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Analysis

  • max time kernel
    1800s
  • max time network
    1812s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    16-05-2021 10:08

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 21 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:340
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s Themes
      1⤵
        PID:1276
      • 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 SENS
          1⤵
            PID:1436
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
            1⤵
              PID:1092
            • 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 Browser
                1⤵
                  PID:2688
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s WpnService
                  1⤵
                    PID:2524
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
                    1⤵
                      PID:2508
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
                      1⤵
                      • Suspicious use of AdjustPrivilegeToken
                      PID:2372
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
                      1⤵
                        PID:2360
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
                        1⤵
                          PID:1900
                        • 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:644
                          • 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:2544
                            • 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:3140
                          • 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:752
                            • C:\Windows\system32\WerFault.exe
                              C:\Windows\system32\WerFault.exe -u -p 752 -s 1304
                              3⤵
                              • Program crash
                              • Suspicious behavior: EnumeratesProcesses
                              • Suspicious use of AdjustPrivilegeToken
                              PID:1020
                        • \??\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:4088
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k SystemNetworkService
                            2⤵
                            • Modifies registry class
                            PID:1516

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • memory/340-172-0x000001E8EF760000-0x000001E8EF7D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/752-133-0x0000000002E50000-0x0000000002E51000-memory.dmp

                          Filesize

                          4KB

                        • memory/752-171-0x000000001B7C0000-0x000000001B7C2000-memory.dmp

                          Filesize

                          8KB

                        • memory/752-127-0x0000000000C40000-0x0000000000C41000-memory.dmp

                          Filesize

                          4KB

                        • memory/752-129-0x0000000002D00000-0x0000000002D01000-memory.dmp

                          Filesize

                          4KB

                        • memory/752-130-0x0000000002D10000-0x0000000002D2C000-memory.dmp

                          Filesize

                          112KB

                        • memory/1032-180-0x000001DCEFA60000-0x000001DCEFAD0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1092-178-0x000001D848570000-0x000001D8485E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1276-186-0x0000020FAD340000-0x0000020FAD3B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1344-188-0x000001AFC0120000-0x000001AFC0190000-memory.dmp

                          Filesize

                          448KB

                        • memory/1436-182-0x000002AD45140000-0x000002AD451B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1516-169-0x0000020ABE890000-0x0000020ABE900000-memory.dmp

                          Filesize

                          448KB

                        • memory/1900-184-0x0000015957BA0000-0x0000015957C10000-memory.dmp

                          Filesize

                          448KB

                        • memory/2360-174-0x000002806CBB0000-0x000002806CC20000-memory.dmp

                          Filesize

                          448KB

                        • memory/2372-176-0x00000253F9840000-0x00000253F98B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2508-190-0x000001B9DB430000-0x000001B9DB4A0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2524-165-0x000001DC1BE80000-0x000001DC1BEF0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2688-168-0x000002A38BAA0000-0x000002A38BB10000-memory.dmp

                          Filesize

                          448KB

                        • memory/3140-159-0x0000000004B50000-0x0000000004BAC000-memory.dmp

                          Filesize

                          368KB

                        • memory/3140-126-0x0000000004913000-0x0000000004A14000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/4088-161-0x0000024C7FA60000-0x0000024C7FAD0000-memory.dmp

                          Filesize

                          448KB

                        • memory/4088-160-0x0000024C7F6E0000-0x0000024C7F72B000-memory.dmp

                          Filesize

                          300KB