tofsee | 6a894de8a5d3285bbefc44ddf433b6a57b6199e649263204eed0d928de401ce2

System Information Discovery

persistence privilege_escalation

Processes:

76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe

description	ioc	process
Key value queried	\REGISTRY\USER\S-1-5-21-2494989678-839960665-2515455429-1000\Control Panel\International\Geo\Nation	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe

Deletes itself 1 IoCs

Processes:

svchost.exe

pid process

3404 svchost.exe
Executes dropped EXE 1 IoCs

Processes:

wsmsyasj.exe

pid process

4928 wsmsyasj.exe
Suspicious use of SetThreadContext 1 IoCs

Processes:

wsmsyasj.exe

description pid process target process

PID 4928 set thread context of 3404 4928 wsmsyasj.exe svchost.exe
Launches sc.exe 3 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exe

pid process

4952 sc.exe
3972 sc.exe
2120 sc.exe
Enumerates physical storage devices 1 TTPs
Attempts to interact with connected storage/optical drive(s).

System Information Discovery
T1082

pid	process
3404	svchost.exe

pid	process
4928	wsmsyasj.exe

description	pid	process	target process
PID 4928 set thread context of 3404	4928	wsmsyasj.exe	svchost.exe

pid	process
4952	sc.exe
3972	sc.exe
2120	sc.exe

Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

Netsh Helper DLL

T1546.007

Processes:

netsh.exe

description	ioc	process
Key queried	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key value enumerated	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe
Key opened	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\NetSh	netsh.exe

Checks processor information in registry 2 TTPs 3 IoCs

Processor information is often read in order to detect sandboxing environments.

Query Registry

System Information Discovery

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\CentralProcessor\0	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\~MHz	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\CentralProcessor\0\ProcessorNameString	EXCEL.EXE

Enumerates system info in registry 2 TTPs 3 IoCs

Query Registry

System Information Discovery

Processes:

EXCEL.EXE

description	ioc	process
Key opened	\REGISTRY\MACHINE\Hardware\Description\System\BIOS	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemFamily	EXCEL.EXE
Key value queried	\REGISTRY\MACHINE\HARDWARE\DESCRIPTION\System\BIOS\SystemSKU	EXCEL.EXE

Suspicious behavior: AddClipboardFormatListener 1 IoCs

Processes:

EXCEL.EXE

pid process

5044 EXCEL.EXE
Suspicious use of SetWindowsHookEx 9 IoCs

Processes:

EXCEL.EXE

pid process

5044 EXCEL.EXE
5044 EXCEL.EXE
5044 EXCEL.EXE
5044 EXCEL.EXE
5044 EXCEL.EXE
5044 EXCEL.EXE
5044 EXCEL.EXE
5044 EXCEL.EXE
5044 EXCEL.EXE

pid	process
5044	EXCEL.EXE

pid	process
5044	EXCEL.EXE
5044	EXCEL.EXE
5044	EXCEL.EXE
5044	EXCEL.EXE
5044	EXCEL.EXE
5044	EXCEL.EXE
5044	EXCEL.EXE
5044	EXCEL.EXE
5044	EXCEL.EXE

Suspicious use of WriteProcessMemory 23 IoCs

Processes:

76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exewsmsyasj.exe

description	pid	process	target process
PID 2352 wrote to memory of 3544	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	cmd.exe
PID 2352 wrote to memory of 3544	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	cmd.exe
PID 2352 wrote to memory of 3544	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	cmd.exe
PID 2352 wrote to memory of 1572	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	cmd.exe
PID 2352 wrote to memory of 1572	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	cmd.exe
PID 2352 wrote to memory of 1572	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	cmd.exe
PID 2352 wrote to memory of 4952	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	sc.exe
PID 2352 wrote to memory of 4952	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	sc.exe
PID 2352 wrote to memory of 4952	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	sc.exe
PID 2352 wrote to memory of 3972	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	sc.exe
PID 2352 wrote to memory of 3972	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	sc.exe
PID 2352 wrote to memory of 3972	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	sc.exe
PID 2352 wrote to memory of 2120	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	sc.exe
PID 2352 wrote to memory of 2120	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	sc.exe
PID 2352 wrote to memory of 2120	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	sc.exe
PID 4928 wrote to memory of 3404	4928	wsmsyasj.exe	svchost.exe
PID 4928 wrote to memory of 3404	4928	wsmsyasj.exe	svchost.exe
PID 4928 wrote to memory of 3404	4928	wsmsyasj.exe	svchost.exe
PID 4928 wrote to memory of 3404	4928	wsmsyasj.exe	svchost.exe
PID 4928 wrote to memory of 3404	4928	wsmsyasj.exe	svchost.exe
PID 2352 wrote to memory of 2544	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	netsh.exe
PID 2352 wrote to memory of 2544	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	netsh.exe
PID 2352 wrote to memory of 2544	2352	76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe	netsh.exe

C:\Users\Admin\AppData\Local\Temp\76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe
"C:\Users\Admin\AppData\Local\Temp\76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe"
1⤵
- Checks computer location settings
- Suspicious use of WriteProcessMemory
PID:2352

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\svkwlpjf\
2⤵
PID:3544

C:\Windows\SysWOW64\cmd.exe
"C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wsmsyasj.exe" C:\Windows\SysWOW64\svkwlpjf\
2⤵
PID:1572

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" create svkwlpjf binPath= "C:\Windows\SysWOW64\svkwlpjf\wsmsyasj.exe /d\"C:\Users\Admin\AppData\Local\Temp\76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe\"" type= own start= auto DisplayName= "wifi support"
2⤵
- Launches sc.exe
PID:4952

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" description svkwlpjf "wifi internet conection"
2⤵
- Launches sc.exe
PID:3972

C:\Windows\SysWOW64\sc.exe
"C:\Windows\System32\sc.exe" start svkwlpjf
2⤵
- Launches sc.exe
PID:2120

C:\Windows\SysWOW64\netsh.exe
"C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
2⤵
- Modifies Windows Firewall
- Event Triggered Execution: Netsh Helper DLL
PID:2544

C:\Windows\SysWOW64\svkwlpjf\wsmsyasj.exe
C:\Windows\SysWOW64\svkwlpjf\wsmsyasj.exe /d"C:\Users\Admin\AppData\Local\Temp\76ede4f29dbd8a75b643e46cabd369ac888b8012630b8b244e08e0baac8535e6.exe"
1⤵
- Executes dropped EXE
- Suspicious use of SetThreadContext
- Suspicious use of WriteProcessMemory
PID:4928

C:\Windows\SysWOW64\svchost.exe
svchost.exe
2⤵
- Sets service image path in registry
- Deletes itself
PID:3404

C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE
"C:\Program Files\Microsoft Office\Root\Office16\EXCEL.EXE" "C:\Users\Admin\Desktop\RestoreStop.xlsm"
1⤵
- Checks processor information in registry
- Enumerates system info in registry
- Suspicious behavior: AddClipboardFormatListener
- Suspicious use of SetWindowsHookEx
PID:5044

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

T1569

Service Execution

T1569.002

Persistence

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

T1547

Registry Run Keys / Startup Folder

T1547.001

Create or Modify System Process

T1543

Windows Service

T1543.003

Event Triggered Execution

T1546

Netsh Helper DLL

T1546.007

Defense Evasion

Impair Defenses

T1562

Disable or Modify System Firewall

Modify Registry

Credential Access

Discovery

Query Registry

3

System Information Discovery

4