Overview
overview
8Static
static
printerfix...er.bat
windows7-x64
8printerfix...er.bat
windows10-2004-x64
8printerfix...pl.dll
windows7-x64
1printerfix...pl.dll
windows10-2004-x64
1printerfix...er.bat
windows7-x64
8printerfix...er.bat
windows10-2004-x64
8printerfix...pl.dll
windows7-x64
1printerfix...pl.dll
windows10-2004-x64
1printerfix...er.bat
windows7-x64
8printerfix...er.bat
windows10-2004-x64
8printerfix...pl.dll
windows7-x64
1printerfix...pl.dll
windows10-2004-x64
1printerfix...er.bat
windows7-x64
8printerfix...er.bat
windows10-2004-x64
8printerfix...pl.dll
windows7-x64
1printerfix...pl.dll
windows10-2004-x64
1printerfix...er.bat
windows7-x64
8printerfix...er.bat
windows10-2004-x64
8printerfix...pl.dll
windows7-x64
8printerfix...pl.dll
windows10-2004-x64
8printerfix...pl.dll
windows7-x64
1printerfix...pl.dll
windows10-2004-x64
1printerfix...sv.exe
windows7-x64
printerfix...sv.exe
windows10-2004-x64
1printerfix...pl.dll
windows7-x64
1printerfix...pl.dll
windows10-2004-x64
1printerfix...er.bat
windows7-x64
8printerfix...er.bat
windows10-2004-x64
8printerfix...pl.dll
windows7-x64
1printerfix...pl.dll
windows10-2004-x64
1Analysis
-
max time kernel
142s -
max time network
147s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
06-11-2022 08:10
Static task
static1
Behavioral task
behavioral1
Sample
printerfix/LTSC/Fix_PrintSpooler.bat
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
printerfix/LTSC/Fix_PrintSpooler.bat
Resource
win10v2004-20220812-en
Behavioral task
behavioral3
Sample
printerfix/LTSC/win32spl.dll
Resource
win7-20220812-en
Behavioral task
behavioral4
Sample
printerfix/LTSC/win32spl.dll
Resource
win10v2004-20220812-en
Behavioral task
behavioral5
Sample
printerfix/Win 2012/Fix_PrintSpooler.bat
Resource
win7-20220901-en
Behavioral task
behavioral6
Sample
printerfix/Win 2012/Fix_PrintSpooler.bat
Resource
win10v2004-20220812-en
Behavioral task
behavioral7
Sample
printerfix/Win 2012/win32spl.dll
Resource
win7-20220901-en
Behavioral task
behavioral8
Sample
printerfix/Win 2012/win32spl.dll
Resource
win10v2004-20220812-en
Behavioral task
behavioral9
Sample
printerfix/Win 2016/Fix_PrintSpooler.bat
Resource
win7-20220812-en
Behavioral task
behavioral10
Sample
printerfix/Win 2016/Fix_PrintSpooler.bat
Resource
win10v2004-20220812-en
Behavioral task
behavioral11
Sample
printerfix/Win 2016/win32spl.dll
Resource
win7-20220901-en
Behavioral task
behavioral12
Sample
printerfix/Win 2016/win32spl.dll
Resource
win10v2004-20220812-en
Behavioral task
behavioral13
Sample
printerfix/Win 2019/Fix_PrintSpooler.bat
Resource
win7-20220812-en
Behavioral task
behavioral14
Sample
printerfix/Win 2019/Fix_PrintSpooler.bat
Resource
win10v2004-20220901-en
Behavioral task
behavioral15
Sample
printerfix/Win 2019/win32spl.dll
Resource
win7-20220901-en
Behavioral task
behavioral16
Sample
printerfix/Win 2019/win32spl.dll
Resource
win10v2004-20220812-en
Behavioral task
behavioral17
Sample
printerfix/win7/Fix_PrintSpooler.bat
Resource
win7-20220812-en
Behavioral task
behavioral18
Sample
printerfix/win7/Fix_PrintSpooler.bat
Resource
win10v2004-20220812-en
Behavioral task
behavioral19
Sample
printerfix/win7/win32spl.dll
Resource
win7-20220812-en
Behavioral task
behavioral20
Sample
printerfix/win7/win32spl.dll
Resource
win10v2004-20220901-en
Behavioral task
behavioral21
Sample
printerfix/旧文件归档/localspl.dll
Resource
win7-20220812-en
Behavioral task
behavioral22
Sample
printerfix/旧文件归档/localspl.dll
Resource
win10v2004-20220901-en
Behavioral task
behavioral23
Sample
printerfix/旧文件归档/spoolsv.exe
Resource
win7-20220812-en
Behavioral task
behavioral24
Sample
printerfix/旧文件归档/spoolsv.exe
Resource
win10v2004-20220901-en
Behavioral task
behavioral25
Sample
printerfix/旧文件归档/win32spl.dll
Resource
win7-20220901-en
Behavioral task
behavioral26
Sample
printerfix/旧文件归档/win32spl.dll
Resource
win10v2004-20220812-en
Behavioral task
behavioral27
Sample
printerfix/适合win10-20H版本后/Fix_PrintSpooler.bat
Resource
win7-20220901-en
Behavioral task
behavioral28
Sample
printerfix/适合win10-20H版本后/Fix_PrintSpooler.bat
Resource
win10v2004-20220812-en
Behavioral task
behavioral29
Sample
printerfix/适合win10-20H版本后/win32spl.dll
Resource
win7-20220812-en
Behavioral task
behavioral30
Sample
printerfix/适合win10-20H版本后/win32spl.dll
Resource
win10v2004-20220812-en
General
-
Target
printerfix/win7/Fix_PrintSpooler.bat
-
Size
1KB
-
MD5
b4bcdad4dae1d57e6e38f81deb446e6e
-
SHA1
40509574224f0610c65e127cfc19f1664136d905
-
SHA256
7a7c4645e761205829d8c5490472b6d9371618ad5632ed96da29785496a0ee82
-
SHA512
696392c468fe0a0e9d168946c154eff1f08df839cd35fe27102b80eb66bd8f95d9c9f9375fd35372c154628e1a5dcd132d5c6a6842af7eaf501d51c61d34485c
Malware Config
Signatures
-
Possible privilege escalation attempt 3 IoCs
Processes:
icacls.exetakeown.exeicacls.exepid process 4836 icacls.exe 4936 takeown.exe 5036 icacls.exe -
Registers new Print Monitor 2 TTPs 12 IoCs
Processes:
spoolsv.exedescription ioc process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\WSD Port\Adapters\WSPrint spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\Local Port spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\Standard TCP/IP Port spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\Standard TCP/IP Port\Ports spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\WSD Port spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\WSD Port\Ports spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\WSD Port\Adapters\IPP spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\WSD Port\Adapters\WSPrint\OfflinePorts spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\Appmon spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\Appmon\Ports spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\Microsoft Shared Fax Monitor spoolsv.exe Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\USB Monitor spoolsv.exe -
Loads dropped DLL 1 IoCs
Processes:
spoolsv.exepid process 1600 spoolsv.exe -
Modifies file permissions 1 TTPs 3 IoCs
Processes:
takeown.exeicacls.exeicacls.exepid process 4936 takeown.exe 5036 icacls.exe 4836 icacls.exe -
Drops file in System32 directory 2 IoCs
Processes:
cmd.exedescription ioc process File created C:\Windows\System32\win32spl.dll cmd.exe File opened for modification C:\Windows\System32\win32spl.dll cmd.exe -
Checks SCSI registry key(s) 3 TTPs 12 IoCs
SCSI information is often read in order to detect sandboxing environments.
Processes:
spoolsv.exedescription ioc process Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000 spoolsv.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\HardwareID spoolsv.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\HardwareID spoolsv.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\HardwareID spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\Properties\{3b2ce006-5e61-4fde-bab8-9b8aac9b26df}\0002 spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002\Properties\{3b2ce006-5e61-4fde-bab8-9b8aac9b26df}\0002 spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000 spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_DADY&Prod_DADY_DVD-ROM\4&215468a5&0&010000\Properties\{3b2ce006-5e61-4fde-bab8-9b8aac9b26df}\0002 spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\Disk&Ven_DADY&Prod_HARDDISK\4&215468a5&0&000000\Properties\{3b2ce006-5e61-4fde-bab8-9b8aac9b26df}\0002 spoolsv.exe Key value queried \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001\HardwareID spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000001 spoolsv.exe Key opened \REGISTRY\MACHINE\SYSTEM\ControlSet001\Enum\SCSI\CdRom&Ven_Msft&Prod_Virtual_DVD-ROM\2&1f4adffe&0&000002 spoolsv.exe -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 4948 timeout.exe -
Modifies data under HKEY_USERS 18 IoCs
Processes:
spoolsv.exedescription ioc process Key created \REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\PrinterPorts spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Windows NT\CurrentVersion\PrinterPorts\Microsoft Print to PDF = "winspool,Ne01:,15,45" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows NT\CurrentVersion\PrinterPorts\Fax = "winspool,Ne02:,15,45" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Devices\Microsoft Print to PDF = "winspool,Ne01:" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows NT\CurrentVersion\PrinterPorts\Microsoft Print to PDF = "winspool,Ne01:,15,45" spoolsv.exe Key created \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows NT\CurrentVersion\PrinterPorts spoolsv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows NT\CurrentVersion\Devices spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Devices\Microsoft Print to PDF = "winspool,Ne01:" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Windows NT\CurrentVersion\PrinterPorts\Fax = "winspool,Ne02:,15,45" spoolsv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows NT\CurrentVersion\PrinterPorts spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Devices\Fax = "winspool,Ne02:" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows NT\CurrentVersion\PrinterPorts\Microsoft XPS Document Writer = "winspool,Ne00:,15,45" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Devices\Fax = "winspool,Ne02:" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-20\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Devices\Microsoft XPS Document Writer = "winspool,Ne00:" spoolsv.exe Key created \REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\Devices spoolsv.exe Key created \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows NT\CurrentVersion\Devices spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Devices\Microsoft XPS Document Writer = "winspool,Ne00:" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-19\SOFTWARE\Microsoft\Windows NT\CurrentVersion\PrinterPorts\Microsoft XPS Document Writer = "winspool,Ne00:,15,45" spoolsv.exe -
Runs net.exe
-
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
takeown.exedescription pid process Token: SeTakeOwnershipPrivilege 4936 takeown.exe -
Suspicious use of WriteProcessMemory 18 IoCs
Processes:
cmd.exenet.exenet.exedescription pid process target process PID 4244 wrote to memory of 3212 4244 cmd.exe net.exe PID 4244 wrote to memory of 3212 4244 cmd.exe net.exe PID 3212 wrote to memory of 4056 3212 net.exe net1.exe PID 3212 wrote to memory of 4056 3212 net.exe net1.exe PID 4244 wrote to memory of 4948 4244 cmd.exe timeout.exe PID 4244 wrote to memory of 4948 4244 cmd.exe timeout.exe PID 4244 wrote to memory of 4936 4244 cmd.exe takeown.exe PID 4244 wrote to memory of 4936 4244 cmd.exe takeown.exe PID 4244 wrote to memory of 5036 4244 cmd.exe icacls.exe PID 4244 wrote to memory of 5036 4244 cmd.exe icacls.exe PID 4244 wrote to memory of 4836 4244 cmd.exe icacls.exe PID 4244 wrote to memory of 4836 4244 cmd.exe icacls.exe PID 4244 wrote to memory of 1432 4244 cmd.exe reg.exe PID 4244 wrote to memory of 1432 4244 cmd.exe reg.exe PID 4244 wrote to memory of 424 4244 cmd.exe net.exe PID 4244 wrote to memory of 424 4244 cmd.exe net.exe PID 424 wrote to memory of 4204 424 net.exe net1.exe PID 424 wrote to memory of 4204 424 net.exe net1.exe
Processes
-
C:\Windows\system32\cmd.exeC:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\printerfix\win7\Fix_PrintSpooler.bat"1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\net.exenet stop spooler2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 stop spooler3⤵
-
C:\Windows\system32\timeout.exetimeout /t 3 /nobreak2⤵
- Delays execution with timeout.exe
-
C:\Windows\system32\takeown.exeTakeown /A /F C:\Windows\System32\win32spl.dll2⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
-
C:\Windows\system32\icacls.exeicacls "C:\Windows\System32\win32spl.dll" /grant "administrators":F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
-
C:\Windows\system32\icacls.exeicacls "C:\Windows\System32\win32spl.dll" /grant SYSTEM:F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
-
C:\Windows\system32\reg.exereg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print" /v RpcAuthnLevelPrivacyEnabled /t REG_DWORD /d 0 /f2⤵
-
C:\Windows\system32\net.exenet start spooler2⤵
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\net1.exeC:\Windows\system32\net1 start spooler3⤵
-
C:\Windows\System32\spoolsv.exeC:\Windows\System32\spoolsv.exe1⤵
- Registers new Print Monitor
- Loads dropped DLL
- Checks SCSI registry key(s)
- Modifies data under HKEY_USERS
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
Loading Replay Monitor...
Downloads
-
C:\Windows\System32\win32spl.dllFilesize
743KB
MD56fc904493f366f0a10d6cd03a8c4b933
SHA1c8cac1aa85ac7417ea64d3ad77b7c13ebc02f1f4
SHA25681be67de5cbff88e8b950fc28a786dc64c8de80e9aba4438432ab9f1776af1aa
SHA512ab438ed0b4c87825b0219050185892fbc1831c3343ef6bb03276fa02615b0e9ea8adb844a5f5fd617ba62560d99fc325246ad29c3e774840342f814c9a0dbfb7
-
C:\Windows\System32\win32spl.dllFilesize
743KB
MD56fc904493f366f0a10d6cd03a8c4b933
SHA1c8cac1aa85ac7417ea64d3ad77b7c13ebc02f1f4
SHA25681be67de5cbff88e8b950fc28a786dc64c8de80e9aba4438432ab9f1776af1aa
SHA512ab438ed0b4c87825b0219050185892fbc1831c3343ef6bb03276fa02615b0e9ea8adb844a5f5fd617ba62560d99fc325246ad29c3e774840342f814c9a0dbfb7
-
memory/424-139-0x0000000000000000-mapping.dmp
-
memory/1432-138-0x0000000000000000-mapping.dmp
-
memory/3212-132-0x0000000000000000-mapping.dmp
-
memory/4056-133-0x0000000000000000-mapping.dmp
-
memory/4204-140-0x0000000000000000-mapping.dmp
-
memory/4836-137-0x0000000000000000-mapping.dmp
-
memory/4936-135-0x0000000000000000-mapping.dmp
-
memory/4948-134-0x0000000000000000-mapping.dmp
-
memory/5036-136-0x0000000000000000-mapping.dmp