formbook | 05fafaa473d50e4df54ac7f838b816f90fbb1cc1313cd514a275aed45ac1f6c3

System Information Discovery

Processes:

PO.9758752img.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	PO.9758752img.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	PO.9758752img.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:

PO.9758752img.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-3751123196-3323558407-1869646069-1000\Control Panel\International\Geo\Nation	PO.9758752img.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:

PO.9758752img.exe

description	ioc	process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\Disk\Enum	PO.9758752img.exe
Key value queried	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Services\disk\Enum\0	PO.9758752img.exe

Suspicious use of SetThreadContext 3 IoCs

Processes:

PO.9758752img.exeMSBuild.execscript.exe

description	pid	process	target process
PID 5036 set thread context of 1980	5036	PO.9758752img.exe	MSBuild.exe
PID 1980 set thread context of 3164	1980	MSBuild.exe	Explorer.EXE
PID 336 set thread context of 3164	336	cscript.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

4968 schtasks.exe

pid	process
4968	schtasks.exe

Suspicious behavior: EnumeratesProcesses 13 IoCs

Processes:

PO.9758752img.exeMSBuild.execscript.exe

pid	process
5036	PO.9758752img.exe
5036	PO.9758752img.exe
5036	PO.9758752img.exe
1980	MSBuild.exe
1980	MSBuild.exe
1980	MSBuild.exe
1980	MSBuild.exe
336	cscript.exe
336	cscript.exe
336	cscript.exe
336	cscript.exe
336	cscript.exe
336	cscript.exe

Suspicious behavior: MapViewOfSection 5 IoCs

Processes:

MSBuild.execscript.exe

pid process

1980 MSBuild.exe
1980 MSBuild.exe
1980 MSBuild.exe
336 cscript.exe
336 cscript.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

PO.9758752img.exeMSBuild.execscript.exe

description pid process

Token: SeDebugPrivilege 5036 PO.9758752img.exe
Token: SeDebugPrivilege 1980 MSBuild.exe
Token: SeDebugPrivilege 336 cscript.exe

pid	process
1980	MSBuild.exe
1980	MSBuild.exe
1980	MSBuild.exe
336	cscript.exe
336	cscript.exe

description	pid	process
Token: SeDebugPrivilege	5036	PO.9758752img.exe
Token: SeDebugPrivilege	1980	MSBuild.exe
Token: SeDebugPrivilege	336	cscript.exe

Suspicious use of WriteProcessMemory 15 IoCs

Processes:

PO.9758752img.exeExplorer.EXEcscript.exe

description	pid	process	target process
PID 5036 wrote to memory of 4968	5036	PO.9758752img.exe	schtasks.exe
PID 5036 wrote to memory of 4968	5036	PO.9758752img.exe	schtasks.exe
PID 5036 wrote to memory of 4968	5036	PO.9758752img.exe	schtasks.exe
PID 5036 wrote to memory of 1980	5036	PO.9758752img.exe	MSBuild.exe
PID 5036 wrote to memory of 1980	5036	PO.9758752img.exe	MSBuild.exe
PID 5036 wrote to memory of 1980	5036	PO.9758752img.exe	MSBuild.exe
PID 5036 wrote to memory of 1980	5036	PO.9758752img.exe	MSBuild.exe
PID 5036 wrote to memory of 1980	5036	PO.9758752img.exe	MSBuild.exe
PID 5036 wrote to memory of 1980	5036	PO.9758752img.exe	MSBuild.exe
PID 3164 wrote to memory of 336	3164	Explorer.EXE	cscript.exe
PID 3164 wrote to memory of 336	3164	Explorer.EXE	cscript.exe
PID 3164 wrote to memory of 336	3164	Explorer.EXE	cscript.exe
PID 336 wrote to memory of 4936	336	cscript.exe	cmd.exe
PID 336 wrote to memory of 4936	336	cscript.exe	cmd.exe
PID 336 wrote to memory of 4936	336	cscript.exe	cmd.exe

C:\Windows\Explorer.EXE
C:\Windows\Explorer.EXE
1⤵
- Suspicious use of WriteProcessMemory
PID:3164

C:\Users\Admin\AppData\Local\Temp\PO.9758752img.exe
"C:\Users\Admin\AppData\Local\Temp\PO.9758752img.exe"
2⤵
- 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:5036

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\cWBTWBNA" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB2B1.tmp"
3⤵
- Creates scheduled task(s)
PID:4968

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:1980

C:\Windows\SysWOW64\cscript.exe
"C:\Windows\SysWOW64\cscript.exe"
2⤵
- Suspicious use of SetThreadContext
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: MapViewOfSection
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:336

C:\Windows\SysWOW64\cmd.exe
/c del "C:\Windows\Microsoft.NET\Framework\v2.0.50727\MSBuild.exe"
3⤵
PID:4936

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