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Analysis

  • max time kernel
    1798s
  • max time network
    1804s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    16-05-2021 10:08

General

  • Target

    keygen-step-4.exe

  • Size

    4.6MB

  • MD5

    563107b1df2a00f4ec868acd9e08a205

  • SHA1

    9cb9c91d66292f5317aa50d92e38834861e9c9b7

  • SHA256

    bf2bd257dde4921ce83c7c1303fafe7f9f81e53c2775d3c373ced482b22eb8a9

  • SHA512

    99a8d247fa435c4cd95be7bc64c7dd6e382371f3a3c160aac3995fd705e4fd3f6622c23784a4ae3457c87536347d15eda3f08aa616450778a99376df540d74d1

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 data under HKEY_USERS 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:1108
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s SENS
      1⤵
        PID:1440
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s UserManager
        1⤵
          PID:1296
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Themes
          1⤵
            PID:1224
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
            1⤵
              PID:1992
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s Schedule
              1⤵
                PID:1064
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
                1⤵
                  PID:2544
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                  1⤵
                    PID:2724
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                    1⤵
                      PID:2700
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Browser
                      1⤵
                        PID:2740
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
                        1⤵
                          PID:2464
                        • 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:672
                            • 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:3728
                              • 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:2676
                            • 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:2736
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 2736 -s 1344
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:4092
                          • \??\c:\windows\system32\svchost.exe
                            c:\windows\system32\svchost.exe -k netsvcs -s BITS
                            1⤵
                            • Suspicious use of SetThreadContext
                            • Modifies data under HKEY_USERS
                            • Modifies registry class
                            • Suspicious behavior: EnumeratesProcesses
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:368
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:2132

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/340-142-0x000001A14E090000-0x000001A14E0DB000-memory.dmp

                            Filesize

                            300KB

                          • memory/340-146-0x000001A14E380000-0x000001A14E3F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/368-147-0x0000026F40E50000-0x0000026F40EC0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1064-178-0x000001E1F2B70000-0x000001E1F2BE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1108-176-0x000001FE3EC70000-0x000001FE3ECE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1224-184-0x00000220C3B70000-0x00000220C3BE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1296-186-0x0000021A3CEC0000-0x0000021A3CF30000-memory.dmp

                            Filesize

                            448KB

                          • memory/1440-180-0x0000029F58ED0000-0x0000029F58F40000-memory.dmp

                            Filesize

                            448KB

                          • memory/1992-182-0x000001B4ED2B0000-0x000001B4ED320000-memory.dmp

                            Filesize

                            448KB

                          • memory/2132-144-0x0000015885200000-0x0000015885270000-memory.dmp

                            Filesize

                            448KB

                          • memory/2464-174-0x000001EFDC930000-0x000001EFDC9A0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2544-152-0x000001E8ED360000-0x000001E8ED3D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2676-139-0x0000000000570000-0x00000000005CC000-memory.dmp

                            Filesize

                            368KB

                          • memory/2676-131-0x00000000008E8000-0x00000000009E9000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/2700-188-0x000001A596F10000-0x000001A596F80000-memory.dmp

                            Filesize

                            448KB

                          • memory/2724-190-0x000001C9017D0000-0x000001C901840000-memory.dmp

                            Filesize

                            448KB

                          • memory/2736-130-0x0000000000EB0000-0x0000000000EB1000-memory.dmp

                            Filesize

                            4KB

                          • memory/2736-129-0x0000000000E90000-0x0000000000EAC000-memory.dmp

                            Filesize

                            112KB

                          • memory/2736-128-0x0000000000E80000-0x0000000000E81000-memory.dmp

                            Filesize

                            4KB

                          • memory/2736-126-0x0000000000670000-0x0000000000671000-memory.dmp

                            Filesize

                            4KB

                          • memory/2736-137-0x000000001B2C0000-0x000000001B2C2000-memory.dmp

                            Filesize

                            8KB

                          • memory/2740-156-0x000002812EB30000-0x000002812EBA0000-memory.dmp

                            Filesize

                            448KB