Analysis

  • max time kernel
    149s
  • max time network
    157s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240704-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240704-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/07/2024, 19:07

General

  • Target
    84e33e3232dc792f6333dd8ebfbcab0f4c75bf3593d58a57e424fc30e84759a7.exe
  • Size 502KB
  • Sample240727-xsmpnatdmk
  • SHA256 84e33e3232dc792f6333dd8ebfbcab0f4c75bf3593d58a57e424fc30e84759a7
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.0

Botnet
  • Office04

C2
  • me:4782

  • 68.201.205.56:4782

Mutex
  • 4e19accb-bc80-45aa-917d-d5dca33ad8f0

Attributes
  • encryption_key

    3B611D04AAFAB02940B8BD5BC8618AF575293F55

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    2996

  • startup_key

    system

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Checks computer location settings 2 TTPs 11 IoCs

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

  • Executes dropped EXE 11 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 11 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 11 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 12 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 12 IoCs
  • Suspicious use of FindShellTrayWindow 11 IoCs
  • Suspicious use of SendNotifyMessage 11 IoCs
  • Suspicious use of SetWindowsHookEx 11 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\84e33e3232dc792f6333dd8ebfbcab0f4c75bf3593d58a57e424fc30e84759a7.exe
    "C:\Users\Admin\AppData\Local\Temp\84e33e3232dc792f6333dd8ebfbcab0f4c75bf3593d58a57e424fc30e84759a7.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:820
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Users\Admin\AppData\Local\Temp\84e33e3232dc792f6333dd8ebfbcab0f4c75bf3593d58a57e424fc30e84759a7.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:4528
    • C:\Windows\system32\SubDir\Client.exe
      "C:\Windows\system32\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:1600
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:372
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\67l05jYVpqrJ.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:812
        • C:\Windows\system32\chcp.com
          chcp 65001
          4⤵
            PID:4692
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            4⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:4392
          • C:\Windows\system32\SubDir\Client.exe
            "C:\Windows\system32\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 SetWindowsHookEx
            • Suspicious use of WriteProcessMemory
            PID:768
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
              5⤵
              • Scheduled Task/Job: Scheduled Task
              PID:2004
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ljASEiJZGQCC.bat" "
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:1424
              • C:\Windows\system32\chcp.com
                chcp 65001
                6⤵
                  PID:3596
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  6⤵
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Runs ping.exe
                  PID:1960
                • C:\Windows\system32\SubDir\Client.exe
                  "C:\Windows\system32\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 SetWindowsHookEx
                  • Suspicious use of WriteProcessMemory
                  PID:2612
                  • C:\Windows\SYSTEM32\schtasks.exe
                    "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                    7⤵
                    • Scheduled Task/Job: Scheduled Task
                    PID:3132
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\cBehnxJBnpNT.bat" "
                    7⤵
                    • Suspicious use of WriteProcessMemory
                    PID:1328
                    • C:\Windows\system32\chcp.com
                      chcp 65001
                      8⤵
                        PID:556
                      • C:\Windows\system32\PING.EXE
                        ping -n 10 localhost
                        8⤵
                        • System Network Configuration Discovery: Internet Connection Discovery
                        • Runs ping.exe
                        PID:3764
                      • C:\Windows\system32\SubDir\Client.exe
                        "C:\Windows\system32\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 SetWindowsHookEx
                        • Suspicious use of WriteProcessMemory
                        PID:3020
                        • C:\Windows\SYSTEM32\schtasks.exe
                          "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                          9⤵
                          • Scheduled Task/Job: Scheduled Task
                          PID:1384
                        • C:\Windows\system32\cmd.exe
                          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\8quIcYhNq76Z.bat" "
                          9⤵
                          • Suspicious use of WriteProcessMemory
                          PID:3864
                          • C:\Windows\system32\chcp.com
                            chcp 65001
                            10⤵
                              PID:2200
                            • C:\Windows\system32\PING.EXE
                              ping -n 10 localhost
                              10⤵
                              • System Network Configuration Discovery: Internet Connection Discovery
                              • Runs ping.exe
                              PID:4312
                            • C:\Windows\system32\SubDir\Client.exe
                              "C:\Windows\system32\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 SetWindowsHookEx
                              • Suspicious use of WriteProcessMemory
                              PID:4604
                              • C:\Windows\SYSTEM32\schtasks.exe
                                "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                11⤵
                                • Scheduled Task/Job: Scheduled Task
                                PID:3316
                              • C:\Windows\system32\cmd.exe
                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\16rWPrJkI3uc.bat" "
                                11⤵
                                • Suspicious use of WriteProcessMemory
                                PID:3424
                                • C:\Windows\system32\chcp.com
                                  chcp 65001
                                  12⤵
                                    PID:4800
                                  • C:\Windows\system32\PING.EXE
                                    ping -n 10 localhost
                                    12⤵
                                    • System Network Configuration Discovery: Internet Connection Discovery
                                    • Runs ping.exe
                                    PID:3604
                                  • C:\Windows\system32\SubDir\Client.exe
                                    "C:\Windows\system32\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:4860
                                    • C:\Windows\SYSTEM32\schtasks.exe
                                      "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                      13⤵
                                      • Scheduled Task/Job: Scheduled Task
                                      PID:3428
                                    • C:\Windows\system32\cmd.exe
                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tjfXSf7VY5Vz.bat" "
                                      13⤵
                                      • Suspicious use of WriteProcessMemory
                                      PID:2020
                                      • C:\Windows\system32\chcp.com
                                        chcp 65001
                                        14⤵
                                          PID:1424
                                        • C:\Windows\system32\PING.EXE
                                          ping -n 10 localhost
                                          14⤵
                                          • System Network Configuration Discovery: Internet Connection Discovery
                                          • Runs ping.exe
                                          PID:4792
                                        • C:\Windows\system32\SubDir\Client.exe
                                          "C:\Windows\system32\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:3760
                                          • C:\Windows\SYSTEM32\schtasks.exe
                                            "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                            15⤵
                                            • Scheduled Task/Job: Scheduled Task
                                            PID:3332
                                          • C:\Windows\system32\cmd.exe
                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\uurYW2y985qw.bat" "
                                            15⤵
                                              PID:1440
                                              • C:\Windows\system32\chcp.com
                                                chcp 65001
                                                16⤵
                                                  PID:1524
                                                • C:\Windows\system32\PING.EXE
                                                  ping -n 10 localhost
                                                  16⤵
                                                  • System Network Configuration Discovery: Internet Connection Discovery
                                                  • Runs ping.exe
                                                  PID:816
                                                • C:\Windows\system32\SubDir\Client.exe
                                                  "C:\Windows\system32\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:3060
                                                  • C:\Windows\SYSTEM32\schtasks.exe
                                                    "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                    17⤵
                                                    • Scheduled Task/Job: Scheduled Task
                                                    PID:5096
                                                  • C:\Windows\system32\cmd.exe
                                                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\yXNdzRsaDe9u.bat" "
                                                    17⤵
                                                      PID:4072
                                                      • C:\Windows\system32\chcp.com
                                                        chcp 65001
                                                        18⤵
                                                          PID:3520
                                                        • C:\Windows\system32\PING.EXE
                                                          ping -n 10 localhost
                                                          18⤵
                                                          • System Network Configuration Discovery: Internet Connection Discovery
                                                          • Runs ping.exe
                                                          PID:820
                                                        • C:\Windows\system32\SubDir\Client.exe
                                                          "C:\Windows\system32\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:4392
                                                          • C:\Windows\SYSTEM32\schtasks.exe
                                                            "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                            19⤵
                                                            • Scheduled Task/Job: Scheduled Task
                                                            PID:1612
                                                          • C:\Windows\system32\cmd.exe
                                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\iYgybgttknTD.bat" "
                                                            19⤵
                                                              PID:4472
                                                              • C:\Windows\system32\chcp.com
                                                                chcp 65001
                                                                20⤵
                                                                  PID:4700
                                                                • C:\Windows\system32\PING.EXE
                                                                  ping -n 10 localhost
                                                                  20⤵
                                                                  • System Network Configuration Discovery: Internet Connection Discovery
                                                                  • Runs ping.exe
                                                                  PID:3064
                                                                • C:\Windows\system32\SubDir\Client.exe
                                                                  "C:\Windows\system32\SubDir\Client.exe"
                                                                  20⤵
                                                                  • Checks computer location settings
                                                                  • Executes dropped EXE
                                                                  • Suspicious use of AdjustPrivilegeToken
                                                                  • Suspicious use of FindShellTrayWindow
                                                                  • Suspicious use of SendNotifyMessage
                                                                  • Suspicious use of SetWindowsHookEx
                                                                  PID:4704
                                                                  • C:\Windows\SYSTEM32\schtasks.exe
                                                                    "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                                    21⤵
                                                                    • Scheduled Task/Job: Scheduled Task
                                                                    PID:3648
                                                                  • C:\Windows\system32\cmd.exe
                                                                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\1GKdfi9QaHCW.bat" "
                                                                    21⤵
                                                                      PID:2688
                                                                      • C:\Windows\system32\chcp.com
                                                                        chcp 65001
                                                                        22⤵
                                                                          PID:4620
                                                                        • C:\Windows\system32\PING.EXE
                                                                          ping -n 10 localhost
                                                                          22⤵
                                                                          • System Network Configuration Discovery: Internet Connection Discovery
                                                                          • Runs ping.exe
                                                                          PID:732
                                                                        • C:\Windows\system32\SubDir\Client.exe
                                                                          "C:\Windows\system32\SubDir\Client.exe"
                                                                          22⤵
                                                                          • Checks computer location settings
                                                                          • Executes dropped EXE
                                                                          • Suspicious use of AdjustPrivilegeToken
                                                                          • Suspicious use of FindShellTrayWindow
                                                                          • Suspicious use of SendNotifyMessage
                                                                          • Suspicious use of SetWindowsHookEx
                                                                          PID:816
                                                                          • C:\Windows\SYSTEM32\schtasks.exe
                                                                            "schtasks" /create /tn "system" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                                            23⤵
                                                                            • Scheduled Task/Job: Scheduled Task
                                                                            PID:1440
                                                                          • C:\Windows\system32\cmd.exe
                                                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\cs1llyTnFBTI.bat" "
                                                                            23⤵
                                                                              PID:112
                                                                              • C:\Windows\system32\chcp.com
                                                                                chcp 65001
                                                                                24⤵
                                                                                  PID:4488
                                                                                • C:\Windows\system32\PING.EXE
                                                                                  ping -n 10 localhost
                                                                                  24⤵
                                                                                  • System Network Configuration Discovery: Internet Connection Discovery
                                                                                  • Runs ping.exe
                                                                                  PID:1388

                                  Network

                                        MITRE ATT&CK Enterprise v15

                                        Replay Monitor

                                        Loading Replay Monitor...

                                        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

                                        16rWPrJkI3uc.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\16rWPrJkI3uc.bat
                                        • Size 196B
                                        • SHA256 b44990984ddb0aee31fd515118235e5bc9afb105ac6c78cbcd3df14e213d83f5
                                        • MD5 SHA1 SHA512

                                        1GKdfi9QaHCW.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\1GKdfi9QaHCW.bat
                                        • Size 196B
                                        • SHA256 996454b0fd9ce7cbf726877034981aafd73d254518c91d50dd69ba4214febbbf
                                        • MD5 SHA1 SHA512

                                        67l05jYVpqrJ.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\67l05jYVpqrJ.bat
                                        • Size 196B
                                        • SHA256 0437fc572cc664fdbe3f7275446de9b423e07c68caf4a975b5dacbcd623aa8af
                                        • MD5 SHA1 SHA512

                                        8quIcYhNq76Z.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\8quIcYhNq76Z.bat
                                        • Size 196B
                                        • SHA256 b5e337e5d91562b3e9beecfb634dbb601a8f518dfd464194b434777aabca3d5f
                                        • MD5 SHA1 SHA512

                                        cBehnxJBnpNT.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\cBehnxJBnpNT.bat
                                        • Size 196B
                                        • SHA256 feac9a15e1cee89a5dff6be6c2615163fef3d8028e8251b9ddbbd3293165dd03
                                        • MD5 SHA1 SHA512

                                        cs1llyTnFBTI.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\cs1llyTnFBTI.bat
                                        • Size 196B
                                        • SHA256 9e151b74bd678b1f0db5de0278620eabee140537a153a21f8c36736a2abddff9
                                        • MD5 SHA1 SHA512

                                        iYgybgttknTD.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\iYgybgttknTD.bat
                                        • Size 196B
                                        • SHA256 f294ca92065509cd1113152ec2842cae2d50f9016870c4fbfd0dd6299b30249d
                                        • MD5 SHA1 SHA512

                                        ljASEiJZGQCC.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\ljASEiJZGQCC.bat
                                        • Size 196B
                                        • SHA256 e8ccec0da76a0e8b55386f23db61605b3f6b61da34a90389a3bc290b01a40aaf
                                        • MD5 SHA1 SHA512

                                        tjfXSf7VY5Vz.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\tjfXSf7VY5Vz.bat
                                        • Size 196B
                                        • SHA256 8d6fdcaebda5f07d75bcbc61c809283f38f09405b3dbe0b607a6e0ca25c8e298
                                        • MD5 SHA1 SHA512

                                        uurYW2y985qw.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\uurYW2y985qw.bat
                                        • Size 196B
                                        • SHA256 394e890f783d0dfaae696b4ef0a212922f1421fe7f506a1ce36f009658b6bd3a
                                        • MD5 SHA1 SHA512

                                        yXNdzRsaDe9u.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\yXNdzRsaDe9u.bat
                                        • Size 196B
                                        • SHA256 fb78c737aa78084480bc34f340cfd0b55acd66ff8d0ecbd94f3e857e1395096f
                                        • MD5 SHA1 SHA512

                                        Client.exe

                                        • Path C:\Windows\System32\SubDir\Client.exe
                                        • Size 502KB
                                        • SHA256 84e33e3232dc792f6333dd8ebfbcab0f4c75bf3593d58a57e424fc30e84759a7
                                        • MD5 SHA1 SHA512 SSDEEP

                                        memory/820-0-0x00007FF91EDA3000-0x00007FF91EDA5000-memory.dmp

                                        memory/820-2-0x00007FF91EDA0000-0x00007FF91F861000-memory.dmp

                                        memory/820-10-0x00007FF91EDA0000-0x00007FF91F861000-memory.dmp

                                        memory/820-1-0x0000000000650000-0x00000000006D4000-memory.dmp

                                        memory/1600-17-0x00007FF91EDA0000-0x00007FF91F861000-memory.dmp

                                        memory/1600-12-0x000000001C470000-0x000000001C522000-memory.dmp

                                        memory/1600-11-0x000000001C360000-0x000000001C3B0000-memory.dmp

                                        memory/1600-7-0x00007FF91EDA0000-0x00007FF91F861000-memory.dmp

                                        memory/1600-8-0x00007FF91EDA0000-0x00007FF91F861000-memory.dmp