Analysis
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max time kernel
120s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
04/03/2024, 21:59
Behavioral task
behavioral1
Sample
b33446ab217e39a2c54302f5aac1cc50.dll
Resource
win7-20240221-en
3 signatures
150 seconds
Behavioral task
behavioral2
Sample
b33446ab217e39a2c54302f5aac1cc50.dll
Resource
win10v2004-20240226-en
3 signatures
150 seconds
General
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Target
b33446ab217e39a2c54302f5aac1cc50.dll
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Size
68KB
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MD5
b33446ab217e39a2c54302f5aac1cc50
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SHA1
7542fba7a8e516f595b6758b87b9c7ca49f333d8
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SHA256
d87dab6eafabb7ebdf23ef31ebb07be6769c1d052f97f09afaefce5792fd8a38
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SHA512
e535f9831315d5ea3b09951f6f7a30ca142cc69e0b5188688edbe84d4fc619229bb548536ec384b19f90a6c338eef80081ff71b9965185d3182eb4d4d584024f
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SSDEEP
1536:9cmgeI6A8fk1l4D1aDG/8aP5rY2H8uI0WvU17iX14VzVzQ425MZ:9cm7IF8fKHD88aP5xH8XvU7iWVBcBa
Score
6/10
Malware Config
Signatures
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Modifies WinLogon 2 TTPs 7 IoCs
description ioc Process Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS rundll32.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS\Asynchronous = "1" rundll32.exe Set value (int) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS\Impersonate = "0" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS\DllName = "C:\\Windows\\System32\\Sysi.dll" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows NT\CurrentVersion\Winlogon\Notify\BITS\Startup = "ServiceMain" rundll32.exe -
Drops file in System32 directory 3 IoCs
description ioc Process File created C:\Windows\SysWOW64\Sysi.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\Sysi.dll rundll32.exe File created C:\Windows\SysWOW64\Sysi0.dll rundll32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1048 wrote to memory of 3052 1048 rundll32.exe 28 PID 1048 wrote to memory of 3052 1048 rundll32.exe 28 PID 1048 wrote to memory of 3052 1048 rundll32.exe 28 PID 1048 wrote to memory of 3052 1048 rundll32.exe 28 PID 1048 wrote to memory of 3052 1048 rundll32.exe 28 PID 1048 wrote to memory of 3052 1048 rundll32.exe 28 PID 1048 wrote to memory of 3052 1048 rundll32.exe 28
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\b33446ab217e39a2c54302f5aac1cc50.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:1048 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\b33446ab217e39a2c54302f5aac1cc50.dll,#12⤵
- Modifies WinLogon
- Drops file in System32 directory
PID:3052
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