agenttesla | 8e24500c381c9abb77a1892a68e62f367852ff945e1bcbac379441e4fea772b1

Bypass User Account Control

T1548.002

Disable or Modify Tools

Modify Registry

Processes:

Ach_Payment_Advice01.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Ach_Payment_Advice01.exe

Windows security bypass 2 TTPs 2 IoCs

Disable or Modify Tools

Modify Registry

Processes:

Ach_Payment_Advice01.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	Ach_Payment_Advice01.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\Ach_Payment_Advice01.exe = "0"	Ach_Payment_Advice01.exe

Looks for VirtualBox Guest Additions in registry 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

Ach_Payment_Advice01.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions Ach_Payment_Advice01.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

4004 powershell.exe
Looks for VMWare Tools registry key 2 TTPs 1 IoCs
evasion

Query Registry
T1012

Virtualization/Sandbox Evasion
T1497

Processes:

Ach_Payment_Advice01.exe

description ioc process

Key opened \REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools Ach_Payment_Advice01.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	Ach_Payment_Advice01.exe

pid	process
4004	powershell.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SOFTWARE\VMware, Inc.\VMware Tools	Ach_Payment_Advice01.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

Processes:

Ach_Payment_Advice01.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Ach_Payment_Advice01.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Ach_Payment_Advice01.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

Processes:

Ach_Payment_Advice01.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3558294865-3673844354-2255444939-1000\Control Panel\International\Geo\Nation	Ach_Payment_Advice01.exe

Windows security modification 2 TTPs 3 IoCs

Disable or Modify Tools

Modify Registry

Processes:

Ach_Payment_Advice01.exe

description	ioc	process
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths	Ach_Payment_Advice01.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions	Ach_Payment_Advice01.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows Defender\Exclusions\Paths\C:\Users\Admin\AppData\Local\Temp\Ach_Payment_Advice01.exe = "0"	Ach_Payment_Advice01.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

System Information Discovery

Processes:

Ach_Payment_Advice01.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Ach_Payment_Advice01.exe
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	Ach_Payment_Advice01.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.

Processes:

flow ioc

26 api.ipify.org
27 api.ipify.org

flow	ioc
26	api.ipify.org
27	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

Processes:

Ach_Payment_Advice01.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	Ach_Payment_Advice01.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	Ach_Payment_Advice01.exe

Suspicious use of SetThreadContext 1 IoCs

Processes:

Ach_Payment_Advice01.exe

description pid process target process

PID 4040 set thread context of 4116 4040 Ach_Payment_Advice01.exe regsvcs.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082
Suspicious behavior: EnumeratesProcesses 6 IoCs

Processes:

powershell.exeregsvcs.exe

pid process

4004 powershell.exe
4004 powershell.exe
4004 powershell.exe
4116 regsvcs.exe
4116 regsvcs.exe
4116 regsvcs.exe
Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes:

powershell.exeregsvcs.exe

description pid process

Token: SeDebugPrivilege 4004 powershell.exe
Token: SeDebugPrivilege 4116 regsvcs.exe
Suspicious use of SetWindowsHookEx 1 IoCs

Processes:

regsvcs.exe

pid process

4116 regsvcs.exe

description	pid	process	target process
PID 4040 set thread context of 4116	4040	Ach_Payment_Advice01.exe	regsvcs.exe

pid	process
4004	powershell.exe
4004	powershell.exe
4004	powershell.exe
4116	regsvcs.exe
4116	regsvcs.exe
4116	regsvcs.exe

description	pid	process
Token: SeDebugPrivilege	4004	powershell.exe
Token: SeDebugPrivilege	4116	regsvcs.exe

pid	process
4116	regsvcs.exe

Suspicious use of WriteProcessMemory 13 IoCs

Processes:

Ach_Payment_Advice01.exe

description	pid	process	target process
PID 4040 wrote to memory of 4004	4040	Ach_Payment_Advice01.exe	powershell.exe
PID 4040 wrote to memory of 4004	4040	Ach_Payment_Advice01.exe	powershell.exe
PID 4040 wrote to memory of 4116	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 4116	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 4116	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 4116	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 4116	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 4116	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 4116	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 4116	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 3600	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 3600	4040	Ach_Payment_Advice01.exe	regsvcs.exe
PID 4040 wrote to memory of 3600	4040	Ach_Payment_Advice01.exe	regsvcs.exe

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

Processes:

Ach_Payment_Advice01.exe

description	ioc	process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	Ach_Payment_Advice01.exe

C:\Users\Admin\AppData\Local\Temp\Ach_Payment_Advice01.exe
"C:\Users\Admin\AppData\Local\Temp\Ach_Payment_Advice01.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:4040

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\Ach_Payment_Advice01.exe" -Force
2⤵
- Command and Scripting Interpreter: PowerShell
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:4004

C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
2⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:4116

C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
"C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
2⤵
PID:3600

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

3

Modify Registry

4

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

5

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

5

Peripheral Device Discovery