formbook | 1d001e81d92115d22ebefebc16a74c733328f1b54fc4b4ac7ee4657514ec90d3

Virtualization/Sandbox Evasion

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Oracle\VirtualBox Guest Additions	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.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	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.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\SystemBiosVersion	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.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

T1082

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\Disk\Enum\0	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe

Suspicious use of SetThreadContext 1 IoCs

description	pid	Process	procid_target
PID 2700 set thread context of 1868	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	35

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

System Information Discovery
T1082

Program crash 1 IoCs

pid	pid_target	Process	procid_target
1384	1868	WerFault.exe	35

System Location Discovery: System Language Discovery 1 TTPs 3 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	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	schtasks.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.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
2648	schtasks.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe
2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe

Suspicious use of WriteProcessMemory 19 IoCs

description	pid	Process	procid_target
PID 2700 wrote to memory of 2648	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	32
PID 2700 wrote to memory of 2648	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	32
PID 2700 wrote to memory of 2648	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	32
PID 2700 wrote to memory of 2648	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	32
PID 2700 wrote to memory of 2404	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	34
PID 2700 wrote to memory of 2404	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	34
PID 2700 wrote to memory of 2404	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	34
PID 2700 wrote to memory of 2404	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	34
PID 2700 wrote to memory of 1868	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	35
PID 2700 wrote to memory of 1868	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	35
PID 2700 wrote to memory of 1868	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	35
PID 2700 wrote to memory of 1868	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	35
PID 2700 wrote to memory of 1868	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	35
PID 2700 wrote to memory of 1868	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	35
PID 2700 wrote to memory of 1868	2700	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	35
PID 1868 wrote to memory of 1384	1868	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	36
PID 1868 wrote to memory of 1384	1868	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	36
PID 1868 wrote to memory of 1384	1868	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	36
PID 1868 wrote to memory of 1384	1868	0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe	36

C:\Users\Admin\AppData\Local\Temp\0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe
"C:\Users\Admin\AppData\Local\Temp\0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.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
- System Location Discovery: System Language Discovery
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2700
- C:\Windows\SysWOW64\schtasks.exe
  "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\edBmCdRmFidR" /XML "C:\Users\Admin\AppData\Local\Temp\tmp58CA.tmp"
  2⤵
  - System Location Discovery: System Language Discovery
  - Scheduled Task/Job: Scheduled Task
  PID:2648
- C:\Users\Admin\AppData\Local\Temp\0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe
  "{path}"
  2⤵
  PID:2404
- C:\Users\Admin\AppData\Local\Temp\0535aac19775700bc13586181c92a0f4ad31d4b9f2a8a9488e025a55aa09cf1e.exe
  "{path}"
  2⤵
  - System Location Discovery: System Language Discovery
  - Suspicious use of WriteProcessMemory
  PID:1868
- - C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -u -p 1868 -s 36
    3⤵
    - Program crash
    PID:1384

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

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

2

Credential Access

Discovery

Peripheral Device Discovery

Query Registry

System Information Discovery

3

T1082

System Location Discovery

T1614

System Language Discovery

T1614.001

Virtualization/Sandbox Evasion

2