a2c9e4f09745da32b05cb9dec107f05c84b0772164cb91ccaa09bce68cfef606

Analysis

max time kernel
129s
max time network
173s
platform
windows10-2004_x64
resource
win10v2004-20220310-en
submitted
17-03-2022 01:27

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General

Target

vp8decoder.dll
Size

380KB
MD5

1ea62293ac757a0c2b64e632f30db636
SHA1

8c8ac6f8f28f432a514c3a43ea50c90daf66bfba
SHA256

970cb3e00fa68daec266cd0aa6149d3604cb696853772f20ad67555a2114d5df
SHA512

857872a260cd590bd533b5d72e6e830bb0e4e037cb6749bb7d6e1239297f21606cdbe4a0fb1492cdead6f46c88dd9eb6fab5c6e17029f7df5231cefc21fa35ab

Score

1^/10

Malware Config

Signatures

Modifies registry class 35 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\CLSID\ = "{ED3110F3-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\CLSID = "{ED3110F3-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\ = "VP8 Decoder Filter Type Library"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\HELPDIR	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\CurVer\ = "Webm.VP8Decoder.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\VersionIndependentProgID\ = "Webm.VP8Decoder"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\ = "WebM VP8 Decoder Filter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F3-5211-11DF-94AF-0026B977EEAA}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder.1\ = "WebM VP8 Decoder Filter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\ = "WebM VP8 Decoder Filter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder.1	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\vp8decoder.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder.1\CLSID\ = "{ED3110F3-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\FriendlyName = "WebM VP8 Decoder Filter"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\vp8decoder.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\InprocServer32	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\FilterData = 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	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{ED3110F1-5211-11DF-94AF-0026B977EEAA}\1.0\0\win32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\ProgID\ = "Webm.VP8Decoder.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F3-5211-11DF-94AF-0026B977EEAA}\TypeLib\ = "{ED3110F1-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.VP8Decoder\CurVer	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 2320 wrote to memory of 672	2320	regsvr32.exe	82
PID 2320 wrote to memory of 672	2320	regsvr32.exe	82
PID 2320 wrote to memory of 672	2320	regsvr32.exe	82

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\vp8decoder.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2320
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\vp8decoder.dll
  2⤵
  - Modifies registry class
  PID:672

Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix

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