Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23/06/2024, 07:14

General

  • Target
    Client-built.exe
  • Size 3.1MB
  • Sample240623-h2yqystemc
  • SHA256 ce69ec958fdaf36bbfca7e3aa5135927de730ff9dab62da97e112eae60646967
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • hi

C2
  • care-somewhere.gl.at.ply.gg:38177

Mutex
  • 1e96fc68-3845-4d50-9a21-431f60029a14

Attributes
  • encryption_key

    D9185A099F336661ED8D6035D739C63B5B34E3D8

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Update

  • 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).

  • Runs ping.exe 1 TTPs 9 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 11 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 11 IoCs
  • Suspicious use of FindShellTrayWindow 10 IoCs
  • Suspicious use of SendNotifyMessage 10 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\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4864
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:1532
    • 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 FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:644
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3580
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\OYaXzaNtQ11P.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:1560
        • C:\Windows\system32\chcp.com
          chcp 65001
          4⤵
            PID:3084
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            4⤵
            • Runs ping.exe
            PID:4320
          • 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 FindShellTrayWindow
            • Suspicious use of SendNotifyMessage
            • Suspicious use of WriteProcessMemory
            PID:4668
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
              5⤵
              • Scheduled Task/Job: Scheduled Task
              PID:3380
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tdRefHUvxq1d.bat" "
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:2724
              • C:\Windows\system32\chcp.com
                chcp 65001
                6⤵
                  PID:4124
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  6⤵
                  • Runs ping.exe
                  PID:1756
                • 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 FindShellTrayWindow
                  • Suspicious use of SendNotifyMessage
                  • Suspicious use of WriteProcessMemory
                  PID:2180
                  • C:\Windows\SYSTEM32\schtasks.exe
                    "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                    7⤵
                    • Scheduled Task/Job: Scheduled Task
                    PID:2796
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\sskeTAfrJjvE.bat" "
                    7⤵
                    • Suspicious use of WriteProcessMemory
                    PID:2104
                    • C:\Windows\system32\chcp.com
                      chcp 65001
                      8⤵
                        PID:3932
                      • C:\Windows\system32\PING.EXE
                        ping -n 10 localhost
                        8⤵
                        • Runs ping.exe
                        PID:1072
                      • 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 FindShellTrayWindow
                        • Suspicious use of SendNotifyMessage
                        • Suspicious use of WriteProcessMemory
                        PID:1972
                        • C:\Windows\SYSTEM32\schtasks.exe
                          "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                          9⤵
                          • Scheduled Task/Job: Scheduled Task
                          PID:3060
                        • C:\Windows\system32\cmd.exe
                          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\E24xDLwisnsK.bat" "
                          9⤵
                          • Suspicious use of WriteProcessMemory
                          PID:3400
                          • C:\Windows\system32\chcp.com
                            chcp 65001
                            10⤵
                              PID:2004
                            • C:\Windows\system32\PING.EXE
                              ping -n 10 localhost
                              10⤵
                              • Runs ping.exe
                              PID:628
                            • 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 FindShellTrayWindow
                              • Suspicious use of SendNotifyMessage
                              • Suspicious use of WriteProcessMemory
                              PID:2280
                              • C:\Windows\SYSTEM32\schtasks.exe
                                "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                11⤵
                                • Scheduled Task/Job: Scheduled Task
                                PID:224
                              • C:\Windows\system32\cmd.exe
                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\Ex3EJqHXwaP3.bat" "
                                11⤵
                                • Suspicious use of WriteProcessMemory
                                PID:2968
                                • C:\Windows\system32\chcp.com
                                  chcp 65001
                                  12⤵
                                    PID:2440
                                  • C:\Windows\system32\PING.EXE
                                    ping -n 10 localhost
                                    12⤵
                                    • Runs ping.exe
                                    PID:4868
                                  • 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 FindShellTrayWindow
                                    • Suspicious use of SendNotifyMessage
                                    • Suspicious use of SetWindowsHookEx
                                    • Suspicious use of WriteProcessMemory
                                    PID:2244
                                    • C:\Windows\SYSTEM32\schtasks.exe
                                      "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                      13⤵
                                      • Scheduled Task/Job: Scheduled Task
                                      PID:3972
                                    • C:\Windows\system32\cmd.exe
                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\TJlB200zb6yb.bat" "
                                      13⤵
                                      • Suspicious use of WriteProcessMemory
                                      PID:2260
                                      • C:\Windows\system32\chcp.com
                                        chcp 65001
                                        14⤵
                                          PID:4508
                                        • C:\Windows\system32\PING.EXE
                                          ping -n 10 localhost
                                          14⤵
                                          • Runs ping.exe
                                          PID:5104
                                        • 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 FindShellTrayWindow
                                          • Suspicious use of SendNotifyMessage
                                          • Suspicious use of SetWindowsHookEx
                                          PID:4168
                                          • C:\Windows\SYSTEM32\schtasks.exe
                                            "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                            15⤵
                                            • Scheduled Task/Job: Scheduled Task
                                            PID:1612
                                          • C:\Windows\system32\cmd.exe
                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\2WBpuVUMfeYM.bat" "
                                            15⤵
                                              PID:3012
                                              • C:\Windows\system32\chcp.com
                                                chcp 65001
                                                16⤵
                                                  PID:3448
                                                • C:\Windows\system32\PING.EXE
                                                  ping -n 10 localhost
                                                  16⤵
                                                  • Runs ping.exe
                                                  PID:3880
                                                • 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 FindShellTrayWindow
                                                  • Suspicious use of SendNotifyMessage
                                                  • Suspicious use of SetWindowsHookEx
                                                  PID:1236
                                                  • C:\Windows\SYSTEM32\schtasks.exe
                                                    "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                    17⤵
                                                    • Scheduled Task/Job: Scheduled Task
                                                    PID:3380
                                                  • C:\Windows\system32\cmd.exe
                                                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ajem7dlfe7fK.bat" "
                                                    17⤵
                                                      PID:4976
                                                      • C:\Windows\system32\chcp.com
                                                        chcp 65001
                                                        18⤵
                                                          PID:2240
                                                        • C:\Windows\system32\PING.EXE
                                                          ping -n 10 localhost
                                                          18⤵
                                                          • Runs ping.exe
                                                          PID:4108
                                                        • 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 FindShellTrayWindow
                                                          • Suspicious use of SendNotifyMessage
                                                          • Suspicious use of SetWindowsHookEx
                                                          PID:3356
                                                          • C:\Windows\SYSTEM32\schtasks.exe
                                                            "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                            19⤵
                                                            • Scheduled Task/Job: Scheduled Task
                                                            PID:3932
                                                          • C:\Windows\system32\cmd.exe
                                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\51fWUMLbE8vM.bat" "
                                                            19⤵
                                                              PID:2456
                                                              • C:\Windows\system32\chcp.com
                                                                chcp 65001
                                                                20⤵
                                                                  PID:2052
                                                                • C:\Windows\system32\PING.EXE
                                                                  ping -n 10 localhost
                                                                  20⤵
                                                                  • Runs ping.exe
                                                                  PID:2496
                                                                • 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 FindShellTrayWindow
                                                                  • Suspicious use of SendNotifyMessage
                                                                  • Suspicious use of SetWindowsHookEx
                                                                  PID:4316
                                                                  • C:\Windows\SYSTEM32\schtasks.exe
                                                                    "schtasks" /create /tn "Update" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                                    21⤵
                                                                    • Scheduled Task/Job: Scheduled Task
                                                                    PID:3224

                          Network

                                MITRE ATT&CK Enterprise v15

                                Replay Monitor

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                                Downloads

                                Client.exe.log

                                • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client.exe.log
                                • Size 2KB
                                • SHA256 da740d78ae00b72cb3710d1a1256dc6431550965d20afaa65e5d5860a4748e8c
                                • MD5 SHA1 SHA512

                                2WBpuVUMfeYM.bat

                                • Path C:\Users\Admin\AppData\Local\Temp\2WBpuVUMfeYM.bat
                                • Size 207B
                                • SHA256 00817139637dcf02591f4c6efe2de0ac9c914c8b228cf9765491bbcbce2c88c1
                                • MD5 SHA1 SHA512

                                51fWUMLbE8vM.bat

                                • Path C:\Users\Admin\AppData\Local\Temp\51fWUMLbE8vM.bat
                                • Size 207B
                                • SHA256 10af8fb1bb3cfbee88e3451727684ac75bccd49271c2d8881d2493e9540fb557
                                • MD5 SHA1 SHA512

                                E24xDLwisnsK.bat

                                • Path C:\Users\Admin\AppData\Local\Temp\E24xDLwisnsK.bat
                                • Size 207B
                                • SHA256 ec0298cfc44bd11c67b028e6239aaac58a823d65c3ffd247d34b754d77e8a31f
                                • MD5 SHA1 SHA512

                                Ex3EJqHXwaP3.bat

                                • Path C:\Users\Admin\AppData\Local\Temp\Ex3EJqHXwaP3.bat
                                • Size 207B
                                • SHA256 e88c464ffdbb89796e19cf9350431aea3079f69be175d630e4c672e9f32b4173
                                • MD5 SHA1 SHA512

                                OYaXzaNtQ11P.bat

                                • Path C:\Users\Admin\AppData\Local\Temp\OYaXzaNtQ11P.bat
                                • Size 207B
                                • SHA256 316e34122d76a2bae246413bf2dee4825a406a5864daeaf3a883cef50a8d9754
                                • MD5 SHA1 SHA512

                                TJlB200zb6yb.bat

                                • Path C:\Users\Admin\AppData\Local\Temp\TJlB200zb6yb.bat
                                • Size 207B
                                • SHA256 a316057427ac349323145c890c7a5e24b0134e42eb18a7839a3de2f78f144e1b
                                • MD5 SHA1 SHA512

                                ajem7dlfe7fK.bat

                                • Path C:\Users\Admin\AppData\Local\Temp\ajem7dlfe7fK.bat
                                • Size 207B
                                • SHA256 3d3a318890207702ae6484918344028bc70d35ab770f827e1d9d91cd303c6e34
                                • MD5 SHA1 SHA512

                                sskeTAfrJjvE.bat

                                • Path C:\Users\Admin\AppData\Local\Temp\sskeTAfrJjvE.bat
                                • Size 207B
                                • SHA256 5f664371fea73212fd54c633b8a05fc56bd0e0d279b271108d7f7d0eb28623c5
                                • MD5 SHA1 SHA512

                                tdRefHUvxq1d.bat

                                • Path C:\Users\Admin\AppData\Local\Temp\tdRefHUvxq1d.bat
                                • Size 207B
                                • SHA256 c3c0d08ee9effc09dbe82df2e7ff9529c02ccc85b0df69ad7da7a1d3d0f2349f
                                • MD5 SHA1 SHA512

                                Client.exe

                                • Path C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                • Size 3.1MB
                                • SHA256 ce69ec958fdaf36bbfca7e3aa5135927de730ff9dab62da97e112eae60646967
                                • MD5 SHA1 SHA512 SSDEEP

                                memory/644-17-0x00007FFD4F1B0000-0x00007FFD4FC71000-memory.dmp

                                memory/644-9-0x00007FFD4F1B0000-0x00007FFD4FC71000-memory.dmp

                                memory/644-10-0x00007FFD4F1B0000-0x00007FFD4FC71000-memory.dmp

                                memory/644-12-0x000000001E120000-0x000000001E1D2000-memory.dmp

                                memory/644-11-0x000000001E010000-0x000000001E060000-memory.dmp

                                memory/4864-8-0x00007FFD4F1B0000-0x00007FFD4FC71000-memory.dmp

                                memory/4864-0-0x00007FFD4F1B3000-0x00007FFD4F1B5000-memory.dmp

                                memory/4864-2-0x00007FFD4F1B0000-0x00007FFD4FC71000-memory.dmp

                                memory/4864-1-0x0000000000290000-0x00000000005B4000-memory.dmp