59c995dd4d2e86e4fb4f34f353fd0b8a23f44a2774599a1e864514d0f74e6ae7

Analysis

max time kernel
121s
max time network
126s
platform
windows7_x64
resource
win7-20240611-en
resource tags

arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
submitted
20/06/2024, 12:11

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General

Target
efbbar.dll
Size 168KB
Sample240620-pczehs1bpr
SHA256 acf3a2dc80f5deb6d81c674a5edc163ea8ba6e6898c750159cf74ae8f00199f2
MD5 da641973a719e465fb28389c8277009f
SHA1 d3c808a07226304e6549eed80b87272e1bcda0ea
SHA512 6bffd8ffe167b0426a5021ecaefd9f1473a401e73db88708ed0561f1f2cefe18ae1b958ba7e079622b62e10d25fa0b5cc5802642f627f95275d45cd524f8c40f
SSDEEP 3072:Wf3mtWDf4Jlt71YGCKPMEPHNE2I/1/7Fx:WPm2fw7q8PLPtnm/
MD5 SHA1 SHA512 SSDEEP

Score

1^/10

Malware Config

Signatures

Modifies registry class 64 IoCs

description	ioc	Process
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\TypeLib\ = "{4201DC05-F928-4FA7-A991-67B8A71CE871}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CBaseBar\Clsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CHandler\ = "efinderbasebar.CHandler"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}	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\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\ProgID\ = "efinderbasebar.CHandler"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ = "CHandler"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TYPELIB\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ProxyStubClsid32	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\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ = "_CBaseBar"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\TypeLib\ = "{4201DC05-F928-4FA7-A991-67B8A71CE871}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\InprocServer32	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\0	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\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\Implemented Categories\{40FC6ED5-2438-11CF-A3DB-080036F12502}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\InprocServer32\ThreadingModel = "Apartment"	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\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\TypeLib	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\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\TypeLib\ = "{4201DC05-F928-4FA7-A991-67B8A71CE871}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ProxyStubClsid	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TYPELIB\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TYPELIB\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0\0\win32	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}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CBaseBar	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CHandler\Clsid	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\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\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\VERSION	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TYPELIB\{4201DC05-F928-4FA7-A991-67B8A71CE871}\1.0\ = "efinderbasebar"	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
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ProxyStubClsid32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	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\Wow6432Node\CLSID\{71F8EBA0-DB44-40AB-B8FD-8D901FC71426}\Implemented Categories\{40FC6ED5-2438-11CF-A3DB-080036F12502}	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\efinderbasebar.CHandler	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\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\efinderbasebar.CBaseBar\ = "efinderbasebar.CBaseBar"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{FF826AD3-CEAF-402B-AE76-4530499646F3}\ = "_CHandler"	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\Wow6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ProxyStubClsid32	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\Wow6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\VERSION\ = "1.0"	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\Wow6432Node\Interface\{2827CA3D-F85B-4227-9EB0-03D665DBE27A}\ProxyStubClsid\ = "{00020424-0000-0000-C000-000000000046}"	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\Wow6432Node\CLSID\{C4B9EB65-5A90-493B-B947-B3C3DD62536C}\Implemented Categories	regsvr32.exe
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\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\Version = "1.0"	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2752 wrote to memory of 3020	2752	regsvr32.exe	28
PID 2752 wrote to memory of 3020	2752	regsvr32.exe	28
PID 2752 wrote to memory of 3020	2752	regsvr32.exe	28
PID 2752 wrote to memory of 3020	2752	regsvr32.exe	28
PID 2752 wrote to memory of 3020	2752	regsvr32.exe	28
PID 2752 wrote to memory of 3020	2752	regsvr32.exe	28
PID 2752 wrote to memory of 3020	2752	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\efbbar.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2752
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\efbbar.dll
  2⤵
  - Modifies registry class
  PID:3020

Analysis

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Malware Config

Signatures

Processes

Network

MITRE ATT&CK Matrix

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