Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    27/10/2026, 13:29

General

  • Target
    ok8386.wine.exe
  • Size 3.1MB
  • Sample261027-qrn3rses9n
  • SHA256 d726a1148580f673427f68a823e6c08c319d7d0f389b4dad599cb38d8564628b
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • ok8386.wine:443

  • www.ok8386.wine:443

  • ok8386.wine:80

  • www.ok8386.wine:80

Mutex
  • f4c64195-fa1d-4409-bf3e-caead00e7068

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 9 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 9 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 9 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\ok8386.wine.exe
    "C:\Users\Admin\AppData\Local\Temp\ok8386.wine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4964
    • 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:1904
    • 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:4948
  • 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:4200
    • 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:4560
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\MUQmDkkjSwqd.bat" "
      2⤵
      • Executes a command shell one-liner
      PID:1144
      • C:\Windows\system32\chcp.com
        chcp 65001
        3⤵
          PID:1880
        • C:\Windows\system32\PING.EXE
          ping -n 10 localhost
          3⤵
          • System Network Configuration Discovery: Internet Connection Discovery
          • Runs ping.exe
          PID:2584
        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
          3⤵
            PID:920
            • 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
              4⤵
              • Scheduled Task/Job: Scheduled Task
              PID:4716
            • C:\Windows\system32\cmd.exe
              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\dmXU24JzXjoY.bat" "
              4⤵
              • Executes a command shell one-liner
              PID:2060
              • C:\Windows\system32\chcp.com
                chcp 65001
                5⤵
                  PID:3740
                • C:\Windows\system32\PING.EXE
                  ping -n 10 localhost
                  5⤵
                  • System Network Configuration Discovery: Internet Connection Discovery
                  • Runs ping.exe
                  PID:4160
                • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                  5⤵
                    PID:2340
                    • 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
                      6⤵
                      • Scheduled Task/Job: Scheduled Task
                      PID:924
                    • C:\Windows\system32\cmd.exe
                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\AL7kXUSF1Pni.bat" "
                      6⤵
                      • Executes a command shell one-liner
                      PID:2064
                      • C:\Windows\system32\chcp.com
                        chcp 65001
                        7⤵
                          PID:1076
                        • C:\Windows\system32\PING.EXE
                          ping -n 10 localhost
                          7⤵
                          • System Network Configuration Discovery: Internet Connection Discovery
                          • Runs ping.exe
                          PID:2084
                        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                          7⤵
                            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
                              8⤵
                              • Scheduled Task/Job: Scheduled Task
                              PID:6008
                            • C:\Windows\system32\cmd.exe
                              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tnvHn5a0Y531.bat" "
                              8⤵
                              • Executes a command shell one-liner
                              PID:5776
                              • C:\Windows\system32\chcp.com
                                chcp 65001
                                9⤵
                                  PID:1864
                                • C:\Windows\system32\PING.EXE
                                  ping -n 10 localhost
                                  9⤵
                                  • System Network Configuration Discovery: Internet Connection Discovery
                                  • Runs ping.exe
                                  PID:2548
                                • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                  9⤵
                                    PID:1404
                                    • 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
                                      10⤵
                                      • Scheduled Task/Job: Scheduled Task
                                      PID:3964
                                    • C:\Windows\system32\cmd.exe
                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\pR4RQZNOEFHt.bat" "
                                      10⤵
                                      • Executes a command shell one-liner
                                      PID:5760
                                      • C:\Windows\system32\chcp.com
                                        chcp 65001
                                        11⤵
                                          PID:4896
                                        • C:\Windows\system32\PING.EXE
                                          ping -n 10 localhost
                                          11⤵
                                          • System Network Configuration Discovery: Internet Connection Discovery
                                          • Runs ping.exe
                                          PID:4148
                                        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                          11⤵
                                            PID:2828
                                            • 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
                                              12⤵
                                              • Scheduled Task/Job: Scheduled Task
                                              PID:5304
                                            • C:\Windows\system32\cmd.exe
                                              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\2UtZZiXwcCDy.bat" "
                                              12⤵
                                              • Executes a command shell one-liner
                                              PID:5128
                                              • C:\Windows\system32\chcp.com
                                                chcp 65001
                                                13⤵
                                                  PID:4116
                                                • C:\Windows\system32\PING.EXE
                                                  ping -n 10 localhost
                                                  13⤵
                                                  • System Network Configuration Discovery: Internet Connection Discovery
                                                  • Runs ping.exe
                                                  PID:5356
                                                • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                  13⤵
                                                    PID:2080
                                                    • 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
                                                      14⤵
                                                      • Scheduled Task/Job: Scheduled Task
                                                      PID:5440
                                                    • C:\Windows\system32\cmd.exe
                                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\HDGueDk9bw7V.bat" "
                                                      14⤵
                                                      • Executes a command shell one-liner
                                                      PID:1844
                                                      • C:\Windows\system32\chcp.com
                                                        chcp 65001
                                                        15⤵
                                                          PID:5104
                                                        • C:\Windows\system32\PING.EXE
                                                          ping -n 10 localhost
                                                          15⤵
                                                          • System Network Configuration Discovery: Internet Connection Discovery
                                                          • Runs ping.exe
                                                          PID:5972
                                                        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                          15⤵
                                                            PID:260
                                                            • 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
                                                              16⤵
                                                              • Scheduled Task/Job: Scheduled Task
                                                              PID:2572
                                                            • C:\Windows\system32\cmd.exe
                                                              C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\uQ1T0Q1Inwhz.bat" "
                                                              16⤵
                                                              • Executes a command shell one-liner
                                                              PID:3280
                                                              • C:\Windows\system32\chcp.com
                                                                chcp 65001
                                                                17⤵
                                                                  PID:5000
                                                                • C:\Windows\system32\PING.EXE
                                                                  ping -n 10 localhost
                                                                  17⤵
                                                                  • System Network Configuration Discovery: Internet Connection Discovery
                                                                  • Runs ping.exe
                                                                  PID:1972
                                                                • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                                  "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                                  17⤵
                                                                    PID:1516
                                                                    • 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
                                                                      18⤵
                                                                      • Scheduled Task/Job: Scheduled Task
                                                                      PID:1340
                                                                    • C:\Windows\system32\cmd.exe
                                                                      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\4Z3nus2qfKjF.bat" "
                                                                      18⤵
                                                                      • Executes a command shell one-liner
                                                                      PID:3260
                                                                      • C:\Windows\system32\chcp.com
                                                                        chcp 65001
                                                                        19⤵
                                                                          PID:1744
                                                                        • C:\Windows\system32\PING.EXE
                                                                          ping -n 10 localhost
                                                                          19⤵
                                                                          • System Network Configuration Discovery: Internet Connection Discovery
                                                                          • Runs ping.exe
                                                                          PID:4332
                                                                        • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                                                          "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
                                                                          19⤵
                                                                            PID:1760
                                                                            • 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
                                                                              20⤵
                                                                              • Scheduled Task/Job: Scheduled Task
                                                                              PID:1700

                                      Network

                                            MITRE ATT&CK Enterprise v16

                                            Replay Monitor

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                                            Downloads

                                            2UtZZiXwcCDy.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\2UtZZiXwcCDy.bat
                                            • Size 207B
                                            • SHA256 50c7ed6fa86af8edb8ca2eee3875824dc7c80211ed2f82108e3964271e120c0b
                                            • MD5 SHA1 SHA512 TLSH

                                            4Z3nus2qfKjF.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\4Z3nus2qfKjF.bat
                                            • Size 207B
                                            • SHA256 214b4043313d784d1f520ecba3f5d5453a938425208217e9c031ea3d299cdbe5
                                            • MD5 SHA1 SHA512 TLSH

                                            AL7kXUSF1Pni.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\AL7kXUSF1Pni.bat
                                            • Size 207B
                                            • SHA256 95c1bf747131e2f9b6fc00f07fd1bf0bb86a129762a81211b774606a33edc518
                                            • MD5 SHA1 SHA512 TLSH

                                            HDGueDk9bw7V.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\HDGueDk9bw7V.bat
                                            • Size 207B
                                            • SHA256 cffaceab4326e8ada06b957ed16279767f68f7bc12d872fcc432bb1b1280e2a3
                                            • MD5 SHA1 SHA512 TLSH

                                            MUQmDkkjSwqd.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\MUQmDkkjSwqd.bat
                                            • Size 207B
                                            • SHA256 d8eee65e6ba7e661cf7ae02ebd6656a0bda1e0b3260d77b3922ad5e29613457a
                                            • MD5 SHA1 SHA512 TLSH

                                            dmXU24JzXjoY.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\dmXU24JzXjoY.bat
                                            • Size 207B
                                            • SHA256 0ef4115b9e8f18f5c3808f37196cde35aebf614a91c6b0aa206683ea3993ecd2
                                            • MD5 SHA1 SHA512 TLSH

                                            pR4RQZNOEFHt.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\pR4RQZNOEFHt.bat
                                            • Size 207B
                                            • SHA256 0883b108c882bc1cc25480c0d0a95bec96d9be4130d9dea9a819f988a33a9b8d
                                            • MD5 SHA1 SHA512 TLSH

                                            tnvHn5a0Y531.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\tnvHn5a0Y531.bat
                                            • Size 207B
                                            • SHA256 fad14781507d7457e2639fc5f709ab80ce44fb2c1ded96c71b3b672d6e73ddb4
                                            • MD5 SHA1 SHA512 TLSH

                                            uQ1T0Q1Inwhz.bat

                                            • Path C:\Users\Admin\AppData\Local\Temp\uQ1T0Q1Inwhz.bat
                                            • Size 207B
                                            • SHA256 b24138669c85ca3062b763a1123c84cd7c5d723941901385862cd99a2227eb0d
                                            • MD5 SHA1 SHA512 TLSH

                                            Client.exe

                                            • Path C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
                                            • Size 3.1MB
                                            • SHA256 d726a1148580f673427f68a823e6c08c319d7d0f389b4dad599cb38d8564628b
                                            • MD5 SHA1 SHA512 SSDEEP TLSH

                                            memory/4200-33-0x000000001D9E0000-0x000000001DA92000-memory.dmp

                                            memory/4200-32-0x000000001D8D0000-0x000000001D920000-memory.dmp

                                            memory/4948-30-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-27-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-34-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-29-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-16-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-28-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-19-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-17-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-20-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-21-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-22-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-24-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-23-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-25-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4948-26-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-8-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-7-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-12-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-0-0x00007FFB2F65F000-0x00007FFB2F660000-memory.dmp

                                            memory/4964-11-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-10-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-18-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-14-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-13-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-9-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-6-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-5-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-4-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-3-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-2-0x00007FFB2F4D0000-0x00007FFB2FE74000-memory.dmp

                                            memory/4964-1-0x00000000008B0000-0x0000000000BD4000-memory.dmp