26ac1b09a3ad625ccb25946b2e13437215f7ef80a73281104d2a1be87a17c09a

Analysis

max time kernel
148s
max time network
151s
platform
windows10-2004_x64
resource
win10v2004-20241007-en
resource tags

arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
submitted
03-11-2024 00:29

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General

Target

Filters/l3codecx.dll
Size

81KB
MD5

ade9508b04f995891d37ca317ba51820
SHA1

6762e4ce349e2f2da5d5991cec28bbebe284f9db
SHA256

939ba9d2e52f1683cd722d70f87143da902788b4912e2723c9940b1ac5593ecf
SHA512

bce4f31ce1286911fd3af58a9cf1e1995812ba229c80f8a26ea5a46c0a7bf515e9bc2f5f73446ca0666400cefa4666b6f53f0c1146b99a171ef42a48b76095b0
SSDEEP

1536:HnO7U7L8+AkxhnMOejOIOAZM2nrREegqB7v9lCDLU:HiUE+hnMOejOIOAGMrRHgqN9lULU

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

Processes:

regsvr32.exe

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

Modifies registry class 24 IoCs

Processes:

regsvr32.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8DD6C641-98CB-11D1-9846-00A024CFEF6D}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\l3codecx.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3000-DBF4-11D0-860E-00A024CFEF6D}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3000-DBF4-11D0-860E-00A024CFEF6D}\ = "MPEG Layer-3 Decoder"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3001-DBF4-11D0-860E-00A024CFEF6D}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3002-DBF4-11D0-860E-00A024CFEF6D}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\l3codecx.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8DD6C641-98CB-11D1-9846-00A024CFEF6D}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8DD6C641-98CB-11D1-9846-00A024CFEF6D}\ = "MPEG Layer-3 Decoder Statistics Page"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8DD6C641-98CB-11D1-9846-00A024CFEF6D}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{8DD6C641-98CB-11D1-9846-00A024CFEF6D}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3000-DBF4-11D0-860E-00A024CFEF6D}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\l3codecx.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3001-DBF4-11D0-860E-00A024CFEF6D}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3001-DBF4-11D0-860E-00A024CFEF6D}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3001-DBF4-11D0-860E-00A024CFEF6D}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\l3codecx.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{38BE3000-DBF4-11D0-860E-00A024CFEF6D}\CLSID = "{38BE3000-DBF4-11D0-860E-00A024CFEF6D}"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{38BE3000-DBF4-11D0-860E-00A024CFEF6D}\FilterData = 0200000000008100020000000000000030706933000000000000000001000000000000000000000030747933000000006000000070000000317069330800000000000000010000000000000000000000307479330000000060000000800000006175647300001000800000aa00389b715500000000001000800000aa00389b710100000000001000800000aa00389b71	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3000-DBF4-11D0-860E-00A024CFEF6D}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3000-DBF4-11D0-860E-00A024CFEF6D}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3001-DBF4-11D0-860E-00A024CFEF6D}\ = "MPEG Layer-3 Decoder Property Page"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3002-DBF4-11D0-860E-00A024CFEF6D}\ = "MPEG Layer-3 Decoder About Page"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3002-DBF4-11D0-860E-00A024CFEF6D}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3002-DBF4-11D0-860E-00A024CFEF6D}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{38BE3000-DBF4-11D0-860E-00A024CFEF6D}\FriendlyName = "MPEG Layer-3 Decoder"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{38BE3002-DBF4-11D0-860E-00A024CFEF6D}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{38BE3000-DBF4-11D0-860E-00A024CFEF6D}	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

regsvr32.exe

description	pid	Process	procid_target
PID 2520 wrote to memory of 3732	2520	regsvr32.exe	85
PID 2520 wrote to memory of 3732	2520	regsvr32.exe	85
PID 2520 wrote to memory of 3732	2520	regsvr32.exe	85

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\Filters\l3codecx.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2520
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\Filters\l3codecx.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:3732

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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