File name:

Ext2Fsd-0.71-setup.exe

Full analysis: https://app.any.run/tasks/8ed9c0c8-4da8-40e8-8e00-77361abe7c64
Verdict: Malicious activity
Analysis date: July 08, 2025, 06:16:32
OS: Windows 10 Professional (build: 19044, 64 bit)
Tags:
auto-reg
Indicators:
MIME: application/vnd.microsoft.portable-executable
File info: PE32 executable (GUI) Intel 80386, for MS Windows, Nullsoft Installer self-extracting archive, 5 sections
MD5:

E1D7C469B083B7F99ED2D88D6640CBDD

SHA1:

67FC34D65C2EE03D08FFD8D89C626B819C03ED95

SHA256:

3C127F8E70C6B056A0185850EFB71B9C45D2FF493B7DF6B7B648EB89EC84214D

SSDEEP:

98304:tvi8OCS7s5LeT5IzkR86DbHGlQCz4luG8ft+TXDf9660h5Daf6vcv3elRzNGPR8a:JN3qDzCeMcX2AlRs6

ANY.RUN is an interactive service which provides full access to the guest system. Information in this report could be distorted by user actions and is provided for user acknowledgement as it is. ANY.RUN does not guarantee maliciousness or safety of the content.

  • MALICIOUS

    • Changes the autorun value in the registry

      • rundll32.exe (PID: 2792)

    • Starts NET.EXE for service management

      • Ext2Fsd-0.71-setup.exe (PID: 6896)
      • net.exe (PID: 3740)

  • SUSPICIOUS

    • The process drops C-runtime libraries

      • Ext2Fsd-0.71-setup.exe (PID: 6896)

    • Executable content was dropped or overwritten

      • Ext2Fsd-0.71-setup.exe (PID: 6896)
      • rundll32.exe (PID: 2792)
      • drvinst.exe (PID: 6812)

    • Process drops legitimate windows executable

      • Ext2Fsd-0.71-setup.exe (PID: 6896)

    • Drops a system driver (possible attempt to evade defenses)

      • Ext2Fsd-0.71-setup.exe (PID: 6896)
      • rundll32.exe (PID: 2792)
      • drvinst.exe (PID: 6812)

    • Uses RUNDLL32.EXE to load library

      • Ext2Fsd-0.71-setup.exe (PID: 6896)

    • Creates files in the driver directory

      • drvinst.exe (PID: 6812)

    • Creates a software uninstall entry

      • Ext2Fsd-0.71-setup.exe (PID: 6896)

    • There is functionality for taking screenshot (YARA)

      • Ext2Fsd-0.71-setup.exe (PID: 6896)

  • INFO

    • Reads the computer name

      • Ext2Fsd-0.71-setup.exe (PID: 6896)
      • Ext2Srv.exe (PID: 6384)

    • Checks supported languages

      • Ext2Fsd-0.71-setup.exe (PID: 6896)
      • drvinst.exe (PID: 6812)
      • Ext2Srv.exe (PID: 6384)

    • The sample compiled with english language support

      • Ext2Fsd-0.71-setup.exe (PID: 6896)
      • rundll32.exe (PID: 2792)
      • drvinst.exe (PID: 6812)

    • Creates files in the program directory

      • Ext2Fsd-0.71-setup.exe (PID: 6896)

    • Create files in a temporary directory

      • rundll32.exe (PID: 2792)

    • Creates files in the driver directory

      • rundll32.exe (PID: 2792)

    • Launching a file from a Registry key

      • rundll32.exe (PID: 2792)

    • Reads the time zone

      • runonce.exe (PID: 5564)

    • Reads security settings of Internet Explorer

      • runonce.exe (PID: 5564)

    • Checks proxy server information

      • slui.exe (PID: 1508)

    • Manual execution by a user

      • grpconv.exe (PID: 728)

    • Reads the software policy settings

      • slui.exe (PID: 1508)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
No Malware configuration.

TRiD

.exe | Win32 Executable MS Visual C++ (generic) (67.4)
.dll | Win32 Dynamic Link Library (generic) (14.2)
.exe | Win32 Executable (generic) (9.7)
.exe | Generic Win/DOS Executable (4.3)
.exe | DOS Executable Generic (4.3)

EXIF

EXE

MachineType: Intel 386 or later, and compatibles
TimeStamp: 2023:07:02 02:09:48+00:00
ImageFileCharacteristics: No relocs, Executable, No line numbers, No symbols, 32-bit
PEType: PE32
LinkerVersion: 6
CodeSize: 27136
InitializedDataSize: 184832
UninitializedDataSize: 2048
EntryPoint: 0x3532
OSVersion: 4
ImageVersion: 6
SubsystemVersion: 4
Subsystem: Windows GUI
No data.
screenshotscreenshotscreenshotscreenshotscreenshot
All screenshots are available in the full report
All screenshots are available in the full report
Total processes
151
Monitored processes
13
Malicious processes
3
Suspicious processes
0

Behavior graph

Click at the process to see the details
start ext2fsd-0.71-setup.exe rundll32.exe drvinst.exe runonce.exe no specs grpconv.exe no specs ext2srv.exe no specs conhost.exe no specs net.exe no specs conhost.exe no specs net1.exe no specs grpconv.exe no specs slui.exe ext2fsd-0.71-setup.exe no specs

Process information

PID
CMD
Path
Indicators
Parent process
728grpconv -oC:\Windows\System32\grpconv.exe—explorer.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Progman Group Converter
Exit code:
1
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\grpconv.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\user32.dll
1508C:\WINDOWS\System32\slui.exe -EmbeddingC:\Windows\System32\slui.exe
svchost.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
MEDIUM
Description:
Windows Activation Client
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\slui.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\user32.dll
1812"C:\Windows\System32\grpconv.exe" -oC:\Windows\System32\grpconv.exe—runonce.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Windows Progman Group Converter
Exit code:
1
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\grpconv.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\user32.dll
2120"C:\Users\admin\Desktop\Ext2Fsd-0.71-setup.exe" C:\Users\admin\Desktop\Ext2Fsd-0.71-setup.exe—explorer.exe
User:
admin
Integrity Level:
MEDIUM
Exit code:
3221226540
Modules
Images
c:\users\admin\desktop\ext2fsd-0.71-setup.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
2180\??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1C:\Windows\System32\conhost.exe—net.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Console Window Host
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\conhost.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\shcore.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\rpcrt4.dll
2792"C:\WINDOWS\sysnative\rundll32.exe" setupapi.dll,InstallHinfSection DefaultInstall 132 C:\Program Files\Ext2Fsd\Ext2Fsd.infC:\Windows\System32\rundll32.exe
Ext2Fsd-0.71-setup.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Windows host process (Rundll32)
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\rundll32.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\apphelp.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\shcore.dll
2804\??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1C:\Windows\System32\conhost.exe—Ext2Srv.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Console Window Host
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\conhost.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\msvcp_win.dll
c:\windows\system32\ucrtbase.dll
c:\windows\system32\shcore.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\combase.dll
c:\windows\system32\rpcrt4.dll
3740"net.exe" start Ext2FsdC:\Windows\SysWOW64\net.exe—Ext2Fsd-0.71-setup.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Net Command
Exit code:
0
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\syswow64\net.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\apphelp.dll
c:\windows\syswow64\msvcrt.dll
4512C:\WINDOWS\system32\net1 start Ext2FsdC:\Windows\SysWOW64\net1.exe—net.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Net Command
Exit code:
0
Version:
10.0.19041.3636 (WinBuild.160101.0800)
Modules
Images
c:\windows\syswow64\net1.exe
c:\windows\system32\ntdll.dll
c:\windows\syswow64\ntdll.dll
c:\windows\system32\wow64.dll
c:\windows\system32\wow64win.dll
c:\windows\system32\wow64cpu.dll
c:\windows\syswow64\kernel32.dll
c:\windows\syswow64\kernelbase.dll
c:\windows\syswow64\msvcrt.dll
c:\windows\syswow64\sechost.dll
5564"C:\WINDOWS\system32\runonce.exe" -rC:\Windows\System32\runonce.exe—rundll32.exe
User:
admin
Company:
Microsoft Corporation
Integrity Level:
HIGH
Description:
Run Once Wrapper
Exit code:
1
Version:
10.0.19041.1 (WinBuild.160101.0800)
Modules
Images
c:\windows\system32\runonce.exe
c:\windows\system32\ntdll.dll
c:\windows\system32\kernel32.dll
c:\windows\system32\kernelbase.dll
c:\windows\system32\advapi32.dll
c:\windows\system32\msvcrt.dll
c:\windows\system32\sechost.dll
c:\windows\system32\rpcrt4.dll
c:\windows\system32\bcrypt.dll
c:\windows\system32\gdi32.dll
Total events
4 272
Read events
4 259
Write events
12
Delete events
1

Modification events

(PID) Process:(2792) rundll32.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Ext2Fsd\Parameters
Operation:writeName:AutoMount
Value:
1
(PID) Process:(2792) rundll32.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Ext2Fsd\Parameters
Operation:writeName:CheckingBitmap
Value:
0
(PID) Process:(2792) rundll32.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Ext2Fsd\Parameters
Operation:writeName:Ext3ForceWriting
Value:
1
(PID) Process:(2792) rundll32.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Ext2Fsd\Parameters
Operation:writeName:WritingSupport
Value:
1
(PID) Process:(2792) rundll32.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\Ext2Fsd\Parameters
Operation:writeName:CodePage
Value:
utf8
(PID) Process:(2792) rundll32.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
Operation:writeName:GrpConv
Value:
grpconv -o
(PID) Process:(5564) runonce.exeKey:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\RunOnce
Operation:delete valueName:GrpConv
Value:
grpconv -o
(PID) Process:(2792) rundll32.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\Setup\SetupapiLogStatus
Operation:writeName:setupapi.dev.log
Value:
4096
(PID) Process:(2792) rundll32.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\EventLog\System\Ext2Fsd
Operation:writeName:EventMessageFile
Value:
%SystemRoot%\System32\IoLogMsg.Dll
(PID) Process:(2792) rundll32.exeKey:HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Services\EventLog\System\Ext2Fsd
Operation:writeName:TypesSupported
Value:
7
Executable files
13
Suspicious files
12
Text files
4
Unknown types
0

Dropped files

PID
Process
Filename
Type
6896Ext2Fsd-0.71-setup.exeC:\Program Files\Ext2Fsd\Documents\COPYRIGHT.TXTtext
MD5:0C2DD230E520648A04E451A636EE0B62
SHA256:76187EC688D52A41C9376149FAC6A5A436F641E1FFA20382F3DBB5B035D88955
6896Ext2Fsd-0.71-setup.exeC:\Program Files\Ext2Fsd\Ext2Fsd.sysexecutable
MD5:96CEA9B6EB7BAB8E55CD9EA12CF863E5
SHA256:06F6B4A6BC7AAF568D0442A3415394B2B7806C1BD94D35B314BEBFA0993898D9
6896Ext2Fsd-0.71-setup.exeC:\Program Files\Ext2Fsd\Ext2Srv.exeexecutable
MD5:81975807B60A24F34E4F6E3F92119E76
SHA256:B2E762BC7BA989A12506F02C37F49B714E075339E7C9CD0B37A04D0CF6BF1FFF
6896Ext2Fsd-0.71-setup.exeC:\Program Files\Ext2Fsd\mfc140.dllexecutable
MD5:824D14B924F8F91116CE09B927C22873
SHA256:694DDC3842544243C31B586325DB98E30A29EA86D3E96E95DC63CCE537F944F8
6896Ext2Fsd-0.71-setup.exeC:\Program Files\Ext2Fsd\vcruntime140_1.dllexecutable
MD5:EB49C1D33B41EB49DFED58AAFA9B9A8F
SHA256:6D3A6CDE6FC4D3C79AABF785C04D2736A3E2FD9B0366C9B741F054A13ECD939E
2792rundll32.exeC:\Users\admin\AppData\Local\Temp\{c631e910-ef49-7040-a5a5-a7e960235a6c}\Ext2Fsd.sysexecutable
MD5:96CEA9B6EB7BAB8E55CD9EA12CF863E5
SHA256:06F6B4A6BC7AAF568D0442A3415394B2B7806C1BD94D35B314BEBFA0993898D9
6812drvinst.exeC:\Windows\System32\DriverStore\Temp\{86244f55-a55c-ef4e-9edb-a1e95fb3b518}\SET77FF.tmpexecutable
MD5:96CEA9B6EB7BAB8E55CD9EA12CF863E5
SHA256:06F6B4A6BC7AAF568D0442A3415394B2B7806C1BD94D35B314BEBFA0993898D9
6896Ext2Fsd-0.71-setup.exeC:\Program Files\Ext2Fsd\Ext2Mgr.exeexecutable
MD5:71FCAC86719D394E7EAD9FBA7B5F348B
SHA256:15F7CFDDB6C8578AD1140C2B2868AF57660162E3782C826C30259E577942DFAB
2792rundll32.exeC:\Users\admin\AppData\Local\Temp\{c631e910-ef49-7040-a5a5-a7e960235a6c}\SET77A2.tmpexecutable
MD5:96CEA9B6EB7BAB8E55CD9EA12CF863E5
SHA256:06F6B4A6BC7AAF568D0442A3415394B2B7806C1BD94D35B314BEBFA0993898D9
2792rundll32.exeC:\Users\admin\AppData\Local\Temp\{c631e910-ef49-7040-a5a5-a7e960235a6c}\Ext2Fsd.infbinary
MD5:D36684B97C4805C77CAF463CEBF8E176
SHA256:B351054958160026B93596296DBA751D2E4345F6ADDAF26F1226441BC48AC635
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
33
TCP/UDP connections
36
DNS requests
15
Threats
1

HTTP requests

PID
Process
Method
HTTP Code
IP
URL
CN
Type
Size
Reputation
1268
svchost.exe
GET
200
2.20.245.139:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
—
—
GET
200
4.245.163.56:443
https://slscr.update.microsoft.com/SLS/%7B522D76A4-93E1-47F8-B8CE-07C937AD1A1E%7D/x64/10.0.19045.4046/0?CH=686&L=en-US&P=&PT=0x30&WUA=10.0.19041.3996&MK=DELL&MD=DELL
unknown
compressed
23.9 Kb
whitelisted
5416
SIHClient.exe
GET
200
23.216.77.6:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut_2010-06-23.crl
unknown
—
—
whitelisted
5416
SIHClient.exe
GET
200
23.35.229.160:80
http://www.microsoft.com/pkiops/crl/Microsoft%20Update%20Signing%20CA%202.1.crl
unknown
—
—
whitelisted
5416
SIHClient.exe
GET
200
23.216.77.6:80
http://crl.microsoft.com/pki/crl/products/MicTimStaPCA_2010-07-01.crl
unknown
—
—
whitelisted
5416
SIHClient.exe
GET
200
23.35.229.160:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl
unknown
—
—
whitelisted
5416
SIHClient.exe
GET
200
23.35.229.160:80
http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Signing%20CA%202.1.crl
unknown
—
—
whitelisted
3688
RUXIMICS.exe
GET
200
2.20.245.139:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
5944
MoUsoCoreWorker.exe
GET
200
2.20.245.139:80
http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl
unknown
—
—
whitelisted
5944
MoUsoCoreWorker.exe
GET
200
95.101.149.131:80
http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl
unknown
—
—
whitelisted
Download PCAP, analyze network streams, HTTP content and a lot more at the full report

Connections

PID
Process
IP
Domain
ASN
CN
Reputation
4
System
192.168.100.255:137
—
—
—
whitelisted
1268
svchost.exe
51.124.78.146:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
5944
MoUsoCoreWorker.exe
51.124.78.146:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
3688
RUXIMICS.exe
51.124.78.146:443
settings-win.data.microsoft.com
MICROSOFT-CORP-MSN-AS-BLOCK
NL
whitelisted
4
System
192.168.100.255:138
—
—
—
whitelisted
1268
svchost.exe
2.20.245.139:80
crl.microsoft.com
Akamai International B.V.
SE
whitelisted
5944
MoUsoCoreWorker.exe
2.20.245.139:80
crl.microsoft.com
Akamai International B.V.
SE
whitelisted
3688
RUXIMICS.exe
2.20.245.139:80
crl.microsoft.com
Akamai International B.V.
SE
whitelisted
5944
MoUsoCoreWorker.exe
95.101.149.131:80
www.microsoft.com
Akamai International B.V.
NL
whitelisted
1268
svchost.exe
95.101.149.131:80
www.microsoft.com
Akamai International B.V.
NL
whitelisted

DNS requests

Domain
IP
Reputation
settings-win.data.microsoft.com
  • 51.124.78.146
whitelisted
google.com
  • 172.217.18.14
whitelisted
crl.microsoft.com
  • 2.20.245.139
  • 2.20.245.137
  • 23.216.77.6
  • 23.216.77.28
whitelisted
www.microsoft.com
  • 95.101.149.131
  • 23.35.229.160
whitelisted
activation-v2.sls.microsoft.com
  • 40.91.76.224
  • 20.83.72.98
whitelisted
self.events.data.microsoft.com
  • 20.189.173.15
whitelisted
login.live.com
  • 20.190.160.67
  • 40.126.32.74
  • 20.190.160.14
  • 40.126.32.72
  • 40.126.32.133
  • 20.190.160.3
  • 20.190.160.2
  • 20.190.160.4
whitelisted
slscr.update.microsoft.com
  • 20.109.210.53
whitelisted
fe3cr.delivery.mp.microsoft.com
  • 13.85.23.206
whitelisted

Threats

PID
Process
Class
Message
—
—
Unknown Traffic
ET USER_AGENTS Microsoft Dr Watson User-Agent (MSDW)
No debug info
Interactive malware hunting service ANY.RUN
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Reports
Ext2Fsd-0.71-setup.exe