cc7d0ad50a776ac1e04369d4e9a1a44d5ef4194627ce0b613ddf8db186612179

Analysis

max time kernel
141s
max time network
126s
platform
windows10-2004_x64
resource
win10v2004-20240508-en
resource tags

arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
submitted
21/06/2024, 23:22

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General

Target
002bb1ec82d0e17c3f94b24c25c8769c_JaffaCakes118.dll
Size 45KB
Sample240621-3c2rjaygpp
SHA256 cc7d0ad50a776ac1e04369d4e9a1a44d5ef4194627ce0b613ddf8db186612179
MD5 002bb1ec82d0e17c3f94b24c25c8769c
SHA1 bcc87ec53f816014dcd0352dcdd9a922e9082504
SHA512 ee165ed97fd32c5374e200baa2756fcbc7cc1ca4c65a879c0e94757c5c1aeceb38094036d56668cd0acbb7e17dcd631d076bac5ee3af956b1bbd5a4539830a8c
SSDEEP 384:LNpdNjtU2Oi5iRSLfv6cFbX5pJH5qM8A+zMqWSF8:LNpdfT6YFH5qLMqW
MD5 SHA1 SHA512 SSDEEP

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\{25671234-7890-ABCD-CDEF-567801237652}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{25671234-7890-ABCD-CDEF-567801237652}\ = "yxcsbhlp.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
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{25671234-7890-ABCD-CDEF-567801237652}\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\{25671234-7890-ABCD-CDEF-567801237652}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{25671234-7890-ABCD-CDEF-567801237652}\InprocServer32\ = "C:\\Windows\\SysWow64\\yxcsbhlp.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{25671234-7890-ABCD-CDEF-567801237652}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2988	rundll32.exe
2988	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 3004 wrote to memory of 2988	3004	rundll32.exe	88
PID 3004 wrote to memory of 2988	3004	rundll32.exe	88
PID 3004 wrote to memory of 2988	3004	rundll32.exe	88
PID 2988 wrote to memory of 1856	2988	rundll32.exe	89
PID 2988 wrote to memory of 1856	2988	rundll32.exe	89
PID 2988 wrote to memory of 1856	2988	rundll32.exe	89

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\002bb1ec82d0e17c3f94b24c25c8769c_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:3004
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\002bb1ec82d0e17c3f94b24c25c8769c_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:2988
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240648421.bat
    3⤵
    PID:1856

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --field-trial-handle=4500,i,9746875443948590908,1444894342962555245,262144 --variations-seed-version --mojo-platform-channel-handle=4180 /prefetch:8
1⤵
PID:4580

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

~DFD240648421.bat

Path C:\Users\Admin\AppData\Local\Temp\~DFD240648421.bat
Size 121B
SHA256 6cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238
MD5 09517fc62284f33e877a276463580bd1
SHA1 0b14fe1db4493818f9de0bf2a56ee5370b8d479a
SHA512 1b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d
MD5 SHA1 SHA512

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