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Analysis

  • max time kernel
    1799s
  • max time network
    1816s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    14-05-2021 13:31

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 2 IoCs
  • Modifies registry class 8 IoCs
  • Suspicious behavior: EnumeratesProcesses 21 IoCs
  • Suspicious use of AdjustPrivilegeToken 20 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 Themes
    1⤵
      PID:1276
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
      1⤵
        PID:1900
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
          PID:2508
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Browser
          1⤵
            PID:2688
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s WpnService
            1⤵
              PID:2524
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
              1⤵
              • Suspicious use of AdjustPrivilegeToken
              PID:2372
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
              1⤵
                PID:2360
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1436
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                    PID:1344
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1092
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:1032
                      • 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:584
                          • 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:1480
                            • 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:2576
                          • 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:2700
                            • C:\Windows\system32\WerFault.exe
                              C:\Windows\system32\WerFault.exe -u -p 2700 -s 1316
                              3⤵
                              • Program crash
                              • Suspicious behavior: EnumeratesProcesses
                              • Suspicious use of AdjustPrivilegeToken
                              PID:3880
                        • \??\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:3164
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k SystemNetworkService
                            2⤵
                            • Modifies registry class
                            PID:1896

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • memory/340-175-0x000001E8EF760000-0x000001E8EF7D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1032-149-0x000001DCEFA60000-0x000001DCEFAD0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1092-189-0x000001D848570000-0x000001D8485E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1276-168-0x0000020FAD340000-0x0000020FAD3B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1344-174-0x000001AFC0120000-0x000001AFC0190000-memory.dmp

                          Filesize

                          448KB

                        • memory/1436-156-0x000002AD45140000-0x000002AD451B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1436-152-0x000002AD44C60000-0x000002AD44CAB000-memory.dmp

                          Filesize

                          300KB

                        • memory/1896-169-0x000001C901500000-0x000001C901570000-memory.dmp

                          Filesize

                          448KB

                        • memory/1900-162-0x0000015957BA0000-0x0000015957C10000-memory.dmp

                          Filesize

                          448KB

                        • memory/2360-184-0x000002806CBB0000-0x000002806CC20000-memory.dmp

                          Filesize

                          448KB

                        • memory/2372-187-0x00000253F9840000-0x00000253F98B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2508-180-0x000001B9DB430000-0x000001B9DB4A0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2524-186-0x000001DC1BE80000-0x000001DC1BEF0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2576-148-0x0000000000B2E000-0x0000000000C2F000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/2576-150-0x0000000000C30000-0x0000000000C8C000-memory.dmp

                          Filesize

                          368KB

                        • memory/2688-166-0x000002A38BAA0000-0x000002A38BB10000-memory.dmp

                          Filesize

                          448KB

                        • memory/2700-173-0x000000001B590000-0x000000001B592000-memory.dmp

                          Filesize

                          8KB

                        • memory/2700-138-0x0000000002910000-0x0000000002911000-memory.dmp

                          Filesize

                          4KB

                        • memory/2700-133-0x00000000028F0000-0x000000000290C000-memory.dmp

                          Filesize

                          112KB

                        • memory/2700-130-0x00000000028D0000-0x00000000028D1000-memory.dmp

                          Filesize

                          4KB

                        • memory/2700-126-0x0000000000910000-0x0000000000911000-memory.dmp

                          Filesize

                          4KB

                        • memory/3164-155-0x00000256E06F0000-0x00000256E0760000-memory.dmp

                          Filesize

                          448KB