Analysis

  • max time kernel
    140s
  • max time network
    163s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/07/2024, 01:01

General

  • Target
    04fd43a2fbf40610f559b11414d1a71e.exe
  • Size 3.1MB
  • Sample240701-bdbsys1eka
  • SHA256 8f2f7929d4d3d04be498567f02d567521ce4c5e7a1d400c4f64f4c2bd78ddcb9
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • pringelsy-41920.portmap.host:41920

Mutex
  • 63621aac-ae17-49da-9413-459827e68061

Attributes
  • encryption_key

    4F2985A1DF21C9CA0E34D9186E1BC62AF4B58C14

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Opera GX

  • 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
  • Drops file in System32 directory 21 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • 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 11 IoCs
  • Suspicious use of FindShellTrayWindow 9 IoCs
  • Suspicious use of SendNotifyMessage 9 IoCs
  • Suspicious use of SetWindowsHookEx 1 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\04fd43a2fbf40610f559b11414d1a71e.exe
    "C:\Users\Admin\AppData\Local\Temp\04fd43a2fbf40610f559b11414d1a71e.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4076
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:3996
    • C:\Windows\system32\SubDir\Client.exe
      "C:\Windows\system32\SubDir\Client.exe"
      2⤵
      • Checks computer location settings
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1028
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3912
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\pzKKEkHCzrBM.bat" "
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4144
        • C:\Windows\system32\chcp.com
          chcp 65001
          4⤵
            PID:2908
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            4⤵
            • Runs ping.exe
            PID:2516
          • C:\Windows\system32\SubDir\Client.exe
            "C:\Windows\system32\SubDir\Client.exe"
            4⤵
            • Checks computer location settings
            • Executes dropped EXE
            • Drops file in System32 directory
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of FindShellTrayWindow
            • Suspicious use of SendNotifyMessage
            • Suspicious use of WriteProcessMemory
            PID:536
            • C:\Windows\SYSTEM32\schtasks.exe
              "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
              5⤵
              • Scheduled Task/Job: Scheduled Task
              PID:376
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tMQm14DM7Mxd.bat" "
              5⤵
              • Suspicious use of WriteProcessMemory
              PID:2768
              • C:\Windows\system32\chcp.com
                chcp 65001
                6⤵
                  PID:4440
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  6⤵
                  • Runs ping.exe
                  PID:940
                • C:\Windows\system32\SubDir\Client.exe
                  "C:\Windows\system32\SubDir\Client.exe"
                  6⤵
                  • Checks computer location settings
                  • Executes dropped EXE
                  • Drops file in System32 directory
                  • Suspicious use of AdjustPrivilegeToken
                  • Suspicious use of FindShellTrayWindow
                  • Suspicious use of SendNotifyMessage
                  • Suspicious use of WriteProcessMemory
                  PID:1108
                  • C:\Windows\SYSTEM32\schtasks.exe
                    "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                    7⤵
                    • Scheduled Task/Job: Scheduled Task
                    PID:3544
                  • C:\Windows\system32\cmd.exe
                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\Mg5GdbLDA3rG.bat" "
                    7⤵
                    • Suspicious use of WriteProcessMemory
                    PID:1128
                    • C:\Windows\system32\chcp.com
                      chcp 65001
                      8⤵
                        PID:1192
                      • C:\Windows\system32\PING.EXE
                        ping -n 10 localhost
                        8⤵
                        • Runs ping.exe
                        PID:1180
                      • C:\Windows\system32\SubDir\Client.exe
                        "C:\Windows\system32\SubDir\Client.exe"
                        8⤵
                        • Checks computer location settings
                        • Executes dropped EXE
                        • Drops file in System32 directory
                        • Suspicious use of AdjustPrivilegeToken
                        • Suspicious use of FindShellTrayWindow
                        • Suspicious use of SendNotifyMessage
                        • Suspicious use of WriteProcessMemory
                        PID:2004
                        • C:\Windows\SYSTEM32\schtasks.exe
                          "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                          9⤵
                          • Scheduled Task/Job: Scheduled Task
                          PID:1900
                        • C:\Windows\system32\cmd.exe
                          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7uGElpLiKIIq.bat" "
                          9⤵
                          • Suspicious use of WriteProcessMemory
                          PID:5044
                          • C:\Windows\system32\chcp.com
                            chcp 65001
                            10⤵
                              PID:3828
                            • C:\Windows\system32\PING.EXE
                              ping -n 10 localhost
                              10⤵
                              • Runs ping.exe
                              PID:3092
                            • C:\Windows\system32\SubDir\Client.exe
                              "C:\Windows\system32\SubDir\Client.exe"
                              10⤵
                              • Checks computer location settings
                              • Executes dropped EXE
                              • Drops file in System32 directory
                              • Suspicious use of AdjustPrivilegeToken
                              • Suspicious use of FindShellTrayWindow
                              • Suspicious use of SendNotifyMessage
                              • Suspicious use of WriteProcessMemory
                              PID:3320
                              • C:\Windows\SYSTEM32\schtasks.exe
                                "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                11⤵
                                • Scheduled Task/Job: Scheduled Task
                                PID:2992
                              • C:\Windows\system32\cmd.exe
                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\WMva5WEMDqQQ.bat" "
                                11⤵
                                • Suspicious use of WriteProcessMemory
                                PID:1420
                                • C:\Windows\system32\chcp.com
                                  chcp 65001
                                  12⤵
                                    PID:4376
                                  • C:\Windows\system32\PING.EXE
                                    ping -n 10 localhost
                                    12⤵
                                    • Runs ping.exe
                                    PID:3504
                                  • C:\Windows\system32\SubDir\Client.exe
                                    "C:\Windows\system32\SubDir\Client.exe"
                                    12⤵
                                    • Checks computer location settings
                                    • Executes dropped EXE
                                    • Drops file in System32 directory
                                    • Suspicious use of AdjustPrivilegeToken
                                    • Suspicious use of FindShellTrayWindow
                                    • Suspicious use of SendNotifyMessage
                                    • Suspicious use of WriteProcessMemory
                                    PID:452
                                    • C:\Windows\SYSTEM32\schtasks.exe
                                      "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                      13⤵
                                      • Scheduled Task/Job: Scheduled Task
                                      PID:5016
                                    • C:\Windows\system32\cmd.exe
                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\PcPKJchbrnUi.bat" "
                                      13⤵
                                      • Suspicious use of WriteProcessMemory
                                      PID:4356
                                      • C:\Windows\system32\chcp.com
                                        chcp 65001
                                        14⤵
                                          PID:3372
                                        • C:\Windows\system32\PING.EXE
                                          ping -n 10 localhost
                                          14⤵
                                          • Runs ping.exe
                                          PID:208
                                        • C:\Windows\system32\SubDir\Client.exe
                                          "C:\Windows\system32\SubDir\Client.exe"
                                          14⤵
                                          • Checks computer location settings
                                          • Executes dropped EXE
                                          • Drops file in System32 directory
                                          • Suspicious use of AdjustPrivilegeToken
                                          • Suspicious use of FindShellTrayWindow
                                          • Suspicious use of SendNotifyMessage
                                          PID:4084
                                          • C:\Windows\SYSTEM32\schtasks.exe
                                            "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                            15⤵
                                            • Scheduled Task/Job: Scheduled Task
                                            PID:1112
                                          • C:\Windows\system32\cmd.exe
                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\IrtnYruOf9bg.bat" "
                                            15⤵
                                              PID:4724
                                              • C:\Windows\system32\chcp.com
                                                chcp 65001
                                                16⤵
                                                  PID:1496
                                                • C:\Windows\system32\PING.EXE
                                                  ping -n 10 localhost
                                                  16⤵
                                                  • Runs ping.exe
                                                  PID:1744
                                                • C:\Windows\system32\SubDir\Client.exe
                                                  "C:\Windows\system32\SubDir\Client.exe"
                                                  16⤵
                                                  • Checks computer location settings
                                                  • Executes dropped EXE
                                                  • Drops file in System32 directory
                                                  • Suspicious use of AdjustPrivilegeToken
                                                  • Suspicious use of FindShellTrayWindow
                                                  • Suspicious use of SendNotifyMessage
                                                  PID:5104
                                                  • C:\Windows\SYSTEM32\schtasks.exe
                                                    "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                    17⤵
                                                    • Scheduled Task/Job: Scheduled Task
                                                    PID:3192
                                                  • C:\Windows\system32\cmd.exe
                                                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\LCUXSqRWZgRt.bat" "
                                                    17⤵
                                                      PID:2900
                                                      • C:\Windows\system32\chcp.com
                                                        chcp 65001
                                                        18⤵
                                                          PID:4172
                                                        • C:\Windows\system32\PING.EXE
                                                          ping -n 10 localhost
                                                          18⤵
                                                          • Runs ping.exe
                                                          PID:4460
                                                        • C:\Windows\system32\SubDir\Client.exe
                                                          "C:\Windows\system32\SubDir\Client.exe"
                                                          18⤵
                                                          • Checks computer location settings
                                                          • Executes dropped EXE
                                                          • Drops file in System32 directory
                                                          • Suspicious use of AdjustPrivilegeToken
                                                          • Suspicious use of FindShellTrayWindow
                                                          • Suspicious use of SendNotifyMessage
                                                          PID:3048
                                                          • C:\Windows\SYSTEM32\schtasks.exe
                                                            "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                            19⤵
                                                            • Scheduled Task/Job: Scheduled Task
                                                            PID:4184
                                                          • C:\Windows\system32\cmd.exe
                                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\7dObnY4ATtpX.bat" "
                                                            19⤵
                                                              PID:3628
                                                              • C:\Windows\system32\chcp.com
                                                                chcp 65001
                                                                20⤵
                                                                  PID:4948
                                                                • C:\Windows\system32\PING.EXE
                                                                  ping -n 10 localhost
                                                                  20⤵
                                                                  • Runs ping.exe
                                                                  PID:3912
                                                                • C:\Windows\system32\SubDir\Client.exe
                                                                  "C:\Windows\system32\SubDir\Client.exe"
                                                                  20⤵
                                                                  • Executes dropped EXE
                                                                  • Suspicious use of AdjustPrivilegeToken
                                                                  PID:3832
                                                                  • C:\Windows\SYSTEM32\schtasks.exe
                                                                    "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                                    21⤵
                                                                    • Scheduled Task/Job: Scheduled Task
                                                                    PID:732
                                                                  • C:\Windows\system32\cmd.exe
                                                                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\vwvS1wCl1CCy.bat" "
                                                                    21⤵
                                                                      PID:1616
                                                                      • C:\Windows\system32\chcp.com
                                                                        chcp 65001
                                                                        22⤵
                                                                          PID:4336
                                                                        • C:\Windows\system32\PING.EXE
                                                                          ping -n 10 localhost
                                                                          22⤵
                                                                          • Runs ping.exe
                                                                          PID:1576
                                                                        • C:\Windows\system32\SubDir\Client.exe
                                                                          "C:\Windows\system32\SubDir\Client.exe"
                                                                          22⤵
                                                                            PID:632
                                                                            • C:\Windows\SYSTEM32\schtasks.exe
                                                                              "schtasks" /create /tn "Opera GX" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                                              23⤵
                                                                              • Scheduled Task/Job: Scheduled Task
                                                                              PID:5084
                                                                            • C:\Windows\system32\cmd.exe
                                                                              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\dimkvIw4cUhZ.bat" "
                                                                              23⤵
                                                                                PID:380
                                                                                • C:\Windows\system32\chcp.com
                                                                                  chcp 65001
                                                                                  24⤵
                                                                                    PID:3584
                                                                                  • C:\Windows\system32\PING.EXE
                                                                                    ping -n 10 localhost
                                                                                    24⤵
                                                                                    • Runs ping.exe
                                                                                    PID:3092
                                    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                                      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=4264 --field-trial-handle=2656,i,16940681401824032220,151921362336696246,262144 --variations-seed-version /prefetch:8
                                      1⤵
                                        PID:4660

                                      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

                                            7dObnY4ATtpX.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\7dObnY4ATtpX.bat
                                            • Size 196B
                                            • SHA256 4fe12ca7d811596c355d473af4d4438cab25e22693849ff61dc18a7a866c686e
                                            • MD5 SHA1 SHA512

                                            7uGElpLiKIIq.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\7uGElpLiKIIq.bat
                                            • Size 196B
                                            • SHA256 0b16653b4d4fa95ce5d341500a6947d51864dff54d1c617549260b1dab174709
                                            • MD5 SHA1 SHA512

                                            IrtnYruOf9bg.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\IrtnYruOf9bg.bat
                                            • Size 196B
                                            • SHA256 f6041211e4eacb029ec6a46a37070f953d431c54afba02cb37a960f4bcb6a529
                                            • MD5 SHA1 SHA512

                                            LCUXSqRWZgRt.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\LCUXSqRWZgRt.bat
                                            • Size 196B
                                            • SHA256 9594ce1560bcd923fe1662b75e82bc04160ce617bb3ff62d5ca7a52b94e0780e
                                            • MD5 SHA1 SHA512

                                            Mg5GdbLDA3rG.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\Mg5GdbLDA3rG.bat
                                            • Size 196B
                                            • SHA256 70f2e9de4da439edec540a5978d0904847aba199589e4e8e9d4776e6ea8c713f
                                            • MD5 SHA1 SHA512

                                            PcPKJchbrnUi.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\PcPKJchbrnUi.bat
                                            • Size 196B
                                            • SHA256 dbceb18585be4f081c61ed7415789b8350c2e07d796326ca52d72548689b3548
                                            • MD5 SHA1 SHA512

                                            WMva5WEMDqQQ.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\WMva5WEMDqQQ.bat
                                            • Size 196B
                                            • SHA256 68f4b941419260f9d62c09695503639428e504d47b353d1664f8c35937130716
                                            • MD5 SHA1 SHA512

                                            dimkvIw4cUhZ.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\dimkvIw4cUhZ.bat
                                            • Size 196B
                                            • SHA256 60d381e47a14bb4e4bd378b0161b81bedf2b691501f9903fb29ad21c09b12528
                                            • MD5 SHA1 SHA512

                                            pzKKEkHCzrBM.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\pzKKEkHCzrBM.bat
                                            • Size 196B
                                            • SHA256 b1c18cdc9c9ee1e9aec9be68a2a650587682a567e913fb366e6ac120e9f2a44b
                                            • MD5 SHA1 SHA512

                                            tMQm14DM7Mxd.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\tMQm14DM7Mxd.bat
                                            • Size 196B
                                            • SHA256 dcdb6d9b0d22c284bb84d54598986fec29a31bbe0277ec6e2e76db0b2e1892c1
                                            • MD5 SHA1 SHA512

                                            vwvS1wCl1CCy.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\vwvS1wCl1CCy.bat
                                            • Size 196B
                                            • SHA256 585e927ed5d283ef16d8d338b64ddfabd12b034e21246cb23d0523ced403eac4
                                            • MD5 SHA1 SHA512

                                            Client.exe

                                            • Path C:\Windows\System32\SubDir\Client.exe
                                            • Size 3.1MB
                                            • SHA256 8f2f7929d4d3d04be498567f02d567521ce4c5e7a1d400c4f64f4c2bd78ddcb9
                                            • MD5 SHA1 SHA512 SSDEEP

                                            Client.exe

                                            • Path C:\Windows\System32\SubDir\Client.exe
                                            • Size 2.3MB
                                            • SHA256 074d1f1280ab5dc978dcd908b6cbe865bdb7712ce789b419e73236168f7d8948
                                            • MD5 SHA1 SHA512 SSDEEP

                                            Client.exe

                                            • Path C:\Windows\System32\SubDir\Client.exe
                                            • Size 661KB
                                            • SHA256 ba84cf0d5b9de5c74e2b3414c4b642691fbd489c66c3960f004a51a86027a408
                                            • MD5 SHA1 SHA512 SSDEEP

                                            memory/1028-12-0x000000001CB60000-0x000000001CBB0000-memory.dmp

                                            memory/1028-10-0x00007FFCA3100000-0x00007FFCA3BC1000-memory.dmp

                                            memory/1028-11-0x00007FFCA3100000-0x00007FFCA3BC1000-memory.dmp

                                            memory/1028-19-0x00007FFCA3100000-0x00007FFCA3BC1000-memory.dmp

                                            memory/1028-13-0x000000001CC70000-0x000000001CD22000-memory.dmp

                                            memory/4076-9-0x00007FFCA3100000-0x00007FFCA3BC1000-memory.dmp

                                            memory/4076-2-0x00007FFCA3100000-0x00007FFCA3BC1000-memory.dmp

                                            memory/4076-0-0x00007FFCA3103000-0x00007FFCA3105000-memory.dmp

                                            memory/4076-1-0x00000000001E0000-0x0000000000504000-memory.dmp