agenttesla | aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3

Bypass User Account Control

T1548.002

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe = "0"	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.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
3440	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

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-3350944739-639801879-157714471-1000\Control Panel\International\Geo\Nation	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

T1562.001

Modify Registry

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe = "0"	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.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
17	ip-api.com

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2544 set thread context of 2388	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	90

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	regsvcs.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
3440	powershell.exe
3440	powershell.exe
2388	regsvcs.exe
2388	regsvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3440	powershell.exe
Token: SeDebugPrivilege	2388	regsvcs.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2388	regsvcs.exe

Suspicious use of WriteProcessMemory 16 IoCs

description	pid	Process	procid_target
PID 2544 wrote to memory of 3440	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	86
PID 2544 wrote to memory of 3440	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	86
PID 2544 wrote to memory of 3008	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	87
PID 2544 wrote to memory of 3008	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	87
PID 2544 wrote to memory of 3008	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	87
PID 2544 wrote to memory of 2388	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	90
PID 2544 wrote to memory of 2388	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	90
PID 2544 wrote to memory of 2388	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	90
PID 2544 wrote to memory of 2388	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	90
PID 2544 wrote to memory of 2388	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	90
PID 2544 wrote to memory of 2388	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	90
PID 2544 wrote to memory of 2388	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	90
PID 2544 wrote to memory of 2388	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	90
PID 2544 wrote to memory of 3532	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	91
PID 2544 wrote to memory of 3532	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	91
PID 2544 wrote to memory of 3532	2544	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe	91

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"	aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe

C:\Users\Admin\AppData\Local\Temp\aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe
"C:\Users\Admin\AppData\Local\Temp\aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.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:2544
- 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\aa4b277c8b219071a9d1196920c5929ed3c7b368b14e2daf241e1001216c25b3.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3440
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\installutil.exe"
  2⤵
  PID:3008
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2388
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
  2⤵
  PID:3532

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

T1012

System Information Discovery

3

T1082

System Location Discovery

T1614

System Language Discovery