Analysis
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max time kernel
90s -
max time network
121s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
03/02/2024, 04:42
Static task
static1
1 signatures
Behavioral task
behavioral1
Sample
8b6c9ed5e01ad1bd7c916ae65ab8257b.dll
Resource
win7-20231215-en
3 signatures
150 seconds
General
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Target
8b6c9ed5e01ad1bd7c916ae65ab8257b.dll
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Size
550KB
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MD5
8b6c9ed5e01ad1bd7c916ae65ab8257b
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SHA1
861b59390629f5db4744c5b4a68b28637540261a
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SHA256
353bdfc3389591c96afb8e4fb24104a72d1c2548f364f682e2a42f21bf71e2a1
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SHA512
2a17df4829928011237c3fbca87fc425dcc1361df8b93bf4089752b361bf07f5ee28c6060f0a01e2a13bc50e2719d35422aca7eb9d93823dfd5aae069ef6d39e
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SSDEEP
6144:iXg4N/1idqbBNELG+a9fOk8+p/nURYvRmne/H3ADTLqX4k64dS7Hto2UXOpEZyQV:UfDi4BNELGFb8Ql4HmXyNo25E0QkhTi
Malware Config
Signatures
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Installs/modifies Browser Helper Object 2 TTPs 1 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\{03C12478-A0D3-4291-A535-F6D16BA08D68} regsvr32.exe -
Modifies registry class 11 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{03C12478-A0D3-4291-A535-F6D16BA08D68}\InprocServer32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{03C12478-A0D3-4291-A535-F6D16BA08D68}\InprocServer32\ThreadingModel = "Apartment" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\8b6c9ed5e01ad1bd7c916ae65ab8257b.XunBHoSwf\Clsid regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{03C12478-A0D3-4291-A535-F6D16BA08D68}\ProgID\ = "8b6c9ed5e01ad1bd7c916ae65ab8257b.XunBHoSwf" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{03C12478-A0D3-4291-A535-F6D16BA08D68} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{03C12478-A0D3-4291-A535-F6D16BA08D68}\ = "ExSwfTrc" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{03C12478-A0D3-4291-A535-F6D16BA08D68}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8b6c9ed5e01ad1bd7c916ae65ab8257b.dll" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\8b6c9ed5e01ad1bd7c916ae65ab8257b.XunBHoSwf regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\8b6c9ed5e01ad1bd7c916ae65ab8257b.XunBHoSwf\ = "ExSwfTrc" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\8b6c9ed5e01ad1bd7c916ae65ab8257b.XunBHoSwf\Clsid\ = "{03C12478-A0D3-4291-A535-F6D16BA08D68}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{03C12478-A0D3-4291-A535-F6D16BA08D68}\ProgID regsvr32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 2448 wrote to memory of 1560 2448 regsvr32.exe 84 PID 2448 wrote to memory of 1560 2448 regsvr32.exe 84 PID 2448 wrote to memory of 1560 2448 regsvr32.exe 84
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\8b6c9ed5e01ad1bd7c916ae65ab8257b.dll1⤵
- Suspicious use of WriteProcessMemory
PID:2448 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\8b6c9ed5e01ad1bd7c916ae65ab8257b.dll2⤵
- Installs/modifies Browser Helper Object
- Modifies registry class
PID:1560
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