1b04a8b971c4a85d638a5715613ba9762a2cf982ed92a1ac6f388ad543e47b17

Analysis

max time kernel
148s
max time network
150s
platform
windows10-2004_x64
resource
win10v2004-20240226-en
resource tags

arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
submitted
14/03/2024, 08:05

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General

Target

c81ee910e630d60c94cc2052240b57e0.dll
Size

168KB
MD5

c81ee910e630d60c94cc2052240b57e0
SHA1

4e4502ba390898e0f2cf158f4a5cc4fe2a0eefaf
SHA256

1b04a8b971c4a85d638a5715613ba9762a2cf982ed92a1ac6f388ad543e47b17
SHA512

aa2d7012c68ebbc8f4dd1e5ea2c707887ebd0dd6dc25f40274e4360deddecb47c3179b258cdd967f6aa6df80e043748dfbeaa802a6ae961a21dd01dffcf80b12
SSDEEP

1536:KPKmIIVFqCjHy6qdJXk0o8DHTftzrL/ti2MSGVjUf+N7ofVHfZ6dyD4s:KnIGqC+JU0PDztcjUf+7ofV/4oD

Score

6^/10

adware stealer

Malware Config

Signatures

Installs/modifies Browser Helper Object 2 TTPs 1 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\{385AB8C6-FB22-4D17-8834-064E2BA0A6F0}	regsvr32.exe

Modifies registry class 31 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\TypeLib\ = "{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}\1.0\FLAGS\ = "0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{385AB8C6-FB22-4D17-8834-064E2BA0A6F0}\TypeLib\ = "{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}\1.0\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{385AB8C6-FB22-4D17-8834-064E2BA0A6F0}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{385AB8C6-FB22-4D17-8834-064E2BA0A6F0}\ = "Info cache"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\ = "IIEHelperObj2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{385AB8C6-FB22-4D17-8834-064E2BA0A6F0}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{385AB8C6-FB22-4D17-8834-064E2BA0A6F0}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}\1.0\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}\1.0\HELPDIR	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}\1.0\ = "Pctools 1.0 Type Library"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\ = "IIEHelperObj2"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{385AB8C6-FB22-4D17-8834-064E2BA0A6F0}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}\1.0\0\win32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\c81ee910e630d60c94cc2052240b57e0.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\TypeLib\ = "{385AB8C5-FB22-4D17-8834-064E2BA0A6F0}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{385AB8C4-FB22-4D17-8834-064E2BA0A6F0}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{385AB8C6-FB22-4D17-8834-064E2BA0A6F0}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\c81ee910e630d60c94cc2052240b57e0.dll"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4532 wrote to memory of 224	4532	regsvr32.exe	88
PID 4532 wrote to memory of 224	4532	regsvr32.exe	88
PID 4532 wrote to memory of 224	4532	regsvr32.exe	88

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\c81ee910e630d60c94cc2052240b57e0.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4532
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\c81ee910e630d60c94cc2052240b57e0.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Modifies registry class
  PID:224

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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