Analysis

  • max time kernel
    147s
  • max time network
    148s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    01-12-2024 13:14

General

  • Target

    7b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945.exe

  • Size

    1.8MB

  • MD5

    4f964ada28fa2dde5c75d3c3682e69c4

  • SHA1

    481a0ddc3dfd39147abf684b60b6a0b1dfbbc341

  • SHA256

    7b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945

  • SHA512

    ab07c9602776dc062599a89eed9d38be2c95f563a9ed9c906e6c1066f80e5666f119c5a790a120bf626a73edd3cc178924262d41c0f65eb20fcf3b542a83dc68

  • SSDEEP

    24576:cWrCg/r+6/5OZr1A+KnhQaPNcHxIpjgqJ6t1:XrC7G5g0gq

Malware Config

Signatures

  • DcRat

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

  • Dcrat family
  • Modifies WinLogon for persistence 2 TTPs 1 IoCs
  • Process spawned unexpected child process 3 IoCs

    This typically indicates the parent process was compromised via an exploit or macro.

  • DCRat payload 4 IoCs
  • Executes dropped EXE 5 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Drops file in System32 directory 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 3 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 3 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 3 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\7b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945.exe
    "C:\Users\Admin\AppData\Local\Temp\7b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945.exe"
    1⤵
    • Modifies WinLogon for persistence
    • Adds Run key to start application
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2488
    • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe
      "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\Admin\AppData\Local\Temp\3hpd3qqa\3hpd3qqa.cmdline"
      2⤵
      • Drops file in System32 directory
      • Suspicious use of WriteProcessMemory
      PID:2564
      • C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\Admin\AppData\Local\Temp\RESE09F.tmp" "c:\Windows\System32\CSC5519532ADFA34466AD302D42A5A3A84.TMP"
        3⤵
          PID:1316
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\ToEuusmL27.bat"
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2600
        • C:\Windows\system32\chcp.com
          chcp 65001
          3⤵
            PID:2988
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            3⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:2164
          • C:\Users\Admin\AppData\Local\updater.exe
            "C:\Users\Admin\AppData\Local\updater.exe"
            3⤵
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:2856
            • C:\Windows\System32\cmd.exe
              "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\cRBFrjfuSR.bat"
              4⤵
              • Suspicious use of WriteProcessMemory
              PID:3036
              • C:\Windows\system32\chcp.com
                chcp 65001
                5⤵
                  PID:2132
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  5⤵
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Runs ping.exe
                  PID:2300
                • C:\Users\Admin\AppData\Local\updater.exe
                  "C:\Users\Admin\AppData\Local\updater.exe"
                  5⤵
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:2632
                  • C:\Windows\System32\cmd.exe
                    "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\9VsmEYMPZS.bat"
                    6⤵
                    • Suspicious use of WriteProcessMemory
                    PID:872
                    • C:\Windows\system32\chcp.com
                      chcp 65001
                      7⤵
                        PID:2152
                      • C:\Windows\system32\w32tm.exe
                        w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                        7⤵
                          PID:1808
                        • C:\Users\Admin\AppData\Local\updater.exe
                          "C:\Users\Admin\AppData\Local\updater.exe"
                          7⤵
                          • Executes dropped EXE
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:2168
                          • C:\Windows\System32\cmd.exe
                            "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\zjPPW8Mczj.bat"
                            8⤵
                            • Suspicious use of WriteProcessMemory
                            PID:1400
                            • C:\Windows\system32\chcp.com
                              chcp 65001
                              9⤵
                                PID:2044
                              • C:\Windows\system32\PING.EXE
                                ping -n 10 localhost
                                9⤵
                                • System Network Configuration Discovery: Internet Connection Discovery
                                • Runs ping.exe
                                PID:1996
                              • C:\Users\Admin\AppData\Local\updater.exe
                                "C:\Users\Admin\AppData\Local\updater.exe"
                                9⤵
                                • Executes dropped EXE
                                • Suspicious use of AdjustPrivilegeToken
                                • Suspicious use of WriteProcessMemory
                                PID:2804
                                • C:\Windows\System32\cmd.exe
                                  "C:\Windows\System32\cmd.exe" /C "C:\Users\Admin\AppData\Local\Temp\9rsY8ZYMRr.bat"
                                  10⤵
                                  • Suspicious use of WriteProcessMemory
                                  PID:1716
                                  • C:\Windows\system32\chcp.com
                                    chcp 65001
                                    11⤵
                                      PID:3000
                                    • C:\Windows\system32\w32tm.exe
                                      w32tm /stripchart /computer:localhost /period:5 /dataonly /samples:2
                                      11⤵
                                        PID:1960
                                      • C:\Users\Admin\AppData\Local\updater.exe
                                        "C:\Users\Admin\AppData\Local\updater.exe"
                                        11⤵
                                        • Executes dropped EXE
                                        • Suspicious use of AdjustPrivilegeToken
                                        PID:2852
                  • C:\Windows\system32\schtasks.exe
                    schtasks.exe /create /tn "updateru" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\AppData\Local\updater.exe'" /f
                    1⤵
                    • Process spawned unexpected child process
                    • Scheduled Task/Job: Scheduled Task
                    PID:2660
                  • C:\Windows\system32\schtasks.exe
                    schtasks.exe /create /tn "updater" /sc ONLOGON /tr "'C:\Users\Admin\AppData\Local\updater.exe'" /rl HIGHEST /f
                    1⤵
                    • Process spawned unexpected child process
                    • Scheduled Task/Job: Scheduled Task
                    PID:2236
                  • C:\Windows\system32\schtasks.exe
                    schtasks.exe /create /tn "updateru" /sc MINUTE /mo 9 /tr "'C:\Users\Admin\AppData\Local\updater.exe'" /rl HIGHEST /f
                    1⤵
                    • Process spawned unexpected child process
                    • Scheduled Task/Job: Scheduled Task
                    PID:2696

                  Network

                  MITRE ATT&CK Enterprise v15

                  Replay Monitor

                  Loading Replay Monitor...

                  Downloads

                  • C:\Users\Admin\AppData\Local\Temp\9VsmEYMPZS.bat

                    Filesize

                    216B

                    MD5

                    b64fbc7faf164210c3a5ee089dc99aa1

                    SHA1

                    ebf96319c706d8527acb92f0c7e4f97e0ac21fb6

                    SHA256

                    2b292215f55754d97930ef0fc5494254a2aa2845f819b727dc01aff452b47ff4

                    SHA512

                    c181cca7c26913798403ab76accc8975b42175a939cdc0058e8f5ddb700218ac41df28dced2b4157a0b34011bc43304491a75ada27027f95301c0d325e4feb81

                  • C:\Users\Admin\AppData\Local\Temp\9rsY8ZYMRr.bat

                    Filesize

                    216B

                    MD5

                    629b149a00bf91ee7625921f85e08777

                    SHA1

                    05999eec12d3d76d0142a905d7f68e946b51b551

                    SHA256

                    cda2886ecef25e5b2295862e2217e349c5e08e56da5c6bdc2aeeaabe843cc5d4

                    SHA512

                    ee6145a76c89f4433f53603235cba2017b1fab9c013730bc13a4c377ea96e8ce2d15275cd144a4127159c5fa7bbb8c5c824bcbdeddb55abdd948ef4615f0a8ff

                  • C:\Users\Admin\AppData\Local\Temp\RESE09F.tmp

                    Filesize

                    1KB

                    MD5

                    b3af9574e79e6b2adaf676426643ab02

                    SHA1

                    e17f81c37f4149ddeb7cacc9ddd57e0e4b0e576c

                    SHA256

                    a918df87eb6737254ba2c5d29b6a3ee4724b4f7227d8e27e33cc48ed0f4d4712

                    SHA512

                    2b27e66b0ea52aac7ecd6e7ecaef025d5f374553398feb49f592777ac5331ea2c15c3aec2abceb0aebf74ec42ea6da165ca28b9704f8d32bfd71968d56e5fe87

                  • C:\Users\Admin\AppData\Local\Temp\ToEuusmL27.bat

                    Filesize

                    168B

                    MD5

                    32be291bbb59f87ee58e1aea1540381d

                    SHA1

                    6d3d4376f7cd869bd827ad646e4943289f7903b2

                    SHA256

                    188343f81b2347413e4593e755ef75dc23c227d4a29809254231ea0a84fc6f92

                    SHA512

                    0497916c25597a82b6496e243f9befe4c07948e96c8dcdc76342068b4db1c249fb6c22f29935ae2b73447e0af1240bb71cd71d74b73df9115ae8ea95a6d6d578

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

                    Filesize

                    168B

                    MD5

                    439952e47e4370c91a6f092651cbb058

                    SHA1

                    8b02cf0689872f119af7bca2a0e38a3fb6a1a6e8

                    SHA256

                    33c7e224d9bbf8a956881d3f832a70aab6a38700f27dd1a655fc6a31323c47b2

                    SHA512

                    8857966bc8f433bdce0d2b85ef6d73cb0d12084b97bb9dec897c9cf3722f2a993d0a1ee78d7cc6275a7391ab63d0ffa6b5c29b4429195023efe90fe7b1277ba0

                  • C:\Users\Admin\AppData\Local\Temp\zjPPW8Mczj.bat

                    Filesize

                    168B

                    MD5

                    1715dc3983d4db7edc7cc2cd344e9bfb

                    SHA1

                    c88c4e41900a849d9736080d630f09d7786b1118

                    SHA256

                    626ea650662881f5afbacd8828df74dc14ee460b703c4962a5ec1d5ba59783b8

                    SHA512

                    8cb96e0f98e172712beccc2b1ce389f721a5a9ad824304336ff086c1ad9951d774eba48ff6d60692ffce84b388992609fa476b95294cc9007119f03d680ba501

                  • C:\Users\Admin\AppData\Local\updater.exe

                    Filesize

                    1.8MB

                    MD5

                    4f964ada28fa2dde5c75d3c3682e69c4

                    SHA1

                    481a0ddc3dfd39147abf684b60b6a0b1dfbbc341

                    SHA256

                    7b0699fb946ce952624a3d5807839fb1a0613993270aca8227f35001b790b945

                    SHA512

                    ab07c9602776dc062599a89eed9d38be2c95f563a9ed9c906e6c1066f80e5666f119c5a790a120bf626a73edd3cc178924262d41c0f65eb20fcf3b542a83dc68

                  • \??\c:\Users\Admin\AppData\Local\Temp\3hpd3qqa\3hpd3qqa.0.cs

                    Filesize

                    372B

                    MD5

                    2d7c234d04b7a328c944fcadfcdd5df7

                    SHA1

                    d9cad48a8fc5ee8c02970b6487ee41edd051df68

                    SHA256

                    d2e3a5f98b9fa3ec14c58e77d7cdff2e653dfaa41fa336f0f79e131b62589891

                    SHA512

                    add2eb8ebb480ad8bd1b9bfaf43ea20c512f910f3f0cd9fd462aaeffba7179cab6f5b14e6a8e0b3c8625a3d5b1f74f773317542012d8895861d1e79bb285a58e

                  • \??\c:\Users\Admin\AppData\Local\Temp\3hpd3qqa\3hpd3qqa.cmdline

                    Filesize

                    235B

                    MD5

                    1fe26c7afccbb9daaba7a8eba5207f05

                    SHA1

                    b48e5c6d0fe7b8caab02543343e7b60aae08cc54

                    SHA256

                    aec9b6451e12413d953e7540abbe613e526a300862dc1f87983d616dfc992864

                    SHA512

                    1bb6f660a8c066be483ee376a7bba19706cd696848ce40e14279904f4c22b0dce744cb98258c132e8807b53c8ed4f42fe95084b5757522b20513f1604213981c

                  • \??\c:\Windows\System32\CSC5519532ADFA34466AD302D42A5A3A84.TMP

                    Filesize

                    1KB

                    MD5

                    dcd286f3a69cfd0292a8edbc946f8553

                    SHA1

                    4d347ac1e8c1d75fc139878f5646d3a0b083ef17

                    SHA256

                    29e03364271673f4b388131b7773d016df859bb0b1c5e6c3ad6914a632600596

                    SHA512

                    4b9546033bd4957263854fbb0a87aa1d57ce3afbce7bf03b12b05b78f97c5a27c52c1d73e34b6a5ba2c395e26ec9c474a32609441b99cf78ea707113fca96f77

                  • memory/2488-12-0x0000000000430000-0x000000000043E000-memory.dmp

                    Filesize

                    56KB

                  • memory/2488-14-0x0000000000570000-0x0000000000582000-memory.dmp

                    Filesize

                    72KB

                  • memory/2488-19-0x0000000000440000-0x000000000044E000-memory.dmp

                    Filesize

                    56KB

                  • memory/2488-21-0x0000000000450000-0x0000000000460000-memory.dmp

                    Filesize

                    64KB

                  • memory/2488-22-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2488-24-0x0000000000C00000-0x0000000000C5A000-memory.dmp

                    Filesize

                    360KB

                  • memory/2488-26-0x00000000005C0000-0x00000000005CE000-memory.dmp

                    Filesize

                    56KB

                  • memory/2488-28-0x0000000000D00000-0x0000000000D4E000-memory.dmp

                    Filesize

                    312KB

                  • memory/2488-29-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2488-16-0x0000000000590000-0x00000000005A6000-memory.dmp

                    Filesize

                    88KB

                  • memory/2488-37-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2488-17-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2488-38-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2488-0-0x000007FEF5873000-0x000007FEF5874000-memory.dmp

                    Filesize

                    4KB

                  • memory/2488-10-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2488-50-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2488-9-0x0000000000550000-0x0000000000568000-memory.dmp

                    Filesize

                    96KB

                  • memory/2488-7-0x0000000000410000-0x000000000042C000-memory.dmp

                    Filesize

                    112KB

                  • memory/2488-1-0x0000000000DB0000-0x0000000000F7A000-memory.dmp

                    Filesize

                    1.8MB

                  • memory/2488-6-0x0000000000430000-0x000000000044C000-memory.dmp

                    Filesize

                    112KB

                  • memory/2488-2-0x000007FEF5870000-0x000007FEF625C000-memory.dmp

                    Filesize

                    9.9MB

                  • memory/2488-4-0x0000000000200000-0x000000000020E000-memory.dmp

                    Filesize

                    56KB

                  • memory/2632-72-0x0000000000EB0000-0x000000000107A000-memory.dmp

                    Filesize

                    1.8MB

                  • memory/2856-54-0x0000000000050000-0x000000000021A000-memory.dmp

                    Filesize

                    1.8MB