2027554b12c12e27fee75e4a69d7186319cb392e1bc4475df9b49f38068a2638

Analysis

max time kernel
144s
max time network
139s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
16/07/2024, 00:21

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General

Target

4c0a77c45f76f817378fc9a0edef534c_JaffaCakes118.dll
Size

521KB
MD5

4c0a77c45f76f817378fc9a0edef534c
SHA1

46514abba6a9f2ae70b38d500c0dd582c655a782
SHA256

2027554b12c12e27fee75e4a69d7186319cb392e1bc4475df9b49f38068a2638
SHA512

576c844735d1eba48818267743597ab10b15089320f4edc0735c8ba2b109721dd313201794657b67789c3e448d599e0739c0a9ffd2f017497b3c833c9ddd0b54
SSDEEP

384:5lPyZNjtU2m+ByJ9Tl7pQZ6Fyi+IIe/PamZvozdvMHNnM:5dyZLyYZ6Mi+K/CmZvodvM

Score

6^/10

adware stealer

Malware Config

Signatures

Installs/modifies Browser Helper Object 2 TTPs 2 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\{35671234-7890-ABCD-CDEF-567801237653}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{35671234-7890-ABCD-CDEF-567801237653}\ = "yxcschlp.dll"	rundll32.exe

Drops file in System32 directory 1 IoCs

description	ioc	Process
File opened for modification	C:\Windows\SysWOW64\verclsid.exe	rundll32.exe

Modifies registry class 6 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{35671234-7890-ABCD-CDEF-567801237653}\InprocServer32\ = "C:\\Windows\\SysWow64\\yxcschlp.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{35671234-7890-ABCD-CDEF-567801237653}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{35671234-7890-ABCD-CDEF-567801237653}\InprocServer32	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{35671234-7890-ABCD-CDEF-567801237653}	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
400	rundll32.exe
400	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 4636 wrote to memory of 400	4636	rundll32.exe	85
PID 4636 wrote to memory of 400	4636	rundll32.exe	85
PID 4636 wrote to memory of 400	4636	rundll32.exe	85
PID 400 wrote to memory of 4020	400	rundll32.exe	86
PID 400 wrote to memory of 4020	400	rundll32.exe	86
PID 400 wrote to memory of 4020	400	rundll32.exe	86

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\4c0a77c45f76f817378fc9a0edef534c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:4636
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\4c0a77c45f76f817378fc9a0edef534c_JaffaCakes118.dll,#1
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:400
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240634609.bat
    3⤵
    PID:4020

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

Replay Monitor

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Downloads

C:\Users\Admin\AppData\Local\Temp\~DFD240634609.bat

Filesize
121B

MD5
09517fc62284f33e877a276463580bd1

SHA1
0b14fe1db4493818f9de0bf2a56ee5370b8d479a

SHA256
6cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238

SHA512
1b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d

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