26ac1b09a3ad625ccb25946b2e13437215f7ef80a73281104d2a1be87a17c09a

Analysis

max time kernel
149s
max time network
150s
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/AviSplitter.dll
Size

372KB
MD5

c5bfba7fd968130fec6f2fe69d61e305
SHA1

bae9dae1719b511f3d9466ce81d40c4afac46f38
SHA256

169247ac0661c73b73880258b356055f854af3ab9352e008650b9c3e5ababf51
SHA512

ddaddd1cae3a5d9812cd0210e8cf977c8822dfc647dfb4aedf03040499f01fba3da7a8080588627a76b6adf3b437a6ea44e9fb6fc9eff91ca4031301e5d65557
SSDEEP

6144:d41eLkaGyQrtlo1AubuSEYegJZXX2n00:d41TaGe1+Yr80

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 21 IoCs

Processes:

regsvr32.exe

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{9736D831-9D6C-4E72-B6E7-560EF9181001}\FriendlyName = "Avi Splitter"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{9736D831-9D6C-4E72-B6E7-560EF9181001}\FilterData = 02000000010060000200000000000000307069330000000000000000020000000000000000000000307479330000000060000000700000003174793300000000600000008000000031706933080000000000000000000000000000000000000083eb36e44f52ce119f530020af0ba77088eb36e44f52ce119f530020af0ba77000000000000000000000000000000000	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9736D831-9D6C-4E72-B6E7-560EF9181001}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9736D831-9D6C-4E72-B6E7-560EF9181001}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9736D831-9D6C-4E72-B6E7-560EF9181001}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\AviSplitter.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9736D831-9D6C-4E72-B6E7-560EF9181001}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\Filters\\AviSplitter.dll"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}\FilterData = 02000000010060000000000000000000	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{9736D831-9D6C-4E72-B6E7-560EF9181001}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{9736D831-9D6C-4E72-B6E7-560EF9181001}\CLSID = "{9736D831-9D6C-4E72-B6E7-560EF9181001}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}\FriendlyName = "Avi Source"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}\CLSID = "{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Media Type\{E436EB83-524F-11CE-9F53-0020AF0BA770}\{E436EB88-524F-11CE-9F53-0020AF0BA770}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}\ = "Avi Source"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Media Type	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9736D831-9D6C-4E72-B6E7-560EF9181001}\ = "Avi Splitter"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{CEA8DEFF-0AF7-4DB9-9A38-FB3C3AEFC0DE}	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

Processes:

regsvr32.exe

description	pid	Process	procid_target
PID 4536 wrote to memory of 1396	4536	regsvr32.exe	85
PID 4536 wrote to memory of 1396	4536	regsvr32.exe	85
PID 4536 wrote to memory of 1396	4536	regsvr32.exe	85

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\Filters\AviSplitter.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4536
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\Filters\AviSplitter.dll
  2⤵
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  PID:1396

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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