fbcf4b139b3d57836e9de6f35bcd5441be4d122a9c489bb495d91b838cbbe9d6

Analysis

max time kernel
120s
max time network
124s
platform
windows7_x64
resource
win7-20230831-en
resource tags

arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
submitted
16/10/2023, 08:05

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General

Target

fbcf4b139b3d57836e9de6f35bcd5441be4d122a9c489bb495d91b838cbbe9d6.dll
Size

199KB
MD5

87cab89f064f338cea39729d8c5939fc
SHA1

3ad461bedaa46de26a0eedc7aeb45ea913c83017
SHA256

fbcf4b139b3d57836e9de6f35bcd5441be4d122a9c489bb495d91b838cbbe9d6
SHA512

05391e9cdeaf3912593d07b86cc231bd39a7a7d666b839b3e27c9ef026905392ddb1f8558bfc76861ee1ce28954180f6c0f4fc63ecf95c5db93a4aa5a0683993
SSDEEP

3072:fIIIIQ9r1YEkZ6BQkiHbqRIV2I/s6aoJ6WSxpdOkzZzFFQmkkO:fIIIIQ9r1GZ6BQ/Vts6GpdjfnkkO

Score

7^/10

persistence

Malware Config

Signatures

Modifies system executable filetype association 2 TTPs 3 IoCs

persistence

Modify Registry

T1112

Change Default File Association

T1546.001

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\FastCopy	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe

Modifies registry class 38 IoCs

description	ioc	Process
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\FastCopy	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\DragDropHandlers	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\Background\shellex\ContextMenuHandlers	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\Background\shellex\ContextMenuHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InternetShortcut\ShellEx\ContextMenuHandlers\FastCopy	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{72FF462B-AB7D-427A-A268-E22E414933D7}\InProcServer32\ThreadingModel = "Apartment"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\DragDropHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\DragDropHandlers	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\ShellEx\DragDropHandlers\FastCopy	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\Background\shellex\ContextMenuHandlers\FastCopy	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\DragDropHandlers\FastCopy	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\DragDropHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\ContextMenuHandlers\FastCopy	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{72FF462B-AB7D-427A-A268-E22E414933D7}	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\ShellEx\ContextMenuHandlers\FastCopy	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\ShellEx\ContextMenuHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\DragDropHandlers	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\DragDropHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\ContextMenuHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\InternetShortcut\shellex\ContextMenuHandlers	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{72FF462B-AB7D-427A-A268-E22E414933D7}\ = "FastCopy"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{72FF462B-AB7D-427A-A268-E22E414933D7}\InProcServer32	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\ShellEx\DragDropHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Folder\shellex\ContextMenuHandlers	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\InternetShortcut\ShellEx\ContextMenuHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\Wow6432Node\CLSID\{72FF462B-AB7D-427A-A268-E22E414933D7}\InProcServer32\ = "C:\\Users\\Admin\\AppData\\Local\\Temp\\fbcf4b139b3d57836e9de6f35bcd5441be4d122a9c489bb495d91b838cbbe9d6.dll"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\DragDropHandlers\FastCopy	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\lnkfile\shellex\ContextMenuHandlers\FastCopy	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\DragDropHandlers\FastCopy	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Directory\shellex\ContextMenuHandlers\FastCopy	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\Drive\shellex\ContextMenuHandlers	regsvr32.exe
Set value (str)	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\ContextMenuHandlers\FastCopy\ = "{72FF462B-AB7D-427A-A268-E22E414933D7}"	regsvr32.exe
Key created	\REGISTRY\MACHINE\SOFTWARE\Classes\*\shellex\DragDropHandlers	regsvr32.exe

Suspicious use of WriteProcessMemory 7 IoCs

description	pid	Process	procid_target
PID 2136 wrote to memory of 2808	2136	regsvr32.exe	28
PID 2136 wrote to memory of 2808	2136	regsvr32.exe	28
PID 2136 wrote to memory of 2808	2136	regsvr32.exe	28
PID 2136 wrote to memory of 2808	2136	regsvr32.exe	28
PID 2136 wrote to memory of 2808	2136	regsvr32.exe	28
PID 2136 wrote to memory of 2808	2136	regsvr32.exe	28
PID 2136 wrote to memory of 2808	2136	regsvr32.exe	28

C:\Windows\system32\regsvr32.exe
regsvr32 /s C:\Users\Admin\AppData\Local\Temp\fbcf4b139b3d57836e9de6f35bcd5441be4d122a9c489bb495d91b838cbbe9d6.dll
1⤵
- Suspicious use of WriteProcessMemory
PID:2136
- C:\Windows\SysWOW64\regsvr32.exe
  /s C:\Users\Admin\AppData\Local\Temp\fbcf4b139b3d57836e9de6f35bcd5441be4d122a9c489bb495d91b838cbbe9d6.dll
  2⤵
  - Modifies system executable filetype association
  - Modifies registry class
  PID:2808

Network

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Event Triggered Execution

T1546

Change Default File Association

T1546.001

Privilege Escalation

Event Triggered Execution

T1546

Change Default File Association

T1546.001

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 v15

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