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Analysis

  • max time kernel
    597s
  • max time network
    604s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    27/05/2021, 20:06

General

  • Target

    keygen-step-4d.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 ProfSvc
    1⤵
      PID:1052
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s UserManager
      1⤵
        PID:1364
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Browser
        1⤵
          PID:2856
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s WpnService
          1⤵
            PID:2748
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
            1⤵
              PID:2736
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
              1⤵
                PID:2564
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
                1⤵
                  PID:2488
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
                  1⤵
                    PID:1852
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s SENS
                    1⤵
                      PID:1412
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Themes
                      1⤵
                        PID:1184
                      • 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:1020
                          • C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe
                            "C:\Users\Admin\AppData\Local\Temp\keygen-step-4d.exe"
                            1⤵
                            • Suspicious use of WriteProcessMemory
                            PID:4656
                            • 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:3680
                              • 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:4216
                            • 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:4260
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 4260 -s 1336
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:1712
                          • \??\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:4700
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:3908

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/912-153-0x000001E643CD0000-0x000001E643D40000-memory.dmp

                            Filesize

                            448KB

                          • memory/912-149-0x000001E6439F0000-0x000001E643A3B000-memory.dmp

                            Filesize

                            300KB

                          • memory/1020-177-0x00000208E1380000-0x00000208E13F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1052-148-0x000001D274080000-0x000001D2740F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1184-171-0x000001B755340000-0x000001B7553B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1364-176-0x000001AF91C10000-0x000001AF91C80000-memory.dmp

                            Filesize

                            448KB

                          • memory/1412-159-0x00000207142A0000-0x0000020714310000-memory.dmp

                            Filesize

                            448KB

                          • memory/1852-165-0x0000018641290000-0x0000018641300000-memory.dmp

                            Filesize

                            448KB

                          • memory/2488-189-0x0000020F53140000-0x0000020F531B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2564-186-0x000002167E0A0000-0x000002167E110000-memory.dmp

                            Filesize

                            448KB

                          • memory/2736-181-0x0000020851A30000-0x0000020851AA0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2748-187-0x000002E17D000000-0x000002E17D070000-memory.dmp

                            Filesize

                            448KB

                          • memory/2856-164-0x0000028DDA600000-0x0000028DDA670000-memory.dmp

                            Filesize

                            448KB

                          • memory/3908-175-0x0000024386580000-0x00000243865F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/4216-146-0x000000000498C000-0x0000000004A8D000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/4216-147-0x0000000004BF0000-0x0000000004C4C000-memory.dmp

                            Filesize

                            368KB

                          • memory/4260-129-0x0000000000A80000-0x0000000000A9C000-memory.dmp

                            Filesize

                            112KB

                          • memory/4260-130-0x0000000000A60000-0x0000000000A61000-memory.dmp

                            Filesize

                            4KB

                          • memory/4260-160-0x000000001AF80000-0x000000001AF82000-memory.dmp

                            Filesize

                            8KB

                          • memory/4260-128-0x0000000000A40000-0x0000000000A41000-memory.dmp

                            Filesize

                            4KB

                          • memory/4260-126-0x0000000000530000-0x0000000000531000-memory.dmp

                            Filesize

                            4KB

                          • memory/4700-132-0x000001EEDD6B0000-0x000001EEDD6B2000-memory.dmp

                            Filesize

                            8KB

                          • memory/4700-154-0x000001EEDD9F0000-0x000001EEDDA60000-memory.dmp

                            Filesize

                            448KB