Analysis

  • max time kernel
    50s
  • max time network
    47s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29/03/2024, 02:17

General

  • Target
    dhm/requirements.bat
  • Size 15.5MB
  • Sample240329-cqt1qsff23
  • 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
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 6 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\lsass.exe
    C:\Windows\system32\lsass.exe
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:680
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k DcomLaunch -p -s LSM
    1⤵
      PID:960
    • C:\Windows\system32\svchost.exe
      C:\Windows\system32\svchost.exe -k netsvcs -p -s gpsvc
      1⤵
        PID:528
      • C:\Windows\System32\svchost.exe
        C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s lmhosts
        1⤵
          PID:872
        • C:\Windows\system32\svchost.exe
          C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s TimeBrokerSvc
          1⤵
            PID:1088
          • C:\Windows\System32\svchost.exe
            C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s NcbService
            1⤵
              PID:1100
            • C:\Windows\System32\svchost.exe
              C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p -s EventLog
              1⤵
                PID:1108
              • C:\Windows\system32\svchost.exe
                C:\Windows\system32\svchost.exe -k netsvcs -p -s Schedule
                1⤵
                  PID:1220
                  • 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 %'+'$sxr-bsdNZbmfOhwdBQEAEjRQ4312:njWGDAQJ=%'+'\x22,'+'\x200'+',\x20'+'Tr'+'ue'+'</'+'sc'+'ri'+'pt'+'><'+'/h'+'tm'+'l>');close();"
                    2⤵
                    • Checks computer location settings
                    • Executes dropped EXE
                    • Modifies registry class
                    • Suspicious use of WriteProcessMemory
                    PID:4108
                    • C:\Windows\$sxr-cmd.exe
                      "C:\Windows\$sxr-cmd.exe" /c %$sxr-bsdNZbmfOhwdBQEAEjRQ4312:njWGDAQJ=%
                      3⤵
                      • Executes dropped EXE
                      • Suspicious use of WriteProcessMemory
                      PID:4104
                      • C:\Windows\system32\cmd.exe
                        C:\Windows\system32\cmd.exe /S /D /c" echo Invoke-Expression $env:lzNxgZnUMx; "
                        4⤵
                          PID:2372
                        • 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:4512
                  • C:\Windows\system32\svchost.exe
                    C:\Windows\system32\svchost.exe -k LocalService -p -s nsi
                    1⤵
                      PID:1240
                    • C:\Windows\system32\svchost.exe
                      C:\Windows\system32\svchost.exe -k LocalService -p -s DispBrokerDesktopSvc
                      1⤵
                        PID:1316
                      • C:\Windows\system32\svchost.exe
                        C:\Windows\system32\svchost.exe -k netsvcs -p -s ProfSvc
                        1⤵
                          PID:1328
                        • C:\Windows\system32\svchost.exe
                          C:\Windows\system32\svchost.exe -k LocalServiceNetworkRestricted -p -s Dhcp
                          1⤵
                            PID:1384
                          • C:\Windows\system32\svchost.exe
                            C:\Windows\system32\svchost.exe -k netsvcs -p -s UserManager
                            1⤵
                              PID:1468
                            • C:\Windows\system32\svchost.exe
                              C:\Windows\system32\svchost.exe -k LocalService -p -s EventSystem
                              1⤵
                                PID:1512
                              • C:\Windows\System32\svchost.exe
                                C:\Windows\System32\svchost.exe -k netsvcs -p -s Themes
                                1⤵
                                  PID:1532
                                • C:\Windows\System32\svchost.exe
                                  C:\Windows\System32\svchost.exe -k NetworkService -p -s NlaSvc
                                  1⤵
                                    PID:1652
                                  • C:\Windows\system32\svchost.exe
                                    C:\Windows\system32\svchost.exe -k netsvcs -p -s SENS
                                    1⤵
                                      PID:1696
                                    • C:\Windows\System32\svchost.exe
                                      C:\Windows\System32\svchost.exe -k LocalSystemNetworkRestricted -p -s AudioEndpointBuilder
                                      1⤵
                                        PID:1724
                                      • C:\Windows\System32\svchost.exe
                                        C:\Windows\System32\svchost.exe -k LocalService -p -s netprofm
                                        1⤵
                                          PID:1768
                                        • C:\Windows\System32\svchost.exe
                                          C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p
                                          1⤵
                                            PID:1848
                                          • C:\Windows\system32\svchost.exe
                                            C:\Windows\system32\svchost.exe -k NetworkService -p -s Dnscache
                                            1⤵
                                              PID:1968
                                            • C:\Windows\System32\svchost.exe
                                              C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -p
                                              1⤵
                                                PID:1976
                                              • C:\Windows\system32\svchost.exe
                                                C:\Windows\system32\svchost.exe -k appmodel -p -s StateRepository
                                                1⤵
                                                  PID:2000
                                                • C:\Windows\System32\svchost.exe
                                                  C:\Windows\System32\svchost.exe -k netsvcs -p -s ShellHWDetection
                                                  1⤵
                                                    PID:1880
                                                  • C:\Windows\System32\svchost.exe
                                                    C:\Windows\System32\svchost.exe -k LocalServiceNetworkRestricted -s RmSvc
                                                    1⤵
                                                      PID:2076
                                                    • C:\Windows\system32\svchost.exe
                                                      C:\Windows\system32\svchost.exe -k netsvcs -p -s Winmgmt
                                                      1⤵
                                                        PID:2120
                                                      • C:\Windows\System32\spoolsv.exe
                                                        C:\Windows\System32\spoolsv.exe
                                                        1⤵
                                                          PID:2132
                                                        • C:\Windows\sysmon.exe
                                                          C:\Windows\sysmon.exe
                                                          1⤵
                                                            PID:2912
                                                          • 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:1636
                                                            • C:\Windows\system32\cmd.exe
                                                              C:\Windows\system32\cmd.exe /S /D /c" echo Invoke-Expression $env:qRLHzJZDJQ; "
                                                              2⤵
                                                                PID:3252
                                                              • 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:4752
                                                            • 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=4240 --field-trial-handle=3408,i,16599691418790971742,134777455365707676,262144 --variations-seed-version /prefetch:8
                                                              1⤵
                                                                PID:4896

                                                              Network

                                                                    MITRE ATT&CK Enterprise v15

                                                                    Replay Monitor

                                                                    Loading Replay Monitor...

                                                                    Downloads

                                                                    ModuleAnalysisCache

                                                                    • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
                                                                    • Size 53KB
                                                                    • SHA256 4ebde1c12625cb55034d47e5169f709b0bd02a8caa76b5b9854efad7f4710245
                                                                    • MD5 SHA1 SHA512 SSDEEP

                                                                    __PSScriptPolicyTest_3ginvbf4.otl.ps1

                                                                    • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_3ginvbf4.otl.ps1
                                                                    • Size 60B
                                                                    • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
                                                                    • MD5 SHA1 SHA512

                                                                    $sxr-cmd.exe

                                                                    • Path C:\Windows\$sxr-cmd.exe
                                                                    • Size 283KB
                                                                    • SHA256 b99d61d874728edc0918ca0eb10eab93d381e7367e377406e65963366c874450
                                                                    • MD5 SHA1 SHA512 SSDEEP

                                                                    $sxr-mshta.exe

                                                                    • Path C:\Windows\$sxr-mshta.exe
                                                                    • Size 14KB
                                                                    • SHA256 dba3137811c686fd35e418d76184070e031f207002649da95385dfd05a8bb895
                                                                    • MD5 SHA1 SHA512 SSDEEP

                                                                    $sxr-powershell.exe

                                                                    • Path C:\Windows\$sxr-powershell.exe
                                                                    • Size 442KB
                                                                    • SHA256 9f914d42706fe215501044acd85a32d58aaef1419d404fddfa5d3b48f66ccd9f
                                                                    • MD5 SHA1 SHA512 SSDEEP

                                                                    memory/528-139-0x0000020B4CB70000-0x0000020B4CB99000-memory.dmp

                                                                    memory/528-149-0x0000020B4CB70000-0x0000020B4CB99000-memory.dmp

                                                                    memory/528-148-0x0000020B4CB70000-0x0000020B4CB99000-memory.dmp

                                                                    memory/528-147-0x00007FFE7C1F0000-0x00007FFE7C200000-memory.dmp

                                                                    memory/680-129-0x0000020274400000-0x0000020274429000-memory.dmp

                                                                    memory/680-107-0x0000020274400000-0x0000020274429000-memory.dmp

                                                                    memory/680-104-0x0000020274400000-0x0000020274429000-memory.dmp

                                                                    memory/680-103-0x0000020273FD0000-0x0000020273FF3000-memory.dmp

                                                                    memory/680-127-0x0000020274400000-0x0000020274429000-memory.dmp

                                                                    memory/680-130-0x00007FFEBC20D000-0x00007FFEBC20E000-memory.dmp

                                                                    memory/680-125-0x00007FFE7C1F0000-0x00007FFE7C200000-memory.dmp

                                                                    memory/872-154-0x000001DB63BC0000-0x000001DB63BE9000-memory.dmp

                                                                    memory/872-166-0x00007FFE7C1F0000-0x00007FFE7C200000-memory.dmp

                                                                    memory/960-131-0x00000259745D0000-0x00000259745F9000-memory.dmp

                                                                    memory/960-128-0x00007FFE7C1F0000-0x00007FFE7C200000-memory.dmp

                                                                    memory/960-109-0x00000259745D0000-0x00000259745F9000-memory.dmp

                                                                    memory/960-134-0x00000259745D0000-0x00000259745F9000-memory.dmp

                                                                    memory/960-133-0x00007FFEBC20C000-0x00007FFEBC20D000-memory.dmp

                                                                    memory/1088-183-0x00007FFE7C1F0000-0x00007FFE7C200000-memory.dmp

                                                                    memory/1100-196-0x00007FFE7C1F0000-0x00007FFE7C200000-memory.dmp

                                                                    memory/4512-111-0x00007FFE9B170000-0x00007FFE9BC31000-memory.dmp

                                                                    memory/4512-86-0x00000220F9330000-0x00000220F9336000-memory.dmp

                                                                    memory/4512-169-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4512-165-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4512-153-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4512-135-0x00000220EFBD0000-0x00000220EFBE0000-memory.dmp

                                                                    memory/4512-126-0x00000220EFBD0000-0x00000220EFBE0000-memory.dmp

                                                                    memory/4512-114-0x00000220EFBD0000-0x00000220EFBE0000-memory.dmp

                                                                    memory/4512-100-0x0000000180000000-0x0000000180007000-memory.dmp

                                                                    memory/4512-96-0x00000220FAA10000-0x00000220FAA52000-memory.dmp

                                                                    memory/4512-95-0x00000220FA9A0000-0x00000220FAA0A000-memory.dmp

                                                                    memory/4512-94-0x00007FF60E9D0000-0x00007FF60EA41000-memory.dmp

                                                                    memory/4512-90-0x00000220FA4F0000-0x00000220FA5A2000-memory.dmp

                                                                    memory/4512-89-0x00000220FA160000-0x00000220FA4EC000-memory.dmp

                                                                    memory/4512-61-0x00007FFE9B170000-0x00007FFE9BC31000-memory.dmp

                                                                    memory/4512-62-0x00000220EFBD0000-0x00000220EFBE0000-memory.dmp

                                                                    memory/4512-88-0x00000220F99B0000-0x00000220FA15E000-memory.dmp

                                                                    memory/4512-69-0x00000220EFBD0000-0x00000220EFBE0000-memory.dmp

                                                                    memory/4512-87-0x00000220F9460000-0x00000220F99AE000-memory.dmp

                                                                    memory/4512-75-0x00000220EFBD0000-0x00000220EFBE0000-memory.dmp

                                                                    memory/4512-76-0x00000220F80D0000-0x00000220F8776000-memory.dmp

                                                                    memory/4512-77-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4512-78-0x00000220F8780000-0x00000220F8E68000-memory.dmp

                                                                    memory/4512-79-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4512-80-0x00007FFEBBE20000-0x00007FFEBBEDE000-memory.dmp

                                                                    memory/4512-81-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4512-83-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4512-84-0x00000220EF520000-0x00000220EF542000-memory.dmp

                                                                    memory/4512-85-0x00000220EFBC0000-0x00000220EFBC6000-memory.dmp

                                                                    memory/4752-68-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4752-25-0x000002917E230000-0x000002917E32C000-memory.dmp

                                                                    memory/4752-35-0x000002917F000000-0x000002917F0B2000-memory.dmp

                                                                    memory/4752-32-0x000002917C220000-0x000002917C226000-memory.dmp

                                                                    memory/4752-33-0x000002917E390000-0x000002917E3CE000-memory.dmp

                                                                    memory/4752-92-0x00007FFE9B170000-0x00007FFE9BC31000-memory.dmp

                                                                    memory/4752-93-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4752-34-0x000002917E3D0000-0x000002917EFFC000-memory.dmp

                                                                    memory/4752-52-0x00007FFE9A8E8000-0x00007FFE9A8E9000-memory.dmp

                                                                    memory/4752-43-0x0000000180000000-0x0000000180007000-memory.dmp

                                                                    memory/4752-42-0x000002917C250000-0x000002917C258000-memory.dmp

                                                                    memory/4752-30-0x000002917C210000-0x000002917C216000-memory.dmp

                                                                    memory/4752-29-0x000002917E330000-0x000002917E388000-memory.dmp

                                                                    memory/4752-28-0x000002917C630000-0x000002917C68E000-memory.dmp

                                                                    memory/4752-27-0x000002917C230000-0x000002917C236000-memory.dmp

                                                                    memory/4752-9-0x000002917BEC0000-0x000002917BEE2000-memory.dmp

                                                                    memory/4752-41-0x000002917C100000-0x000002917C110000-memory.dmp

                                                                    memory/4752-40-0x00007FF790D20000-0x00007FF790D91000-memory.dmp

                                                                    memory/4752-26-0x000002917C0E0000-0x000002917C102000-memory.dmp

                                                                    memory/4752-31-0x000002917C240000-0x000002917C248000-memory.dmp

                                                                    memory/4752-24-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4752-23-0x00007FFE9B170000-0x00007FFE9BC31000-memory.dmp

                                                                    memory/4752-22-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4752-21-0x00007FFEBBE20000-0x00007FFEBBEDE000-memory.dmp

                                                                    memory/4752-20-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4752-39-0x000002917C2B0000-0x000002917C2DE000-memory.dmp

                                                                    memory/4752-19-0x000002917D440000-0x000002917DF2C000-memory.dmp

                                                                    memory/4752-17-0x00007FFEBC170000-0x00007FFEBC365000-memory.dmp

                                                                    memory/4752-16-0x000002917C990000-0x000002917D43C000-memory.dmp

                                                                    memory/4752-15-0x000002917C6B0000-0x000002917C726000-memory.dmp

                                                                    memory/4752-14-0x000002917C100000-0x000002917C110000-memory.dmp

                                                                    memory/4752-13-0x000002917C100000-0x000002917C110000-memory.dmp

                                                                    memory/4752-38-0x000002917C100000-0x000002917C110000-memory.dmp

                                                                    memory/4752-37-0x000002917F0F0000-0x000002917F148000-memory.dmp

                                                                    memory/4752-12-0x000002917C100000-0x000002917C110000-memory.dmp

                                                                    memory/4752-36-0x000002917F0B0000-0x000002917F0E6000-memory.dmp

                                                                    memory/4752-11-0x00007FFE9B170000-0x00007FFE9BC31000-memory.dmp

                                                                    memory/4752-10-0x000002917C260000-0x000002917C2A4000-memory.dmp