agenttesla | cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe = "0"	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.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

pid	Process
2284	powershell.exe

Looks for VMWare Tools registry key 2 TTPs 1 IoCs

evasion

Query Registry

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe

Checks BIOS information in registry 2 TTPs 2 IoCs

BIOS information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Control Panel\International\Geo\Nation	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe

Unsecured Credentials: Credentials In Files 1 TTPs
Steal credentials from unsecured files.
credential_access stealer

Credentials In Files
T1552.001

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe = "0"	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	installutil.exe
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	installutil.exe
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	installutil.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe

Looks up external IP address via web service 2 IoCs

Uses a legitimate IP lookup service to find the infected system's external IP.

flow	ioc
15	api.ipify.org
16	api.ipify.org

Maps connected drives based on registry 3 TTPs 2 IoCs

Disk information is often read in order to detect sandboxing environments.

Query Registry

Peripheral Device Discovery

T1120

System Information Discovery

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3444 set thread context of 2468	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	87

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

System Information Discovery
T1082

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	installutil.exe

Suspicious behavior: EnumeratesProcesses 5 IoCs

pid	Process
2284	powershell.exe
2284	powershell.exe
2468	installutil.exe
2468	installutil.exe
2468	installutil.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2284	powershell.exe
Token: SeDebugPrivilege	2468	installutil.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2468	installutil.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3444 wrote to memory of 2284	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	86
PID 3444 wrote to memory of 2284	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	86
PID 3444 wrote to memory of 2468	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	87
PID 3444 wrote to memory of 2468	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	87
PID 3444 wrote to memory of 2468	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	87
PID 3444 wrote to memory of 2468	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	87
PID 3444 wrote to memory of 2468	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	87
PID 3444 wrote to memory of 2468	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	87
PID 3444 wrote to memory of 2468	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	87
PID 3444 wrote to memory of 2468	3444	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe	87

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	installutil.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-493223053-2004649691-1575712786-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	installutil.exe

C:\Users\Admin\AppData\Local\Temp\cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe
"C:\Users\Admin\AppData\Local\Temp\cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe"
1⤵
- UAC bypass
- Windows security bypass
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks computer location settings
- Windows security modification
- Checks whether UAC is enabled
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:3444
- 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\cf192820368219f862180ca80c22a668d69ad244d43cbcf443a5f6633ff75528.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2284
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  - outlook_office_path
  - outlook_win_path
  PID:2468

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

T1562

Disable or Modify Tools

Modify Registry

Virtualization/Sandbox Evasion

Credential Access

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion