Analysis
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max time kernel
153s -
max time network
158s -
platform
windows10-2004_x64 -
resource
win10v2004-20220812-en -
resource tags
arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system -
submitted
03-10-2022 14:07
Static task
static1
Behavioral task
behavioral1
Sample
8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe
Resource
win7-20220901-en
Behavioral task
behavioral2
Sample
8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe
Resource
win10v2004-20220812-en
General
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Target
8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe
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Size
40KB
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MD5
6921b7f5360c84bee3468f163669e680
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SHA1
bac8f4f80ff97272e2d061ef66dbdd04a0918701
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SHA256
8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8
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SHA512
fc3bb5793e71e298553d8eb55610ef0b4760da10edb2b72f9bc242a55b1f2141f890030ddcb2dfac84cf218353ae179281691083bcc6c999212ca8a666ebf167
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SSDEEP
768:/6xu9aOQFDcY77R0J0EoGhIMVcT2ZAqh+:/6xxlP6hpVWqh+
Malware Config
Signatures
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Possible privilege escalation attempt 2 IoCs
Processes:
takeown.exeicacls.exepid process 4940 takeown.exe 4828 icacls.exe -
Modifies file permissions 1 TTPs 2 IoCs
Processes:
icacls.exetakeown.exepid process 4828 icacls.exe 4940 takeown.exe -
Adds Run key to start application 2 TTPs 2 IoCs
Processes:
8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exedescription ioc process Key created \REGISTRY\MACHINE\Software\WOW6432Node\Microsoft\Windows\CurrentVersion\Run 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\DbjzZ = "C:\\Windows\\system32\\vonf.exe" 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe -
Drops file in System32 directory 2 IoCs
Processes:
8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exedescription ioc process File created C:\Windows\SysWOW64\vonf.exe 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe File opened for modification C:\Windows\SysWOW64\vonf.exe 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
Processes:
8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exepid process 4968 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe -
Suspicious use of WriteProcessMemory 6 IoCs
Processes:
8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exedescription pid process target process PID 4968 wrote to memory of 4940 4968 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe takeown.exe PID 4968 wrote to memory of 4940 4968 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe takeown.exe PID 4968 wrote to memory of 4940 4968 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe takeown.exe PID 4968 wrote to memory of 4828 4968 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe icacls.exe PID 4968 wrote to memory of 4828 4968 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe icacls.exe PID 4968 wrote to memory of 4828 4968 8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe icacls.exe
Processes
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C:\Users\Admin\AppData\Local\Temp\8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe"C:\Users\Admin\AppData\Local\Temp\8ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8.exe"1⤵
- Adds Run key to start application
- Drops file in System32 directory
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
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C:\Windows\SysWOW64\takeown.exeC:\Windows\system32\takeown.exe /f "C:\Windows\system32\vonf.exe"2⤵
- Possible privilege escalation attempt
- Modifies file permissions
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C:\Windows\SysWOW64\icacls.exeC:\Windows\system32\icacls.exe "C:\Windows\system32\vonf.exe" /grant Users:F2⤵
- Possible privilege escalation attempt
- Modifies file permissions
Network
MITRE ATT&CK Matrix ATT&CK v6
Replay Monitor
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Downloads
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C:\Windows\SysWOW64\vonf.exeFilesize
40KB
MD56921b7f5360c84bee3468f163669e680
SHA1bac8f4f80ff97272e2d061ef66dbdd04a0918701
SHA2568ef446e18b39694e433a2df399306f923791cae5de3e09ee19d3d6f9c96cd3d8
SHA512fc3bb5793e71e298553d8eb55610ef0b4760da10edb2b72f9bc242a55b1f2141f890030ddcb2dfac84cf218353ae179281691083bcc6c999212ca8a666ebf167
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memory/4828-135-0x0000000000000000-mapping.dmp
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memory/4940-134-0x0000000000000000-mapping.dmp