Analysis
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max time kernel
144s -
max time network
149s -
platform
windows10-2004_x64 -
resource
win10v2004-20231222-en -
resource tags
arch:x64arch:x86image:win10v2004-20231222-enlocale:en-usos:windows10-2004-x64system -
submitted
04/02/2024, 17:42
Behavioral task
behavioral1
Sample
8fc3a047adee8a3c088e0db30aa2da1d.dll
Resource
win7-20231215-en
3 signatures
150 seconds
General
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Target
8fc3a047adee8a3c088e0db30aa2da1d.dll
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Size
281KB
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MD5
8fc3a047adee8a3c088e0db30aa2da1d
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SHA1
654385c071195437caeb0cb1217cf0fedd4f7ca8
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SHA256
01fbc97e30085502c8c512030e5f5d1af209355390028c1e18fe129efd2cbe28
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SHA512
cf159130cc43f87d4f9cf18824eea8080bdc143df9235b364787d85c8c9b60525069c9ec71e80b1054d6e808adc437d7a0ab4e49ef99b019b2dec7ea93226c7d
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SSDEEP
6144:epf5y2E+YGYsfsEG65FUG/gcTdADC7UnZJraZ4YnfavoHg1:iPEbGY3EeGUCwn+Z4YCgA
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\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8} regsvr32.exe -
Modifies registry class 11 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\ProgID regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\ = "Explore.Tuoll" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\InprocServer32 regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8fc3a047adee8a3c088e0db30aa2da1d.dll" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\InprocServer32\ThreadingModel = "Apartment" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll\Clsid regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll\Clsid\ = "{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll\ = "Explore.Tuoll" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{4DAE9566-953C-4DF1-8E9C-55B7890A3AE8}\ProgID\ = "8fc3a047adee8a3c088e0db30aa2da1d.QExpTuoll" regsvr32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 4000 wrote to memory of 860 4000 regsvr32.exe 31 PID 4000 wrote to memory of 860 4000 regsvr32.exe 31 PID 4000 wrote to memory of 860 4000 regsvr32.exe 31
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\8fc3a047adee8a3c088e0db30aa2da1d.dll1⤵
- Suspicious use of WriteProcessMemory
PID:4000 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\8fc3a047adee8a3c088e0db30aa2da1d.dll2⤵
- Installs/modifies Browser Helper Object
- Modifies registry class
PID:860
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