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Analysis

  • max time kernel
    1794s
  • max time network
    1765s
  • platform
    windows10_x64
  • resource
    win10v20210410
  • 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
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 2 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
  • Checks processor information in registry 2 TTPs 4 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Modifies data under HKEY_USERS 16 IoCs
  • Modifies registry class 16 IoCs
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 29 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs

Processes

  • c:\windows\system32\svchost.exe
    c:\windows\system32\svchost.exe -k netsvcs -s SENS
    1⤵
      PID:1372
    • c:\windows\system32\svchost.exe
      c:\windows\system32\svchost.exe -k netsvcs -s WpnService
      1⤵
        PID:2740
      • c:\windows\system32\svchost.exe
        c:\windows\system32\svchost.exe -k netsvcs -s Winmgmt
        1⤵
          PID:2724
        • c:\windows\system32\svchost.exe
          c:\windows\system32\svchost.exe -k netsvcs -s Browser
          1⤵
            PID:2604
          • c:\windows\system32\svchost.exe
            c:\windows\system32\svchost.exe -k netsvcs -s IKEEXT
            1⤵
              PID:2544
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s LanmanServer
              1⤵
              • Modifies registry class
              PID:2492
            • c:\windows\system32\svchost.exe
              c:\windows\system32\svchost.exe -k netsvcs -s ShellHWDetection
              1⤵
                PID:1908
              • c:\windows\system32\svchost.exe
                c:\windows\system32\svchost.exe -k netsvcs -s UserManager
                1⤵
                  PID:1340
                • c:\windows\system32\svchost.exe
                  c:\windows\system32\svchost.exe -k netsvcs -s Themes
                  1⤵
                    PID:1200
                  • 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:3896
                    • 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:2076
                      • 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:2396
                    • 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:3044
                      • C:\Windows\system32\WerFault.exe
                        C:\Windows\system32\WerFault.exe -u -p 3044 -s 1600
                        3⤵
                        • Program crash
                        • Suspicious behavior: EnumeratesProcesses
                        • Suspicious use of AdjustPrivilegeToken
                        PID:3848
                  • c:\windows\system32\svchost.exe
                    c:\windows\system32\svchost.exe -k netsvcs -s ProfSvc
                    1⤵
                      PID:1084
                    • c:\windows\system32\svchost.exe
                      c:\windows\system32\svchost.exe -k netsvcs -s Schedule
                      1⤵
                        PID:340
                      • c:\windows\system32\svchost.exe
                        c:\windows\system32\svchost.exe -k netsvcs -s gpsvc
                        1⤵
                          PID:996
                        • \??\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:3908
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k SystemNetworkService
                            2⤵
                            • Checks processor information in registry
                            • Modifies data under HKEY_USERS
                            • Modifies registry class
                            PID:936
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k SystemNetworkService
                            2⤵
                            • Drops file in System32 directory
                            • Checks processor information in registry
                            • Modifies data under HKEY_USERS
                            • Modifies registry class
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of WriteProcessMemory
                            PID:4080

                        Network

                        MITRE ATT&CK Enterprise v6

                        Replay Monitor

                        Loading Replay Monitor...

                        Downloads

                        • memory/340-181-0x00000247D6C40000-0x00000247D6CB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/340-221-0x00000247D6D90000-0x00000247D6E00000-memory.dmp

                          Filesize

                          448KB

                        • memory/936-170-0x0000014EA8E70000-0x0000014EA8EE0000-memory.dmp

                          Filesize

                          448KB

                        • memory/996-213-0x0000022561310000-0x0000022561380000-memory.dmp

                          Filesize

                          448KB

                        • memory/996-173-0x00000225612A0000-0x0000022561310000-memory.dmp

                          Filesize

                          448KB

                        • memory/1084-179-0x0000020DE1890000-0x0000020DE1900000-memory.dmp

                          Filesize

                          448KB

                        • memory/1084-219-0x0000020DE2540000-0x0000020DE25B0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1200-187-0x000001F9C71D0000-0x000001F9C7240000-memory.dmp

                          Filesize

                          448KB

                        • memory/1200-227-0x000001F9C72B0000-0x000001F9C7320000-memory.dmp

                          Filesize

                          448KB

                        • memory/1340-229-0x000001F60A820000-0x000001F60A890000-memory.dmp

                          Filesize

                          448KB

                        • memory/1340-189-0x000001F60A470000-0x000001F60A4E0000-memory.dmp

                          Filesize

                          448KB

                        • memory/1372-223-0x000001C2AF820000-0x000001C2AF890000-memory.dmp

                          Filesize

                          448KB

                        • memory/1372-183-0x000001C2AF7B0000-0x000001C2AF820000-memory.dmp

                          Filesize

                          448KB

                        • memory/1908-225-0x00000201501B0000-0x0000020150220000-memory.dmp

                          Filesize

                          448KB

                        • memory/1908-185-0x000002014FC30000-0x000002014FCA0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2396-157-0x0000000002B9D000-0x0000000002C9E000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/2396-159-0x0000000004330000-0x000000000438C000-memory.dmp

                          Filesize

                          368KB

                        • memory/2492-177-0x000002C8FAF20000-0x000002C8FAF90000-memory.dmp

                          Filesize

                          448KB

                        • memory/2492-217-0x000002C8FBA40000-0x000002C8FBAB0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2544-175-0x000001C1C5520000-0x000001C1C5590000-memory.dmp

                          Filesize

                          448KB

                        • memory/2544-215-0x000001C1C5BB0000-0x000001C1C5C20000-memory.dmp

                          Filesize

                          448KB

                        • memory/2604-169-0x000001AE946D0000-0x000001AE94740000-memory.dmp

                          Filesize

                          448KB

                        • memory/2604-211-0x000001AE94760000-0x000001AE947D0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2724-160-0x00000203D8980000-0x00000203D89F0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2724-231-0x00000203D8A20000-0x00000203D8A90000-memory.dmp

                          Filesize

                          448KB

                        • memory/2740-167-0x000002313EF60000-0x000002313EFD0000-memory.dmp

                          Filesize

                          448KB

                        • memory/2740-233-0x000002313F4B0000-0x000002313F520000-memory.dmp

                          Filesize

                          448KB

                        • memory/3044-131-0x0000000000E50000-0x0000000000E6C000-memory.dmp

                          Filesize

                          112KB

                        • memory/3044-172-0x000000001B700000-0x000000001B702000-memory.dmp

                          Filesize

                          8KB

                        • memory/3044-136-0x0000000001040000-0x0000000001041000-memory.dmp

                          Filesize

                          4KB

                        • memory/3044-128-0x0000000000E40000-0x0000000000E41000-memory.dmp

                          Filesize

                          4KB

                        • memory/3044-126-0x0000000000A10000-0x0000000000A11000-memory.dmp

                          Filesize

                          4KB

                        • memory/3908-164-0x000002476F720000-0x000002476F790000-memory.dmp

                          Filesize

                          448KB

                        • memory/3908-161-0x000002476F660000-0x000002476F6AB000-memory.dmp

                          Filesize

                          300KB

                        • memory/4080-197-0x000001B173100000-0x000001B173205000-memory.dmp

                          Filesize

                          1.0MB

                        • memory/4080-195-0x000001B170980000-0x000001B1709F0000-memory.dmp

                          Filesize

                          448KB

                        • memory/4080-192-0x000001B170780000-0x000001B1707CB000-memory.dmp

                          Filesize

                          300KB