Analysis
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max time kernel
149s -
max time network
53s -
platform
windows10-2004_x64 -
resource
win10v2004-20240419-en -
resource tags
arch:x64arch:x86image:win10v2004-20240419-enlocale:en-usos:windows10-2004-x64system -
submitted
30-04-2024 04:41
Static task
static1
Behavioral task
behavioral1
Sample
f8273585875588de1e9b4e7bdd254dc425515b34b81f65743027f7017f11c9b4.dll
Resource
win7-20240221-en
General
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Target
f8273585875588de1e9b4e7bdd254dc425515b34b81f65743027f7017f11c9b4.dll
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Size
525KB
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MD5
9129bcad644be1aefe578bd038ecac12
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SHA1
bd5a2da2e3ba83e49f9cba6bc05f26c369eb0664
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SHA256
f8273585875588de1e9b4e7bdd254dc425515b34b81f65743027f7017f11c9b4
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SHA512
0ccffcab56017199bd5a7c3d7205c69d283dd56c9f789be27ddd5585746d7812bde23777e9f13b5eb650cab6fb07675e13c6e8aea1d7b5cc415bff178ccb50cc
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SSDEEP
1536:ehh6nANukXsssssssssssssssssssssssssssssssssssssssssssssssssssssW:4XNu6
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.
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7FD45A54-9875-698F-E56E-65102358FDF7} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects\{7FD45A54-9875-698F-E56E-65102358FDF7}\ = "apsggjba.dll" rundll32.exe -
Drops file in System32 directory 1 IoCs
description ioc Process File opened for modification C:\Windows\SysWOW64\verclsid.exe rundll32.exe -
Modifies registry class 6 IoCs
description ioc Process Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7FD45A54-9875-698F-E56E-65102358FDF7}\InprocServer32\ThreadingModel = "Apartment" rundll32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7FD45A54-9875-698F-E56E-65102358FDF7}\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\{7FD45A54-9875-698F-E56E-65102358FDF7} rundll32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{7FD45A54-9875-698F-E56E-65102358FDF7}\InprocServer32\ = "C:\\Windows\\SysWow64\\apsggjba.dll" rundll32.exe -
Suspicious behavior: EnumeratesProcesses 2 IoCs
pid Process 4412 rundll32.exe 4412 rundll32.exe -
Suspicious use of AdjustPrivilegeToken 1 IoCs
description pid Process Token: SeDebugPrivilege 4412 rundll32.exe -
Suspicious use of WriteProcessMemory 6 IoCs
description pid Process procid_target PID 3320 wrote to memory of 4412 3320 rundll32.exe 85 PID 3320 wrote to memory of 4412 3320 rundll32.exe 85 PID 3320 wrote to memory of 4412 3320 rundll32.exe 85 PID 4412 wrote to memory of 2432 4412 rundll32.exe 86 PID 4412 wrote to memory of 2432 4412 rundll32.exe 86 PID 4412 wrote to memory of 2432 4412 rundll32.exe 86
Processes
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C:\Windows\system32\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\f8273585875588de1e9b4e7bdd254dc425515b34b81f65743027f7017f11c9b4.dll,#11⤵
- Suspicious use of WriteProcessMemory
PID:3320 -
C:\Windows\SysWOW64\rundll32.exerundll32.exe C:\Users\Admin\AppData\Local\Temp\f8273585875588de1e9b4e7bdd254dc425515b34b81f65743027f7017f11c9b4.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:4412 -
C:\Windows\SysWOW64\cmd.exeC:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\~DFD240596671.bat3⤵PID:2432
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Network
MITRE ATT&CK Enterprise v15
Replay Monitor
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Downloads
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Filesize
121B
MD509517fc62284f33e877a276463580bd1
SHA10b14fe1db4493818f9de0bf2a56ee5370b8d479a
SHA2566cc6bbb1f3f754b6894d84130f5f2d86569ac3a603e1632d3cefa028f22b6238
SHA5121b924dd216d0f38199cc6df215e65ff260aa48fa37aa620dabcbc616f434643bd1f2e617d66b14bd52900214148741565128ba9589782ba582fd7308369f4a4d