nanocore | 8ec4075cc5bce80c2feadf961db8ccc634518273cf55399bd4669c4bd5c96231

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Oracle\VirtualBox Guest Additions	679ba017a36c5a048bdcba490f2f1c37.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	679ba017a36c5a048bdcba490f2f1c37.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	679ba017a36c5a048bdcba490f2f1c37.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	679ba017a36c5a048bdcba490f2f1c37.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-1-5-21-1497073144-2389943819-3385106915-1000\Control Panel\International\Geo\Nation	679ba017a36c5a048bdcba490f2f1c37.exe

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	679ba017a36c5a048bdcba490f2f1c37.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	679ba017a36c5a048bdcba490f2f1c37.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	679ba017a36c5a048bdcba490f2f1c37.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 1812 set thread context of 2468	1812	679ba017a36c5a048bdcba490f2f1c37.exe	104

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
4104	schtasks.exe

Suspicious behavior: EnumeratesProcesses 10 IoCs

pid	Process
5076	powershell.exe
1768	powershell.exe
5076	powershell.exe
1812	679ba017a36c5a048bdcba490f2f1c37.exe
2468	679ba017a36c5a048bdcba490f2f1c37.exe
2468	679ba017a36c5a048bdcba490f2f1c37.exe
2468	679ba017a36c5a048bdcba490f2f1c37.exe
5528	powershell.exe
1768	powershell.exe
5528	powershell.exe

Suspicious behavior: GetForegroundWindowSpam 1 IoCs

pid	Process
2468	679ba017a36c5a048bdcba490f2f1c37.exe

Suspicious use of AdjustPrivilegeToken 5 IoCs

description	pid	Process
Token: SeDebugPrivilege	5076	powershell.exe
Token: SeDebugPrivilege	1768	powershell.exe
Token: SeDebugPrivilege	1812	679ba017a36c5a048bdcba490f2f1c37.exe
Token: SeDebugPrivilege	2468	679ba017a36c5a048bdcba490f2f1c37.exe
Token: SeDebugPrivilege	5528	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

description	pid	Process	procid_target
PID 1812 wrote to memory of 5076	1812	679ba017a36c5a048bdcba490f2f1c37.exe	97
PID 1812 wrote to memory of 5076	1812	679ba017a36c5a048bdcba490f2f1c37.exe	97
PID 1812 wrote to memory of 5076	1812	679ba017a36c5a048bdcba490f2f1c37.exe	97
PID 1812 wrote to memory of 1768	1812	679ba017a36c5a048bdcba490f2f1c37.exe	99
PID 1812 wrote to memory of 1768	1812	679ba017a36c5a048bdcba490f2f1c37.exe	99
PID 1812 wrote to memory of 1768	1812	679ba017a36c5a048bdcba490f2f1c37.exe	99
PID 1812 wrote to memory of 4104	1812	679ba017a36c5a048bdcba490f2f1c37.exe	102
PID 1812 wrote to memory of 4104	1812	679ba017a36c5a048bdcba490f2f1c37.exe	102
PID 1812 wrote to memory of 4104	1812	679ba017a36c5a048bdcba490f2f1c37.exe	102
PID 1812 wrote to memory of 5528	1812	679ba017a36c5a048bdcba490f2f1c37.exe	105
PID 1812 wrote to memory of 5528	1812	679ba017a36c5a048bdcba490f2f1c37.exe	105
PID 1812 wrote to memory of 5528	1812	679ba017a36c5a048bdcba490f2f1c37.exe	105
PID 1812 wrote to memory of 2468	1812	679ba017a36c5a048bdcba490f2f1c37.exe	104
PID 1812 wrote to memory of 2468	1812	679ba017a36c5a048bdcba490f2f1c37.exe	104
PID 1812 wrote to memory of 2468	1812	679ba017a36c5a048bdcba490f2f1c37.exe	104
PID 1812 wrote to memory of 2468	1812	679ba017a36c5a048bdcba490f2f1c37.exe	104
PID 1812 wrote to memory of 2468	1812	679ba017a36c5a048bdcba490f2f1c37.exe	104
PID 1812 wrote to memory of 2468	1812	679ba017a36c5a048bdcba490f2f1c37.exe	104
PID 1812 wrote to memory of 2468	1812	679ba017a36c5a048bdcba490f2f1c37.exe	104
PID 1812 wrote to memory of 2468	1812	679ba017a36c5a048bdcba490f2f1c37.exe	104

C:\Users\Admin\AppData\Local\Temp\679ba017a36c5a048bdcba490f2f1c37.exe
"C:\Users\Admin\AppData\Local\Temp\679ba017a36c5a048bdcba490f2f1c37.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 behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1812
- 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\679ba017a36c5a048bdcba490f2f1c37.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5076
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\KpYgEy.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:1768
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\KpYgEy" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDD40.tmp"
  2⤵
  - Creates scheduled task(s)
  PID:4104
- C:\Users\Admin\AppData\Local\Temp\679ba017a36c5a048bdcba490f2f1c37.exe
  "C:\Users\Admin\AppData\Local\Temp\679ba017a36c5a048bdcba490f2f1c37.exe"
  2⤵
  - Checks whether UAC is enabled
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious behavior: GetForegroundWindowSpam
  - Suspicious use of AdjustPrivilegeToken
  PID:2468
- C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
  "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\KpYgEy.exe"
  2⤵
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  PID:5528

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

Persistence

Scheduled Task/Job

Privilege Escalation

Scheduled Task/Job

Defense Evasion

Virtualization/Sandbox Evasion

Credential Access

Discovery

Peripheral Device Discovery

T1120

Query Registry

System Information Discovery

Virtualization/Sandbox Evasion