577a7ec9e58665b9b840ce9618e2d330c065dc9a7d7b2109f52e392b77e839c4

Analysis

max time kernel
139s
max time network
123s
platform
windows10-2004_x64
resource
win10v2004-20240611-en
resource tags

arch:x64arch:x86image:win10v2004-20240611-enlocale:en-usos:windows10-2004-x64system
submitted
20/06/2024, 03:22

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General

Target

efbbar.dll
Size

168KB
MD5

da641973a719e465fb28389c8277009f
SHA1

d3c808a07226304e6549eed80b87272e1bcda0ea
SHA256

acf3a2dc80f5deb6d81c674a5edc163ea8ba6e6898c750159cf74ae8f00199f2
SHA512

6bffd8ffe167b0426a5021ecaefd9f1473a401e73db88708ed0561f1f2cefe18ae1b958ba7e079622b62e10d25fa0b5cc5802642f627f95275d45cd524f8c40f
SSDEEP

3072:Wf3mtWDf4Jlt71YGCKPMEPHNE2I/1/7Fx:WPm2fw7q8PLPtnm/

Score

1^/10

Malware Config

Signatures

Modifies registry class 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ = "_CHandler"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\VERSION\ = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CHandler\Clsid	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4201DC05-F928-4FA7-A991-67B8A71CE871}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ = "_CBaseBar"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\efbbar.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ProxyStubClsid	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CBaseBar\Clsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CHandler\Clsid\ = "{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\TypeLib\Version = "1.0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\efbbar.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\ProgID\ = "efinderbasebar.CHandler"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0\FLAGS\ = "0"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\ProgID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\ProgID\ = "efinderbasebar.CBaseBar"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\Implemented Categories	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0\0\win32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\efbbar.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\TypeLib\ = "{4201DC05-F928-4FA7-A991-67B8A71CE871}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CBaseBar\Clsid\ = "{C4B9EB65-5A90-493B-B947-B3C3DD62536C}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CBaseBar\ = "efinderbasebar.CBaseBar"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0\ = "efinderbasebar"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\InprocServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CBaseBar	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ = "CHandler"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ProxyStubClsid\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\Implemented Categories\{40FC6ED5-2438-11CF-A3DB-080036F12502}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\VERSION	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ProxyStubClsid	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\Programmable	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\TypeLib\ = "{4201DC05-F928-4FA7-A991-67B8A71CE871}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\ = "efinderbasebar.CHandler"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\VERSION	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0\FLAGS	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ = "_CBaseBar"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\TypeLib\ = "{4201DC05-F928-4FA7-A991-67B8A71CE871}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\TypeLib\ = "{4201DC05-F928-4FA7-A991-67B8A71CE871}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\ = "efinderbasebar.CBaseBar"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CHandler	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CHandler\ = "efinderbasebar.CHandler"	regsvr32.exe

Suspicious use of WriteProcessMemory 3 IoCs

description	pid	Process	procid_target
PID 4784 wrote to memory of 4424	4784	regsvr32.exe	90
PID 4784 wrote to memory of 4424	4784	regsvr32.exe	90
PID 4784 wrote to memory of 4424	4784	regsvr32.exe	90

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\efbbar.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:4784
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\efbbar.dll
  2⤵
  - Modifies registry class
  PID:4424

C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
"C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4460,i,16856304285138459032,14480077487839828721,262144 --variations-seed-version --mojo-platform-channel-handle=4648 /prefetch:8
1⤵
PID:5056

Analysis

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General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix

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