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Analysis

  • max time kernel
    60s
  • max time network
    66s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    19-05-2021 18:11

General

  • Target

    keygen-step-4.exe

Score
8/10

Malware Config

Signatures

  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Program crash 1 IoCs
  • Modifies registry class 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 16 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 24 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s Browser
    1⤵
      PID:2892
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s WpnService
      1⤵
        PID:2684
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
          PID:2676
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2484
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
              PID:2460
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1912
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1408
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1244
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                    1⤵
                      PID:1188
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                      1⤵
                        PID:1056
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:912
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:340
                          • C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe
                            "C:\Users\Admin\AppData\Local\Temp\keygen-step-4.exe"
                            1⤵
                            • Suspicious use of WriteProcessMemory
                            PID:996
                            • C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe
                              "C:\Users\Admin\AppData\Local\Temp\RarSFX0\xiuhuali.exe"
                              2⤵
                              • Executes dropped EXE
                              • Drops file in Program Files directory
                              • Suspicious use of SetWindowsHookEx
                              • Suspicious use of WriteProcessMemory
                              PID:4064
                              • C:\Windows\SysWOW64\rundll32.exe
                                "C:\Windows\System32\rundll32.exe" "C:\Program Files\install.dll",install
                                3⤵
                                • Loads dropped DLL
                                • Modifies registry class
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                • Suspicious use of WriteProcessMemory
                                PID:196
                            • C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe
                              "C:\Users\Admin\AppData\Local\Temp\RarSFX0\JoSetp.exe"
                              2⤵
                              • Executes dropped EXE
                              • Suspicious use of AdjustPrivilegeToken
                              PID:936
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 936 -s 1320
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:508
                          • \??\c:\windows\system32\svchost.exe
                            c:\windows\system32\svchost.exe -k netsvcs -s BITS
                            1⤵
                            • Suspicious use of SetThreadContext
                            • Modifies registry class
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:3976
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:412

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/196-140-0x0000000000A9C000-0x0000000000B9D000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/196-145-0x0000000000C00000-0x0000000000C5C000-memory.dmp

                            Filesize

                            368KB

                          • memory/340-141-0x0000016A35890000-0x0000016A35900000-memory.dmp

                            Filesize

                            448KB

                          • memory/412-173-0x0000015454C60000-0x0000015454CD0000-memory.dmp

                            Filesize

                            448KB

                          • memory/912-163-0x00000188F5160000-0x00000188F51D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/936-129-0x00000000008E0000-0x00000000008FC000-memory.dmp

                            Filesize

                            112KB

                          • memory/936-130-0x0000000000900000-0x0000000000901000-memory.dmp

                            Filesize

                            4KB

                          • memory/936-126-0x00000000001C0000-0x00000000001C1000-memory.dmp

                            Filesize

                            4KB

                          • memory/936-128-0x00000000008D0000-0x00000000008D1000-memory.dmp

                            Filesize

                            4KB

                          • memory/936-157-0x000000001AD80000-0x000000001AD82000-memory.dmp

                            Filesize

                            8KB

                          • memory/1056-158-0x00000229D4670000-0x00000229D46E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1188-186-0x000001D1D6800000-0x000001D1D6870000-memory.dmp

                            Filesize

                            448KB

                          • memory/1244-184-0x000001FD461D0000-0x000001FD46240000-memory.dmp

                            Filesize

                            448KB

                          • memory/1408-169-0x0000021311020000-0x0000021311090000-memory.dmp

                            Filesize

                            448KB

                          • memory/1912-174-0x000001DBA8F60000-0x000001DBA8FD0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2460-151-0x000001EF8EE40000-0x000001EF8EEB0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2484-146-0x00000205B8E60000-0x00000205B8ED0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2484-143-0x00000205B8DA0000-0x00000205B8DEB000-memory.dmp

                            Filesize

                            300KB

                          • memory/2676-188-0x000001A365B00000-0x000001A365B70000-memory.dmp

                            Filesize

                            448KB

                          • memory/2684-190-0x000001BF16CD0000-0x000001BF16D40000-memory.dmp

                            Filesize

                            448KB

                          • memory/2892-164-0x0000012848440000-0x00000128484B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/3976-152-0x000001F5A9910000-0x000001F5A9980000-memory.dmp

                            Filesize

                            448KB