agenttesla | 1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.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
2556	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	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.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	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe

Checks whether UAC is enabled 1 TTPs 2 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.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
4	api.ipify.org
5	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	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2776 set thread context of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32

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

System Information Discovery
T1082

Suspicious behavior: EnumeratesProcesses 3 IoCs

pid	Process
2556	powershell.exe
2072	CasPol.exe
2072	CasPol.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	2556	powershell.exe
Token: SeDebugPrivilege	2072	CasPol.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2072	CasPol.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 2776 wrote to memory of 2556	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	29
PID 2776 wrote to memory of 2556	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	29
PID 2776 wrote to memory of 2556	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	29
PID 2776 wrote to memory of 2692	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	31
PID 2776 wrote to memory of 2692	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	31
PID 2776 wrote to memory of 2692	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	31
PID 2776 wrote to memory of 2692	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	31
PID 2776 wrote to memory of 2692	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	31
PID 2776 wrote to memory of 2692	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	31
PID 2776 wrote to memory of 2692	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	31
PID 2776 wrote to memory of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32
PID 2776 wrote to memory of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32
PID 2776 wrote to memory of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32
PID 2776 wrote to memory of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32
PID 2776 wrote to memory of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32
PID 2776 wrote to memory of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32
PID 2776 wrote to memory of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32
PID 2776 wrote to memory of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32
PID 2776 wrote to memory of 2072	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	32
PID 2776 wrote to memory of 2600	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	33
PID 2776 wrote to memory of 2600	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	33
PID 2776 wrote to memory of 2600	2776	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe	33

System policy modification 1 TTPs 1 IoCs

evasion

Modify Registry

T1112

description	ioc	Process
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe

C:\Users\Admin\AppData\Local\Temp\1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe
"C:\Users\Admin\AppData\Local\Temp\1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe"
1⤵
- UAC bypass
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks whether UAC is enabled
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
- System policy modification
PID:2776
- 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\1615274acd75a7b13afe34886165cf97e6f15485b2186c75509fb47d7baa7468.exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:2556
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
  2⤵
  PID:2692
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2072
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 2776 -s 1012
  2⤵
  PID:2600

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

2

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

4

Virtualization/Sandbox Evasion

2