agenttesla | 2af29a5f99c8ab0654dbece76b2e046f66703a4ae8b4ffa9b4071f9aa74523d7

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"	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\Samples - 10-09-2024\499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe = "0"	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.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	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.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
1584	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	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.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	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe

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	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\Samples - 10-09-2024\499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe = "0"	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe

Looks up external IP address via web service 1 IoCs

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

flow	ioc
10	ip-api.com

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	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 3400 set thread context of 2336	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	83

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	jsc.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
1584	powershell.exe
1584	powershell.exe
2336	jsc.exe
2336	jsc.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	1584	powershell.exe
Token: SeDebugPrivilege	2336	jsc.exe

Suspicious use of WriteProcessMemory 10 IoCs

description	pid	Process	procid_target
PID 3400 wrote to memory of 1584	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	81
PID 3400 wrote to memory of 1584	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	81
PID 3400 wrote to memory of 2336	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	83
PID 3400 wrote to memory of 2336	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	83
PID 3400 wrote to memory of 2336	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	83
PID 3400 wrote to memory of 2336	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	83
PID 3400 wrote to memory of 2336	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	83
PID 3400 wrote to memory of 2336	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	83
PID 3400 wrote to memory of 2336	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	83
PID 3400 wrote to memory of 2336	3400	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe	83

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"	499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe

C:\Users\Admin\AppData\Local\Temp\Samples - 10-09-2024\499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe
"C:\Users\Admin\AppData\Local\Temp\Samples - 10-09-2024\499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.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
- 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:3400
- 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\Samples - 10-09-2024\499df614b640e6e6531f32ceb3271d7d661f5256d49f57e9d360a4791d37943f.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1584
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\jsc.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2336

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

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion