agenttesla | c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6

Virtualization/Sandbox Evasion

T1497

description	ioc	Process
Key opened	\REGISTRY\MACHINE\HARDWARE\ACPI\DSDT\VBOX__	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.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
3920	powershell.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	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\USER\S-1-5-21-4089630652-1596403869-279772308-1000\Control Panel\International\Geo\Nation	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe

Reads WinSCP keys stored on the system 2 TTPs
Tries to access WinSCP stored sessions.
spyware stealer

Data from Local System
T1005

Credentials in Registry
T1552.002
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
T1552.001
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
T1552.001
Reads user/profile data of web browsers 3 TTPs
Infostealers often target stored browser data, which can include saved credentials etc.
spyware stealer

Data from Local System
T1005

Credentials In Files
T1552.001

Credentials from Web Browsers
T1555.003

Themida packer 15 IoCs

Detects Themida, an advanced Windows software protection system.

themida

resource	yara_rule
behavioral2/memory/3892-29-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-37-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-35-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-43-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-44-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-48-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-47-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-49-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-50-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-52-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-45-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-46-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-42-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-41-0x0000000000400000-0x0000000000A20000-memory.dmp	themida
behavioral2/memory/3892-40-0x0000000000400000-0x0000000000A20000-memory.dmp	themida

Checks whether UAC is enabled 1 TTPs 1 IoCs

evasion trojan

System Information Discovery

description	ioc	Process
Key value queried	\REGISTRY\MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\EnableLUA	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.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
19	ip-api.com

Suspicious use of NtSetInformationThreadHideFromDebugger 1 IoCs

pid	Process
3892	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1312 set thread context of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99

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 4 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	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	powershell.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe

Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

persistence execution

Scheduled Task

pid	Process
3464	schtasks.exe

Suspicious behavior: EnumeratesProcesses 17 IoCs

pid	Process
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
3920	powershell.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
3892	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
3892	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
3920	powershell.exe
3892	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
3892	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

description	pid	Process
Token: SeDebugPrivilege	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
Token: SeDebugPrivilege	3920	powershell.exe
Token: SeDebugPrivilege	3892	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
3892	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe

Suspicious use of WriteProcessMemory 30 IoCs

description	pid	Process	procid_target
PID 1312 wrote to memory of 3920	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	91
PID 1312 wrote to memory of 3920	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	91
PID 1312 wrote to memory of 3920	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	91
PID 1312 wrote to memory of 3464	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	93
PID 1312 wrote to memory of 3464	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	93
PID 1312 wrote to memory of 3464	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	93
PID 1312 wrote to memory of 464	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	95
PID 1312 wrote to memory of 464	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	95
PID 1312 wrote to memory of 464	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	95
PID 1312 wrote to memory of 4188	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	96
PID 1312 wrote to memory of 4188	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	96
PID 1312 wrote to memory of 4188	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	96
PID 1312 wrote to memory of 5000	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	97
PID 1312 wrote to memory of 5000	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	97
PID 1312 wrote to memory of 5000	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	97
PID 1312 wrote to memory of 2292	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	98
PID 1312 wrote to memory of 2292	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	98
PID 1312 wrote to memory of 2292	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	98
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99
PID 1312 wrote to memory of 3892	1312	c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe	99

C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
"C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe"
1⤵
- Checks computer location settings
- Suspicious use of SetThreadContext
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1312
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\NuWWtBZeYqtw.exe"
  2⤵
  - Command and Scripting Interpreter: PowerShell
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:3920
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\NuWWtBZeYqtw" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA2C.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:3464
- C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
  "C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe"
  2⤵
  PID:464
- C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
  "C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe"
  2⤵
  PID:4188
- C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
  "C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe"
  2⤵
  PID:5000
- C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
  "C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe"
  2⤵
  PID:2292
- C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe
  "C:\Users\Admin\AppData\Local\Temp\c31ef3e47ebbb92febeeda72abfdbe9b8bb92cca58eda4e607ef2b192d6df1d6.exe"
  2⤵
  - Identifies VirtualBox via ACPI registry values (likely anti-VM)
  - Checks BIOS information in registry
  - Checks whether UAC is enabled
  - Suspicious use of NtSetInformationThreadHideFromDebugger
  - System Location Discovery: System Language Discovery
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of SetWindowsHookEx
  PID:3892

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

T1059

PowerShell

T1059.001

Scheduled Task/Job

T1053

Scheduled Task

Persistence

Scheduled Task/Job

T1053

Scheduled Task

Privilege Escalation

Scheduled Task/Job

T1053

Scheduled Task

Defense Evasion

Virtualization/Sandbox Evasion

T1497

Credential Access

Credentials from Password Stores

T1555

Credentials from Web Browsers

T1555.003

Unsecured Credentials

T1552

Credentials In Files

T1552.001

Credentials in Registry

T1552.002

Discovery

Query Registry

System Information Discovery