Seems ok to me.
PS C:\Users\david\Downloads\SysinternalsSuite> .\sigcheck.exe .\Sysmon.exe
Sigcheck v2.81 - File version and signature viewer
Copyright (C) 2004-2021 Mark Russinovich
Sysinternals - www.sysinternals.com
C:\Users\david\Downloads\SysinternalsSuite\Sysmon.exe:
Verified: Signed
Signing date: 2:50 AM 6/23/2021
Publisher: Microsoft Corporation
Company: Sysinternals - www.sysinternals.com
Description: System activity monitor
Product: Sysinternals Sysmon
Prod version: 13.22
File version: 13.22
MachineType: 32-bit
PS C:\Users\david\Downloads\SysinternalsSuite> .\sigcheck.exe .\Sysmon64.exe
Sigcheck v2.81 - File version and signature viewer
Copyright (C) 2004-2021 Mark Russinovich
Sysinternals - www.sysinternals.com
C:\Users\david\Downloads\SysinternalsSuite\Sysmon64.exe:
Verified: Signed
Signing date: 2:45 AM 6/23/2021
Publisher: Microsoft Corporation
Company: Sysinternals - www.sysinternals.com
Description: System activity monitor
Product: Sysinternals Sysmon
Prod version: 13.22
File version: 13.22
MachineType: 64-bit
PS C:\Users\david\Downloads\SysinternalsSuite> .\Sysmon.exe -i
System Monitor v13.22 - System activity monitor
Copyright (C) 2014-2021 Mark Russinovich and Thomas Garnier
Using libxml2. libxml2 is Copyright (C) 1998-2012 Daniel Veillard. All Rights Reserved.
Sysinternals - www.sysinternals.com
Sysmon installed.
SysmonDrv installed.
Starting SysmonDrv.
SysmonDrv started.
Starting Sysmon..
Sysmon started.
PS C:\Users\david\Downloads\SysinternalsSuite> .\Sysmon.exe -u
System Monitor v13.22 - System activity monitor
Copyright (C) 2014-2021 Mark Russinovich and Thomas Garnier
Using libxml2. libxml2 is Copyright (C) 1998-2012 Daniel Veillard. All Rights Reserved.
Sysinternals - www.sysinternals.com
Stopping Sysmon.
Sysmon stopped.
Sysmon removed.
Stopping SysmonDrv.
SysmonDrv stopped.
SysmonDrv removed.
Removing service files.
PS C:\Users\david\Downloads\SysinternalsSuite> .\Sysmon64.exe -i
System Monitor v13.22 - System activity monitor
Copyright (C) 2014-2021 Mark Russinovich and Thomas Garnier
Using libxml2. libxml2 is Copyright (C) 1998-2012 Daniel Veillard. All Rights Reserved.
Sysinternals - www.sysinternals.com
Sysmon64 installed.
SysmonDrv installed.
Starting SysmonDrv.
SysmonDrv started.
Starting Sysmon64..
Sysmon64 started.
PS C:\Users\david\Downloads\SysinternalsSuite> .\Sysmon64.exe -u
System Monitor v13.22 - System activity monitor
Copyright (C) 2014-2021 Mark Russinovich and Thomas Garnier
Using libxml2. libxml2 is Copyright (C) 1998-2012 Daniel Veillard. All Rights Reserved.
Sysinternals - www.sysinternals.com
Stopping Sysmon64.
Sysmon64 stopped.
Sysmon64 removed.
Stopping SysmonDrv.
SysmonDrv stopped.
SysmonDrv removed.
Removing service files.