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Analysis

  • max time kernel
    1796s
  • 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:1076
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
      1⤵
        PID:2332
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
        1⤵
          PID:2388
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Browser
          1⤵
            PID:2560
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
            1⤵
              PID:2676
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s WpnService
              1⤵
                PID:2684
              • 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 SENS
                  1⤵
                    PID:1456
                  • 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:1260
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                        1⤵
                          PID:964
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:296
                          • 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:852
                            • 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:3164
                              • 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:424
                            • 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:936
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 936 -s 1340
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:2704
                          • \??\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:1100
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:972

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/296-161-0x000001D0FF320000-0x000001D0FF390000-memory.dmp

                            Filesize

                            448KB

                          • memory/424-124-0x0000000000E20000-0x0000000000E7C000-memory.dmp

                            Filesize

                            368KB

                          • memory/424-123-0x0000000004447000-0x0000000004548000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/936-190-0x000000001BD60000-0x000000001BD62000-memory.dmp

                            Filesize

                            8KB

                          • memory/936-189-0x0000000001450000-0x0000000001451000-memory.dmp

                            Filesize

                            4KB

                          • memory/936-188-0x0000000001430000-0x000000000144C000-memory.dmp

                            Filesize

                            112KB

                          • memory/936-187-0x0000000001410000-0x0000000001411000-memory.dmp

                            Filesize

                            4KB

                          • memory/936-185-0x0000000000FE0000-0x0000000000FE1000-memory.dmp

                            Filesize

                            4KB

                          • memory/964-141-0x000001FECCEC0000-0x000001FECCEC2000-memory.dmp

                            Filesize

                            8KB

                          • memory/964-169-0x000001FECD760000-0x000001FECD7D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/972-160-0x00000203A5F00000-0x00000203A5F70000-memory.dmp

                            Filesize

                            448KB

                          • memory/1076-167-0x00000212F1670000-0x00000212F16E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1100-154-0x000002513ED40000-0x000002513ED8B000-memory.dmp

                            Filesize

                            300KB

                          • memory/1100-155-0x000002513F0D0000-0x000002513F140000-memory.dmp

                            Filesize

                            448KB

                          • memory/1260-149-0x000001F0357D0000-0x000001F0357D2000-memory.dmp

                            Filesize

                            8KB

                          • memory/1260-177-0x000001F036100000-0x000001F036170000-memory.dmp

                            Filesize

                            448KB

                          • memory/1268-175-0x000001D827F40000-0x000001D827FB0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1456-171-0x0000026564990000-0x0000026564A00000-memory.dmp

                            Filesize

                            448KB

                          • memory/1896-173-0x000001EDA3640000-0x000001EDA36B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2332-165-0x000001A54DA40000-0x000001A54DAB0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2388-163-0x0000029143240000-0x00000291432B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2560-157-0x000001B1AFE50000-0x000001B1AFEC0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2676-179-0x000001A662DA0000-0x000001A662E10000-memory.dmp

                            Filesize

                            448KB

                          • memory/2676-151-0x000001A662700000-0x000001A662702000-memory.dmp

                            Filesize

                            8KB

                          • memory/2684-181-0x0000022938740000-0x00000229387B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2684-153-0x0000022937FD0000-0x0000022937FD2000-memory.dmp

                            Filesize

                            8KB