Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-06-2024 16:49

General

  • Target

    4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c.exe

  • Size

    3.1MB

  • MD5

    35dea5908c411c55232760a766992b4d

  • SHA1

    803e87e294445707b2480e0f6eeb21990be7522e

  • SHA256

    4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c

  • SHA512

    37f37e706d7ba27a00d06f5d30ba881b3cf606a74b0472a404e76acad17e446cf22bdcddbe5b79fa73f457302c028aca46e971a97543d3d1784c2393bff91631

  • SSDEEP

    49152:DvrI22SsaNYfdPBldt698dBcjHCdHLoGdgTHHB72eh2NT:DvU22SsaNYfdPBldt6+dBcjHCdr

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

hvhkcutuoujbobu672-22209.portmap.host:22209

Mutex

979a24d1-1ef3-4416-baf8-bf96d2280aed

Attributes
  • encryption_key

    E634ECEC5FEC379E441CB9B04C771BAC550131B0

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    service 32

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Checks computer location settings 2 TTPs 9 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Executes dropped EXE 10 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 11 IoCs

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

  • Runs ping.exe 1 TTPs 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of SetWindowsHookEx 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\4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c.exe
    "C:\Users\Admin\AppData\Local\Temp\4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3432
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:4592
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4808
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2368
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\DJ7hBtI02Tfb.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2800
        • C:\Windows\system32\chcp.com
          chcp 65001
          4⤵
            PID:2076
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            4⤵
            • Runs ping.exe
            PID:2696
          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
            4⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:4396
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
              5⤵
              • Creates scheduled task(s)
              PID:1296
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\vtk5x93wg5vu.bat" "
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:876
              • C:\Windows\system32\chcp.com
                chcp 65001
                6⤵
                  PID:3928
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  6⤵
                  • Runs ping.exe
                  PID:1408
                • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                  6⤵
                  • Checks computer location settings
                  • Executes dropped EXE
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of WriteProcessMemory
                  PID:3152
                  • C:\Windows\SYSTEM32\schtasks.exe
                    "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                    7⤵
                    • Creates scheduled task(s)
                    PID:2016
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\lA7twf9p5Qth.bat" "
                    7⤵
                    • Suspicious use of WriteProcessMemory
                    PID:4688
                    • C:\Windows\system32\chcp.com
                      chcp 65001
                      8⤵
                        PID:1924
                      • C:\Windows\system32\PING.EXE
                        ping -n 10 localhost
                        8⤵
                        • Runs ping.exe
                        PID:3096
                      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                        8⤵
                        • Checks computer location settings
                        • Executes dropped EXE
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of WriteProcessMemory
                        PID:856
                        • C:\Windows\SYSTEM32\schtasks.exe
                          "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                          9⤵
                          • Creates scheduled task(s)
                          PID:3052
                        • C:\Windows\system32\cmd.exe
                          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\Aey2QCrCwriU.bat" "
                          9⤵
                          • Suspicious use of WriteProcessMemory
                          PID:1320
                          • C:\Windows\system32\chcp.com
                            chcp 65001
                            10⤵
                              PID:1872
                            • C:\Windows\system32\PING.EXE
                              ping -n 10 localhost
                              10⤵
                              • Runs ping.exe
                              PID:4532
                            • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                              "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                              10⤵
                              • Checks computer location settings
                              • Executes dropped EXE
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of WriteProcessMemory
                              PID:2444
                              • C:\Windows\SYSTEM32\schtasks.exe
                                "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                11⤵
                                • Creates scheduled task(s)
                                PID:4924
                              • C:\Windows\system32\cmd.exe
                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\yNBzVCGynMrQ.bat" "
                                11⤵
                                • Suspicious use of WriteProcessMemory
                                PID:4340
                                • C:\Windows\system32\chcp.com
                                  chcp 65001
                                  12⤵
                                    PID:4640
                                  • C:\Windows\system32\PING.EXE
                                    ping -n 10 localhost
                                    12⤵
                                    • Runs ping.exe
                                    PID:2280
                                  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                    12⤵
                                    • Checks computer location settings
                                    • Executes dropped EXE
                                    • Suspicious use of AdjustPrivilegeToken
                                    • Suspicious use of SetWindowsHookEx
                                    • Suspicious use of WriteProcessMemory
                                    PID:2644
                                    • C:\Windows\SYSTEM32\schtasks.exe
                                      "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                      13⤵
                                      • Creates scheduled task(s)
                                      PID:1724
                                    • C:\Windows\system32\cmd.exe
                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\EjSbw0xwjxi4.bat" "
                                      13⤵
                                      • Suspicious use of WriteProcessMemory
                                      PID:2556
                                      • C:\Windows\system32\chcp.com
                                        chcp 65001
                                        14⤵
                                          PID:4132
                                        • C:\Windows\system32\PING.EXE
                                          ping -n 10 localhost
                                          14⤵
                                          • Runs ping.exe
                                          PID:3980
                                        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                          14⤵
                                          • Checks computer location settings
                                          • Executes dropped EXE
                                          • Suspicious use of AdjustPrivilegeToken
                                          • Suspicious use of SetWindowsHookEx
                                          PID:672
                                          • C:\Windows\SYSTEM32\schtasks.exe
                                            "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                            15⤵
                                            • Creates scheduled task(s)
                                            PID:2840
                                          • C:\Windows\system32\cmd.exe
                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\y0s73wb6u9e4.bat" "
                                            15⤵
                                              PID:4468
                                              • C:\Windows\system32\chcp.com
                                                chcp 65001
                                                16⤵
                                                  PID:4324
                                                • C:\Windows\system32\PING.EXE
                                                  ping -n 10 localhost
                                                  16⤵
                                                  • Runs ping.exe
                                                  PID:2568
                                                • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                  16⤵
                                                  • Checks computer location settings
                                                  • Executes dropped EXE
                                                  • Suspicious use of AdjustPrivilegeToken
                                                  • Suspicious use of SetWindowsHookEx
                                                  PID:4588
                                                  • C:\Windows\SYSTEM32\schtasks.exe
                                                    "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                    17⤵
                                                    • Creates scheduled task(s)
                                                    PID:2332
                                                  • C:\Windows\system32\cmd.exe
                                                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\oiUN5yoj3wPk.bat" "
                                                    17⤵
                                                      PID:2016
                                                      • C:\Windows\system32\chcp.com
                                                        chcp 65001
                                                        18⤵
                                                          PID:2688
                                                        • C:\Windows\system32\PING.EXE
                                                          ping -n 10 localhost
                                                          18⤵
                                                          • Runs ping.exe
                                                          PID:2028
                                                        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                          18⤵
                                                          • Checks computer location settings
                                                          • Executes dropped EXE
                                                          • Suspicious use of AdjustPrivilegeToken
                                                          • Suspicious use of SetWindowsHookEx
                                                          PID:3312
                                                          • C:\Windows\SYSTEM32\schtasks.exe
                                                            "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                            19⤵
                                                            • Creates scheduled task(s)
                                                            PID:4836
                                                          • C:\Windows\system32\cmd.exe
                                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\RzqOTdakS4As.bat" "
                                                            19⤵
                                                              PID:4504
                                                              • C:\Windows\system32\chcp.com
                                                                chcp 65001
                                                                20⤵
                                                                  PID:4944
                                                                • C:\Windows\system32\PING.EXE
                                                                  ping -n 10 localhost
                                                                  20⤵
                                                                  • Runs ping.exe
                                                                  PID:4140
                                                                • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                                  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                                  20⤵
                                                                  • Executes dropped EXE
                                                                  • Suspicious use of AdjustPrivilegeToken
                                                                  • Suspicious use of SetWindowsHookEx
                                                                  PID:2576
                                                                  • C:\Windows\SYSTEM32\schtasks.exe
                                                                    "schtasks" /create /tn "service 32" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                                    21⤵
                                                                    • Creates scheduled task(s)
                                                                    PID:3684

                          Network

                          MITRE ATT&CK Matrix ATT&CK v13

                          Execution

                          Scheduled Task/Job

                          1
                          T1053

                          Persistence

                          Scheduled Task/Job

                          1
                          T1053

                          Privilege Escalation

                          Scheduled Task/Job

                          1
                          T1053

                          Discovery

                          Query Registry

                          2
                          T1012

                          System Information Discovery

                          2
                          T1082

                          Remote System Discovery

                          1
                          T1018

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client.exe.log
                            Filesize

                            2KB

                            MD5

                            8f0271a63446aef01cf2bfc7b7c7976b

                            SHA1

                            b70dad968e1dda14b55ad361b7fd4ef9ab6c06d7

                            SHA256

                            da740d78ae00b72cb3710d1a1256dc6431550965d20afaa65e5d5860a4748e8c

                            SHA512

                            78a403c69f1284b7dd41527019f3eede3512a5e4d439d846eca83557b741ca37bcf56c412f3e577b9dd4cfa5a6d6210961215f14cb271b143f6eb94f69389cf5

                          • C:\Users\Admin\AppData\Local\Temp\Aey2QCrCwriU.bat
                            Filesize

                            207B

                            MD5

                            305ccce0d89fbc5fc1ce4c0ccee6a275

                            SHA1

                            804832257a6af36e49e8d01cd4ae9ee81107ff5c

                            SHA256

                            58f0daef023c56d0c186451cd1b7efd376622223b0c34a89c8c71a302f244525

                            SHA512

                            fcb59270af41c9989b22c04e7e11a1beea82aa72baf799cf2f25f5068c9ca7787a069f80a74f546ceb7105c45c747c066bac3d1a42020d4454132b13948b34f3

                          • C:\Users\Admin\AppData\Local\Temp\DJ7hBtI02Tfb.bat
                            Filesize

                            207B

                            MD5

                            a961639e48687d66c3591424b5569c03

                            SHA1

                            04dc26dd8845f140a30193b124b383abbc066d4c

                            SHA256

                            42efcb3cca4e45c15a718d57fc489075420a59f6fba8441a6917f061e5f20f7f

                            SHA512

                            75ded69c4ac9201c5d5792a93b65622672deef829f242b6605e5a634c80de11d5c5ec07739ca9f345b39948f3bb109924c03744257f33c02781f3dd7c7952fdf

                          • C:\Users\Admin\AppData\Local\Temp\EjSbw0xwjxi4.bat
                            Filesize

                            207B

                            MD5

                            6c843d02009a7eb137b1a2d8d72dccce

                            SHA1

                            64ce227be1ce5443407a61858a7f0f0987153107

                            SHA256

                            74f87f38314607170b04a273fd823404a57decdf49513b3525bfa80b08444cbd

                            SHA512

                            07bc8bbc37ae702b89780c3dfb929b4a72fee622fba9ed38aaaaf9c56095a38c78da945e064d97dbba8d947011e25ff808ef7a5a5a37582a3d4689cb4c48b01f

                          • C:\Users\Admin\AppData\Local\Temp\RzqOTdakS4As.bat
                            Filesize

                            207B

                            MD5

                            1839e68f43ca727824318602324900c7

                            SHA1

                            4253ab3fc67b8c9ac3010aa85c18e2de0d15f5af

                            SHA256

                            5a382c51fa8279c5b47686414fe08ccf9d497c137de69d020b89d3b43034e5a2

                            SHA512

                            2838b3fdd152f032116cdd23a39592d3e8c978e99f367e7b50a2e19fdf3126448e6fa9fe17b56a8cec7fd663152913822d4bd8be142662c7706df4ab6e46ad83

                          • C:\Users\Admin\AppData\Local\Temp\lA7twf9p5Qth.bat
                            Filesize

                            207B

                            MD5

                            bada6bfcbe24d6f7e30492927b5fbfac

                            SHA1

                            8cea3dc401e7787d105529842a8e7d83e20c89d4

                            SHA256

                            8c658d6db7c413c124017429002d0366ec0b2ba71062debed4ecae7ac5ca8243

                            SHA512

                            856c89ff637309d6977fbf69578bd40b1ee976bcef09f90c0432c9c08b5c50fd1b67e1a14ddbccd4e0097b1906a37d5f00a5cb7295340115b19ee242981c0836

                          • C:\Users\Admin\AppData\Local\Temp\oiUN5yoj3wPk.bat
                            Filesize

                            207B

                            MD5

                            61a5c1351b9065b7842771cb25e1b533

                            SHA1

                            6ed216fae7e000f0a1914c4d4fbc148e6dbbbeba

                            SHA256

                            6a3db3c983eedf8fca656dccc618278d858eb08ef0bd719892afcc86964681ba

                            SHA512

                            2111cedc4d2f477b2757c0508025dcc069399e0b4aec3259aaf3b90f1e2a689f8f0ad2033b71b87362b3d05cbb13d5eb65750e92812b7ae17d88bc01c8334226

                          • C:\Users\Admin\AppData\Local\Temp\vtk5x93wg5vu.bat
                            Filesize

                            207B

                            MD5

                            927cdbd73a17430f701afc890939211c

                            SHA1

                            a0de16c6ca3c5300c50c1b44bc03c18bd3d16d19

                            SHA256

                            f20a4e273c126b1dab7e50f4e49f04ab326160ae10c368c2988ba961570e5bdc

                            SHA512

                            75dbc07091e8ba7087c698ecbdb56bc1e34e03b7e51788e6102d24a4cefb88999c6dc07bbde889f3d8dc408bba3e4178b3558e5c8fb0e6092fd8cb40a25f714d

                          • C:\Users\Admin\AppData\Local\Temp\y0s73wb6u9e4.bat
                            Filesize

                            207B

                            MD5

                            0bbcaac201b5d5d2af35935315b37d8b

                            SHA1

                            d779b938cf67078d3f476cbbbef1cadfb8f144e0

                            SHA256

                            3ac6627b9e3c02a71240ee2a596a727aceeb95390905360c12c23a5bc962a6ec

                            SHA512

                            f98415d8d58721591c5b73dc0eedca5c5c5d0c8cc55cf7d4067ba50bcb6a0376f0ae03f51b2412b80a8babeda141ddea8ef7c4f7b7ac86139d4d77fbfab47b62

                          • C:\Users\Admin\AppData\Local\Temp\yNBzVCGynMrQ.bat
                            Filesize

                            207B

                            MD5

                            00a8eef0e60aaebc075ca28ea1cc860a

                            SHA1

                            0de8d72216bc60a124bd2d8ee07b4e198ce203b9

                            SHA256

                            4c78a3971f131a3763f4a7da0346c327d7cf56abe72f6cc9e536d1d19577c471

                            SHA512

                            2254c1668777df79bd46e974bdd3d76139cc4c8746452eacb5906d2ce86bf5ad43a88b49d0874403d190998ce92fb69e35cb7780ea57b672797490b231a1990f

                          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                            Filesize

                            3.1MB

                            MD5

                            35dea5908c411c55232760a766992b4d

                            SHA1

                            803e87e294445707b2480e0f6eeb21990be7522e

                            SHA256

                            4833f6e7b2beb3821ccd544a936f3d6db6403ee58c05038f15f2d1544f2acd3c

                            SHA512

                            37f37e706d7ba27a00d06f5d30ba881b3cf606a74b0472a404e76acad17e446cf22bdcddbe5b79fa73f457302c028aca46e971a97543d3d1784c2393bff91631

                          • memory/3432-9-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmp
                            Filesize

                            10.8MB

                          • memory/3432-0-0x00007FFF5E983000-0x00007FFF5E985000-memory.dmp
                            Filesize

                            8KB

                          • memory/3432-2-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmp
                            Filesize

                            10.8MB

                          • memory/3432-1-0x0000000000590000-0x00000000008B4000-memory.dmp
                            Filesize

                            3.1MB

                          • memory/4808-18-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmp
                            Filesize

                            10.8MB

                          • memory/4808-13-0x000000001D090000-0x000000001D142000-memory.dmp
                            Filesize

                            712KB

                          • memory/4808-12-0x000000001CF80000-0x000000001CFD0000-memory.dmp
                            Filesize

                            320KB

                          • memory/4808-11-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmp
                            Filesize

                            10.8MB

                          • memory/4808-10-0x00007FFF5E980000-0x00007FFF5F441000-memory.dmp
                            Filesize

                            10.8MB