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Analysis

  • max time kernel
    1799s
  • max time network
    1808s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    14-05-2021 13:31

General

  • Target

    keygen-step-4d.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 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 WpnService
    1⤵
      PID:2748
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
      1⤵
        PID:2728
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Browser
        1⤵
          PID:2696
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
          1⤵
            PID:2520
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
            1⤵
              PID:2512
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1888
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s SENS
                1⤵
                  PID:1392
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                  1⤵
                    PID:1300
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Themes
                    1⤵
                      PID:1160
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                      1⤵
                        PID:1088
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:1000
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:1016
                          • 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:624
                            • 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:1744
                              • 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:2788
                            • 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:3532
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 3532 -s 1304
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:3792
                          • \??\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:2444
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:3032

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/1000-178-0x000002CF77680000-0x000002CF776F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1016-149-0x000001B505AA0000-0x000001B505B10000-memory.dmp

                            Filesize

                            448KB

                          • memory/1088-176-0x0000017E96E40000-0x0000017E96EB0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1160-184-0x0000022DF75D0000-0x0000022DF7640000-memory.dmp

                            Filesize

                            448KB

                          • memory/1300-186-0x000001C147140000-0x000001C1471B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1392-180-0x000002735DE80000-0x000002735DEF0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1888-182-0x000001E87A760000-0x000001E87A7D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2444-133-0x000001DA171B0000-0x000001DA171FB000-memory.dmp

                            Filesize

                            300KB

                          • memory/2444-132-0x000001DA17270000-0x000001DA172E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2512-158-0x000002BC06040000-0x000002BC060B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2520-154-0x00000219941D0000-0x0000021994240000-memory.dmp

                            Filesize

                            448KB

                          • memory/2696-142-0x000002BE73F00000-0x000002BE73F70000-memory.dmp

                            Filesize

                            448KB

                          • memory/2728-188-0x0000014AF8940000-0x0000014AF89B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2748-190-0x000002AD03380000-0x000002AD033F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2788-131-0x0000000004F10000-0x0000000004F6C000-memory.dmp

                            Filesize

                            368KB

                          • memory/2788-129-0x0000000004DC9000-0x0000000004ECA000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/3032-145-0x0000019588470000-0x00000195884E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/3532-148-0x0000000000950000-0x0000000000951000-memory.dmp

                            Filesize

                            4KB

                          • memory/3532-134-0x0000000000920000-0x0000000000921000-memory.dmp

                            Filesize

                            4KB

                          • memory/3532-126-0x00000000004E0000-0x00000000004E1000-memory.dmp

                            Filesize

                            4KB

                          • memory/3532-153-0x0000000000CD0000-0x0000000000CD2000-memory.dmp

                            Filesize

                            8KB

                          • memory/3532-143-0x0000000000930000-0x000000000094C000-memory.dmp

                            Filesize

                            112KB