30442317b51e0cbb6e9b7d895dfe78b888de32226940a3ba58324a92ad57906e

Analysis

max time kernel
147s
max time network
127s
platform
windows10-2004_x64
resource
win10v2004-20240709-en
resource tags

arch:x64arch:x86image:win10v2004-20240709-enlocale:en-usos:windows10-2004-x64system
submitted
26/07/2024, 01:20

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General

Target

720c5b8da81ab85808fae83f14ea4185_JaffaCakes118.dll
Size

521KB
MD5

720c5b8da81ab85808fae83f14ea4185
SHA1

ea0414b40560dace16776e18e13433245ccb32e3
SHA256

30442317b51e0cbb6e9b7d895dfe78b888de32226940a3ba58324a92ad57906e
SHA512

72ee9c557f585d2442e3463aa2e0d20a15b9dcf2bcedd948d7d297cc3683453b267d8091cef3daa8df93d4aa60523ba9f9529f3016f1aab136cfc6fff175355a
SSDEEP

384:VcPyZNjtU2mE5HpNufGXc7jSFAVKVpItnIvZYzLADD3kANC4:VsyZ9HEGKVManIZ4SD3k

Score

6^/10

adware discovery 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\{5490415F-65F8-B5C5-D8BA-9405FB120545}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{5490415F-65F8-B5C5-D8BA-9405FB120545}\ = "yzztemsn.dll"	rundll32.exe

Drops file in System32 directory 1 IoCs

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

System Location Discovery: System Language Discovery 1 TTPs 2 IoCs

Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

discovery

System Language Discovery

T1614.001

description	ioc	Process
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	rundll32.exe
Key opened	\REGISTRY\MACHINE\SYSTEM\ControlSet001\Control\NLS\Language	cmd.exe

Modifies registry class 6 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5490415F-65F8-B5C5-D8BA-9405FB120545}\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\{5490415F-65F8-B5C5-D8BA-9405FB120545}	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5490415F-65F8-B5C5-D8BA-9405FB120545}\InprocServer32\ = "C:\\Windows\\SysWow64\\yzztemsn.dll"	rundll32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5490415F-65F8-B5C5-D8BA-9405FB120545}\InprocServer32\ThreadingModel = "Apartment"	rundll32.exe

Suspicious behavior: EnumeratesProcesses 2 IoCs

pid	Process
2008	rundll32.exe
2008	rundll32.exe

Suspicious use of WriteProcessMemory 6 IoCs

description	pid	Process	procid_target
PID 2536 wrote to memory of 2008	2536	rundll32.exe	84
PID 2536 wrote to memory of 2008	2536	rundll32.exe	84
PID 2536 wrote to memory of 2008	2536	rundll32.exe	84
PID 2008 wrote to memory of 4704	2008	rundll32.exe	85
PID 2008 wrote to memory of 4704	2008	rundll32.exe	85
PID 2008 wrote to memory of 4704	2008	rundll32.exe	85

C:\Windows\system32\rundll32.exe
rundll32.exe C:\Users\Admin\AppData\Local\Temp\720c5b8da81ab85808fae83f14ea4185_JaffaCakes118.dll,#1
1⤵
- Suspicious use of WriteProcessMemory
PID:2536
- C:\Windows\SysWOW64\rundll32.exe
  rundll32.exe C:\Users\Admin\AppData\Local\Temp\720c5b8da81ab85808fae83f14ea4185_JaffaCakes118.dll,#1
  2⤵
  - Installs/modifies Browser Helper Object
  - Drops file in System32 directory
  - System Location Discovery: System Language Discovery
  - Modifies registry class
  - Suspicious behavior: EnumeratesProcesses
  - Suspicious use of WriteProcessMemory
  PID:2008
- - C:\Windows\SysWOW64\cmd.exe
    C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240623468.bat
    3⤵
    - System Location Discovery: System Language Discovery
    PID:4704

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

System Location Discovery

T1614

System Language Discovery

T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

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Downloads

C:\Users\Admin\AppData\Local\Temp\~DFD240623468.bat

Filesize
121B

MD5
09517fc62284f33e877a276463580bd1

SHA1
0b14fe1db4493818f9de0bf2a56ee5370b8d479a

SHA256
6cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238

SHA512
1b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d

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