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Analysis

  • max time kernel
    597s
  • max time network
    609s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    15-05-2021 10:18

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 gpsvc
    1⤵
      PID:1004
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
      1⤵
        PID:932
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
        1⤵
          PID:1096
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Themes
          1⤵
            PID:1136
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s SENS
            1⤵
              PID:1296
            • 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 ShellHWDetection
                1⤵
                  PID:1764
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
                  1⤵
                    PID:2424
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
                    1⤵
                      PID:2460
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                      1⤵
                        PID:2660
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                        1⤵
                          PID:2688
                        • c:\windows\system32\svchost.exe
                          c:\windows\system32\svchost.exe -k netsvcs -s Browser
                          1⤵
                            PID:2768
                          • 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:796
                            • 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:3936
                              • 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:3840
                            • 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:3040
                              • C:\Windows\system32\WerFault.exe
                                C:\Windows\system32\WerFault.exe -u -p 3040 -s 1304
                                3⤵
                                • Program crash
                                • Suspicious behavior: EnumeratesProcesses
                                • Suspicious use of AdjustPrivilegeToken
                                PID:744
                          • \??\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:1704
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k SystemNetworkService
                              2⤵
                              • Modifies registry class
                              PID:1452

                          Network

                          MITRE ATT&CK Enterprise v6

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • memory/932-178-0x000001FC3E7D0000-0x000001FC3E840000-memory.dmp

                            Filesize

                            448KB

                          • memory/1004-146-0x000001F09AA60000-0x000001F09AAD0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1096-176-0x0000023B65BB0000-0x0000023B65C20000-memory.dmp

                            Filesize

                            448KB

                          • memory/1136-184-0x0000024D34760000-0x0000024D347D0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1296-180-0x0000017A29590000-0x0000017A29600000-memory.dmp

                            Filesize

                            448KB

                          • memory/1344-186-0x000001BAFED90000-0x000001BAFEE00000-memory.dmp

                            Filesize

                            448KB

                          • memory/1452-139-0x0000011E1BEC0000-0x0000011E1BF0B000-memory.dmp

                            Filesize

                            300KB

                          • memory/1452-140-0x0000011E1C080000-0x0000011E1C0F0000-memory.dmp

                            Filesize

                            448KB

                          • memory/1704-147-0x00000266D8720000-0x00000266D8790000-memory.dmp

                            Filesize

                            448KB

                          • memory/1764-182-0x000002BBBC400000-0x000002BBBC470000-memory.dmp

                            Filesize

                            448KB

                          • memory/2424-157-0x0000019BBD240000-0x0000019BBD2B0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2460-151-0x000001EE50C80000-0x000001EE50CF0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2660-188-0x000002271FD30000-0x000002271FDA0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2688-190-0x000002856FB70000-0x000002856FBE0000-memory.dmp

                            Filesize

                            448KB

                          • memory/2768-158-0x00000255D1BD0000-0x00000255D1C40000-memory.dmp

                            Filesize

                            448KB

                          • memory/3040-128-0x0000000000A50000-0x0000000000A51000-memory.dmp

                            Filesize

                            4KB

                          • memory/3040-155-0x000000001B270000-0x000000001B272000-memory.dmp

                            Filesize

                            8KB

                          • memory/3040-129-0x0000000000A60000-0x0000000000A7C000-memory.dmp

                            Filesize

                            112KB

                          • memory/3040-130-0x0000000000A80000-0x0000000000A81000-memory.dmp

                            Filesize

                            4KB

                          • memory/3040-126-0x0000000000530000-0x0000000000531000-memory.dmp

                            Filesize

                            4KB

                          • memory/3840-141-0x0000000001190000-0x00000000011EC000-memory.dmp

                            Filesize

                            368KB

                          • memory/3840-135-0x0000000000F06000-0x0000000001007000-memory.dmp

                            Filesize

                            1.0MB