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Analysis
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max time kernel
39s -
max time network
122s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
31/12/2023, 04:55
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
2904d2af7581f1af6e4ba7a4e8522edf.dll
Resource
win7-20231215-en
1 signatures
150 seconds
Behavioral task
behavioral2
Sample
2904d2af7581f1af6e4ba7a4e8522edf.dll
Resource
win10v2004-20231222-en
9 signatures
150 seconds
General
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Target
2904d2af7581f1af6e4ba7a4e8522edf.dll
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Size
25KB
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MD5
2904d2af7581f1af6e4ba7a4e8522edf
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SHA1
0f180073f8f9714773fe762f2d2cf3024139afbb
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SHA256
106171ba77bb1bbd0f4d3e52fec22430e6c1864a94c7ae80e5b0c6c590285b33
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SHA512
f49b5fcebe85b6fe4549816afe571dffd297ebfc7426c80d5d6ed62aaefd1528cf5e3fb8eecf0c259d3afef2fe377d98e25422be03af50f7fb0aab546bbeabc0
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SSDEEP
384:mdZibPLqEH883VHVkTlHOl4/cHK3b4y9T00TTWSyA/YNDtrHEyy:mT8qgoSpHK560TTWSqNDtrq
Score
7/10
Malware Config
Signatures
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Loads dropped DLL 3 IoCs
pid Process 3168 rundll32.exe 3168 rundll32.exe 3496 rundll32.exe -
Adds Run key to start application 2 TTPs 1 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run\MSServer = "rundll32.exe C:\\Windows\\system32\\geBrqolJ.dll,#1" rundll32.exe -
Drops file in System32 directory 2 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\geBrqolJ.dll rundll32.exe File created C:\Windows\SysWOW64\geBrqolJ.dll rundll32.exe -
Modifies registry class 4 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F6BB0E4E-AC9D-496A-8984-74AE48321127}\InprocServer32 rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F6BB0E4E-AC9D-496A-8984-74AE48321127}\InprocServer32\ = "C:\\Windows\\SysWow64\\geBrqolJ.dll" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F6BB0E4E-AC9D-496A-8984-74AE48321127}\InprocServer32\ThreadingModel = "Both" rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{F6BB0E4E-AC9D-496A-8984-74AE48321127} rundll32.exe -
Suspicious behavior: EnumeratesProcesses 22 IoCs
pid Process 3168 rundll32.exe 3168 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe 3496 rundll32.exe -
Suspicious behavior: RenamesItself 1 IoCs
pid Process 3168 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3168 rundll32.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3168 rundll32.exe -
Suspicious use of WriteProcessMemory 7 IoCs
description pid Process procid_target PID 4328 wrote to memory of 3168 4328 rundll32.exe 16 PID 4328 wrote to memory of 3168 4328 rundll32.exe 16 PID 4328 wrote to memory of 3168 4328 rundll32.exe 16 PID 3168 wrote to memory of 612 3168 rundll32.exe 86 PID 3168 wrote to memory of 3496 3168 rundll32.exe 100 PID 3168 wrote to memory of 3496 3168 rundll32.exe 100 PID 3168 wrote to memory of 3496 3168 rundll32.exe 100
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\2904d2af7581f1af6e4ba7a4e8522edf.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:4328 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\2904d2af7581f1af6e4ba7a4e8522edf.dll,#12⤵
- Loads dropped DLL
- Drops file in System32 directory
- Suspicious behavior: EnumeratesProcesses
- Suspicious behavior: RenamesItself
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
- Suspicious use of WriteProcessMemory
PID:3168 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Windows\system32\geBrqolJ.dll,a3⤵
- Loads dropped DLL
- Adds Run key to start application
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
PID:3496
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C:\Windows\system32\winlogon.exewinlogon.exe1⤵PID:612