4e2ad03c6a455d9809affdb67d1270ceee0eb53c8a33df39b7cb2170c4e6d596

Analysis

max time kernel
140s
max time network
159s
platform
windows10-2004_x64
resource
win10v2004-20220812-en
resource tags

arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
submitted
07/02/2023, 07:18

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General

Target

BaiduNetdisk_v7.2.8.9_Portable_01/App/ProgramFiles/YunShellExt64.dll
Size

293KB
MD5

0175a724b6218c0162a29510203492c3
SHA1

74d1d70465de4aaf5fd270155c932ed707952256
SHA256

53ea1f03cfb3162c4816279c45dfc887267aba3b02eb57c3bb5d1af6e829598e
SHA512

f51cd125fe9494066f2349f000027589d198e4d61be5e023e0e461bcae5d08479c6bc8a7109317879b4f79813485fcb0c74d911c34f5022b9924f4f923a153f3
SSDEEP

6144:tofpmkF2nNiCkKX6E7K5z+GHhQu2rQQnbqOTIn1DPtb2:WpmkUNbkKX6IvrIjb2

Score

10^/10

persistence

Malware Config

Signatures

Modifies system executable filetype association 2 TTPs 2 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1042

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\YunShellExt	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\YunShellExt\ = "{6D85624F-305A-491d-8848-C1927AA0D790}"	regsvr32.exe

Registers COM server for autorun 1 TTPs 3 IoCs

persistence

Registry Run Keys / Startup Folder

T1060

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\BaiduNetdisk_v7.2.8.9_Portable_01\\App\\ProgramFiles\\YunShellExt64.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe

Modifies registry class 57 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\YunShellExt	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\YunShellExt\ = "{6D85624F-305A-491d-8848-C1927AA0D790}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\ = "YunShellExtContextMenu Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\InprocServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\BaiduNetdisk_v7.2.8.9_Portable_01\\App\\ProgramFiles\\YunShellExt64.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu\CurVer	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}\1.0\0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AppID\YunShellExt.DLL\AppID = "{B9480AFD-C7B1-4452-BE14-BB8A9540A05D}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}\1.0\HELPDIR	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\Programmable	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\YunShellExt	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\YunShellExt\ = "{6D85624F-305A-491d-8848-C1927AA0D790}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}\1.0\FLAGS	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\TypeLib	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu.1	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\ProgID\ = "YunShellExt.YunShellExtContextMenu.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\VersionIndependentProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\YunShellExt	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}\1.0\FLAGS\ = "0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\TypeLib\ = "{75711486-6BB1-4C76-853A-F3B7763FACF4}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu\CurVer\ = "YunShellExt.YunShellExtContextMenu.1"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\TypeLib	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\TypeLib\ = "{75711486-6BB1-4c76-853A-F3B7763FACF4}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu\CLSID\ = "{6D85624F-305A-491d-8848-C1927AA0D790}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}\1.0	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}\1.0\0\win64\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\BaiduNetdisk_v7.2.8.9_Portable_01\\App\\ProgramFiles\\YunShellExt64.dll"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\YunShellExt\ = "{6D85624F-305A-491d-8848-C1927AA0D790}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\TypeLib\Version = "1.0"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\InprocServer32\ThreadingModel = "Apartment"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu.1\CLSID\ = "{6D85624F-305A-491d-8848-C1927AA0D790}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\VersionIndependentProgID\ = "YunShellExt.YunShellExtContextMenu"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}\1.0\ = "YunShellExt 1.0 Type Library"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu\CLSID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\ProgID	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}\1.0\0\win64	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\InprocServer32	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\CLSID\{6D85624F-305A-491d-8848-C1927AA0D790}\AppID = "{B9480AFD-C7B1-4452-BE14-BB8A9540A05D}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\ProxyStubClsid32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\AppID\{B9480AFD-C7B1-4452-BE14-BB8A9540A05D}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\AppID\YunShellExt.DLL	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu\ = "YunShellExtContextMenu Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\ProxyStubClsid32\ = "{00020424-0000-0000-C000-000000000046}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\TypeLib\ = "{75711486-6BB1-4C76-853A-F3B7763FACF4}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\ = "IYunShellExtContextMenu"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu.1\CLSID	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\TypeLib\{75711486-6BB1-4C76-853A-F3B7763FACF4}\1.0\HELPDIR\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\BaiduNetdisk_v7.2.8.9_Portable_01\\App\\ProgramFiles"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\ = "IYunShellExtContextMenu"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\AppID\{B9480AFD-C7B1-4452-BE14-BB8A9540A05D}\ = "YunShellExt"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\YunShellExt.YunShellExtContextMenu.1\ = "YunShellExtContextMenu Class"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\WOW6432Node\Interface\{1434B2F5-5B9C-44C2-938D-2A11E03CEED9}\TypeLib\Version = "1.0"	regsvr32.exe

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\BaiduNetdisk_v7.2.8.9_Portable_01\App\ProgramFiles\YunShellExt64.dll
1⤵
- Modifies system executable filetype association
- Registers COM server for autorun
- Modifies registry class
PID:2128

Network

MITRE ATT&CK Enterprise v6

Initial Access

Execution

Persistence

Change Default File Association

T1042

Registry Run Keys / Startup Folder

T1060

Privilege Escalation

Defense Evasion

Modify Registry

T1112

Credential Access

Discovery

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Analysis

Sharing

General

Malware Config

Signatures

Processes

Network

MITRE ATT&CK Enterprise v6

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