agenttesla | f0e95ff0016fa9716b91e8c61ef8d64c29f37e7d7c1adb13d76ecdb7269a299b

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.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\Wow6432Node\VMware, Inc.\VMware Tools	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.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

T1082

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe

Reads data files stored by FTP clients 2 TTPs
Tries to access configuration files associated with programs like FileZilla.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of local email clients 2 TTPs
Email clients store some user data on disk where infostealers will often target it.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081
Reads user/profile data of web browsers 2 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials in Files
T1081

Accesses Microsoft Outlook profiles 1 TTPs 3 IoCs

collection

Email Collection

T1114

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\15.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.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
4	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

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1536 set thread context of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33

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

System Information Discovery
T1082

Creates scheduled task(s) 1 TTPs 1 IoCs

Schtasks is often used by malware for persistence or to perform post-infection execution.

persistence

Scheduled Task

pid	Process
1204	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
580	powershell.exe
800	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	452	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe
Token: SeDebugPrivilege	800	powershell.exe
Token: SeDebugPrivilege	580	powershell.exe

Suspicious use of WriteProcessMemory 21 IoCs

description	pid	Process	procid_target
PID 1536 wrote to memory of 800	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	26
PID 1536 wrote to memory of 800	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	26
PID 1536 wrote to memory of 800	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	26
PID 1536 wrote to memory of 800	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	26
PID 1536 wrote to memory of 580	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	29
PID 1536 wrote to memory of 580	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	29
PID 1536 wrote to memory of 580	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	29
PID 1536 wrote to memory of 580	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	29
PID 1536 wrote to memory of 1204	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	31
PID 1536 wrote to memory of 1204	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	31
PID 1536 wrote to memory of 1204	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	31
PID 1536 wrote to memory of 1204	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	31
PID 1536 wrote to memory of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33
PID 1536 wrote to memory of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33
PID 1536 wrote to memory of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33
PID 1536 wrote to memory of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33
PID 1536 wrote to memory of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33
PID 1536 wrote to memory of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33
PID 1536 wrote to memory of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33
PID 1536 wrote to memory of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33
PID 1536 wrote to memory of 452	1536	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe	33

outlook_office_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Office\16.0\Outlook\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe

outlook_win_path 1 IoCs

description	ioc	Process
Key opened	\REGISTRY\USER\S-1-5-21-999675638-2867687379-27515722-1000\Software\Microsoft\Windows NT\CurrentVersion\Windows Messaging Subsystem\Profiles\Outlook\9375CFF0413111d3B88A00104B2A6676	a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe

C:\Users\Admin\AppData\Local\Temp\a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe
"C:\Users\Admin\AppData\Local\Temp\a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1536
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:800
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\VlLGEnbeCB.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:580
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\VlLGEnbeCB" /XML "C:\Users\Admin\AppData\Local\Temp\tmpE34E.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1204
- C:\Users\Admin\AppData\Local\Temp\a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe
  "C:\Users\Admin\AppData\Local\Temp\a99e1ee9d73c40a52f7de89f3ef7197b251c0a2c.exe"
  2⤵
  - Accesses Microsoft Outlook profiles
  - Suspicious use of AdjustPrivilegeToken
  - outlook_office_path
  - outlook_win_path
  PID:452

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

1

Persistence

Scheduled Task

1

Privilege Escalation

Scheduled Task

1

Defense Evasion

Virtualization/Sandbox Evasion

2

Credential Access

Credentials in Files

3

T1081

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

Virtualization/Sandbox Evasion

2