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
130s -
max time network
52s -
platform
windows7_x64 -
resource
win7-20220901-en -
resource tags
arch:x64arch:x86image:win7-20220901-enlocale:en-usos:windows7-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/适合win10-20H版本后/Fix_PrintSpooler.bat
-
Size
1KB
-
MD5
b4bcdad4dae1d57e6e38f81deb446e6e
-
SHA1
40509574224f0610c65e127cfc19f1664136d905
-
SHA256
7a7c4645e761205829d8c5490472b6d9371618ad5632ed96da29785496a0ee82
-
SHA512
696392c468fe0a0e9d168946c154eff1f08df839cd35fe27102b80eb66bd8f95d9c9f9375fd35372c154628e1a5dcd132d5c6a6842af7eaf501d51c61d34485c
Malware Config
Signatures
-
Possible privilege escalation attempt 3 IoCs
Processes:
takeown.exeicacls.exeicacls.exepid process 512 takeown.exe 832 icacls.exe 1680 icacls.exe -
Registers new Print Monitor 2 TTPs 5 IoCs
Processes:
spoolsv.exedescription ioc process Key created \REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\Print\Monitors\Local Port 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\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 -
Loads dropped DLL 1 IoCs
Processes:
spoolsv.exepid process 1836 spoolsv.exe -
Modifies file permissions 1 TTPs 3 IoCs
Processes:
icacls.exetakeown.exeicacls.exepid process 1680 icacls.exe 512 takeown.exe 832 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 -
Delays execution with timeout.exe 1 IoCs
Processes:
timeout.exepid process 576 timeout.exe -
Modifies data under HKEY_USERS 14 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-1-5-20\Software\Microsoft\Windows NT\CurrentVersion\PrinterPorts\Fax = "winspool,Ne01:,15,45" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\PrinterPorts\Fax = "winspool,Ne01:,15,45" 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-1-5-20\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\Devices\Fax = "winspool,Ne01:" 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\PrinterPorts 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 Set value (str) \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows NT\CurrentVersion\Devices\Fax = "winspool,Ne01:" spoolsv.exe Key created \REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\Devices spoolsv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows NT\CurrentVersion\Devices 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 -
Runs net.exe
-
Suspicious use of AdjustPrivilegeToken 8 IoCs
Processes:
takeown.exespoolsv.exedescription pid process Token: SeTakeOwnershipPrivilege 512 takeown.exe Token: SeRestorePrivilege 1836 spoolsv.exe Token: SeRestorePrivilege 1836 spoolsv.exe Token: SeRestorePrivilege 1836 spoolsv.exe Token: SeRestorePrivilege 1836 spoolsv.exe Token: SeRestorePrivilege 1836 spoolsv.exe Token: SeRestorePrivilege 1836 spoolsv.exe Token: SeRestorePrivilege 1836 spoolsv.exe -
Suspicious use of WriteProcessMemory 27 IoCs
Processes:
cmd.exenet.exenet.exedescription pid process target process PID 960 wrote to memory of 1992 960 cmd.exe net.exe PID 960 wrote to memory of 1992 960 cmd.exe net.exe PID 960 wrote to memory of 1992 960 cmd.exe net.exe PID 1992 wrote to memory of 1868 1992 net.exe net1.exe PID 1992 wrote to memory of 1868 1992 net.exe net1.exe PID 1992 wrote to memory of 1868 1992 net.exe net1.exe PID 960 wrote to memory of 576 960 cmd.exe timeout.exe PID 960 wrote to memory of 576 960 cmd.exe timeout.exe PID 960 wrote to memory of 576 960 cmd.exe timeout.exe PID 960 wrote to memory of 512 960 cmd.exe takeown.exe PID 960 wrote to memory of 512 960 cmd.exe takeown.exe PID 960 wrote to memory of 512 960 cmd.exe takeown.exe PID 960 wrote to memory of 832 960 cmd.exe icacls.exe PID 960 wrote to memory of 832 960 cmd.exe icacls.exe PID 960 wrote to memory of 832 960 cmd.exe icacls.exe PID 960 wrote to memory of 1680 960 cmd.exe icacls.exe PID 960 wrote to memory of 1680 960 cmd.exe icacls.exe PID 960 wrote to memory of 1680 960 cmd.exe icacls.exe PID 960 wrote to memory of 1756 960 cmd.exe reg.exe PID 960 wrote to memory of 1756 960 cmd.exe reg.exe PID 960 wrote to memory of 1756 960 cmd.exe reg.exe PID 960 wrote to memory of 860 960 cmd.exe net.exe PID 960 wrote to memory of 860 960 cmd.exe net.exe PID 960 wrote to memory of 860 960 cmd.exe net.exe PID 860 wrote to memory of 1788 860 net.exe net1.exe PID 860 wrote to memory of 1788 860 net.exe net1.exe PID 860 wrote to memory of 1788 860 net.exe net1.exe
Processes
-
C:\Windows\system32\cmd.execmd /c "C:\Users\Admin\AppData\Local\Temp\printerfix\适合win10-20H版本后\Fix_PrintSpooler.bat"1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
PID:960 -
C:\Windows\system32\net.exenet stop spooler2⤵
- Suspicious use of WriteProcessMemory
PID:1992 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 stop spooler3⤵PID:1868
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C:\Windows\system32\timeout.exetimeout /t 3 /nobreak2⤵
- Delays execution with timeout.exe
PID:576 -
C:\Windows\system32\takeown.exeTakeown /A /F C:\Windows\System32\win32spl.dll2⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
PID:512 -
C:\Windows\system32\icacls.exeicacls "C:\Windows\System32\win32spl.dll" /grant "administrators":F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:832 -
C:\Windows\system32\icacls.exeicacls "C:\Windows\System32\win32spl.dll" /grant SYSTEM:F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1680 -
C:\Windows\system32\reg.exereg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print" /v RpcAuthnLevelPrivacyEnabled /t REG_DWORD /d 0 /f2⤵PID:1756
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C:\Windows\system32\net.exenet start spooler2⤵
- Suspicious use of WriteProcessMemory
PID:860 -
C:\Windows\system32\net1.exeC:\Windows\system32\net1 start spooler3⤵PID:1788
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {995C996E-D918-4a8c-A302-45719A6F4EA7} -Embedding1⤵PID:904
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C:\Windows\System32\spoolsv.exeC:\Windows\System32\spoolsv.exe1⤵
- Registers new Print Monitor
- Loads dropped DLL
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:1836
Network
MITRE ATT&CK Enterprise v6
Replay Monitor
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Downloads
-
C:\Windows\System32\win32spl.dllFilesize
868KB
MD52e9581b7b9cd276a5ab115e4df69f6f9
SHA1800cdb03e4f2125200974a72f43653110426e56d
SHA256d417f0b2c3d9cc2bcae46358a391d308993ae537325663647ffb2d2c4679018a
SHA512c3e39ada472a82a707a6e3e79590c40cfc4fe5f46462fd7bd324ec682505a63be413e3453d703942985a73437d21ba6fac5b19ad96c4b55d524716fdf9257bd9
-
\Windows\System32\win32spl.dllFilesize
868KB
MD52e9581b7b9cd276a5ab115e4df69f6f9
SHA1800cdb03e4f2125200974a72f43653110426e56d
SHA256d417f0b2c3d9cc2bcae46358a391d308993ae537325663647ffb2d2c4679018a
SHA512c3e39ada472a82a707a6e3e79590c40cfc4fe5f46462fd7bd324ec682505a63be413e3453d703942985a73437d21ba6fac5b19ad96c4b55d524716fdf9257bd9
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memory/512-57-0x0000000000000000-mapping.dmp
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memory/576-56-0x0000000000000000-mapping.dmp
-
memory/832-58-0x0000000000000000-mapping.dmp
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memory/860-61-0x0000000000000000-mapping.dmp
-
memory/1680-59-0x0000000000000000-mapping.dmp
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memory/1756-60-0x0000000000000000-mapping.dmp
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memory/1788-62-0x0000000000000000-mapping.dmp
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memory/1868-55-0x0000000000000000-mapping.dmp
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memory/1992-54-0x0000000000000000-mapping.dmp