26ac1b09a3ad625ccb25946b2e13437215f7ef80a73281104d2a1be87a17c09a

Analysis

max time kernel
136s
max time network
148s
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/ac3filter.dll
Size

512KB
MD5

9f4a24f056477de28d06c4472e365fbb
SHA1

8fcda87a3ca889657b5d99873c6be65e735f8e5b
SHA256

29b30bc326b3a0d10434905eba5a521fb7f9b6741d6649a4e6ba6ad21b93df49
SHA512

4f47dca5a654af3f4787806969b88182a5b3cd29dfb0a4e85acf57a6ab33f869aefb808c7d43b27fca42d70468e58c3fc2d4afc49ab8345d26225db13b4ab494
SSDEEP

6144:3Y4UlGAqgN/BQI+uU8+F0f6v73ezLa/uNDwyyziS9g:38Qyn+uUPM6qzO/ewI

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 34 IoCs

Processes:

regsvr32.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{363F46BE-27B4-4C8D-99E7-B1E049B84376}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\ac3filter.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{02AFA80F-4BEE-41FD-8572-214B58A9EF90}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\ac3filter.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{02AFA80F-4BEE-41FD-8572-214B58A9EF90}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F0B801B1-A239-473B-B6B4-6AE3DB3ABBD3}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{02AFA80F-4BEE-41FD-8572-214B58A9EF90}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{363F46BE-27B4-4C8D-99E7-B1E049B84376}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{90A9B7D2-3794-45EA-9E23-140E3938D2D9}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\ac3filter.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{A753A1EC-973E-4718-AF8E-A3F554D45C44}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FBA5FB05-58C3-45CB-8B0D-C2313EA048CF}\ = "AC3Filter Main page"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FBA5FB05-58C3-45CB-8B0D-C2313EA048CF}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\ac3filter.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F0B801B1-A239-473B-B6B4-6AE3DB3ABBD3}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\ac3filter.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FBA5FB05-58C3-45CB-8B0D-C2313EA048CF}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F0B801B1-A239-473B-B6B4-6AE3DB3ABBD3}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{02AFA80F-4BEE-41FD-8572-214B58A9EF90}\ = "AC3Filter Gains page"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{363F46BE-27B4-4C8D-99E7-B1E049B84376}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A753A1EC-973E-4718-AF8E-A3F554D45C44}\ = "AC3Filter"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F0B801B1-A239-473B-B6B4-6AE3DB3ABBD3}\ = "AC3Filter Mixer page"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{02AFA80F-4BEE-41FD-8572-214B58A9EF90}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{363F46BE-27B4-4C8D-99E7-B1E049B84376}\ = "AC3Filter System page"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{A753A1EC-973E-4718-AF8E-A3F554D45C44}\FilterData = 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	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{A753A1EC-973E-4718-AF8E-A3F554D45C44}\FriendlyName = "AC3Filter"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{A753A1EC-973E-4718-AF8E-A3F554D45C44}\CLSID = "{A753A1EC-973E-4718-AF8E-A3F554D45C44}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{90A9B7D2-3794-45EA-9E23-140E3938D2D9}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{90A9B7D2-3794-45EA-9E23-140E3938D2D9}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{363F46BE-27B4-4C8D-99E7-B1E049B84376}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{90A9B7D2-3794-45EA-9E23-140E3938D2D9}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A753A1EC-973E-4718-AF8E-A3F554D45C44}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A753A1EC-973E-4718-AF8E-A3F554D45C44}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\ac3filter.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FBA5FB05-58C3-45CB-8B0D-C2313EA048CF}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F0B801B1-A239-473B-B6B4-6AE3DB3ABBD3}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A753A1EC-973E-4718-AF8E-A3F554D45C44}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{A753A1EC-973E-4718-AF8E-A3F554D45C44}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{FBA5FB05-58C3-45CB-8B0D-C2313EA048CF}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{90A9B7D2-3794-45EA-9E23-140E3938D2D9}\ = "AC3Filter About page"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

regsvr32.exe

description	pid	Process	procid_target
PID 4200 wrote to memory of 4636	4200	regsvr32.exe	85
PID 4200 wrote to memory of 4636	4200	regsvr32.exe	85
PID 4200 wrote to memory of 4636	4200	regsvr32.exe	85

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\Filters\ac3filter.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4200
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\Filters\ac3filter.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:4636

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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