agenttesla | 272d2472eb7694684dc9930463283cf958fe2f90a332119f2a4450dd9ad51b83

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Oracle\VirtualBox Guest Additions	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..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
3020	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	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..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	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe

Adds Run key to start application 2 TTPs 1 IoCs

persistence

Registry Run Keys / Startup Folder

T1547.001

Modify Registry

T1112

description	ioc	Process
Set value (str)	\REGISTRY\USER\S-1-5-21-481678230-3773327859-3495911762-1000\Software\Microsoft\Windows\CurrentVersion\Run\plQRnonsft = "C:\\Users\\Admin\\AppData\\Roaming\\plQRnonsft\\plQRnonsft.exe"	regsvcs.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	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA = "0"	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..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	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1200 set thread context of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..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
3020	powershell.exe
2496	regsvcs.exe
2496	regsvcs.exe

Suspicious use of AdjustPrivilegeToken 2 IoCs

description	pid	Process
Token: SeDebugPrivilege	3020	powershell.exe
Token: SeDebugPrivilege	2496	regsvcs.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
2496	regsvcs.exe

Suspicious use of WriteProcessMemory 22 IoCs

description	pid	Process	procid_target
PID 1200 wrote to memory of 3020	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	29
PID 1200 wrote to memory of 3020	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	29
PID 1200 wrote to memory of 3020	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	29
PID 1200 wrote to memory of 2704	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	31
PID 1200 wrote to memory of 2704	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	31
PID 1200 wrote to memory of 2704	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	31
PID 1200 wrote to memory of 2704	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	31
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2496	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	32
PID 1200 wrote to memory of 2516	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	33
PID 1200 wrote to memory of 2516	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe	33
PID 1200 wrote to memory of 2516	1200	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..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"	P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe

C:\Users\Admin\AppData\Local\Temp\P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe
"C:\Users\Admin\AppData\Local\Temp\P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..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:1200
- 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\P.O.20406279090001209.xlxs‮s؜x؜l؜x؜..exe" -Force
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3020
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\CasPol.exe"
  2⤵
  PID:2704
- C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe
  "C:\Windows\Microsoft.NET\Framework\v4.0.30319\regsvcs.exe"
  2⤵
  - Adds Run key to start application
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:2496
- C:\Windows\system32\WerFault.exe
  C:\Windows\system32\WerFault.exe -u -p 1200 -s 928
  2⤵
  PID:2516

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Privilege Escalation

Abuse Elevation Control Mechanism

T1548

Bypass User Account Control

T1548.002

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

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