Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    09/11/2026, 07:42

General

  • Target
    newsletterdemo.sakhihosting.in.exe
  • Size 3.1MB
  • Sample261109-jjqs3adf39
  • SHA256 4177f83fafea181926ad37a733cadb007f00d7742002fd3eaf1609075dbf585b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • newsletterdemo.sakhihosting.in:443

  • www.newsletterdemo.sakhihosting.in:443

  • newsletterdemo.sakhihosting.in:80

  • www.newsletterdemo.sakhihosting.in:80

Mutex
  • 9b186ab5-2f81-485c-a8c3-de94cee22494

Attributes
  • encryption_key

    ED3227F773701D05083B11A65776F95F93EEEF5E

  • install_name

    Client.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Family: Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 2 IoCs
  • Executes a command shell one-liner 1 TTPs 10 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 10 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 10 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 11 IoCs

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

  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 2 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\newsletterdemo.sakhihosting.in.exe
    "C:\Users\Admin\AppData\Local\Temp\newsletterdemo.sakhihosting.in.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1732
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2360
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      PID:2588
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3816
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\uGZYw6zD4gZA.bat" "
        3⤵
        • Executes a command shell one-liner
        PID:1880
        • C:\Windows\system32\chcp.com
          chcp 65001
          4⤵
            PID:3780
          • C:\Windows\system32\PING.EXE
            ping -n 10 localhost
            4⤵
            • System Network Configuration Discovery: Internet Connection Discovery
            • Runs ping.exe
            PID:4836
          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
            "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
            4⤵
              PID:5004
              • C:\Windows\SYSTEM32\schtasks.exe
                "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                5⤵
                • Scheduled Task/Job: Scheduled Task
                PID:5560
              • C:\Windows\system32\cmd.exe
                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\PEuwNzbicUK2.bat" "
                5⤵
                • Executes a command shell one-liner
                PID:3656
                • C:\Windows\system32\chcp.com
                  chcp 65001
                  6⤵
                    PID:1200
                  • C:\Windows\system32\PING.EXE
                    ping -n 10 localhost
                    6⤵
                    • System Network Configuration Discovery: Internet Connection Discovery
                    • Runs ping.exe
                    PID:2648
                  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                    6⤵
                      PID:5804
                      • C:\Windows\SYSTEM32\schtasks.exe
                        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                        7⤵
                        • Scheduled Task/Job: Scheduled Task
                        PID:4376
                      • C:\Windows\system32\cmd.exe
                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\NJrveBzqoBJ8.bat" "
                        7⤵
                        • Executes a command shell one-liner
                        PID:5996
                        • C:\Windows\system32\chcp.com
                          chcp 65001
                          8⤵
                            PID:1108
                          • C:\Windows\system32\PING.EXE
                            ping -n 10 localhost
                            8⤵
                            • System Network Configuration Discovery: Internet Connection Discovery
                            • Runs ping.exe
                            PID:4772
                          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                            "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                            8⤵
                              PID:3612
                              • C:\Windows\SYSTEM32\schtasks.exe
                                "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                9⤵
                                • Scheduled Task/Job: Scheduled Task
                                PID:5748
                              • C:\Windows\system32\cmd.exe
                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\JG3VGhTf7UJq.bat" "
                                9⤵
                                • Executes a command shell one-liner
                                PID:4776
                                • C:\Windows\system32\chcp.com
                                  chcp 65001
                                  10⤵
                                    PID:2220
                                  • C:\Windows\system32\PING.EXE
                                    ping -n 10 localhost
                                    10⤵
                                    • System Network Configuration Discovery: Internet Connection Discovery
                                    • Runs ping.exe
                                    PID:4884
                                  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                    10⤵
                                      PID:3924
                                      • C:\Windows\SYSTEM32\schtasks.exe
                                        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                        11⤵
                                        • Scheduled Task/Job: Scheduled Task
                                        PID:2100
                                      • C:\Windows\system32\cmd.exe
                                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\WiiMNdN7ADGr.bat" "
                                        11⤵
                                        • Executes a command shell one-liner
                                        PID:712
                                        • C:\Windows\system32\chcp.com
                                          chcp 65001
                                          12⤵
                                            PID:4424
                                          • C:\Windows\system32\PING.EXE
                                            ping -n 10 localhost
                                            12⤵
                                            • System Network Configuration Discovery: Internet Connection Discovery
                                            • Runs ping.exe
                                            PID:5244
                                          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                            "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                            12⤵
                                              PID:1464
                                              • C:\Windows\SYSTEM32\schtasks.exe
                                                "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                13⤵
                                                • Scheduled Task/Job: Scheduled Task
                                                PID:1612
                                              • C:\Windows\system32\cmd.exe
                                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\A6GgLS3EQCVn.bat" "
                                                13⤵
                                                • Executes a command shell one-liner
                                                PID:4384
                                                • C:\Windows\system32\chcp.com
                                                  chcp 65001
                                                  14⤵
                                                    PID:4580
                                                  • C:\Windows\system32\PING.EXE
                                                    ping -n 10 localhost
                                                    14⤵
                                                    • System Network Configuration Discovery: Internet Connection Discovery
                                                    • Runs ping.exe
                                                    PID:128
                                                  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                    14⤵
                                                      PID:5500
                                                      • C:\Windows\SYSTEM32\schtasks.exe
                                                        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                        15⤵
                                                        • Scheduled Task/Job: Scheduled Task
                                                        PID:3484
                                                      • C:\Windows\system32\cmd.exe
                                                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\dXdEYLlAhZg0.bat" "
                                                        15⤵
                                                        • Executes a command shell one-liner
                                                        PID:1172
                                                        • C:\Windows\system32\chcp.com
                                                          chcp 65001
                                                          16⤵
                                                            PID:5348
                                                          • C:\Windows\system32\PING.EXE
                                                            ping -n 10 localhost
                                                            16⤵
                                                            • System Network Configuration Discovery: Internet Connection Discovery
                                                            • Runs ping.exe
                                                            PID:4124
                                                          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                            "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                            16⤵
                                                              PID:4748
                                                              • C:\Windows\SYSTEM32\schtasks.exe
                                                                "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                                17⤵
                                                                • Scheduled Task/Job: Scheduled Task
                                                                PID:4284
                                                              • C:\Windows\system32\cmd.exe
                                                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\WrxY3e9XG90y.bat" "
                                                                17⤵
                                                                • Executes a command shell one-liner
                                                                PID:3228
                                                                • C:\Windows\system32\chcp.com
                                                                  chcp 65001
                                                                  18⤵
                                                                    PID:3828
                                                                  • C:\Windows\system32\PING.EXE
                                                                    ping -n 10 localhost
                                                                    18⤵
                                                                    • System Network Configuration Discovery: Internet Connection Discovery
                                                                    • Runs ping.exe
                                                                    PID:5252
                                                                  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                                    "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                                    18⤵
                                                                      PID:4272
                                                                      • C:\Windows\SYSTEM32\schtasks.exe
                                                                        "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                                        19⤵
                                                                        • Scheduled Task/Job: Scheduled Task
                                                                        PID:1376
                                                                      • C:\Windows\system32\cmd.exe
                                                                        C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\zq6JScoH5hiM.bat" "
                                                                        19⤵
                                                                        • Executes a command shell one-liner
                                                                        PID:3000
                                                                        • C:\Windows\system32\chcp.com
                                                                          chcp 65001
                                                                          20⤵
                                                                            PID:5984
                                                                          • C:\Windows\system32\PING.EXE
                                                                            ping -n 10 localhost
                                                                            20⤵
                                                                            • System Network Configuration Discovery: Internet Connection Discovery
                                                                            • Runs ping.exe
                                                                            PID:4688
                                                                          • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                                            "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                                            20⤵
                                                                              PID:5076
                                                                              • C:\Windows\SYSTEM32\schtasks.exe
                                                                                "schtasks" /create /tn "Quasar Client Startup" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
                                                                                21⤵
                                                                                • Scheduled Task/Job: Scheduled Task
                                                                                PID:4136
                                                                              • C:\Windows\system32\cmd.exe
                                                                                C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\4D0zniY1C7bn.bat" "
                                                                                21⤵
                                                                                • Executes a command shell one-liner
                                                                                PID:5920
                                                                                • C:\Windows\system32\chcp.com
                                                                                  chcp 65001
                                                                                  22⤵
                                                                                    PID:1692
                                                                                  • C:\Windows\system32\PING.EXE
                                                                                    ping -n 10 localhost
                                                                                    22⤵
                                                                                    • System Network Configuration Discovery: Internet Connection Discovery
                                                                                    • Runs ping.exe
                                                                                    PID:6040
                                        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                          C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                          1⤵
                                          • Executes dropped EXE
                                          • Suspicious use of AdjustPrivilegeToken
                                          PID:4304

                                        Network

                                              MITRE ATT&CK Enterprise v16

                                              Replay Monitor

                                              Loading Replay Monitor...

                                              Downloads

                                              4D0zniY1C7bn.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\4D0zniY1C7bn.bat
                                              • Size 207B
                                              • SHA256 7e3327dd44f049c0d9b1cfd07e0333e1105a822089aecf2aff549ede83cd771e
                                              • MD5 SHA1 SHA512 TLSH

                                              A6GgLS3EQCVn.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\A6GgLS3EQCVn.bat
                                              • Size 207B
                                              • SHA256 527d42451ce04c6a1ece82d038b47a57c6ae99c1bb57c4d0db75c70e05471ae8
                                              • MD5 SHA1 SHA512 TLSH

                                              JG3VGhTf7UJq.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\JG3VGhTf7UJq.bat
                                              • Size 207B
                                              • SHA256 0860e92fdb959e008de467ed6a056edfbe8c1d93bdaed3d7eabb2edc2d3f6332
                                              • MD5 SHA1 SHA512 TLSH

                                              NJrveBzqoBJ8.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\NJrveBzqoBJ8.bat
                                              • Size 207B
                                              • SHA256 306b30960c520e6047c84007780b4c6b02ff4bba4bfb63e5c3a203770afdba7c
                                              • MD5 SHA1 SHA512 TLSH

                                              PEuwNzbicUK2.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\PEuwNzbicUK2.bat
                                              • Size 207B
                                              • SHA256 75ecc90c2a170ebff0d85b3df62146ef99622c8596c237631baf8eed42790002
                                              • MD5 SHA1 SHA512 TLSH

                                              WiiMNdN7ADGr.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\WiiMNdN7ADGr.bat
                                              • Size 207B
                                              • SHA256 dbc2e4307bd359164a3649fab70ff8bab98a41ba8a6d7dcaf14d424576b91a50
                                              • MD5 SHA1 SHA512 TLSH

                                              WrxY3e9XG90y.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\WrxY3e9XG90y.bat
                                              • Size 207B
                                              • SHA256 3a1c13b2ffb59d5ec8ba6b259bb7c428334aeda532b4d94b4100878b7708c44e
                                              • MD5 SHA1 SHA512 TLSH

                                              dXdEYLlAhZg0.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\dXdEYLlAhZg0.bat
                                              • Size 207B
                                              • SHA256 252d46ab0799f05814043f5ce8a304366ae638ca0ddf67e83df1685a1ceccec7
                                              • MD5 SHA1 SHA512 TLSH

                                              uGZYw6zD4gZA.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\uGZYw6zD4gZA.bat
                                              • Size 207B
                                              • SHA256 77fab081bd1055ebaf95a1691ce664a91e8f28d5a246f8f3d9a648b5c79f3b27
                                              • MD5 SHA1 SHA512 TLSH

                                              zq6JScoH5hiM.bat

                                              • Path C:\Users\Admin\AppData\Local\Temp\zq6JScoH5hiM.bat
                                              • Size 207B
                                              • SHA256 29c685f4dae9b8a58e488b6dc80653404f013a18d758656056fdc86bfe53c596
                                              • MD5 SHA1 SHA512 TLSH

                                              Client.exe

                                              • Path C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                              • Size 3.1MB
                                              • SHA256 4177f83fafea181926ad37a733cadb007f00d7742002fd3eaf1609075dbf585b
                                              • MD5 SHA1 SHA512 SSDEEP TLSH

                                              memory/1732-12-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-20-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-13-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-10-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-9-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-8-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-7-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-11-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-6-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-0-0x00007FFE7C94F000-0x00007FFE7C950000-memory.dmp

                                              memory/1732-5-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-4-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-3-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/1732-1-0x00000000002E0000-0x0000000000604000-memory.dmp

                                              memory/1732-2-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-22-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-26-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-28-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-29-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-31-0x000000001CE60000-0x000000001CEB0000-memory.dmp

                                              memory/2588-32-0x000000001CF70000-0x000000001D022000-memory.dmp

                                              memory/2588-27-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-39-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-19-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-25-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-24-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-23-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-21-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-18-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-17-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-16-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp

                                              memory/2588-15-0x00007FFE7C7C0000-0x00007FFE7D164000-memory.dmp