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Analysis

  • max time kernel
    1793s
  • max time network
    1800s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    17-05-2021 11:08

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 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 Schedule
    1⤵
      PID:1032
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Themes
      1⤵
        PID:1268
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s UserManager
        1⤵
          PID:1316
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s SENS
          1⤵
            PID:1448
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
            1⤵
              PID:1120
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
              1⤵
                PID:68
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
                1⤵
                  PID:1896
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
                  1⤵
                    PID:2416
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Browser
                    1⤵
                      PID:2596
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                      1⤵
                        PID:2752
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                        1⤵
                          PID:2760
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
                          1⤵
                            PID:2484
                          • 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:4032
                            • 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:2108
                              • 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:3920
                            • 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:2880
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 2880 -s 1352
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:1220
                          • \??\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:1776
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:2976

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/68-173-0x000001F5A3030000-0x000001F5A30A0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1032-150-0x00000229A8860000-0x00000229A88D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1120-189-0x0000022DEB750000-0x0000022DEB7C0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1268-168-0x000002A94F1D0000-0x000002A94F240000-memory.dmp

                            Filesize

                            448KB

                          • memory/1316-174-0x00000280C1F70000-0x00000280C1FE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1448-152-0x0000024AA2090000-0x0000024AA20DB000-memory.dmp

                            Filesize

                            300KB

                          • memory/1448-155-0x0000024AA2900000-0x0000024AA2970000-memory.dmp

                            Filesize

                            448KB

                          • memory/1776-156-0x000002D77AE90000-0x000002D77AF00000-memory.dmp

                            Filesize

                            448KB

                          • memory/1896-162-0x0000021BF0CD0000-0x0000021BF0D40000-memory.dmp

                            Filesize

                            448KB

                          • memory/2416-186-0x0000011F466B0000-0x0000011F46720000-memory.dmp

                            Filesize

                            448KB

                          • memory/2484-180-0x000002D76D070000-0x000002D76D0E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2596-163-0x000001F72A790000-0x000001F72A800000-memory.dmp

                            Filesize

                            448KB

                          • memory/2752-181-0x000001E5E9040000-0x000001E5E90B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2760-187-0x0000024613A40000-0x0000024613AB0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2880-178-0x000000001B850000-0x000000001B852000-memory.dmp

                            Filesize

                            8KB

                          • memory/2880-136-0x0000000001230000-0x000000000124C000-memory.dmp

                            Filesize

                            112KB

                          • memory/2880-133-0x0000000001220000-0x0000000001221000-memory.dmp

                            Filesize

                            4KB

                          • memory/2880-139-0x0000000001250000-0x0000000001251000-memory.dmp

                            Filesize

                            4KB

                          • memory/2880-126-0x0000000000C10000-0x0000000000C11000-memory.dmp

                            Filesize

                            4KB

                          • memory/2976-167-0x000002247B7D0000-0x000002247B840000-memory.dmp

                            Filesize

                            448KB

                          • memory/3920-149-0x0000000004F10000-0x0000000004F6C000-memory.dmp

                            Filesize

                            368KB

                          • memory/3920-148-0x0000000004CB4000-0x0000000004DB5000-memory.dmp

                            Filesize

                            1.0MB