61cb47da09934f4b1e3049e01cb82996b18bca3aa159f41a359d4951b3f60866

Analysis

max time kernel
93s
max time network
98s
platform
windows10-2004_x64
resource
win10v2004-20240704-en
resource tags

arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
submitted
06/07/2024, 18:22

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General

Target

29298b8254edd9ac21900ee4bc6cdcdf_JaffaCakes118.dll
Size

839KB
MD5

29298b8254edd9ac21900ee4bc6cdcdf
SHA1

e55368d5ba1ebf49a4f4d20d55404c9b7bab47dd
SHA256

61cb47da09934f4b1e3049e01cb82996b18bca3aa159f41a359d4951b3f60866
SHA512

6df6e8a236433d0313bdb163d8a44c51e9dfeecdade0c83ba61563d097c623d4dc61c3dc2ea58c7b9663cc89cedf7527f09c1acab0de7e1465063a1c088b8d68
SSDEEP

12288:EuUlSHsf2k3dlITfY2AXPkWBsF9vTyAAkTLWmyOeDH1uAWsn60jl9bOm:9MeGNWLAMpF9vGhTb1uKn6gl9q

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\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}	regsvr32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File created	C:\Windows\SysWOW64\c__3948.nls	regsvr32.exe

Drops file in Program Files directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Program Files\Mozilla Firefox\firefox.exe	regsvr32.exe

Modifies registry class 11 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\29298b8254edd9ac21900ee4bc6cdcdf_JaffaCakes118.Microsoft Update Service\ = "NETWORK SERVICE"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID\ = "29298b8254edd9ac21900ee4bc6cdcdf_JaffaCakes118.Microsoft Update Service"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\ = "NETWORK SERVICE"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\29298b8254edd9ac21900ee4bc6cdcdf_JaffaCakes118.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\29298b8254edd9ac21900ee4bc6cdcdf_JaffaCakes118.Microsoft Update Service	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\29298b8254edd9ac21900ee4bc6cdcdf_JaffaCakes118.Microsoft Update Service\Clsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\29298b8254edd9ac21900ee4bc6cdcdf_JaffaCakes118.Microsoft Update Service\Clsid\ = "{3A4E6FF3-BF59-446E-9DC8-731BCE2F349A}"	regsvr32.exe

Suspicious behavior: EnumeratesProcesses 4 IoCs

pid	Process
5004	regsvr32.exe
5004	regsvr32.exe
5004	regsvr32.exe
5004	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4152 wrote to memory of 5004	4152	regsvr32.exe	82
PID 4152 wrote to memory of 5004	4152	regsvr32.exe	82
PID 4152 wrote to memory of 5004	4152	regsvr32.exe	82

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\29298b8254edd9ac21900ee4bc6cdcdf_JaffaCakes118.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4152
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\29298b8254edd9ac21900ee4bc6cdcdf_JaffaCakes118.dll
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - Drops file in Program Files directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  PID:5004

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

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Downloads

memory/5004-0-0x00000000021E0000-0x00000000022B9000-memory.dmp

Filesize
868KB

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