Resubmissions

28/05/2024, 02:35

240528-c3cl8acg6510

28/05/2024, 02:34

240528-c2ncbsbe8y10

Analysis

  • max time kernel
    145s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240508-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240508-enlocale:en-usos:windows10-2004-x64system
  • submitted
    28/05/2024, 02:34

General

  • Target
    SynapseX Revamped V1.5/SynapseXBootstrapper.exe
  • Size 3.1MB
  • Sample240528-c2ncbsbe8y
  • SHA256 de29011246319ec8b60774d8c4cad4e8299e27eba6dc7699cd257fbdda338336
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Windows Update

C2
  • skbidiooiilet-31205.portmap.host:31205

Mutex
  • b2f09b33-2e5b-4ffa-afbf-3f1aaed274a6

Attributes
  • encryption_key

    6F721445F7E0B1CF58980D84A9D49F4458D4EFD9

  • install_name

    Update.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WindowsUpdate

  • subdirectory

    Windows Update

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Enumerates system info in registry 2 TTPs 3 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 26 IoCs
  • Suspicious use of SendNotifyMessage 24 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

Processes

  • C:\Users\Admin\AppData\Local\Temp\SynapseX Revamped V1.5\SynapseXBootstrapper.exe
    "C:\Users\Admin\AppData\Local\Temp\SynapseX Revamped V1.5\SynapseXBootstrapper.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4572
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:1436
    • C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe
      "C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1820
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "WindowsUpdate" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:1876
  • C:\Windows\System32\svchost.exe
    C:\Windows\System32\svchost.exe -k UnistackSvcGroup
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:3500
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --profile-directory=Default
    1⤵
    • Enumerates system info in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: NtCreateUserProcessBlockNonMicrosoftBinary
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1276
    • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
      "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=crashpad-handler "--user-data-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" /prefetch:7 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad" "--metrics-dir=C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data" --annotation=IsOfficialBuild=1 --annotation=channel= --annotation=chromium-version=92.0.4515.131 "--annotation=exe=C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --annotation=plat=Win64 "--annotation=prod=Microsoft Edge" --annotation=ver=92.0.902.67 --initial-client-data=0x11c,0x120,0x124,0xf8,0x128,0x7ffc00a046f8,0x7ffc00a04708,0x7ffc00a04718
      2⤵
        PID:3704
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=gpu-process --field-trial-handle=2152,14748075775162264916,1038877916641964821,131072 --gpu-preferences=UAAAAAAAAADgAAAQAAAAAAAAAAAAAAAAAABgAAAAAAAwAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAHgAAAAAAAAAeAAAAAAAAAAoAAAABAAAACAAAAAAAAAAKAAAAAAAAAAwAAAAAAAAADgAAAAAAAAAEAAAAAAAAAAAAAAADQAAABAAAAAAAAAAAQAAAA0AAAAQAAAAAAAAAAQAAAANAAAAEAAAAAAAAAAHAAAADQAAAAgAAAAAAAAACAAAAAAAAAA= --mojo-platform-channel-handle=2176 /prefetch:2
        2⤵
          PID:5008
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=network.mojom.NetworkService --field-trial-handle=2152,14748075775162264916,1038877916641964821,131072 --lang=en-US --service-sandbox-type=none --mojo-platform-channel-handle=2240 /prefetch:3
          2⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3772
        • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
          "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=storage.mojom.StorageService --field-trial-handle=2152,14748075775162264916,1038877916641964821,131072 --lang=en-US --service-sandbox-type=utility --mojo-platform-channel-handle=2744 /prefetch:8
          2⤵
            PID:1740
          • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
            "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2152,14748075775162264916,1038877916641964821,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=6 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3420 /prefetch:1
            2⤵
              PID:3488
            • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
              "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2152,14748075775162264916,1038877916641964821,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=5 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=3428 /prefetch:1
              2⤵
                PID:3940
              • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2152,14748075775162264916,1038877916641964821,131072 --lang=en-US --disable-client-side-phishing-detection --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=7 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=4156 /prefetch:1
                2⤵
                  PID:3608
                • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
                  "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=renderer --field-trial-handle=2152,14748075775162264916,1038877916641964821,131072 --lang=en-US --disable-client-side-phishing-detection --instant-process --device-scale-factor=1 --num-raster-threads=4 --enable-main-frame-before-activation --renderer-client-id=8 --no-v8-untrusted-code-mitigations --mojo-platform-channel-handle=5144 /prefetch:1
                  2⤵
                    PID:2636
                • C:\Windows\System32\CompPkgSrv.exe
                  C:\Windows\System32\CompPkgSrv.exe -Embedding
                  1⤵
                    PID:4064
                  • C:\Windows\System32\CompPkgSrv.exe
                    C:\Windows\System32\CompPkgSrv.exe -Embedding
                    1⤵
                      PID:4476

                    Network

                          MITRE ATT&CK Enterprise v15

                          Replay Monitor

                          Loading Replay Monitor...

                          Downloads

                          settings.dat

                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat
                          • Size 152B
                          • SHA256 354de4b033ba6e4d85f94d91230cb8501f62e0a4e302cd4076c7e0ad73bedbd1
                          • MD5 SHA1 SHA512

                          settings.dat

                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Crashpad\settings.dat
                          • Size 152B
                          • SHA256 bce2dfaa91f0d44e977e0f79c60e64954a7b9dc828b0e30fbaa67dbe82f750aa
                          • MD5 SHA1 SHA512

                          data_1

                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\GPUCache\data_1
                          • Size 264KB
                          • SHA256 b1e963d702392fb7224786e7d56d43973e9b9efd1b89c17814d7c558ffc0cdec
                          • MD5 SHA1 SHA512 SSDEEP

                          Preferences

                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences
                          • Size 5KB
                          • SHA256 f61ceddbbb3c89b96f0a1ce321fe9da83569a5914fcccd1dde848e438cc785be
                          • MD5 SHA1 SHA512 SSDEEP

                          Preferences

                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Default\Preferences
                          • Size 6KB
                          • SHA256 474ee645c73c81d3e47ee9d35b5c0545fe096bd1c23e0b38d94f949bf513eb12
                          • MD5 SHA1 SHA512 SSDEEP

                          Local State

                          • Path C:\Users\Admin\AppData\Local\Microsoft\Edge\User Data\Local State
                          • Size 11KB
                          • SHA256 53a2ccf1c570b466b9d7752be6043d9a11419a3c1b96c513f09e17108b894e12
                          • MD5 SHA1 SHA512 SSDEEP

                          Update.exe

                          • Path C:\Users\Admin\AppData\Roaming\Windows Update\Update.exe
                          • Size 3.1MB
                          • SHA256 de29011246319ec8b60774d8c4cad4e8299e27eba6dc7699cd257fbdda338336
                          • MD5 SHA1 SHA512 SSDEEP

                          memory/1820-11-0x00007FFC0ADF0000-0x00007FFC0B8B1000-memory.dmp

                          memory/1820-14-0x00007FFC0ADF0000-0x00007FFC0B8B1000-memory.dmp

                          memory/1820-13-0x000000001BBE0000-0x000000001BC92000-memory.dmp

                          memory/1820-12-0x000000001BAD0000-0x000000001BB20000-memory.dmp

                          memory/1820-10-0x00007FFC0ADF0000-0x00007FFC0B8B1000-memory.dmp

                          memory/3500-53-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-64-0x00000244E6F20000-0x00000244E6F21000-memory.dmp

                          memory/3500-50-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-51-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-52-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-15-0x00000244DEC40000-0x00000244DEC50000-memory.dmp

                          memory/3500-54-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-55-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-56-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-57-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-59-0x00000244E6F20000-0x00000244E6F21000-memory.dmp

                          memory/3500-58-0x00000244E6F30000-0x00000244E6F31000-memory.dmp

                          memory/3500-61-0x00000244E6F30000-0x00000244E6F31000-memory.dmp

                          memory/3500-49-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-67-0x00000244E6E60000-0x00000244E6E61000-memory.dmp

                          memory/3500-79-0x00000244E7060000-0x00000244E7061000-memory.dmp

                          memory/3500-81-0x00000244E7070000-0x00000244E7071000-memory.dmp

                          memory/3500-82-0x00000244E7070000-0x00000244E7071000-memory.dmp

                          memory/3500-83-0x00000244E7180000-0x00000244E7181000-memory.dmp

                          memory/3500-48-0x00000244E7310000-0x00000244E7311000-memory.dmp

                          memory/3500-47-0x00000244E72E0000-0x00000244E72E1000-memory.dmp

                          memory/3500-31-0x00000244DED40000-0x00000244DED50000-memory.dmp

                          memory/4572-0-0x00007FFC0ADF3000-0x00007FFC0ADF5000-memory.dmp

                          memory/4572-9-0x00007FFC0ADF0000-0x00007FFC0B8B1000-memory.dmp

                          memory/4572-2-0x00007FFC0ADF0000-0x00007FFC0B8B1000-memory.dmp

                          memory/4572-1-0x0000000000510000-0x0000000000834000-memory.dmp