e7e50678a688b5a7bd3b76ca1e948809590ebff535881f9d245dafbfb8b3dc11 | Triage

Analysis

max time kernel
154s
max time network
165s
platform
windows10-2004_x64
resource
win10v2004-20231215-en
resource tags

arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
submitted
08/01/2024, 13:44

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General

Target

WMFDemux.dll
Size

104KB
MD5

5e06cd629712576a32fbcd8a0c62b4dd
SHA1

fd5cb2ce5e8d9010715b57b0c8a939e58697afc6
SHA256

58eb294d7fa3907dee24647aaf0a9ccc409f8f39aa9e03269cc8ea381c012feb
SHA512

09fc01869f59c1583d25d5aee6dbfcd4e3443fddcd751b3eade2447c6220263f7f83aafb174a026a0cebea904b67b9a256a02fa152f29d847c3993737642282a
SSDEEP

1536:4DjAdbvJ8f+XWJgPzgIO34eI86beCYbwtfH4Gxijh94l1vthK:4YtvJeTSPO4eLIKV94l1FhK

Score

1^/10

Malware Config

Signatures

Modifies registry class 9 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{1932C124-77DA-4151-99AA-234FEA09F463}	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{1932C124-77DA-4151-99AA-234FEA09F463}\FilterData = 02000000000060000300000000000000307069330000000000000000010000000000000000000000307479330000000088000000980000003170693308000000000000000100000000000000000000003074793300000000a8000000b80000003270693308000000000000000100000000000000000000003074793300000000c8000000b800000083eb36e44f52ce119f530020af0ba77001086d6bda9ad011a52000a0d10129c07669647300001000800000aa00389b71000000000000000000000000000000006175647300001000800000aa00389b71	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1932C124-77DA-4151-99AA-234FEA09F463}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1932C124-77DA-4151-99AA-234FEA09F463}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1932C124-77DA-4151-99AA-234FEA09F463}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\WMFDemux.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1932C124-77DA-4151-99AA-234FEA09F463}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{1932C124-77DA-4151-99AA-234FEA09F463}\ = "GDCL WMV/WMA Parser"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{1932C124-77DA-4151-99AA-234FEA09F463}\FriendlyName = "GDCL WMV/WMA Parser"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{1932C124-77DA-4151-99AA-234FEA09F463}\CLSID = "{1932C124-77DA-4151-99AA-234FEA09F463}"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4812 wrote to memory of 1520	4812	regsvr32.exe	91
PID 4812 wrote to memory of 1520	4812	regsvr32.exe	91
PID 4812 wrote to memory of 1520	4812	regsvr32.exe	91

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\WMFDemux.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4812
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\WMFDemux.dll
  2⤵
  - Modifies registry class
  PID:1520

Network

MITRE ATT&CK Matrix

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