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Analysis
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max time kernel
33s -
max time network
45s -
platform
windows7_x64 -
resource
win7-20220812-en -
resource tags
arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system -
submitted
03/12/2022, 22:09
Static task
static1
Behavioral task
behavioral1
Sample
bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.dll
Resource
win7-20220812-en
General
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Target
bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.dll
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Size
795KB
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MD5
1bf824d555163924d680f64bbb28fb72
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SHA1
e351bbbefc42995dd8d1da85bc5d6796af36dabb
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SHA256
bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60
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SHA512
ea921b652dcbc65c1edd96fcfabf5f3c21761f72cfa30e20bb20a523138728d97b3f3db167fd082ef02bf8794935fe900fb867cbc9674125c023d6750f1a2893
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SSDEEP
12288:Fm3l+OkW+C9nIoxIb/IkGMtBVpdxFZNkQYVPcBJ1+cmRUuGOEIvuRdObhTi1jqn0:c0+DjubiaQcaEIvCdnnBcQjNgTdfq
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\{2BB2FCA8-3A62-5B50-AC95-F31AB11B0A65} regsvr32.exe -
Modifies registry class 11 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.ExpToireniset\Clsid\ = "{2BB2FCA8-3A62-5B50-AC95-F31AB11B0A65}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2BB2FCA8-3A62-5B50-AC95-F31AB11B0A65}\ProgID regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2BB2FCA8-3A62-5B50-AC95-F31AB11B0A65}\ProgID\ = "bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.ExpToireniset" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2BB2FCA8-3A62-5B50-AC95-F31AB11B0A65}\InprocServer32\ThreadingModel = "Apartment" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.ExpToireniset regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.ExpToireniset\ = "Seraisitentba" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.ExpToireniset\Clsid regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2BB2FCA8-3A62-5B50-AC95-F31AB11B0A65} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2BB2FCA8-3A62-5B50-AC95-F31AB11B0A65}\ = "Seraisitentba" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2BB2FCA8-3A62-5B50-AC95-F31AB11B0A65}\InprocServer32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{2BB2FCA8-3A62-5B50-AC95-F31AB11B0A65}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.dll" regsvr32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 1972 wrote to memory of 1360 1972 regsvr32.exe 28 PID 1972 wrote to memory of 1360 1972 regsvr32.exe 28 PID 1972 wrote to memory of 1360 1972 regsvr32.exe 28 PID 1972 wrote to memory of 1360 1972 regsvr32.exe 28 PID 1972 wrote to memory of 1360 1972 regsvr32.exe 28 PID 1972 wrote to memory of 1360 1972 regsvr32.exe 28 PID 1972 wrote to memory of 1360 1972 regsvr32.exe 28
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.dll1⤵
- Suspicious use of WriteProcessMemory
PID:1972 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\bc4c8ad423ed0a7ea07f2c00259108a1c655d11a772cc0a2c21d453fc87e2c60.dll2⤵
- Installs/modifies Browser Helper Object
- Modifies registry class
PID:1360
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