Analysis
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max time kernel
149s -
max time network
151s -
platform
windows10-2004_x64 -
resource
win10v2004-20240226-en -
resource tags
arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system -
submitted
20-06-2024 07:22
Static task
static1
Behavioral task
behavioral1
Sample
03fbd692373d259aa49042c167c526dd_JaffaCakes118.dll
Resource
win7-20240221-en
General
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Target
03fbd692373d259aa49042c167c526dd_JaffaCakes118.dll
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Size
521KB
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MD5
03fbd692373d259aa49042c167c526dd
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SHA1
c7debeff17831d13913341a56d0620f832083bef
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SHA256
9ae3c383f3dc0fad0175a3cd5fc4d5434ac35202237242b16bdc1486bb5242cc
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SHA512
43023138f5c2ec19d162907353794e16bf30b0aff60078b5be106af01fb6c1261b4dcb2c2107e137c1b21f8c5967ddde6b6731266239e5f0932972bc98ca17bb
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SSDEEP
384:zBPyZNjtU2mHkKxv3S9Xh6h6q1G2TblJR6J6xBHzrWRk2rGlGlGlGlGlGlGlGlG4:zZyZNm3I6cq1HBkwrWRkq
Malware Config
Signatures
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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\{5A069845-2036-6084-9054-6087502480A5} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{5A069845-2036-6084-9054-6087502480A5}\ = "ozfyebyt.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 rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5A069845-2036-6084-9054-6087502480A5} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5A069845-2036-6084-9054-6087502480A5}\InprocServer32\ = "C:\\Windows\\SysWow64\\ozfyebyt.dll" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5A069845-2036-6084-9054-6087502480A5}\InprocServer32\ThreadingModel = "Apartment" rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{5A069845-2036-6084-9054-6087502480A5}\InprocServer32 rundll32.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
Processes:
rundll32.exepid process 5076 rundll32.exe 5076 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
Processes:
rundll32.exedescription pid process Token: SeDebugPrivilege 5076 rundll32.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
rundll32.exerundll32.exedescription pid process target process PID 2548 wrote to memory of 5076 2548 rundll32.exe rundll32.exe PID 2548 wrote to memory of 5076 2548 rundll32.exe rundll32.exe PID 2548 wrote to memory of 5076 2548 rundll32.exe rundll32.exe PID 5076 wrote to memory of 4576 5076 rundll32.exe cmd.exe PID 5076 wrote to memory of 4576 5076 rundll32.exe cmd.exe PID 5076 wrote to memory of 4576 5076 rundll32.exe cmd.exe
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\03fbd692373d259aa49042c167c526dd_JaffaCakes118.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2548 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\03fbd692373d259aa49042c167c526dd_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:5076 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240665765.bat3⤵PID:4576
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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 --mojo-platform-channel-handle=1388 --field-trial-handle=3060,i,1774866140584649235,8085848018931772189,262144 --variations-seed-version /prefetch:81⤵PID:976
Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
121B
MD509517fc62284f33e877a276463580bd1
SHA10b14fe1db4493818f9de0bf2a56ee5370b8d479a
SHA2566cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238
SHA5121b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d