Analysis

  • max time kernel
    135s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    09-12-2024 08:19

General

  • Target

    766b497466955f86e0d049c25aa6f99880d230acbb8d1141408fe0e8169fb46a.exe

  • Size

    987KB

  • MD5

    8f81ac89b9f6dbccf07a86af59faa6ba

  • SHA1

    0d97a27bacaae103f2f15637f623d3d13a568d91

  • SHA256

    766b497466955f86e0d049c25aa6f99880d230acbb8d1141408fe0e8169fb46a

  • SHA512

    452c04ec647dd84123ffb84f1ff37aef81057edf0c1a069113d0b1d89f2462c373301aa84355d0fafd8bb6c4b3d4b6bf580952f29189157edaea376711be16ea

  • SSDEEP

    24576:2TbBv5rUyXVUxJMVI3SyKnUh9E1bm67+f:IBJcJMrEh9mbc

Malware Config

Signatures

  • DcRat

    DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

  • Dcrat family
  • DCRat payload 4 IoCs
  • Executes dropped EXE 6 IoCs
  • Loads dropped DLL 2 IoCs
  • Drops file in Program Files directory 4 IoCs
  • Drops file in Windows directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 3 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 1 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\766b497466955f86e0d049c25aa6f99880d230acbb8d1141408fe0e8169fb46a.exe
    "C:\Users\Admin\AppData\Local\Temp\766b497466955f86e0d049c25aa6f99880d230acbb8d1141408fe0e8169fb46a.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2548
    • C:\Windows\SysWOW64\WScript.exe
      "C:\Windows\System32\WScript.exe" "C:\Intorefnet\wF0tJ2zNcmafpzDn9Ons.vbe"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2532
      • C:\Windows\SysWOW64\cmd.exe
        cmd /c ""C:\Intorefnet\Te60v9QbFjSF8KEQUR.bat" "
        3⤵
        • Loads dropped DLL
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:2564
        • C:\Intorefnet\hyperBlockCrtCommon.exe
          "C:\Intorefnet/hyperBlockCrtCommon.exe"
          4⤵
          • Executes dropped EXE
          • Drops file in Program Files directory
          • Drops file in Windows directory
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:2704
          • C:\Windows\System32\cmd.exe
            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\TbU66uzUwI.bat"
            5⤵
            • Suspicious use of WriteProcessMemory
            PID:2580
            • C:\Windows\system32\chcp.com
              chcp 65001
              6⤵
                PID:2772
              • C:\Windows\system32\w32tm.exe
                w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                6⤵
                  PID:1224
                • C:\Windows\it-IT\lsass.exe
                  "C:\Windows\it-IT\lsass.exe"
                  6⤵
                  • Executes dropped EXE
                  • Suspicious behavior: EnumeratesProcesses
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:2840
                  • C:\Windows\System32\cmd.exe
                    "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\oR202sdZsO.bat"
                    7⤵
                    • Suspicious use of WriteProcessMemory
                    PID:1464
                    • C:\Windows\system32\chcp.com
                      chcp 65001
                      8⤵
                        PID:2952
                      • C:\Windows\system32\w32tm.exe
                        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                        8⤵
                          PID:2908
                        • C:\Windows\it-IT\lsass.exe
                          "C:\Windows\it-IT\lsass.exe"
                          8⤵
                          • Executes dropped EXE
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:1080
                          • C:\Windows\System32\cmd.exe
                            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\1v3DIijE8M.bat"
                            9⤵
                            • Suspicious use of WriteProcessMemory
                            PID:1420
                            • C:\Windows\system32\chcp.com
                              chcp 65001
                              10⤵
                                PID:1904
                              • C:\Windows\system32\w32tm.exe
                                w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                                10⤵
                                  PID:1620
                                • C:\Windows\it-IT\lsass.exe
                                  "C:\Windows\it-IT\lsass.exe"
                                  10⤵
                                  • Executes dropped EXE
                                  • Suspicious use of AdjustPrivilegeToken
                                  • Suspicious use of WriteProcessMemory
                                  PID:2336
                                  • C:\Windows\System32\cmd.exe
                                    "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\1v3DIijE8M.bat"
                                    11⤵
                                    • Suspicious use of WriteProcessMemory
                                    PID:3008
                                    • C:\Windows\system32\chcp.com
                                      chcp 65001
                                      12⤵
                                        PID:1956
                                      • C:\Windows\system32\w32tm.exe
                                        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                                        12⤵
                                          PID:948
                                        • C:\Windows\it-IT\lsass.exe
                                          "C:\Windows\it-IT\lsass.exe"
                                          12⤵
                                          • Executes dropped EXE
                                          • Suspicious use of AdjustPrivilegeToken
                                          • Suspicious use of WriteProcessMemory
                                          PID:928
                                          • C:\Windows\System32\cmd.exe
                                            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ghJDzcD21F.bat"
                                            13⤵
                                            • Suspicious use of WriteProcessMemory
                                            PID:2216
                                            • C:\Windows\system32\chcp.com
                                              chcp 65001
                                              14⤵
                                                PID:3036
                                              • C:\Windows\system32\PING.EXE
                                                ping -n 10 localhost
                                                14⤵
                                                • System Network Configuration Discovery: Internet Connection Discovery
                                                • Runs ping.exe
                                                PID:1984
                                              • C:\Windows\it-IT\lsass.exe
                                                "C:\Windows\it-IT\lsass.exe"
                                                14⤵
                                                • Executes dropped EXE
                                                • Suspicious use of AdjustPrivilegeToken
                                                PID:2988

                    Network

                    MITRE ATT&CK Enterprise v15

                    Replay Monitor

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                    Downloads

                    • C:\Intorefnet\Te60v9QbFjSF8KEQUR.bat

                      Filesize

                      84B

                      MD5

                      7fef6d8e0a11e2dec6af7a0e3b952b06

                      SHA1

                      b95534abb31712b49087005da4cdd4c92fe35edd

                      SHA256

                      6bb327123f7ec740bb03b3405c5cd790199ba132091d1ceae4f098a29c0e9592

                      SHA512

                      2c19d8ac297e3e0d790f844aedac3be3934a274ba834b66f36994ccdfd8e8c49b836d7a0df1e28de999cec7e1b5984a90199f4e08bc30d8113c4852fb9a27703

                    • C:\Intorefnet\wF0tJ2zNcmafpzDn9Ons.vbe

                      Filesize

                      206B

                      MD5

                      926c428eaa357b6ff5474252ee2821fe

                      SHA1

                      623205127383f9cc804a3af035448cc396e704e3

                      SHA256

                      80675c3ae85f284b0e291b368560cc5727d416f1f52577e6505db41b0add9bc1

                      SHA512

                      cdb460848edbc5b8053b0b5211fce7d5f5eb92b347526b3e1d98becbfe1d4f8fb277ac3c58eab64b532f57c4c3b6f5642a9fad04c22f2910eecb0633079fb4ac

                    • C:\Users\Admin\AppData\Local\Temp\1v3DIijE8M.bat

                      Filesize

                      202B

                      MD5

                      dba20628abb0b2e6b95b9bdfea474d95

                      SHA1

                      4b93d475dbc5815ed90c29c3fb830ddb1863c767

                      SHA256

                      1ce39b84b5d6c54dac15a6dd8b047e80f46a7b2eec0f7d229ac13d1285dd62a3

                      SHA512

                      24cff8150ec7c9ab9ecf09c3a8c7d8625a88841465066754aa60629c22160400475aa5041e188d85ef3e9addf1654e7448a02b3f72002955d63a68d79c5ce10b

                    • C:\Users\Admin\AppData\Local\Temp\TbU66uzUwI.bat

                      Filesize

                      202B

                      MD5

                      fb416c9e6af2d4e03e547fd2df8f9348

                      SHA1

                      94edd75dfde5f87c37b5d046b8317b85fc4a9ecc

                      SHA256

                      58c23c39081ac5df29b472ee1ca676be6e6e89901ed80e55ce6f3975834a063b

                      SHA512

                      daa311eba0f5a5583a37120e8ac79e060070d3316dcd59c6783526e7b78543834715c96487bc498b8fc2594bad21ddfcdfea8b37ea866a707704c90bca6cf372

                    • C:\Users\Admin\AppData\Local\Temp\ghJDzcD21F.bat

                      Filesize

                      154B

                      MD5

                      49ae16ab5e6ff0edfe47d24728a03b6d

                      SHA1

                      f3c0e7b9ce3e57578a011b8ee9a35b9f0f6327a6

                      SHA256

                      2ca4e44d9ce6835a990dab5db070aa82916aa66adf4e300822d08eb4220145d1

                      SHA512

                      51ea1ff04162092ed17c2f6a769202afe15e8de3adb12dd834af6004768cdcf1391f4062a3d399621da52edbf55b79b259a3b17eb9baf65857688ad260dca782

                    • C:\Users\Admin\AppData\Local\Temp\oR202sdZsO.bat

                      Filesize

                      202B

                      MD5

                      78c622e0e90c622969b9c100d372cd6d

                      SHA1

                      b9d8103e2f7cfc27ebc8ec99b6d287bd62b3faff

                      SHA256

                      a2d64c26f0d20fb6c9056468403a9467083e81cdd2a7e43ecf33614f32bc73b0

                      SHA512

                      cfdbb3e0639c9969eaf7cd0f828692ae0d1cb2fcdfadfbd22f90d570e3ac46c16d44c69672674289b341485b903a434930080c456b9a6d8cc0d5c89892767800

                    • \Intorefnet\hyperBlockCrtCommon.exe

                      Filesize

                      673KB

                      MD5

                      88475ffcf70bafda27644064bd214f2a

                      SHA1

                      650deb8eee1f3614ff924c2ac5dad5a2f230dce1

                      SHA256

                      f2bd4f56c501098299b88cefecfd79e763d95d801016eaaf4e2707c5ffc7c767

                      SHA512

                      c3e7c4d38d43571fd81926aecf3f0bd75f728f1e7056af02955eed96bea67efd30f295089300df809841c0565a9ea4aa793e2f5c6b93e3eb86132cccc267376f

                    • memory/2704-13-0x0000000000F20000-0x0000000000FCE000-memory.dmp

                      Filesize

                      696KB

                    • memory/2704-15-0x0000000000440000-0x000000000045C000-memory.dmp

                      Filesize

                      112KB

                    • memory/2704-17-0x0000000000460000-0x0000000000478000-memory.dmp

                      Filesize

                      96KB

                    • memory/2840-35-0x0000000001360000-0x000000000140E000-memory.dmp

                      Filesize

                      696KB

                    • memory/2988-68-0x0000000000340000-0x00000000003EE000-memory.dmp

                      Filesize

                      696KB