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Analysis
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max time kernel
103s -
max time network
131s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
03/10/2022, 00:25
Behavioral task
behavioral1
Sample
f85544dc54d06caa843a8f4c7ab3047828f0023be63b6ec4b9ef402f04682be8.dll
Resource
win7-20220812-en
5 signatures
150 seconds
General
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Target
f85544dc54d06caa843a8f4c7ab3047828f0023be63b6ec4b9ef402f04682be8.dll
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Size
107KB
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MD5
4e511b54283ab37484c2d7ca46bcff50
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SHA1
a087e6b98a90b2b94f4234a668e0dbf74d01f1bd
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SHA256
f85544dc54d06caa843a8f4c7ab3047828f0023be63b6ec4b9ef402f04682be8
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SHA512
dc293a6960f52b68d39ea50ef6a35c30d64a45758febada20dff92095136c9931e22ccfbbf2442b649acbb5170624f0e1c1735e21f3d6d9232617c0ac8452616
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SSDEEP
3072:Yur+QqjIC5KdKqoDayYmAr8iaETpCzpzJtEIw1P:FKt+p8DYmW8iaET8z+Iw1
Malware Config
Signatures
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resource yara_rule behavioral2/memory/4892-134-0x0000000010000000-0x0000000010041000-memory.dmp upx -
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\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393} regsvr32.exe -
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\AdvancedOptions\BROWSE\SCRIPT_ERROR_CACHE\DefaultValue = "yes" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\AdvancedOptions\BROWSE\SCRIPT_ERROR_CACHE\UncheckedValue = "no" regsvr32.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Internet Explorer\Main\Error Dlg Displayed On Every Error = "no" regsvr32.exe Set value (str) \REGISTRY\USER\S-1-5-21-2891029575-1462575-1165213807-1000\SOFTWARE\Microsoft\Internet Explorer\New Windows\PopupMgr = "no" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Internet Explorer\AdvancedOptions\BROWSE\SCRIPT_ERROR_CACHE\CheckedValue = "yes" regsvr32.exe -
Modifies registry class 41 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\TypeLib\ = "{40195CA5-4EA4-4B10-88B3-5659A0A5310B}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}\InprocServer32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f85544dc54d06caa843a8f4c7ab3047828f0023be63b6ec4b9ef402f04682be8.dll" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B}\1.0\FLAGS regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Urlnav.Nav.1\ = "Nav Class" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Urlnav.Nav regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393} regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}\ProgID regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Urlnav.Nav.1 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Urlnav.Nav\CLSID\ = "{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}\ = "Nav Class" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\TypeLib regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\ProxyStubClsid32 regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B}\1.0\HELPDIR regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210} regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\TypeLib regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\TypeLib\Version = "1.0" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Urlnav.Nav.1\CLSID\ = "{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Urlnav.Nav\ = "Nav Class" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}\InprocServer32\ThreadingModel = "Apartment" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B}\1.0\ = "urlnav 1.0 Type Library" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\TypeLib\Version = "1.0" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}\ProgID\ = "Urlnav.Nav.1" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B} regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B}\1.0 regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B}\1.0\0 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\TypeLib\ = "{40195CA5-4EA4-4B10-88B3-5659A0A5310B}" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}\VersionIndependentProgID\ = "Urlnav.Nav" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B}\1.0\FLAGS\ = "0" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B}\1.0\0\win32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\ = "INav" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\ProxyStubClsid32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{ED2676C8-F22C-4E60-9812-E2851B2AD210}\ = "INav" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Urlnav.Nav.1\CLSID regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\Urlnav.Nav\CLSID regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9A4DDA61-1D3A-49B7-9849-DAC6CD30A393}\VersionIndependentProgID regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{40195CA5-4EA4-4B10-88B3-5659A0A5310B}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\f85544dc54d06caa843a8f4c7ab3047828f0023be63b6ec4b9ef402f04682be8.dll" regsvr32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4848 wrote to memory of 4892 4848 regsvr32.exe 81 PID 4848 wrote to memory of 4892 4848 regsvr32.exe 81 PID 4848 wrote to memory of 4892 4848 regsvr32.exe 81
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\f85544dc54d06caa843a8f4c7ab3047828f0023be63b6ec4b9ef402f04682be8.dll1⤵
- Suspicious use of WriteProcessMemory
PID:4848 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\f85544dc54d06caa843a8f4c7ab3047828f0023be63b6ec4b9ef402f04682be8.dll2⤵
- Installs/modifies Browser Helper Object
- Modifies Internet Explorer settings
- Modifies registry class
PID:4892
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