3871ca5cb112077c12d6f1eed51c3b7e102d17a9cc1a2c636ff274752403ed36

Analysis

max time kernel
149s
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
09/04/2024, 11:36

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General

Target
e9e67f9aea33168c2b3bddd92f326ec1_JaffaCakes118.dll
Size 21KB
Sample240409-nq4eysdh69
SHA256 3871ca5cb112077c12d6f1eed51c3b7e102d17a9cc1a2c636ff274752403ed36
MD5 e9e67f9aea33168c2b3bddd92f326ec1
SHA1 d5c13ece6bb59f86d70fd8d7e3004183e6af8004
SHA512 b1633fae0a6d7834916f9b5360a307be01f7659fec3d85b33c1ad0b51c6cfc3acda56b13141055b5c0b009f75b24694822d9ac664815625b13683333630008ee
SSDEEP 384:TPyZNjtU2mjpBhjji93NNiW3vBhzaCxeobUickYTzrNx2kP4+b:byZMfcNiOvBJ/xeRiVYvrNwkg+
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\{5D098345-6785-1098-5413-678067AE03D5}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{5D098345-6785-1098-5413-678067AE03D5}\ = "tysqbkol.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	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5D098345-6785-1098-5413-678067AE03D5}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5D098345-6785-1098-5413-678067AE03D5}\InprocServer32\ = "C:\\Windows\\SysWow64\\tysqbkol.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5D098345-6785-1098-5413-678067AE03D5}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5D098345-6785-1098-5413-678067AE03D5}\InprocServer32	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
4164	rundll32.exe
4164	rundll32.exe

Suspicious use of AdjustPrivilegeToken 1 IoCs

description	pid	Process
Token: SeDebugPrivilege	4164	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 1040 wrote to memory of 4164	1040	rundll32.exe	86
PID 1040 wrote to memory of 4164	1040	rundll32.exe	86
PID 1040 wrote to memory of 4164	1040	rundll32.exe	86
PID 4164 wrote to memory of 3200	4164	rundll32.exe	87
PID 4164 wrote to memory of 3200	4164	rundll32.exe	87
PID 4164 wrote to memory of 3200	4164	rundll32.exe	87

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9e67f9aea33168c2b3bddd92f326ec1_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:1040
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\e9e67f9aea33168c2b3bddd92f326ec1_JaffaCakes118.dll,#1
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of AdjustPrivilegeToken
  - Suspicious use of WriteProcessMemory
  PID:4164
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240598187.bat
    3⤵
    PID:3200

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

~DFD240598187.bat

Path C:\Users\Admin\AppData\Local\Temp\~DFD240598187.bat
Size 121B
SHA256 6cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238
MD5 09517fc62284f33e877a276463580bd1
SHA1 0b14fe1db4493818f9de0bf2a56ee5370b8d479a
SHA512 1b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d
MD5 SHA1 SHA512

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