c231a387fdcae2650f939e4dd4cc41a11b14908f7cb5e91eb3de818d33660293

Analysis

max time kernel
148s
max time network
152s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
07-01-2025 14:57

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General

Target

webmmux.dll
Size

259KB
MD5

49c51ace274d7db13caa533880869a4a
SHA1

b539ed2f1a15e2d4e5c933611d736e0c317b8313
SHA256

1d6407d7c7ffd2642ea7f97c86100514e8e44f58ff522475cb42bcc43a1b172b
SHA512

13440009e2f63078dce466bf2fe54c60feb6cedeed6e9e6fc592189c50b0780543c936786b7051311089f39e9e3ccb67f705c54781c4cae6d3a8007998befbf6
SSDEEP

3072:MW218gr7s2yIHB0pTPdTX9zUbEbStE97zjAs1RtTcJTfIv0se7POWu/HgsGU1VTl:MWSfr7sXSmPDbKPJ6/AsNk+1x

Score

3^/10

discovery

Malware Config

Signatures

System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	regsvr32.exe

Modifies registry class 23 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer\CurVer\ = "Webm.Muxer.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\CLSID = "{ED3110F0-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\ = "WebM Muxer Filter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\VersionIndependentProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\VersionIndependentProgID\ = "Webm.Muxer"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer\CLSID\ = "{ED3110F0-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer.1\ = "WebM Muxer Filter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F0-5211-11DF-94AF-0026B977EEAA}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\FriendlyName = "WebM Muxer Filter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\ProgID\ = "Webm.Muxer.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\webmmux.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer\CurVer	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer.1\CLSID\ = "{ED3110F0-5211-11DF-94AF-0026B977EEAA}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer\ = "WebM Muxer Filter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer.1\CLSID	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\FilterData = 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	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F0-5211-11DF-94AF-0026B977EEAA}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{ED3110F0-5211-11DF-94AF-0026B977EEAA}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Webm.Muxer.1	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 8 wrote to memory of 1832	8	regsvr32.exe	84
PID 8 wrote to memory of 1832	8	regsvr32.exe	84
PID 8 wrote to memory of 1832	8	regsvr32.exe	84

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\webmmux.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:8
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\webmmux.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:1832

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Privilege Escalation

Defense Evasion

Credential Access

Discovery

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v15

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