Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    25/04/2024, 20:13

General

  • Target
    Client-built.exe
  • Size 3.1MB
  • Sample240425-yzm5faeb21
  • SHA256 733436d5bc6464c09757584b8609fa28898f2622412e55421ebdab550e02e4ea
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • ZE:4782

Mutex
  • 911e182a-c76f-4c94-979c-4ba6b3b24941

Attributes
  • encryption_key

    EFF71D9D44DB5A6D9B14E191FC8CC16A1F4043B2

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 9 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 11 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

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 FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2808
    • C:\Windows\system32\cmd.exe
      cmd /c ""C:\Users\Admin\AppData\Local\Temp\sIoKX8xt3yIY.bat" "
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2440
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:2532
        • C:\Windows\system32\PING.EXE
          ping -n 10 localhost
          3⤵
          • Runs ping.exe
          PID:2536
        • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
          "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
          3⤵
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2564
          • C:\Windows\system32\cmd.exe
            cmd /c ""C:\Users\Admin\AppData\Local\Temp\PPAJPk5OYnUm.bat" "
            4⤵
            • Suspicious use of WriteProcessMemory
            PID:2152
            • C:\Windows\system32\chcp.com
              chcp 65001
              5⤵
                PID:2352
              • C:\Windows\system32\PING.EXE
                ping -n 10 localhost
                5⤵
                • Runs ping.exe
                PID:2396
              • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                5⤵
                • Suspicious use of AdjustPrivilegeToken
                • Suspicious use of FindShellTrayWindow
                • Suspicious use of SendNotifyMessage
                • Suspicious use of SetWindowsHookEx
                • Suspicious use of WriteProcessMemory
                PID:812
                • C:\Windows\system32\cmd.exe
                  cmd /c ""C:\Users\Admin\AppData\Local\Temp\21NRgodThqMB.bat" "
                  6⤵
                  • Suspicious use of WriteProcessMemory
                  PID:2144
                  • C:\Windows\system32\chcp.com
                    chcp 65001
                    7⤵
                      PID:2184
                    • C:\Windows\system32\PING.EXE
                      ping -n 10 localhost
                      7⤵
                      • Runs ping.exe
                      PID:1168
                    • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                      "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                      7⤵
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of FindShellTrayWindow
                      • Suspicious use of SendNotifyMessage
                      • Suspicious use of SetWindowsHookEx
                      • Suspicious use of WriteProcessMemory
                      PID:1152
                      • C:\Windows\system32\cmd.exe
                        cmd /c ""C:\Users\Admin\AppData\Local\Temp\lNTgFmPB8E5t.bat" "
                        8⤵
                        • Suspicious use of WriteProcessMemory
                        PID:1708
                        • C:\Windows\system32\chcp.com
                          chcp 65001
                          9⤵
                            PID:1112
                          • C:\Windows\system32\PING.EXE
                            ping -n 10 localhost
                            9⤵
                            • Runs ping.exe
                            PID:1592
                          • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                            "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                            9⤵
                            • Suspicious use of AdjustPrivilegeToken
                            • Suspicious use of FindShellTrayWindow
                            • Suspicious use of SendNotifyMessage
                            • Suspicious use of SetWindowsHookEx
                            • Suspicious use of WriteProcessMemory
                            PID:1956
                            • C:\Windows\system32\cmd.exe
                              cmd /c ""C:\Users\Admin\AppData\Local\Temp\g2KIafhWD7gZ.bat" "
                              10⤵
                              • Suspicious use of WriteProcessMemory
                              PID:2724
                              • C:\Windows\system32\chcp.com
                                chcp 65001
                                11⤵
                                  PID:2848
                                • C:\Windows\system32\PING.EXE
                                  ping -n 10 localhost
                                  11⤵
                                  • Runs ping.exe
                                  PID:2916
                                • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                                  "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                                  11⤵
                                  • Suspicious use of AdjustPrivilegeToken
                                  • Suspicious use of FindShellTrayWindow
                                  • Suspicious use of SendNotifyMessage
                                  • Suspicious use of SetWindowsHookEx
                                  • Suspicious use of WriteProcessMemory
                                  PID:1828
                                  • C:\Windows\system32\cmd.exe
                                    cmd /c ""C:\Users\Admin\AppData\Local\Temp\llFlJaCTCTqd.bat" "
                                    12⤵
                                    • Suspicious use of WriteProcessMemory
                                    PID:2984
                                    • C:\Windows\system32\chcp.com
                                      chcp 65001
                                      13⤵
                                        PID:1948
                                      • C:\Windows\system32\PING.EXE
                                        ping -n 10 localhost
                                        13⤵
                                        • Runs ping.exe
                                        PID:368
                                      • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                                        "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                                        13⤵
                                        • Suspicious use of AdjustPrivilegeToken
                                        • Suspicious use of FindShellTrayWindow
                                        • Suspicious use of SendNotifyMessage
                                        • Suspicious use of SetWindowsHookEx
                                        PID:2976
                                        • C:\Windows\system32\cmd.exe
                                          cmd /c ""C:\Users\Admin\AppData\Local\Temp\FNvPHTT8PN04.bat" "
                                          14⤵
                                            PID:892
                                            • C:\Windows\system32\chcp.com
                                              chcp 65001
                                              15⤵
                                                PID:2892
                                              • C:\Windows\system32\PING.EXE
                                                ping -n 10 localhost
                                                15⤵
                                                • Runs ping.exe
                                                PID:2264
                                              • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                                                "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                                                15⤵
                                                • Suspicious use of AdjustPrivilegeToken
                                                • Suspicious use of FindShellTrayWindow
                                                • Suspicious use of SendNotifyMessage
                                                • Suspicious use of SetWindowsHookEx
                                                PID:3068
                                                • C:\Windows\system32\cmd.exe
                                                  cmd /c ""C:\Users\Admin\AppData\Local\Temp\QDJqT0KZEEiT.bat" "
                                                  16⤵
                                                    PID:2684
                                                    • C:\Windows\system32\chcp.com
                                                      chcp 65001
                                                      17⤵
                                                        PID:2524
                                                      • C:\Windows\system32\PING.EXE
                                                        ping -n 10 localhost
                                                        17⤵
                                                        • Runs ping.exe
                                                        PID:2700
                                                      • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                                                        "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                                                        17⤵
                                                        • Suspicious use of AdjustPrivilegeToken
                                                        • Suspicious use of FindShellTrayWindow
                                                        • Suspicious use of SendNotifyMessage
                                                        • Suspicious use of SetWindowsHookEx
                                                        PID:2480
                                                        • C:\Windows\system32\cmd.exe
                                                          cmd /c ""C:\Users\Admin\AppData\Local\Temp\AuQ7vKvfY5mb.bat" "
                                                          18⤵
                                                            PID:1556
                                                            • C:\Windows\system32\chcp.com
                                                              chcp 65001
                                                              19⤵
                                                                PID:2376
                                                              • C:\Windows\system32\PING.EXE
                                                                ping -n 10 localhost
                                                                19⤵
                                                                • Runs ping.exe
                                                                PID:2776
                                                              • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                                                                "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                                                                19⤵
                                                                • Suspicious use of AdjustPrivilegeToken
                                                                • Suspicious use of FindShellTrayWindow
                                                                • Suspicious use of SendNotifyMessage
                                                                • Suspicious use of SetWindowsHookEx
                                                                PID:2552
                                                                • C:\Windows\system32\cmd.exe
                                                                  cmd /c ""C:\Users\Admin\AppData\Local\Temp\4jHUU36SHEOZ.bat" "
                                                                  20⤵
                                                                    PID:572
                                                                    • C:\Windows\system32\chcp.com
                                                                      chcp 65001
                                                                      21⤵
                                                                        PID:2944
                                                                      • C:\Windows\system32\PING.EXE
                                                                        ping -n 10 localhost
                                                                        21⤵
                                                                        • Runs ping.exe
                                                                        PID:2856
                                                                      • C:\Users\Admin\AppData\Local\Temp\Client-built.exe
                                                                        "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
                                                                        21⤵
                                                                        • Suspicious use of AdjustPrivilegeToken
                                                                        • Suspicious use of FindShellTrayWindow
                                                                        • Suspicious use of SendNotifyMessage
                                                                        • Suspicious use of SetWindowsHookEx
                                                                        PID:2304
                                                                        • C:\Windows\system32\cmd.exe
                                                                          cmd /c ""C:\Users\Admin\AppData\Local\Temp\CrWuAT57X1p4.bat" "
                                                                          22⤵
                                                                            PID:764
                                                                            • C:\Windows\system32\chcp.com
                                                                              chcp 65001
                                                                              23⤵
                                                                                PID:1108
                                                                              • C:\Windows\system32\PING.EXE
                                                                                ping -n 10 localhost
                                                                                23⤵
                                                                                • Runs ping.exe
                                                                                PID:2280

                                  Network

                                        MITRE ATT&CK Enterprise v15

                                        Replay Monitor

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                                        Downloads

                                        21NRgodThqMB.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\21NRgodThqMB.bat
                                        • Size 209B
                                        • SHA256 6d0ff437d70a709c30e94da2d2a741bfd42c841775493fd17c71a735d38cba0f
                                        • MD5 SHA1 SHA512

                                        4jHUU36SHEOZ.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\4jHUU36SHEOZ.bat
                                        • Size 209B
                                        • SHA256 6526ff4469de1216e426da4ea95a2a222a40c9ef3fa76104ce87a8c371a1eb39
                                        • MD5 SHA1 SHA512

                                        AuQ7vKvfY5mb.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\AuQ7vKvfY5mb.bat
                                        • Size 209B
                                        • SHA256 ccdaec82e868384ffb697676b8bfd6678d61156eb119632024def5b454856c43
                                        • MD5 SHA1 SHA512

                                        CrWuAT57X1p4.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\CrWuAT57X1p4.bat
                                        • Size 209B
                                        • SHA256 171d4b5122092e0095d85aa92b2bfc34a2bcde617ca21d45fab4476bcf4ef08b
                                        • MD5 SHA1 SHA512

                                        FNvPHTT8PN04.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\FNvPHTT8PN04.bat
                                        • Size 209B
                                        • SHA256 e6e15b0610fd4092f6c7844cbeeb6486bc2480cdeed6bd5fa5d8ca052f9edb9e
                                        • MD5 SHA1 SHA512

                                        PPAJPk5OYnUm.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\PPAJPk5OYnUm.bat
                                        • Size 209B
                                        • SHA256 b22ad5c4aff2d91b029a903cf76c88ef36d31b156568eeaa18d371983c705cbb
                                        • MD5 SHA1 SHA512

                                        QDJqT0KZEEiT.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\QDJqT0KZEEiT.bat
                                        • Size 209B
                                        • SHA256 cf761ad9fb995b713119844abde55e9eaa491f243d37a752a79ff657a727ecec
                                        • MD5 SHA1 SHA512

                                        g2KIafhWD7gZ.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\g2KIafhWD7gZ.bat
                                        • Size 209B
                                        • SHA256 b4c4df98160189cec9c2a55b4b8defc1e17e3108ba8ac62cbf1f29e955aeaf69
                                        • MD5 SHA1 SHA512

                                        lNTgFmPB8E5t.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\lNTgFmPB8E5t.bat
                                        • Size 209B
                                        • SHA256 a1ff7f1d4cb62119632ce45d0cba40fbebe4fd3e1b6be0c9ae3efd6a6b1c9bca
                                        • MD5 SHA1 SHA512

                                        llFlJaCTCTqd.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\llFlJaCTCTqd.bat
                                        • Size 209B
                                        • SHA256 69bb81b1746414521ad18b7ad53ec94948301e2514d90c2fa26c2d6904702c55
                                        • MD5 SHA1 SHA512

                                        sIoKX8xt3yIY.bat

                                        • Path C:\Users\Admin\AppData\Local\Temp\sIoKX8xt3yIY.bat
                                        • Size 209B
                                        • SHA256 177c92573f1874ba5a2801a6c70a0b1d664cfd04232e6c5ac131d35e8e6173cb
                                        • MD5 SHA1 SHA512

                                        memory/812-26-0x00000000000D0000-0x00000000003F4000-memory.dmp

                                        memory/812-28-0x0000000002190000-0x0000000002210000-memory.dmp

                                        memory/812-27-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/812-39-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/1152-40-0x0000000000970000-0x0000000000C94000-memory.dmp

                                        memory/1152-41-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/1152-42-0x000000001B320000-0x000000001B3A0000-memory.dmp

                                        memory/1152-53-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/1828-69-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/1828-80-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/1828-68-0x0000000001280000-0x00000000015A4000-memory.dmp

                                        memory/1956-55-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/1956-56-0x000000001B180000-0x000000001B200000-memory.dmp

                                        memory/1956-54-0x0000000000CD0000-0x0000000000FF4000-memory.dmp

                                        memory/1956-67-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/2304-134-0x0000000000DA0000-0x0000000000E20000-memory.dmp

                                        memory/2304-143-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/2304-133-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/2480-119-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/2480-110-0x000000001B3D0000-0x000000001B450000-memory.dmp

                                        memory/2480-109-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/2480-108-0x0000000001140000-0x0000000001464000-memory.dmp

                                        memory/2552-121-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/2552-122-0x000000001B310000-0x000000001B390000-memory.dmp

                                        memory/2552-132-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/2564-15-0x000000001B300000-0x000000001B380000-memory.dmp

                                        memory/2564-13-0x0000000001290000-0x00000000015B4000-memory.dmp

                                        memory/2564-25-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/2564-14-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/2808-12-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/2808-2-0x000000001B270000-0x000000001B2F0000-memory.dmp

                                        memory/2808-1-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/2808-0-0x0000000000CC0000-0x0000000000FE4000-memory.dmp

                                        memory/2976-93-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/2976-82-0x000007FEF53D0000-0x000007FEF5DBC000-memory.dmp

                                        memory/2976-81-0x0000000000060000-0x0000000000384000-memory.dmp

                                        memory/3068-107-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/3068-96-0x0000000000DC0000-0x0000000000E40000-memory.dmp

                                        memory/3068-95-0x000007FEF49E0000-0x000007FEF53CC000-memory.dmp

                                        memory/3068-94-0x00000000010C0000-0x00000000013E4000-memory.dmp