61b28cf088e97eccc92f968abc927c3a12cddaf9a2f8f3efaf1686c8a357efc9

Analysis

max time kernel
120s
max time network
133s
platform
windows7_x64
resource
win7-20231215-en
resource tags

arch:x64arch:x86image:win7-20231215-enlocale:en-usos:windows7-x64system
submitted
26/12/2023, 01:52

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General

Target

4aac074d93a125717f935c65c2570ced.dll
Size

140KB
MD5

4aac074d93a125717f935c65c2570ced
SHA1

9b1b4f70927d29e8d2a639e66bb33d8f1bfe2048
SHA256

61b28cf088e97eccc92f968abc927c3a12cddaf9a2f8f3efaf1686c8a357efc9
SHA512

36567d4ff55086176cf9c01a1b819972ba7f2829868b03c6c55d904ef31d2b39d596ce6d8b4d0bf3e5b96319fbd79d30e81e53a9d43a684516e90a6060caea81
SSDEEP

3072:e7Xw0CzF3+PpjdbnYM8qnYk0sB5XtXAxrB:YFY5Ir

Score

6^/10

adware stealer

Malware Config

Signatures

Installs/modifies Browser Helper Object 2 TTPs 3 IoCs

BHOs are DLL modules which act as plugins for Internet Explorer.

stealer adware

Modify Registry

T1112

Browser Extensions

T1176

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{D1ECD019-8423-43de-98D1-7892AF2DA309}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{D1ECD019-8423-43de-98D1-7892AF2DA309}\ = "FreeWorkz Games"	regsvr32.exe
Set value (int)	\REGISTRY\MACHINE\SOFTWARE\Wow6432Node\Microsoft\Windows\CurrentVersion\explorer\Browser Helper Objects\{D1ECD019-8423-43de-98D1-7892AF2DA309}\NoExplorer = "1"	regsvr32.exe

Modifies registry class 60 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}\1.0\FLAGS\ = "0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\ = "_IExtensionEvents"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\TypeLib\ = "{9B909531-FFB8-40B9-A739-18117253BF08}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}\1.0\0\win32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension.1\CLSID\ = "{D1ECD019-8423-43de-98D1-7892AF2DA309}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension\CurVer\ = "FreeWorkz.Extension.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}\1.0\0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\TypeLib\ = "{9B909531-FFB8-40B9-A739-18117253BF08}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\VersionIndependentProgID\ = "FreeWorkz.Extension"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}\1.0\ = "FreeWorkz Type Library"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\ = "_IExtensionEvents"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\ = "FreeWorkz Games"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\TypeLib\ = "{9B909531-FFB8-40B9-A739-18117253BF08}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension.1\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\ = "IExtension"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension\CLSID\ = "{D1ECD019-8423-43de-98D1-7892AF2DA309}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\ProgID\ = "FreeWorkz.Extension.1"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\TypeLib\ = "{9B909531-FFB8-40b9-A739-18117253BF08}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\TypeLib\ = "{9B909531-FFB8-40B9-A739-18117253BF08}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4aac074d93a125717f935c65c2570ced.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\ProxyStubClsid32\ = "{00020420-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\ = "IExtension"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{9B909531-FFB8-40B9-A739-18117253BF08}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension.1\ = "FreeWorkz Games"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\FreeWorkz.Extension\ = "FreeWorkz Games"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{D1ECD019-8423-43de-98D1-7892AF2DA309}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\4aac074d93a125717f935c65c2570ced.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{6FC29631-F716-47FC-9118-2498F0D788BA}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{B5B7CB41-8A10-4C67-846A-093D8F2B0113}\TypeLib\Version = "1.0"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 1692 wrote to memory of 2300	1692	regsvr32.exe	17
PID 1692 wrote to memory of 2300	1692	regsvr32.exe	17
PID 1692 wrote to memory of 2300	1692	regsvr32.exe	17
PID 1692 wrote to memory of 2300	1692	regsvr32.exe	17
PID 1692 wrote to memory of 2300	1692	regsvr32.exe	17
PID 1692 wrote to memory of 2300	1692	regsvr32.exe	17
PID 1692 wrote to memory of 2300	1692	regsvr32.exe	17

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\4aac074d93a125717f935c65c2570ced.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:1692
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\4aac074d93a125717f935c65c2570ced.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:2300

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Browser Extensions

T1176

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Windows 7 deprecation

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