Analysis
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max time kernel
142s -
max time network
150s -
platform
windows10-2004_x64 -
resource
win10v2004-20231215-en -
resource tags
arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system -
submitted
04/02/2024, 16:39
Behavioral task
behavioral1
Sample
8fa5134a7837ed1d2767f6665e19f9e1.dll
Resource
win7-20231215-en
3 signatures
150 seconds
General
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Target
8fa5134a7837ed1d2767f6665e19f9e1.dll
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Size
86KB
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MD5
8fa5134a7837ed1d2767f6665e19f9e1
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SHA1
516ec666dc8a0160d3b8480ac0627e8b7224ba7b
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SHA256
bc82fd35557df4c8d74d47305fd5de001036faed62ca6a0931d872755666913e
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SHA512
5137b20dcc5ab6189ae981a1f8b934740cf07ef34aaf1d5a9422db1e80610056a6c05b2b432ba783d008cb4497d0816791943286c82ee1ae8df70ba7389558b8
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SSDEEP
1536:9Yvynn+A2V0RLJ9PgT0cbIdVmxTNgCa78SBN53dS8pYpbCR:mv4+ALRebIu4CaDL5NSrpi
Malware Config
Signatures
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resource yara_rule behavioral2/memory/3508-0-0x0000000000400000-0x000000000043C000-memory.dmp upx -
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\{9FDA25A1-6BF5-41E8-AEC8-9F372B9EB3E6} regsvr32.exe -
Modifies registry class 6 IoCs
description ioc Process Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9FDA25A1-6BF5-41E8-AEC8-9F372B9EB3E6} regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9FDA25A1-6BF5-41E8-AEC8-9F372B9EB3E6}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\8fa5134a7837ed1d2767f6665e19f9e1.dll" regsvr32.exe Set value (str) \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9FDA25A1-6BF5-41E8-AEC8-9F372B9EB3E6}\InprocServer32\ThreadingModel = "apartment" regsvr32.exe Key created \REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{9FDA25A1-6BF5-41E8-AEC8-9F372B9EB3E6}\InprocServer32 regsvr32.exe -
Suspicious use of WriteProcessMemory 3 IoCs
description pid Process procid_target PID 1428 wrote to memory of 3508 1428 regsvr32.exe 19 PID 1428 wrote to memory of 3508 1428 regsvr32.exe 19 PID 1428 wrote to memory of 3508 1428 regsvr32.exe 19
Processes
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C:\Windows\system32\regsvr32.exeregsvr32 /s C:\Users\Admin\AppData\Local\Temp\8fa5134a7837ed1d2767f6665e19f9e1.dll1⤵
- Suspicious use of WriteProcessMemory
PID:1428 -
C:\Windows\SysWOW64\regsvr32.exe/s C:\Users\Admin\AppData\Local\Temp\8fa5134a7837ed1d2767f6665e19f9e1.dll2⤵
- Installs/modifies Browser Helper Object
- Modifies registry class
PID:3508
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