e315b6c1144c05f8031cc752ec6fe84864f004e995476b6354abe5a805544347

Analysis

max time kernel
144s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
26-01-2024 00:28

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General

Target

Codecs/RealMediaSplitter.dll
Size

360KB
MD5

3c262235c90b600be5ff457bc9c8cccb
SHA1

7ebd941bd26c8f7b64c3784602ef1a49c9ced8cc
SHA256

d10e22a9198fc6d35ccd19512b03c00614300a13f7deb2e2abf383fc61075235
SHA512

cff32ad228eb672c8048486992dcd0f7a30b9b1f237a054e4d5287e49298480c780295d5f41325b86e95b368a679567ab6e2dbb5d03c04f2ef69ac65b10b4eff
SSDEEP

6144:UVsEJrHRGjDxIK1Rc2eC4F0W7EzJffReXPOw8MFkndG0yXGUweH:KNJkjDuKv2z0LzJf5efOw7udG0Ub

Score

1^/10

Malware Config

Signatures

Modifies registry class 39 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{765035B3-5944-4A94-806B-20EE3415F26F}\FriendlyName = "RealMedia Source"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{941A4793-A705-4312-8DFC-C11CA05F397E}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Codecs\\RealMediaSplitter.dll"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{E21BE468-5C18-43EB-B0CC-DB93A847D769}\FilterData = 020000000000600002000000000000003070693300000000000000000100000000000000000000003074793300000000500000006000000031706933080000000000000000000000000000000000000083eb36e44f52ce119f530020af0ba77000000000000000000000000000000000	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{941A4793-A705-4312-8DFC-C11CA05F397E}\CLSID = "{941A4793-A705-4312-8DFC-C11CA05F397E}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{238D0F23-5DC9-45A6-9BE2-666160C324DD}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{941A4793-A705-4312-8DFC-C11CA05F397E}\FriendlyName = "RealAudio Decoder"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{765035B3-5944-4A94-806B-20EE3415F26F}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{238D0F23-5DC9-45A6-9BE2-666160C324DD}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Codecs\\RealMediaSplitter.dll"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{238D0F23-5DC9-45A6-9BE2-666160C324DD}\FilterData = 02000000000060000200000000000000307069330000000000000000040000000000000000000000307479330000000090000000a0000000317479330000000090000000b0000000327479330000000090000000c0000000337479330000000090000000d0000000317069330800000000000000010000000000000000000000307479330000000090000000e00000007669647300001000800000aa00389b715256323000001000800000aa00389b715256333000001000800000aa00389b715256343000001000800000aa00389b715256343100001000800000aa00389b7100000000000000000000000000000000	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{57428EC6-C2B2-44A2-AA9C-28F0B6A5C48E}\Source Filter = "{E436EBB5-524F-11CE-9F53-0020AF0BA770}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E21BE468-5C18-43EB-B0CC-DB93A847D769}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{941A4793-A705-4312-8DFC-C11CA05F397E}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{941A4793-A705-4312-8DFC-C11CA05F397E}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{E21BE468-5C18-43EB-B0CC-DB93A847D769}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{238D0F23-5DC9-45A6-9BE2-666160C324DD}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{238D0F23-5DC9-45A6-9BE2-666160C324DD}\CLSID = "{238D0F23-5DC9-45A6-9BE2-666160C324DD}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E21BE468-5C18-43EB-B0CC-DB93A847D769}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Codecs\\RealMediaSplitter.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{765035B3-5944-4A94-806B-20EE3415F26F}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Codecs\\RealMediaSplitter.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{765035B3-5944-4A94-806B-20EE3415F26F}\ = "RealMedia Source"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{238D0F23-5DC9-45A6-9BE2-666160C324DD}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{941A4793-A705-4312-8DFC-C11CA05F397E}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E21BE468-5C18-43EB-B0CC-DB93A847D769}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{765035B3-5944-4A94-806B-20EE3415F26F}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{765035B3-5944-4A94-806B-20EE3415F26F}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{E21BE468-5C18-43EB-B0CC-DB93A847D769}\FriendlyName = "RealMedia Splitter"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{E21BE468-5C18-43EB-B0CC-DB93A847D769}\CLSID = "{E21BE468-5C18-43EB-B0CC-DB93A847D769}"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{941A4793-A705-4312-8DFC-C11CA05F397E}\FilterData = 020000000000600002000000000000003070693300000000000000000900000000000000000000003074793300000000e0000000f00000003174793300000000e0000000000100003274793300000000e0000000100100003374793300000000e0000000200100003474793300000000e0000000300100003574793300000000e0000000400100003674793300000000e0000000500100003774793300000000e0000000600100003874793300000000e0000000700100003170693308000000000000000100000000000000000000003074793300000000e0000000800100006175647300001000800000aa00389b7131345f3400001000800000aa00389b7132385f3800001000800000aa00389b714154524300001000800000aa00389b71434f4f4b00001000800000aa00389b71444e455400001000800000aa00389b715349505200001000800000aa00389b71ff00000000001000800000aa00389b715241414300001000800000aa00389b715241435000001000800000aa00389b710100000000001000800000aa00389b71	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{57428EC6-C2B2-44A2-AA9C-28F0B6A5C48E}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E21BE468-5C18-43EB-B0CC-DB93A847D769}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{765035B3-5944-4A94-806B-20EE3415F26F}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{765035B3-5944-4A94-806B-20EE3415F26F}\CLSID = "{765035B3-5944-4A94-806B-20EE3415F26F}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{941A4793-A705-4312-8DFC-C11CA05F397E}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{238D0F23-5DC9-45A6-9BE2-666160C324DD}\ = "RealVideo Decoder"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{941A4793-A705-4312-8DFC-C11CA05F397E}\ = "RealAudio Decoder"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{238D0F23-5DC9-45A6-9BE2-666160C324DD}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{765035B3-5944-4A94-806B-20EE3415F26F}\FilterData = 02000000000060000000000000000000	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{238D0F23-5DC9-45A6-9BE2-666160C324DD}\FriendlyName = "RealVideo Decoder"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{57428EC6-C2B2-44A2-AA9C-28F0B6A5C48E}\0 = "0,4,,2E524D46"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{E21BE468-5C18-43EB-B0CC-DB93A847D769}\ = "RealMedia Splitter"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2672 wrote to memory of 4976	2672	regsvr32.exe	86
PID 2672 wrote to memory of 4976	2672	regsvr32.exe	86
PID 2672 wrote to memory of 4976	2672	regsvr32.exe	86

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\Codecs\RealMediaSplitter.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2672
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\Codecs\RealMediaSplitter.dll
  2⤵
  - Modifies registry class
  PID:4976

Analysis

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Malware Config

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