formbook | b13f0477dc1fa39cf53bb31ea61dc7068e57135953283538cb16155703d6c609

System Information Discovery

Processes:

mgkreERjvr7XiMz.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	mgkreERjvr7XiMz.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	mgkreERjvr7XiMz.exe

Checks computer location settings 2 TTPs 1 IoCs

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

Query Registry

System Information Discovery

Processes:

mgkreERjvr7XiMz.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	mgkreERjvr7XiMz.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

Processes:

mgkreERjvr7XiMz.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	mgkreERjvr7XiMz.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	mgkreERjvr7XiMz.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

mgkreERjvr7XiMz.exeMSBuild.execolorcpl.exe

description	pid	process	target process
PID 3004 set thread context of 4276	3004	mgkreERjvr7XiMz.exe	MSBuild.exe
PID 4276 set thread context of 3136	4276	MSBuild.exe	Explorer.EXE
PID 4012 set thread context of 3136	4012	colorcpl.exe	Explorer.EXE

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
T1053

Processes:

schtasks.exe

pid process

260 schtasks.exe

pid	process
260	schtasks.exe

Suspicious behavior: EnumeratesProcesses 24 IoCs

Processes:

MSBuild.execolorcpl.exe

pid	process
4276	MSBuild.exe
4276	MSBuild.exe
4276	MSBuild.exe
4276	MSBuild.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe
4012	colorcpl.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

MSBuild.execolorcpl.exe

pid process

4276 MSBuild.exe
4276 MSBuild.exe
4276 MSBuild.exe
4012 colorcpl.exe
4012 colorcpl.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

mgkreERjvr7XiMz.exeMSBuild.execolorcpl.exe

description pid process

Token: SeDebugPrivilege 3004 mgkreERjvr7XiMz.exe
Token: SeDebugPrivilege 4276 MSBuild.exe
Token: SeDebugPrivilege 4012 colorcpl.exe

description	pid	process
Token: SeDebugPrivilege	3004	mgkreERjvr7XiMz.exe
Token: SeDebugPrivilege	4276	MSBuild.exe
Token: SeDebugPrivilege	4012	colorcpl.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

mgkreERjvr7XiMz.exeExplorer.EXEcolorcpl.exe

description	pid	process	target process
PID 3004 wrote to memory of 260	3004	mgkreERjvr7XiMz.exe	schtasks.exe
PID 3004 wrote to memory of 260	3004	mgkreERjvr7XiMz.exe	schtasks.exe
PID 3004 wrote to memory of 260	3004	mgkreERjvr7XiMz.exe	schtasks.exe
PID 3004 wrote to memory of 4276	3004	mgkreERjvr7XiMz.exe	MSBuild.exe
PID 3004 wrote to memory of 4276	3004	mgkreERjvr7XiMz.exe	MSBuild.exe
PID 3004 wrote to memory of 4276	3004	mgkreERjvr7XiMz.exe	MSBuild.exe
PID 3004 wrote to memory of 4276	3004	mgkreERjvr7XiMz.exe	MSBuild.exe
PID 3004 wrote to memory of 4276	3004	mgkreERjvr7XiMz.exe	MSBuild.exe
PID 3004 wrote to memory of 4276	3004	mgkreERjvr7XiMz.exe	MSBuild.exe
PID 3136 wrote to memory of 4012	3136	Explorer.EXE	colorcpl.exe
PID 3136 wrote to memory of 4012	3136	Explorer.EXE	colorcpl.exe
PID 3136 wrote to memory of 4012	3136	Explorer.EXE	colorcpl.exe
PID 4012 wrote to memory of 3472	4012	colorcpl.exe	cmd.exe
PID 4012 wrote to memory of 3472	4012	colorcpl.exe	cmd.exe
PID 4012 wrote to memory of 3472	4012	colorcpl.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3136

C:\Users\Admin\AppData\Local\Temp\mgkreERjvr7XiMz.exe
"C:\Users\Admin\AppData\Local\Temp\mgkreERjvr7XiMz.exe"
2⤵
- Checks BIOS information in registry
- Checks computer location settings
- Maps connected drives based on registry
- Suspicious use of SetThreadContext
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3004

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\jlygIECUDei" /XML "C:\Users\Admin\AppData\Local\Temp\tmp821C.tmp"
3⤵
- Creates scheduled task(s)
PID:260

C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe
"{path}"
3⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
PID:4276

C:\Windows\SysWOW64\colorcpl.exe
"C:\Windows\SysWOW64\colorcpl.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:4012

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe"
3⤵
PID:3472

Network

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

Virtualization/Sandbox Evasion

2

T1497

Credential Access

Discovery

Query Registry

5

Virtualization/Sandbox Evasion

2

T1497

System Information Discovery

4

Peripheral Device Discovery