e7e1de5c01ce0f5a7c4849e97ed38e2250dbb7bdb6859f0bd508546b2b22b091 | Triage

Analysis

max time kernel
121s
max time network
123s
platform
windows7_x64
resource
win7-20231129-en
resource tags

arch:x64arch:x86image:win7-20231129-enlocale:en-usos:windows7-x64system
submitted
18/04/2024, 00:18

Sharing

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General

Target

CoreAAC.dll
Size

592KB
MD5

6636fd123e77073c1a07d1ec0831334c
SHA1

39ea6f28d5b30675760f29df68160a81d5df349e
SHA256

e85c1802ae3c7af9b7967ceadaf0504823f092abba04ba912576edbfd421e76a
SHA512

3ac59d1ad36eb1c052c272a11c6dd78dbebb5061b8b79a2a1f0108f8208be7fb9cc8e6208124b12c779e2bdc845882cfd432a84427e2c5c312c4d3275b054849
SSDEEP

12288:8rXUXLyZqsQoK2AyPaGJuVpk+v9LybKslc9OyGs2+eD:SUX4K2kGJMpkwLyllA7l2

Score

1^/10

Malware Config

Signatures

Modifies registry class 19 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4665E44B-8B9A-4515-A086-E94ECE374608}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CoreAAC.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}\CLSID = "{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}\ = "CoreAAC Audio Decoder"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BBFC1A2A-D3A2-4610-847D-26592022F86E}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4665E44B-8B9A-4515-A086-E94ECE374608}\ = "CoreAAC Audio Decoder About"	regsvr32.exe
Set value (data)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}\FilterData = 020000000000800002000000000000003070693300000000000000000200000000000000000000003074793300000000700000008000000031747933000000007000000090000000317069330800000000000000010000000000000000000000307479330000000070000000a00000006175647300001000800000aa00389b71ff00000000001000800000aa00389b714d50344100001000800000aa00389b710100000000001000800000aa00389b71	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BBFC1A2A-D3A2-4610-847D-26592022F86E}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4665E44B-8B9A-4515-A086-E94ECE374608}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BBFC1A2A-D3A2-4610-847D-26592022F86E}\ = "CoreAAC Audio Decoder Info"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4665E44B-8B9A-4515-A086-E94ECE374608}\InprocServer32\ThreadingModel = "Both"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{4665E44B-8B9A-4515-A086-E94ECE374608}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{083863F1-70DE-11D0-BD40-00A0C911CE86}\Instance\{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}\FriendlyName = "CoreAAC Audio Decoder"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{6AC7C19E-8CA0-4E3D-9A9F-2881DE29E0AC}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CoreAAC.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BBFC1A2A-D3A2-4610-847D-26592022F86E}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{BBFC1A2A-D3A2-4610-847D-26592022F86E}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\CoreAAC.dll"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 3044 wrote to memory of 2916	3044	regsvr32.exe	28
PID 3044 wrote to memory of 2916	3044	regsvr32.exe	28
PID 3044 wrote to memory of 2916	3044	regsvr32.exe	28
PID 3044 wrote to memory of 2916	3044	regsvr32.exe	28
PID 3044 wrote to memory of 2916	3044	regsvr32.exe	28
PID 3044 wrote to memory of 2916	3044	regsvr32.exe	28
PID 3044 wrote to memory of 2916	3044	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\CoreAAC.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:3044
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\CoreAAC.dll
  2⤵
  - Modifies registry class
  PID:2916

Network

MITRE ATT&CK Matrix

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