Analysis
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max time kernel
150s -
max time network
128s -
platform
windows10-2004_x64 -
resource
win10v2004-20240611-en -
resource tags
arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system -
submitted
20-06-2024 07:09
Static task
static1
Behavioral task
behavioral1
Sample
03e873af115a685837d203aa436c0478_JaffaCakes118.dll
Resource
win7-20240611-en
Behavioral task
behavioral2
Sample
03e873af115a685837d203aa436c0478_JaffaCakes118.dll
Resource
win10v2004-20240611-en
General
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Target
03e873af115a685837d203aa436c0478_JaffaCakes118.dll
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Size
523KB
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MD5
03e873af115a685837d203aa436c0478
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SHA1
5858c3b463cb8260254b9eb3a9ff0491704bbde0
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SHA256
67ff69794254f402a1c21e976394715801b90c71fdd1c72651e866c19f7a159d
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SHA512
a85f2d0eae3fcad7af41859433136581ae8faae66aa7cc0062b2bb3bd75f1ccc4bb2060a9c714d33f26082d953e6e5c43892c15ffb5811683e986d430b77a9c6
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SSDEEP
384:nyVlNjtU2ecXSdpn59r0uqjuN7LRLnD7dUpKfJIzU/2akF+Jy4:yVlDSjpUuLjD7Wo2i2akA
Malware Config
Signatures
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Event Triggered Execution: AppInit DLLs 1 TTPs
Adversaries may establish persistence and/or elevate privileges by executing malicious content triggered by AppInit DLLs loaded into processes.
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Installs/modifies Browser Helper Object 2 TTPs 2 IoCs
BHOs are DLL modules which act as plugins for Internet Explorer.
Processes:
rundll32.exedescription ioc process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{37AC9076-C898-B098-D098-A18319080973} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{37AC9076-C898-B098-D098-A18319080973}\ = "nhmxcjkl.dll" rundll32.exe -
Drops file in System32 directory 1 IoCs
Processes:
rundll32.exedescription ioc process File opened for modification C:\Windows\SysWOW64\verclsid.exe rundll32.exe -
Modifies registry class 6 IoCs
Processes:
rundll32.exedescription ioc process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{37AC9076-C898-B098-D098-A18319080973}\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\{37AC9076-C898-B098-D098-A18319080973} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{37AC9076-C898-B098-D098-A18319080973}\InprocServer32\ = "C:\\Windows\\SysWow64\\nhmxcjkl.dll" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{37AC9076-C898-B098-D098-A18319080973}\InprocServer32\ThreadingModel = "Apartment" rundll32.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
rundll32.exepid process 2436 rundll32.exe 2436 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
rundll32.exedescription pid process Token: SeDebugPrivilege 2436 rundll32.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 3532 wrote to memory of 2436 3532 rundll32.exe rundll32.exe PID 3532 wrote to memory of 2436 3532 rundll32.exe rundll32.exe PID 3532 wrote to memory of 2436 3532 rundll32.exe rundll32.exe PID 2436 wrote to memory of 1128 2436 rundll32.exe cmd.exe PID 2436 wrote to memory of 1128 2436 rundll32.exe cmd.exe PID 2436 wrote to memory of 1128 2436 rundll32.exe cmd.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\03e873af115a685837d203aa436c0478_JaffaCakes118.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:3532 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\03e873af115a685837d203aa436c0478_JaffaCakes118.dll,#12⤵
- 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:2436 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240597406.bat3⤵PID:1128
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
121B
MD509517fc62284f33e877a276463580bd1
SHA10b14fe1db4493818f9de0bf2a56ee5370b8d479a
SHA2566cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238
SHA5121b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d