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Analysis
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max time kernel
148s -
max time network
152s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
24/12/2023, 16:28
Static task
static1
Behavioral task
behavioral1
Sample
05b451c94a1d87800d3d100f59f26ca7.dll
Resource
win7-20231215-en
Behavioral task
behavioral2
Sample
05b451c94a1d87800d3d100f59f26ca7.dll
Resource
win10v2004-20231215-en
General
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Target
05b451c94a1d87800d3d100f59f26ca7.dll
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Size
236KB
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MD5
05b451c94a1d87800d3d100f59f26ca7
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SHA1
cb66ca4280c50bff4bbd0db1c7cf64f7cc0f61f7
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SHA256
e0ca68f3cc2b8977aa07387c8492a06581db85275c5b68205036780a2d5a8099
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SHA512
950ee1da6b5f75605f20ac4c287f8551148f6d72d8c3bdf32fc8d5ca3f4603e05a36cb08301a783bad7c48beee3b19d4e1b0192f072d931c2745ce3fa1a6b2d4
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SSDEEP
1536:Iguo2K86vta10RJQYPIHL+D5IWhxRh/Ci4ucg3/+k5ltr+DRPG8Gz7wk+cQvMh:Go256vS0RJAL+lHPKi40+66iwkD0q
Malware Config
Signatures
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Adds autorun key to be loaded by Explorer.exe on startup 2 TTPs 2 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\ShellServiceObjectDelayLoad\vlpug = "{9d324292-15ba-6a0f-26cb-15baca1a58c0}" rundll32.exe -
Loads dropped DLL 1 IoCs
pid Process 3800 rundll32.exe -
Drops file in System32 directory 4 IoCs
description ioc Process File created C:\Windows\SysWOW64\iycht.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\iycht.dll rundll32.exe File created C:\Windows\SysWOW64\qgkpb.dll rundll32.exe File opened for modification C:\Windows\SysWOW64\qgkpb.dll rundll32.exe -
Modifies registry class 5 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9d324292-15ba-6a0f-26cb-15baca1a58c0}\InprocServer32\ = "C:\\Windows\\SysWow64\\qgkpb.dll" rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9d324292-15ba-6a0f-26cb-15baca1a58c0}\InprocServer32\ThreadingModel = "Apartment" rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9d324292-15ba-6a0f-26cb-15baca1a58c0} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9d324292-15ba-6a0f-26cb-15baca1a58c0}\ rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9d324292-15ba-6a0f-26cb-15baca1a58c0}\InprocServer32 rundll32.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 3800 rundll32.exe 3800 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 3800 rundll32.exe -
Suspicious use of SetWindowsHookEx 1 IoCs
pid Process 3800 rundll32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2540 wrote to memory of 3800 2540 rundll32.exe 93 PID 2540 wrote to memory of 3800 2540 rundll32.exe 93 PID 2540 wrote to memory of 3800 2540 rundll32.exe 93
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\05b451c94a1d87800d3d100f59f26ca7.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:2540 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\05b451c94a1d87800d3d100f59f26ca7.dll,#12⤵
- Adds autorun key to be loaded by Explorer.exe on startup
- Loads dropped DLL
- Drops file in System32 directory
- Modifies registry class
- Suspicious behavior: EnumeratesProcesses
- Suspicious use of AdjustPrivilegeToken
- Suspicious use of SetWindowsHookEx
PID:3800
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
478KB
MD5e99416267b61f52fa5ab994019efd359
SHA186d31eae707db7fe51d2556394fcf0e8e9f6b0fd
SHA256768c286674371564b5e6095edb56e0a4231f341be895da69cfccca5160029774
SHA5120a1c7579a9c787c2c1bef35f0660e72e74b42824e14ebea63b87ed25ddaf107e3746567bb431cab41a2f6719fad2c22d96e0715a1fe085d75805d7d66f7f05ae