Analysis
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max time kernel
122s -
max time network
125s -
platform
windows7_x64 -
resource
win7-20240221-en -
resource tags
arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system -
submitted
04-03-2024 17:42
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
b2b910809e1bddd88407f3ecb5e58a5e.dll
Resource
win7-20240221-en
windows7-x64
4 signatures
150 seconds
General
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Target
b2b910809e1bddd88407f3ecb5e58a5e.dll
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Size
49KB
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MD5
b2b910809e1bddd88407f3ecb5e58a5e
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SHA1
b5abcbf62fef039bf93395d7e4687120d5211eb3
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SHA256
a5d832e86570145557e81d646bfbd37984c7040d3d45fe51dd5587cafb001438
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SHA512
05536d5c76067b5502fbf7b19820ddf7352813d59e57032cb2319df0e7450020ca0499dd7e23488266c06e869cc97f3d29f356719928dac10eb1aa5255c0f0cd
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SSDEEP
768:R9UOsS1nwGNvipOmgatoZPJB3mob2fCUJ+rK2sgd4jb:RzN4LgYoVJxmob2Khsnjb
Malware Config
Signatures
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Installs/modifies Browser Helper Object 2 TTPs 2 IoCs
BHOs are DLL modules which act as plugins for Internet Explorer.
Processes:
regsvr32.exedescription ioc process Key created \REGISTRY\MACHINE\Software\Wow6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{6ab7158b-4bff-4160-ad7d-4d622df548cf} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{6ab7158b-4bff-4160-ad7d-4d622df548cf}\ regsvr32.exe -
Drops file in System32 directory 2 IoCs
Processes:
regsvr32.exedescription ioc process File opened for modification C:\Windows\SysWOW64\stdole3.tlb regsvr32.exe File created C:\Windows\SysWOW64\stdole3.tlb regsvr32.exe -
Modifies registry class 5 IoCs
Processes:
regsvr32.exedescription ioc process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AB7158B-4BFF-4160-AD7D-4D622DF548CF} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AB7158B-4BFF-4160-AD7D-4D622DF548CF}\ = "Nothing" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AB7158B-4BFF-4160-AD7D-4D622DF548CF}\InprocServer32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AB7158B-4BFF-4160-AD7D-4D622DF548CF}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\b2b910809e1bddd88407f3ecb5e58a5e.dll" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AB7158B-4BFF-4160-AD7D-4D622DF548CF}\InprocServer32\ThreadingModel = "Apartment" regsvr32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
Processes:
regsvr32.exedescription pid process target process PID 2712 wrote to memory of 2620 2712 regsvr32.exe regsvr32.exe PID 2712 wrote to memory of 2620 2712 regsvr32.exe regsvr32.exe PID 2712 wrote to memory of 2620 2712 regsvr32.exe regsvr32.exe PID 2712 wrote to memory of 2620 2712 regsvr32.exe regsvr32.exe PID 2712 wrote to memory of 2620 2712 regsvr32.exe regsvr32.exe PID 2712 wrote to memory of 2620 2712 regsvr32.exe regsvr32.exe PID 2712 wrote to memory of 2620 2712 regsvr32.exe regsvr32.exe
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\b2b910809e1bddd88407f3ecb5e58a5e.dll1⤵
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\b2b910809e1bddd88407f3ecb5e58a5e.dll2⤵
- Installs/modifies Browser Helper Object
- Drops file in System32 directory
- Modifies registry class