masslogger | 878427ff4f8b57e78c216c3295b5c477c1066afcac08c987f0599fa044f1dab4

System Information Discovery

Processes:

Commercial Invoice.PDF.exe

description	ioc	process
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\SystemBiosVersion	Commercial Invoice.PDF.exe
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\VideoBiosVersion	Commercial Invoice.PDF.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:

Commercial Invoice.PDF.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-1809750270-3141839489-3074374771-1000\Control Panel\International\Geo\Nation	Commercial Invoice.PDF.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:

Commercial Invoice.PDF.exe

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

Suspicious use of SetThreadContext 1 IoCs

Processes:

Commercial Invoice.PDF.exe

description pid process target process

PID 4660 set thread context of 3668 4660 Commercial Invoice.PDF.exe Commercial Invoice.PDF.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

3188 schtasks.exe

description	pid	process	target process
PID 4660 set thread context of 3668	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe

pid	process
3188	schtasks.exe

Suspicious behavior: EnumeratesProcesses 7 IoCs

Processes:

Commercial Invoice.PDF.exepowershell.exe

pid	process
4660	Commercial Invoice.PDF.exe
4660	Commercial Invoice.PDF.exe
4660	Commercial Invoice.PDF.exe
4660	Commercial Invoice.PDF.exe
4660	Commercial Invoice.PDF.exe
1668	powershell.exe
1668	powershell.exe

Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

Commercial Invoice.PDF.exeCommercial Invoice.PDF.exepowershell.exe

description	pid	process
Token: SeDebugPrivilege	4660	Commercial Invoice.PDF.exe
Token: SeDebugPrivilege	3668	Commercial Invoice.PDF.exe
Token: SeDebugPrivilege	1668	powershell.exe

Suspicious use of WriteProcessMemory 20 IoCs

Processes:

Commercial Invoice.PDF.exeCommercial Invoice.PDF.execmd.exe

description	pid	process	target process
PID 4660 wrote to memory of 3188	4660	Commercial Invoice.PDF.exe	schtasks.exe
PID 4660 wrote to memory of 3188	4660	Commercial Invoice.PDF.exe	schtasks.exe
PID 4660 wrote to memory of 3188	4660	Commercial Invoice.PDF.exe	schtasks.exe
PID 4660 wrote to memory of 3444	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3444	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3444	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3668	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3668	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3668	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3668	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3668	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3668	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3668	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 4660 wrote to memory of 3668	4660	Commercial Invoice.PDF.exe	Commercial Invoice.PDF.exe
PID 3668 wrote to memory of 4048	3668	Commercial Invoice.PDF.exe	cmd.exe
PID 3668 wrote to memory of 4048	3668	Commercial Invoice.PDF.exe	cmd.exe
PID 3668 wrote to memory of 4048	3668	Commercial Invoice.PDF.exe	cmd.exe
PID 4048 wrote to memory of 1668	4048	cmd.exe	powershell.exe
PID 4048 wrote to memory of 1668	4048	cmd.exe	powershell.exe
PID 4048 wrote to memory of 1668	4048	cmd.exe	powershell.exe

C:\Users\Admin\AppData\Local\Temp\Commercial Invoice.PDF.exe
"C:\Users\Admin\AppData\Local\Temp\Commercial Invoice.PDF.exe"
1⤵
- 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:4660

C:\Windows\SysWOW64\schtasks.exe
"C:\Windows\System32\schtasks.exe" /Create /TN "Updates\AOEwkQzimfZCfK" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4F29.tmp"
2⤵
- Creates scheduled task(s)
PID:3188

C:\Users\Admin\AppData\Local\Temp\Commercial Invoice.PDF.exe
"{path}"
2⤵
PID:3444

C:\Users\Admin\AppData\Local\Temp\Commercial Invoice.PDF.exe
"{path}"
2⤵
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:3668

C:\Windows\SysWOW64\cmd.exe
"cmd" /c start /b powershell Start-Sleep -Seconds 2; Remove-Item -path 'C:\Users\Admin\AppData\Local\Temp\Commercial Invoice.PDF.exe' & exit
3⤵
- Suspicious use of WriteProcessMemory
PID:4048

C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
powershell Start-Sleep -Seconds 2; Remove-Item -path 'C:\Users\Admin\AppData\Local\Temp\Commercial Invoice.PDF.exe'
4⤵
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1668

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