Analysis
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max time kernel
117s -
max time network
124s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
21-03-2024 19:20
Behavioral task
behavioral1
Sample
dc69e797d7bc24e9d853072bcd44a078.dll
Resource
win7-20240221-en
4 signatures
150 seconds
General
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Target
dc69e797d7bc24e9d853072bcd44a078.dll
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Size
597KB
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MD5
dc69e797d7bc24e9d853072bcd44a078
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SHA1
3bdbd3be0fc8e1fe7310fbadbd6d85b13377c0c6
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SHA256
1776b7ca316d92112ac3791d4e90e03b69aded2ae98991000d4c6394452388bd
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SHA512
704abbdd99861e43a0a9db0a9fb7240e576d45e9bd72df58382a152e6ba3d826076c2aebd79dc813c4180aa79eb7b02ddfcbaf58fcb239fa4e39dc7106223ace
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SSDEEP
12288:1xTkREgBfnm3ooIb/5mHwV0kd23NZC1k8mPI8S888888888888W888888888884F:1xT8nmYoy5KhC1k8mzNMYGW1HGUeYNuE
Score
6/10
Malware Config
Signatures
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Installs/modifies Browser Helper Object 2 TTPs 1 IoCs
BHOs are DLL modules which act as plugins for Internet Explorer.
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B} regsvr32.exe -
Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs
Bootkits write to the MBR to gain persistence at a level below the operating system.
description ioc Process File opened for modification \??\PhysicalDrive0 regsvr32.exe -
Modifies registry class 14 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dc69e797d7bc24e9d853072bcd44a078.AAAAA\Clsid\ = "{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\.key regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ = "CCCCCCC" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32\ThreadingModel = "Apartment" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\.key\ = "regfile" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dc69e797d7bc24e9d853072bcd44a078.AAAAA regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\dc69e797d7bc24e9d853072bcd44a078.AAAAA\ = "CCCCCCC" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\dc69e797d7bc24e9d853072bcd44a078.AAAAA\Clsid regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ProgID\ = "dc69e797d7bc24e9d853072bcd44a078.AAAAA" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\dc69e797d7bc24e9d853072bcd44a078.dll" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{7AFD00B9-30B5-43A5-B3D6-E42849B6016B}\ProgID regsvr32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 2300 wrote to memory of 2212 2300 regsvr32.exe 28 PID 2300 wrote to memory of 2212 2300 regsvr32.exe 28 PID 2300 wrote to memory of 2212 2300 regsvr32.exe 28 PID 2300 wrote to memory of 2212 2300 regsvr32.exe 28 PID 2300 wrote to memory of 2212 2300 regsvr32.exe 28 PID 2300 wrote to memory of 2212 2300 regsvr32.exe 28 PID 2300 wrote to memory of 2212 2300 regsvr32.exe 28
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\dc69e797d7bc24e9d853072bcd44a078.dll1⤵
- Suspicious use of WriteProcessMemory
PID:2300 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\dc69e797d7bc24e9d853072bcd44a078.dll2⤵
- Installs/modifies Browser Helper Object
- Writes to the Master Boot Record (MBR)
- Modifies registry class
PID:2212
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