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
164s -
max time network
46s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-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/Win 2019/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 1784 takeown.exe 1976 icacls.exe 268 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 1156 spoolsv.exe -
Modifies file permissions 1 TTPs 3 IoCs
Processes:
takeown.exeicacls.exeicacls.exepid process 1784 takeown.exe 1976 icacls.exe 268 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 1888 timeout.exe -
Modifies data under HKEY_USERS 14 IoCs
Processes:
spoolsv.exedescription ioc process Key created \REGISTRY\USER\S-1-5-20\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-1-5-19\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\PrinterPorts\Fax = "winspool,Ne01:,15,45" spoolsv.exe Key created \REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\Devices spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\Devices\Fax = "winspool,Ne01:" 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,Ne01:" 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 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\Devices\Microsoft XPS Document Writer = "winspool,Ne00:" spoolsv.exe Key created \REGISTRY\USER\S-1-5-19\Software\Microsoft\Windows NT\CurrentVersion\PrinterPorts spoolsv.exe Key created \REGISTRY\USER\.DEFAULT\Software\Microsoft\Windows NT\CurrentVersion\PrinterPorts spoolsv.exe Key created \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows NT\CurrentVersion\Devices spoolsv.exe -
Runs net.exe
-
Suspicious use of AdjustPrivilegeToken 8 IoCs
Processes:
takeown.exespoolsv.exedescription pid process Token: SeTakeOwnershipPrivilege 1784 takeown.exe Token: SeRestorePrivilege 1156 spoolsv.exe Token: SeRestorePrivilege 1156 spoolsv.exe Token: SeRestorePrivilege 1156 spoolsv.exe Token: SeRestorePrivilege 1156 spoolsv.exe Token: SeRestorePrivilege 1156 spoolsv.exe Token: SeRestorePrivilege 1156 spoolsv.exe Token: SeRestorePrivilege 1156 spoolsv.exe -
Suspicious use of WriteProcessMemory 27 IoCs
Processes:
cmd.exenet.exenet.exedescription pid process target process PID 1388 wrote to memory of 1232 1388 cmd.exe net.exe PID 1388 wrote to memory of 1232 1388 cmd.exe net.exe PID 1388 wrote to memory of 1232 1388 cmd.exe net.exe PID 1232 wrote to memory of 1348 1232 net.exe net1.exe PID 1232 wrote to memory of 1348 1232 net.exe net1.exe PID 1232 wrote to memory of 1348 1232 net.exe net1.exe PID 1388 wrote to memory of 1888 1388 cmd.exe timeout.exe PID 1388 wrote to memory of 1888 1388 cmd.exe timeout.exe PID 1388 wrote to memory of 1888 1388 cmd.exe timeout.exe PID 1388 wrote to memory of 1784 1388 cmd.exe takeown.exe PID 1388 wrote to memory of 1784 1388 cmd.exe takeown.exe PID 1388 wrote to memory of 1784 1388 cmd.exe takeown.exe PID 1388 wrote to memory of 1976 1388 cmd.exe icacls.exe PID 1388 wrote to memory of 1976 1388 cmd.exe icacls.exe PID 1388 wrote to memory of 1976 1388 cmd.exe icacls.exe PID 1388 wrote to memory of 268 1388 cmd.exe icacls.exe PID 1388 wrote to memory of 268 1388 cmd.exe icacls.exe PID 1388 wrote to memory of 268 1388 cmd.exe icacls.exe PID 1388 wrote to memory of 520 1388 cmd.exe reg.exe PID 1388 wrote to memory of 520 1388 cmd.exe reg.exe PID 1388 wrote to memory of 520 1388 cmd.exe reg.exe PID 1388 wrote to memory of 1436 1388 cmd.exe net.exe PID 1388 wrote to memory of 1436 1388 cmd.exe net.exe PID 1388 wrote to memory of 1436 1388 cmd.exe net.exe PID 1436 wrote to memory of 432 1436 net.exe net1.exe PID 1436 wrote to memory of 432 1436 net.exe net1.exe PID 1436 wrote to memory of 432 1436 net.exe net1.exe
Processes
-
C:\Windows\system32\cmd.execmd /c "C:\Users\Admin\AppData\Local\Temp\printerfix\Win 2019\Fix_PrintSpooler.bat"1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
-
C:\Windows\system32\net.exenet stop spooler2⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 stop spooler3⤵
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C:\Windows\system32\timeout.exetimeout /t 3 /nobreak2⤵
- Delays execution with timeout.exe
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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
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C:\Windows\system32\net1.exeC:\Windows\system32\net1 start spooler3⤵
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C:\Windows\System32\rundll32.exeC:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {995C996E-D918-4a8c-A302-45719A6F4EA7} -Embedding1⤵
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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
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
-
C:\Windows\System32\win32spl.dllFilesize
831KB
MD526327b93ebcad7bf061b63894923a78f
SHA14fc07b0cf4a9a54e5fdd71c33e329abe05b88823
SHA256258058689cef565f5ab1938e1cfed2753bbf5ef2325ad5f8501afd932d42b53e
SHA512fe0ac07985793ba1a0682ffc0375e07782b63588458d839293eeb5aa8d1cb0809f90051864f7620025bc49a67fd87720523fecaffb62ea895bec7f255a88199b
-
\Windows\System32\win32spl.dllFilesize
831KB
MD526327b93ebcad7bf061b63894923a78f
SHA14fc07b0cf4a9a54e5fdd71c33e329abe05b88823
SHA256258058689cef565f5ab1938e1cfed2753bbf5ef2325ad5f8501afd932d42b53e
SHA512fe0ac07985793ba1a0682ffc0375e07782b63588458d839293eeb5aa8d1cb0809f90051864f7620025bc49a67fd87720523fecaffb62ea895bec7f255a88199b
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memory/268-59-0x0000000000000000-mapping.dmp
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memory/432-62-0x0000000000000000-mapping.dmp
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memory/520-60-0x0000000000000000-mapping.dmp
-
memory/1232-54-0x0000000000000000-mapping.dmp
-
memory/1348-55-0x0000000000000000-mapping.dmp
-
memory/1436-61-0x0000000000000000-mapping.dmp
-
memory/1784-57-0x0000000000000000-mapping.dmp
-
memory/1888-56-0x0000000000000000-mapping.dmp
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memory/1976-58-0x0000000000000000-mapping.dmp