Analysis

  • max time kernel
    19s
  • max time network
    160s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    01/07/2024, 02:57

General

  • Target
    a83e969ffc192231f2690fab578e9767.exe
  • Size 3.1MB
  • Sample240701-df2hhatgmh
  • SHA256 98434fe3c17f66fea234631199b6ba3c4b472b52fbcf66b2f0329866b08fd797
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Attributes
  • reconnect_delay

    3000

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • pringelsy-36149.portmap.host:36149

Mutex
  • 63621aac-ae17-49da-9413-459827e68061

Attributes
  • encryption_key

    4F2985A1DF21C9CA0E34D9186E1BC62AF4B58C14

  • 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 5 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Runs ping.exe 1 TTPs 11 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 12 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 6 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\a83e969ffc192231f2690fab578e9767.exe
    "C:\Users\Admin\AppData\Local\Temp\a83e969ffc192231f2690fab578e9767.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3016
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:3060
    • C:\Windows\system32\SubDir\Client.exe
      "C:\Windows\system32\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:3800
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5056
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\iyc4CDJhh5FN.bat" "
        3⤵
          PID:1660
          • C:\Windows\system32\chcp.com
            chcp 65001
            4⤵
              PID:3784
            • C:\Windows\system32\PING.EXE
              ping -n 10 localhost
              4⤵
              • Runs ping.exe
              PID:844
            • C:\Windows\system32\SubDir\Client.exe
              "C:\Windows\system32\SubDir\Client.exe"
              4⤵
                PID:2900
                • C:\Windows\SYSTEM32\schtasks.exe
                  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                  5⤵
                  • Scheduled Task/Job: Scheduled Task
                  PID:4892
                • C:\Windows\system32\cmd.exe
                  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\0uzHdfC3JxFD.bat" "
                  5⤵
                    PID:4220
                    • C:\Windows\system32\chcp.com
                      chcp 65001
                      6⤵
                        PID:3552
                      • C:\Windows\system32\PING.EXE
                        ping -n 10 localhost
                        6⤵
                        • Runs ping.exe
                        PID:3688
                      • C:\Windows\system32\SubDir\Client.exe
                        "C:\Windows\system32\SubDir\Client.exe"
                        6⤵
                          PID:3604
                          • C:\Windows\SYSTEM32\schtasks.exe
                            "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                            7⤵
                            • Scheduled Task/Job: Scheduled Task
                            PID:3016
                          • C:\Windows\system32\cmd.exe
                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\bizz3SmaOd4o.bat" "
                            7⤵
                              PID:2180
                              • C:\Windows\system32\chcp.com
                                chcp 65001
                                8⤵
                                  PID:4072
                                • C:\Windows\system32\PING.EXE
                                  ping -n 10 localhost
                                  8⤵
                                  • Runs ping.exe
                                  PID:5096
                                • C:\Windows\system32\SubDir\Client.exe
                                  "C:\Windows\system32\SubDir\Client.exe"
                                  8⤵
                                    PID:4576
                                    • C:\Windows\SYSTEM32\schtasks.exe
                                      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                      9⤵
                                      • Scheduled Task/Job: Scheduled Task
                                      PID:844
                                    • C:\Windows\system32\cmd.exe
                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\pOsqoGoITrUW.bat" "
                                      9⤵
                                        PID:1880
                                        • C:\Windows\system32\chcp.com
                                          chcp 65001
                                          10⤵
                                            PID:4892
                                          • C:\Windows\system32\PING.EXE
                                            ping -n 10 localhost
                                            10⤵
                                            • Runs ping.exe
                                            PID:3852
                                          • C:\Windows\system32\SubDir\Client.exe
                                            "C:\Windows\system32\SubDir\Client.exe"
                                            10⤵
                                              PID:3552
                                              • C:\Windows\SYSTEM32\schtasks.exe
                                                "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                11⤵
                                                • Scheduled Task/Job: Scheduled Task
                                                PID:2792
                                              • C:\Windows\system32\cmd.exe
                                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\n832qirbF9HR.bat" "
                                                11⤵
                                                  PID:3504
                                                  • C:\Windows\system32\chcp.com
                                                    chcp 65001
                                                    12⤵
                                                      PID:4916
                                                    • C:\Windows\system32\PING.EXE
                                                      ping -n 10 localhost
                                                      12⤵
                                                      • Runs ping.exe
                                                      PID:3400
                                                    • C:\Windows\system32\SubDir\Client.exe
                                                      "C:\Windows\system32\SubDir\Client.exe"
                                                      12⤵
                                                        PID:4356
                                                        • C:\Windows\SYSTEM32\schtasks.exe
                                                          "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                          13⤵
                                                          • Scheduled Task/Job: Scheduled Task
                                                          PID:4672
                                                        • C:\Windows\system32\cmd.exe
                                                          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\rlS4gyJ4KqTk.bat" "
                                                          13⤵
                                                            PID:2832
                                                            • C:\Windows\system32\chcp.com
                                                              chcp 65001
                                                              14⤵
                                                                PID:1268
                                                              • C:\Windows\system32\PING.EXE
                                                                ping -n 10 localhost
                                                                14⤵
                                                                • Runs ping.exe
                                                                PID:1976
                                                              • C:\Windows\system32\SubDir\Client.exe
                                                                "C:\Windows\system32\SubDir\Client.exe"
                                                                14⤵
                                                                  PID:3460
                                                                  • C:\Windows\SYSTEM32\schtasks.exe
                                                                    "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                                    15⤵
                                                                    • Scheduled Task/Job: Scheduled Task
                                                                    PID:1428
                                                                  • C:\Windows\system32\cmd.exe
                                                                    C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\cBKVd7e3HsrQ.bat" "
                                                                    15⤵
                                                                      PID:4476
                                                                      • C:\Windows\system32\chcp.com
                                                                        chcp 65001
                                                                        16⤵
                                                                          PID:2480
                                                                        • C:\Windows\system32\PING.EXE
                                                                          ping -n 10 localhost
                                                                          16⤵
                                                                          • Runs ping.exe
                                                                          PID:2800
                                                                        • C:\Windows\system32\SubDir\Client.exe
                                                                          "C:\Windows\system32\SubDir\Client.exe"
                                                                          16⤵
                                                                            PID:3656
                                                                            • C:\Windows\SYSTEM32\schtasks.exe
                                                                              "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                                              17⤵
                                                                              • Scheduled Task/Job: Scheduled Task
                                                                              PID:4440
                                                                            • C:\Windows\system32\cmd.exe
                                                                              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\3t6GiSEYDxD9.bat" "
                                                                              17⤵
                                                                                PID:1444
                                                                                • C:\Windows\system32\chcp.com
                                                                                  chcp 65001
                                                                                  18⤵
                                                                                    PID:2436
                                                                                  • C:\Windows\system32\PING.EXE
                                                                                    ping -n 10 localhost
                                                                                    18⤵
                                                                                    • Runs ping.exe
                                                                                    PID:4432
                                                                                  • C:\Windows\system32\SubDir\Client.exe
                                                                                    "C:\Windows\system32\SubDir\Client.exe"
                                                                                    18⤵
                                                                                      PID:5040
                                                                                      • C:\Windows\SYSTEM32\schtasks.exe
                                                                                        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                                                        19⤵
                                                                                        • Scheduled Task/Job: Scheduled Task
                                                                                        PID:4420
                                                                                      • C:\Windows\system32\cmd.exe
                                                                                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\rymWDmZxoJ0z.bat" "
                                                                                        19⤵
                                                                                          PID:2812
                                                                                          • C:\Windows\system32\chcp.com
                                                                                            chcp 65001
                                                                                            20⤵
                                                                                              PID:3992
                                                                                            • C:\Windows\system32\PING.EXE
                                                                                              ping -n 10 localhost
                                                                                              20⤵
                                                                                              • Runs ping.exe
                                                                                              PID:3556
                                                                                            • C:\Windows\system32\SubDir\Client.exe
                                                                                              "C:\Windows\system32\SubDir\Client.exe"
                                                                                              20⤵
                                                                                                PID:1228
                                                                                                • C:\Windows\SYSTEM32\schtasks.exe
                                                                                                  "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                                                                  21⤵
                                                                                                  • Scheduled Task/Job: Scheduled Task
                                                                                                  PID:4924
                                                                                                • C:\Windows\system32\cmd.exe
                                                                                                  C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\BcZ1Xo5EHiMi.bat" "
                                                                                                  21⤵
                                                                                                    PID:1428
                                                                                                    • C:\Windows\system32\chcp.com
                                                                                                      chcp 65001
                                                                                                      22⤵
                                                                                                        PID:2588
                                                                                                      • C:\Windows\system32\PING.EXE
                                                                                                        ping -n 10 localhost
                                                                                                        22⤵
                                                                                                        • Runs ping.exe
                                                                                                        PID:1816
                                                                                                      • C:\Windows\system32\SubDir\Client.exe
                                                                                                        "C:\Windows\system32\SubDir\Client.exe"
                                                                                                        22⤵
                                                                                                          PID:4732
                                                                                                          • C:\Windows\SYSTEM32\schtasks.exe
                                                                                                            "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
                                                                                                            23⤵
                                                                                                            • Scheduled Task/Job: Scheduled Task
                                                                                                            PID:184
                                                                                                          • C:\Windows\system32\cmd.exe
                                                                                                            C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\2i2dRbzDwA9T.bat" "
                                                                                                            23⤵
                                                                                                              PID:3152
                                                                                                              • C:\Windows\system32\chcp.com
                                                                                                                chcp 65001
                                                                                                                24⤵
                                                                                                                  PID:1072
                                                                                                                • C:\Windows\system32\PING.EXE
                                                                                                                  ping -n 10 localhost
                                                                                                                  24⤵
                                                                                                                  • Runs ping.exe
                                                                                                                  PID:1288
                                                                  • 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=4060 --field-trial-handle=2328,i,5873823382323802923,13134441441264702821,262144 --variations-seed-version /prefetch:8
                                                                    1⤵
                                                                      PID:2536

                                                                    Network

                                                                          MITRE ATT&CK Enterprise v15

                                                                          Replay Monitor

                                                                          Loading Replay Monitor...

                                                                          Downloads

                                                                          Client.exe.log

                                                                          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Client.exe.log
                                                                          • Size 2KB
                                                                          • SHA256 da740d78ae00b72cb3710d1a1256dc6431550965d20afaa65e5d5860a4748e8c
                                                                          • MD5 SHA1 SHA512

                                                                          0uzHdfC3JxFD.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\0uzHdfC3JxFD.bat
                                                                          • Size 196B
                                                                          • SHA256 d1d97a5eebf92df9bf2aa7771166383728882c640359076412ef67ad74fd9b69
                                                                          • MD5 SHA1 SHA512

                                                                          2i2dRbzDwA9T.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\2i2dRbzDwA9T.bat
                                                                          • Size 196B
                                                                          • SHA256 f59908b4c3409b5630c0400a86311d6f30ed424c3524e815d840928add62ebb6
                                                                          • MD5 SHA1 SHA512

                                                                          3t6GiSEYDxD9.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\3t6GiSEYDxD9.bat
                                                                          • Size 196B
                                                                          • SHA256 79a73d44ec353c8318ba4932509b2b9346a9d5e6f1ace4f9a5119555e7107772
                                                                          • MD5 SHA1 SHA512

                                                                          BcZ1Xo5EHiMi.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\BcZ1Xo5EHiMi.bat
                                                                          • Size 196B
                                                                          • SHA256 f2bb416af5e0a8744305df7f654ad873e19bf7a4f39cb4df5ba2bcca079e7e98
                                                                          • MD5 SHA1 SHA512

                                                                          bizz3SmaOd4o.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\bizz3SmaOd4o.bat
                                                                          • Size 196B
                                                                          • SHA256 11755191d4f020f05d9ee3d5a6b7c4463da3b3fa46c89c0a69127e604b699865
                                                                          • MD5 SHA1 SHA512

                                                                          cBKVd7e3HsrQ.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\cBKVd7e3HsrQ.bat
                                                                          • Size 196B
                                                                          • SHA256 1b28b2b28e1cba0636c826e0e2b83e72b2fc5eb2be41e86ccaa8afcdc0632259
                                                                          • MD5 SHA1 SHA512

                                                                          iyc4CDJhh5FN.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\iyc4CDJhh5FN.bat
                                                                          • Size 196B
                                                                          • SHA256 269b575b8c0591ce4643c5cde559644120184a6b3cbce4b5c1e4cf06edff0f14
                                                                          • MD5 SHA1 SHA512

                                                                          n832qirbF9HR.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\n832qirbF9HR.bat
                                                                          • Size 196B
                                                                          • SHA256 9f7720a20f4997cf424250c966597fb3449ca434f9eac5593fdfecf643783a57
                                                                          • MD5 SHA1 SHA512

                                                                          pOsqoGoITrUW.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\pOsqoGoITrUW.bat
                                                                          • Size 196B
                                                                          • SHA256 96b8737cc79976a81771aaf309c9abf953bd53c1ee0370753cb5318dcc024284
                                                                          • MD5 SHA1 SHA512

                                                                          rlS4gyJ4KqTk.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\rlS4gyJ4KqTk.bat
                                                                          • Size 196B
                                                                          • SHA256 ffb2fab3b996c96beedb716b4c4989ad76dee2d6249e8c37ec60226b194238ff
                                                                          • MD5 SHA1 SHA512

                                                                          rymWDmZxoJ0z.bat

                                                                          • Path C:\Users\Admin\AppData\Local\Temp\rymWDmZxoJ0z.bat
                                                                          • Size 196B
                                                                          • SHA256 f6497a6100cb5dc1ad701519858a51346702f69ac8383daa154be9ca5f2816fe
                                                                          • MD5 SHA1 SHA512

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 2.8MB
                                                                          • SHA256 057a8d12ce4cba1bc737404dd493a8d5368d5979c656dbce73aae5d520c1d8bc
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 2.4MB
                                                                          • SHA256 2b1e51b1f50effc71c88d2083d48d93c789c100e5ff6d765d02e506547f4569b
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 2.4MB
                                                                          • SHA256 19caa35d69f31a93ed4afc43caea5a0021c6cf7cc25e5854de7faea7fbfb382d
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 1.7MB
                                                                          • SHA256 0bfa97516e4f563849fd916e860c9a66faa07506deda631f2627a10b694ddab9
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 1.5MB
                                                                          • SHA256 92130f81cc0c05f9afe5dd672ed2e8feff8aac75278348fedfdc5244dc906287
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 1.3MB
                                                                          • SHA256 ad764b9ca52a5f44c3a4cd1c3669807c18f17481d48c7efc518daab0bad94e8b
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 1.1MB
                                                                          • SHA256 2fc2d290e80aa820f4358e305e0fc4a87a1033909a896728244056ec4597ede3
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 921KB
                                                                          • SHA256 4250a8327e0d1455289bec1ea0e9c9e20d790051962e704fdb1acd0ffd4c5f2d
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 3.1MB
                                                                          • SHA256 98434fe3c17f66fea234631199b6ba3c4b472b52fbcf66b2f0329866b08fd797
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 332KB
                                                                          • SHA256 8945861b220abbb6ea9d487bfad85c5bb23a5f51f9fce87c228230907d63c30a
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          Client.exe

                                                                          • Path C:\Windows\System32\SubDir\Client.exe
                                                                          • Size 177KB
                                                                          • SHA256 005d764780f8e828b740dcef1e8e1192ddf65d1eaa4c4be26e6e892bae1466e6
                                                                          • MD5 SHA1 SHA512 SSDEEP

                                                                          memory/3016-10-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

                                                                          memory/3016-0-0x00007FFCE8BB3000-0x00007FFCE8BB5000-memory.dmp

                                                                          memory/3016-2-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

                                                                          memory/3016-1-0x0000000000AF0000-0x0000000000E14000-memory.dmp

                                                                          memory/3800-19-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

                                                                          memory/3800-9-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

                                                                          memory/3800-11-0x00007FFCE8BB0000-0x00007FFCE9671000-memory.dmp

                                                                          memory/3800-12-0x000000001C0B0000-0x000000001C100000-memory.dmp

                                                                          memory/3800-13-0x000000001C1C0000-0x000000001C272000-memory.dmp