Overview
overview
8Static
static
打印共�...er.bat
windows7-x64
8打印共�...er.bat
windows10-2004-x64
8打印共�...pl.dll
windows7-x64
1打印共�...pl.dll
windows10-2004-x64
1打印共�...er.bat
windows7-x64
8打印共�...er.bat
windows10-2004-x64
8打印共�...pl.dll
windows7-x64
1打印共�...pl.dll
windows10-2004-x64
1打印共�...er.bat
windows7-x64
8打印共�...er.bat
windows10-2004-x64
8打印共�...pl.dll
windows7-x64
8打印共�...pl.dll
windows10-2004-x64
8Analysis
-
max time kernel
130s -
max time network
47s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
30-10-2022 13:58
Static task
static1
Behavioral task
behavioral1
Sample
打印共享修复Fix/Fix_PrintSpooler/Fix_PrintSpooler.bat
Resource
win7-20220812-en
Behavioral task
behavioral2
Sample
打印共享修复Fix/Fix_PrintSpooler/Fix_PrintSpooler.bat
Resource
win10v2004-20220812-en
Behavioral task
behavioral3
Sample
打印共享修复Fix/Fix_PrintSpooler/win32spl.dll
Resource
win7-20220812-en
Behavioral task
behavioral4
Sample
打印共享修复Fix/Fix_PrintSpooler/win32spl.dll
Resource
win10v2004-20220812-en
Behavioral task
behavioral5
Sample
打印共享修复Fix/LTSC/Fix_PrintSpooler.bat
Resource
win7-20220812-en
Behavioral task
behavioral6
Sample
打印共享修复Fix/LTSC/Fix_PrintSpooler.bat
Resource
win10v2004-20220812-en
Behavioral task
behavioral7
Sample
打印共享修复Fix/LTSC/win32spl.dll
Resource
win7-20220812-en
Behavioral task
behavioral8
Sample
打印共享修复Fix/LTSC/win32spl.dll
Resource
win10v2004-20220812-en
Behavioral task
behavioral9
Sample
打印共享修复Fix/Win7_X64/Fix_PrintSpooler.bat
Resource
win7-20220812-en
Behavioral task
behavioral10
Sample
打印共享修复Fix/Win7_X64/Fix_PrintSpooler.bat
Resource
win10v2004-20220901-en
Behavioral task
behavioral11
Sample
打印共享修复Fix/Win7_X64/win32spl.dll
Resource
win7-20220901-en
Behavioral task
behavioral12
Sample
打印共享修复Fix/Win7_X64/win32spl.dll
Resource
win10v2004-20220901-en
General
-
Target
打印共享修复Fix/LTSC/Fix_PrintSpooler.bat
-
Size
1KB
-
MD5
b4bcdad4dae1d57e6e38f81deb446e6e
-
SHA1
40509574224f0610c65e127cfc19f1664136d905
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SHA256
7a7c4645e761205829d8c5490472b6d9371618ad5632ed96da29785496a0ee82
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SHA512
696392c468fe0a0e9d168946c154eff1f08df839cd35fe27102b80eb66bd8f95d9c9f9375fd35372c154628e1a5dcd132d5c6a6842af7eaf501d51c61d34485c
Malware Config
Signatures
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Possible privilege escalation attempt 3 IoCs
Processes:
icacls.exetakeown.exeicacls.exepid process 544 icacls.exe 952 takeown.exe 1888 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 1768 spoolsv.exe -
Modifies file permissions 1 TTPs 3 IoCs
Processes:
icacls.exeicacls.exetakeown.exepid process 1888 icacls.exe 544 icacls.exe 952 takeown.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 968 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\Devices spoolsv.exe 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\Devices\Microsoft XPS Document Writer = "winspool,Ne00:" 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\PrinterPorts\Fax = "winspool,Ne01:,15,45" 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 Key created \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows NT\CurrentVersion\Devices 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 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 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,Ne01:" spoolsv.exe Set value (str) \REGISTRY\USER\S-1-5-20\Software\Microsoft\Windows NT\CurrentVersion\PrinterPorts\Fax = "winspool,Ne01:,15,45" spoolsv.exe -
Runs net.exe
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Suspicious use of AdjustPrivilegeToken 8 IoCs
Processes:
takeown.exespoolsv.exedescription pid process Token: SeTakeOwnershipPrivilege 952 takeown.exe Token: SeRestorePrivilege 1768 spoolsv.exe Token: SeRestorePrivilege 1768 spoolsv.exe Token: SeRestorePrivilege 1768 spoolsv.exe Token: SeRestorePrivilege 1768 spoolsv.exe Token: SeRestorePrivilege 1768 spoolsv.exe Token: SeRestorePrivilege 1768 spoolsv.exe Token: SeRestorePrivilege 1768 spoolsv.exe -
Suspicious use of WriteProcessMemory 27 IoCs
Processes:
cmd.exenet.exenet.exedescription pid process target process PID 1688 wrote to memory of 1360 1688 cmd.exe net.exe PID 1688 wrote to memory of 1360 1688 cmd.exe net.exe PID 1688 wrote to memory of 1360 1688 cmd.exe net.exe PID 1360 wrote to memory of 1112 1360 net.exe net1.exe PID 1360 wrote to memory of 1112 1360 net.exe net1.exe PID 1360 wrote to memory of 1112 1360 net.exe net1.exe PID 1688 wrote to memory of 968 1688 cmd.exe timeout.exe PID 1688 wrote to memory of 968 1688 cmd.exe timeout.exe PID 1688 wrote to memory of 968 1688 cmd.exe timeout.exe PID 1688 wrote to memory of 952 1688 cmd.exe takeown.exe PID 1688 wrote to memory of 952 1688 cmd.exe takeown.exe PID 1688 wrote to memory of 952 1688 cmd.exe takeown.exe PID 1688 wrote to memory of 1888 1688 cmd.exe icacls.exe PID 1688 wrote to memory of 1888 1688 cmd.exe icacls.exe PID 1688 wrote to memory of 1888 1688 cmd.exe icacls.exe PID 1688 wrote to memory of 544 1688 cmd.exe icacls.exe PID 1688 wrote to memory of 544 1688 cmd.exe icacls.exe PID 1688 wrote to memory of 544 1688 cmd.exe icacls.exe PID 1688 wrote to memory of 612 1688 cmd.exe reg.exe PID 1688 wrote to memory of 612 1688 cmd.exe reg.exe PID 1688 wrote to memory of 612 1688 cmd.exe reg.exe PID 1688 wrote to memory of 268 1688 cmd.exe net.exe PID 1688 wrote to memory of 268 1688 cmd.exe net.exe PID 1688 wrote to memory of 268 1688 cmd.exe net.exe PID 268 wrote to memory of 584 268 net.exe net1.exe PID 268 wrote to memory of 584 268 net.exe net1.exe PID 268 wrote to memory of 584 268 net.exe net1.exe
Processes
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C:\Windows\system32\cmd.execmd /c "C:\Users\Admin\AppData\Local\Temp\打印共享修复Fix\LTSC\Fix_PrintSpooler.bat"1⤵
- Drops file in System32 directory
- Suspicious use of WriteProcessMemory
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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
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C:\Windows\system32\icacls.exeicacls "C:\Windows\System32\win32spl.dll" /grant "administrators":F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
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C:\Windows\system32\icacls.exeicacls "C:\Windows\System32\win32spl.dll" /grant SYSTEM:F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
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C:\Windows\system32\reg.exereg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print" /v RpcAuthnLevelPrivacyEnabled /t REG_DWORD /d 0 /f2⤵
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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
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C:\Windows\System32\win32spl.dllFilesize
828KB
MD5937dddf8be82ae84d207b7dea83ec6fd
SHA1df86817c4a95283fe19d3be966cbc37282b5cbdc
SHA25640bc894b387c867e8264bf9a3d3910cd1693fc1c8cb557f1a460607bf67d53d0
SHA5120c5641f3e3d6cac2bfd12a258d45d4270d43a5b89ca50ffb2a414a1b3aa24ae0d0319f21ed90776cd2d00fac59c29b80ba0fb5372c585df99805bdca04f1c4b8
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\Windows\System32\win32spl.dllFilesize
828KB
MD5937dddf8be82ae84d207b7dea83ec6fd
SHA1df86817c4a95283fe19d3be966cbc37282b5cbdc
SHA25640bc894b387c867e8264bf9a3d3910cd1693fc1c8cb557f1a460607bf67d53d0
SHA5120c5641f3e3d6cac2bfd12a258d45d4270d43a5b89ca50ffb2a414a1b3aa24ae0d0319f21ed90776cd2d00fac59c29b80ba0fb5372c585df99805bdca04f1c4b8
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memory/268-61-0x0000000000000000-mapping.dmp
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memory/544-59-0x0000000000000000-mapping.dmp
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memory/584-62-0x0000000000000000-mapping.dmp
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memory/612-60-0x0000000000000000-mapping.dmp
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memory/952-57-0x0000000000000000-mapping.dmp
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memory/968-56-0x0000000000000000-mapping.dmp
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memory/1112-55-0x0000000000000000-mapping.dmp
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memory/1360-54-0x0000000000000000-mapping.dmp
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memory/1888-58-0x0000000000000000-mapping.dmp