darkcloud | 8838c8ec2ad1e7f3d9b4efcd3c0c2134507988c60915b2a2a6bf10eac2fb3cde

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	Purchase List Xls.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	Purchase List Xls.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	Purchase List Xls.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Purchase List Xls.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-1-5-21-1574508946-349927670-1185736483-1000\Control Panel\International\Geo\Nation	Purchase List Xls.exe

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	Purchase List Xls.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	Purchase List Xls.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1740 set thread context of 1376	1740	Purchase List Xls.exe	99

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

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/Job

pid	Process
1284	schtasks.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
1376	Purchase List Xls.exe

Suspicious use of SetWindowsHookEx 1 IoCs

pid	Process
1376	Purchase List Xls.exe

Suspicious use of WriteProcessMemory 11 IoCs

description	pid	Process	procid_target
PID 1740 wrote to memory of 1284	1740	Purchase List Xls.exe	97
PID 1740 wrote to memory of 1284	1740	Purchase List Xls.exe	97
PID 1740 wrote to memory of 1284	1740	Purchase List Xls.exe	97
PID 1740 wrote to memory of 1376	1740	Purchase List Xls.exe	99
PID 1740 wrote to memory of 1376	1740	Purchase List Xls.exe	99
PID 1740 wrote to memory of 1376	1740	Purchase List Xls.exe	99
PID 1740 wrote to memory of 1376	1740	Purchase List Xls.exe	99
PID 1740 wrote to memory of 1376	1740	Purchase List Xls.exe	99
PID 1740 wrote to memory of 1376	1740	Purchase List Xls.exe	99
PID 1740 wrote to memory of 1376	1740	Purchase List Xls.exe	99
PID 1740 wrote to memory of 1376	1740	Purchase List Xls.exe	99

C:\Users\Admin\AppData\Local\Temp\Purchase List Xls.exe
"C:\Users\Admin\AppData\Local\Temp\Purchase List Xls.exe"
1⤵
- Looks for VirtualBox Guest Additions in registry
- Looks for VMWare Tools registry key
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:1740
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\sCCATp" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB159.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:1284
- C:\Users\Admin\AppData\Local\Temp\Purchase List Xls.exe
  "{path}"
  2⤵
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of SetWindowsHookEx
  PID:1376

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1

Persistence

Scheduled Task/Job

1

Privilege Escalation

Scheduled Task/Job

1

Defense Evasion

Virtualization/Sandbox Evasion

2

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

4

Virtualization/Sandbox Evasion

2