0bb6eadf8a17bd99c76b17265bf6107001a23af1554835bb4e63d5aa352b64b4

Analysis

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

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General

Target

打印共享修复Fix/LTSC/Fix_PrintSpooler.bat
Size

1KB
MD5

b4bcdad4dae1d57e6e38f81deb446e6e
SHA1

40509574224f0610c65e127cfc19f1664136d905
SHA256

7a7c4645e761205829d8c5490472b6d9371618ad5632ed96da29785496a0ee82
SHA512

696392c468fe0a0e9d168946c154eff1f08df839cd35fe27102b80eb66bd8f95d9c9f9375fd35372c154628e1a5dcd132d5c6a6842af7eaf501d51c61d34485c

Score

8^/10

discovery exploit persistence

Malware Config

Signatures

Possible privilege escalation attempt 3 IoCs
exploit

Processes:

icacls.exetakeown.exeicacls.exe

pid process

544 icacls.exe
952 takeown.exe
1888 icacls.exe

pid	process
544	icacls.exe
952	takeown.exe
1888	icacls.exe

Registers new Print Monitor 2 TTPs 5 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

Modify Registry

T1112

Processes:

spoolsv.exe

description	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.exe

pid process

1768 spoolsv.exe
Modifies file permissions 1 TTPs 3 IoCs
discovery

File Permissions Modification
T1222

Processes:

icacls.exeicacls.exetakeown.exe

pid process

1888 icacls.exe
544 icacls.exe
952 takeown.exe
Drops file in System32 directory 2 IoCs

Processes:

cmd.exe

description 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
evasion

Processes:

timeout.exe

pid process

968 timeout.exe

pid	process
1768	spoolsv.exe

pid	process
1888	icacls.exe
544	icacls.exe
952	takeown.exe

description	ioc	process
File created	C:\Windows\System32\win32spl.dll	cmd.exe
File opened for modification	C:\Windows\System32\win32spl.dll	cmd.exe

pid	process
968	timeout.exe

Modifies data under HKEY_USERS 14 IoCs

Processes:

spoolsv.exe

description	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

Suspicious use of AdjustPrivilegeToken 8 IoCs

Processes:

takeown.exespoolsv.exe

description	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.exe

description	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

C:\Windows\system32\cmd.exe
cmd /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
PID:1688

C:\Windows\system32\net.exe
net stop spooler
2⤵
- Suspicious use of WriteProcessMemory
PID:1360

C:\Windows\system32\net1.exe
C:\Windows\system32\net1 stop spooler
3⤵
PID:1112

C:\Windows\system32\timeout.exe
timeout /t 3 /nobreak
2⤵
- Delays execution with timeout.exe
PID:968

C:\Windows\system32\takeown.exe
Takeown /A /F C:\Windows\System32\win32spl.dll
2⤵
- Possible privilege escalation attempt
- Modifies file permissions
- Suspicious use of AdjustPrivilegeToken
PID:952

C:\Windows\system32\icacls.exe
icacls "C:\Windows\System32\win32spl.dll" /grant "administrators":F
2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:1888

C:\Windows\system32\icacls.exe
icacls "C:\Windows\System32\win32spl.dll" /grant SYSTEM:F
2⤵
- Possible privilege escalation attempt
- Modifies file permissions
PID:544

C:\Windows\system32\reg.exe
reg add "HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Print" /v RpcAuthnLevelPrivacyEnabled /t REG_DWORD /d 0 /f
2⤵
PID:612

C:\Windows\system32\net.exe
net start spooler
2⤵
- Suspicious use of WriteProcessMemory
PID:268

C:\Windows\system32\net1.exe
C:\Windows\system32\net1 start spooler
3⤵
PID:584

C:\Windows\System32\rundll32.exe
C:\Windows\System32\rundll32.exe shell32.dll,SHCreateLocalServerRunDll {995C996E-D918-4a8c-A302-45719A6F4EA7} -Embedding
1⤵
PID:860

C:\Windows\System32\spoolsv.exe
C:\Windows\System32\spoolsv.exe
1⤵
- Registers new Print Monitor
- Loads dropped DLL
- Modifies data under HKEY_USERS
- Suspicious use of AdjustPrivilegeToken
PID:1768

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

Persistence

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

File Permissions Modification

T1222

Credential Access

Discovery

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

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Downloads

C:\Windows\System32\win32spl.dll
Filesize
828KB

MD5
937dddf8be82ae84d207b7dea83ec6fd

SHA1
df86817c4a95283fe19d3be966cbc37282b5cbdc

SHA256
40bc894b387c867e8264bf9a3d3910cd1693fc1c8cb557f1a460607bf67d53d0

SHA512
0c5641f3e3d6cac2bfd12a258d45d4270d43a5b89ca50ffb2a414a1b3aa24ae0d0319f21ed90776cd2d00fac59c29b80ba0fb5372c585df99805bdca04f1c4b8

Download Submit
\Windows\System32\win32spl.dll
Filesize
828KB

MD5
937dddf8be82ae84d207b7dea83ec6fd

SHA1
df86817c4a95283fe19d3be966cbc37282b5cbdc

SHA256
40bc894b387c867e8264bf9a3d3910cd1693fc1c8cb557f1a460607bf67d53d0

SHA512
0c5641f3e3d6cac2bfd12a258d45d4270d43a5b89ca50ffb2a414a1b3aa24ae0d0319f21ed90776cd2d00fac59c29b80ba0fb5372c585df99805bdca04f1c4b8

Download Submit
memory/268-61-0x0000000000000000-mapping.dmp

Download
memory/544-59-0x0000000000000000-mapping.dmp

Download
memory/584-62-0x0000000000000000-mapping.dmp

Download
memory/612-60-0x0000000000000000-mapping.dmp

Download
memory/952-57-0x0000000000000000-mapping.dmp

Download
memory/968-56-0x0000000000000000-mapping.dmp

Download
memory/1112-55-0x0000000000000000-mapping.dmp

Download
memory/1360-54-0x0000000000000000-mapping.dmp

Download
memory/1888-58-0x0000000000000000-mapping.dmp

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Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix ATT&CK v6

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Downloads