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Analysis

  • max time kernel
    593s
  • max time network
    612s
  • 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 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:492
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
      1⤵
        PID:2796
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
        1⤵
          PID:2812
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Browser
          1⤵
            PID:2704
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
            1⤵
              PID:2532
            • 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:1952
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s SENS
                  1⤵
                    PID:1404
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                    1⤵
                      PID:1348
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Themes
                      1⤵
                        PID:1188
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                        1⤵
                          PID:1064
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                          1⤵
                            PID:68
                          • 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:4804
                            • 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:3468
                              • 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:4284
                            • 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:3300
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 3300 -s 1304
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:3344
                          • \??\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:4984
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:4216

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/68-171-0x000001538CF40000-0x000001538CFB0000-memory.dmp

                            Filesize

                            448KB

                          • memory/492-162-0x000002449EB50000-0x000002449EBC0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1064-155-0x000001C9E5CB0000-0x000001C9E5D20000-memory.dmp

                            Filesize

                            448KB

                          • memory/1188-184-0x0000016ABBB60000-0x0000016ABBBD0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1348-186-0x000001ECA7760000-0x000001ECA77D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1404-168-0x0000023008710000-0x0000023008780000-memory.dmp

                            Filesize

                            448KB

                          • memory/1952-174-0x000001EF56680000-0x000001EF566F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2512-150-0x000002D49CC60000-0x000002D49CCD0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2512-147-0x000002D49C5D0000-0x000002D49C61B000-memory.dmp

                            Filesize

                            300KB

                          • memory/2532-144-0x000001CB8D8A0000-0x000001CB8D910000-memory.dmp

                            Filesize

                            448KB

                          • memory/2704-161-0x0000020358B70000-0x0000020358BE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2796-188-0x000001F588210000-0x000001F588280000-memory.dmp

                            Filesize

                            448KB

                          • memory/2812-190-0x000001CCD1970000-0x000001CCD19E0000-memory.dmp

                            Filesize

                            448KB

                          • memory/3300-139-0x0000000000E00000-0x0000000000E01000-memory.dmp

                            Filesize

                            4KB

                          • memory/3300-143-0x000000001B210000-0x000000001B212000-memory.dmp

                            Filesize

                            8KB

                          • memory/3300-136-0x0000000002650000-0x000000000266C000-memory.dmp

                            Filesize

                            112KB

                          • memory/3300-131-0x0000000000DF0000-0x0000000000DF1000-memory.dmp

                            Filesize

                            4KB

                          • memory/3300-126-0x0000000000550000-0x0000000000551000-memory.dmp

                            Filesize

                            4KB

                          • memory/4216-163-0x000002C68E1D0000-0x000002C68E240000-memory.dmp

                            Filesize

                            448KB

                          • memory/4284-145-0x0000000000BE0000-0x0000000000C3C000-memory.dmp

                            Filesize

                            368KB

                          • memory/4284-140-0x000000000098A000-0x0000000000A8B000-memory.dmp

                            Filesize

                            1.0MB

                          • memory/4984-151-0x0000024EF0300000-0x0000024EF0370000-memory.dmp

                            Filesize

                            448KB