\International\Geo\Nation	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

Processes:

b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe = "0"	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

Processes:

b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

description	pid	process	target process
PID 2996 set thread context of 4916	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe

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

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exemsbuild.exe

pid process

2752 powershell.exe
2752 powershell.exe
4916 msbuild.exe
4916 msbuild.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exemsbuild.exe

description pid process

Token: SeDebugPrivilege 2752 powershell.exe
Token: SeDebugPrivilege 4916 msbuild.exe

pid	process
2752	powershell.exe
2752	powershell.exe
4916	msbuild.exe
4916	msbuild.exe

description	pid	process
Token: SeDebugPrivilege	2752	powershell.exe
Token: SeDebugPrivilege	4916	msbuild.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

description	pid	process	target process
PID 2996 wrote to memory of 2752	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	powershell.exe
PID 2996 wrote to memory of 2752	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	powershell.exe
PID 2996 wrote to memory of 4916	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4916	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4916	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4916	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4916	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4916	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4916	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4916	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4608	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4608	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe
PID 2996 wrote to memory of 4608	2996	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe	msbuild.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

Processes:

b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe

C:\Users\Admin\AppData\Local\Temp\b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe
"C:\Users\Admin\AppData\Local\Temp\b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.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:2996

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\b4c52779d09ea4edabef9ef75c2756cdd9a1fc0c10564ea7cd153ca223d0a9d8.exe" -Force
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:2752

C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4916

C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\msbuild.exe"
2⤵
PID:4608

Network

MITRE ATT&CK Matrix ATT&CK v13

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