Analysis

  • max time kernel
    104s
  • max time network
    114s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    31-12-2024 02:14

General

  • Target

    d015e99afd1bb21e6ba6abf2a2a053ea1b4822904ac3a84791459f1b6d74af2d.exe

  • Size

    34KB

  • MD5

    4677d0618c8a4573df5013b28c71db32

  • SHA1

    411c8767255d0b1b04c6f1188efb5e8c08e233a7

  • SHA256

    d015e99afd1bb21e6ba6abf2a2a053ea1b4822904ac3a84791459f1b6d74af2d

  • SHA512

    4590e44321804914e5ab393897ed0d442120116ffc0c21db6c3f4bde0b2ec85f580eb0142e576f094dc380e6cbb42b1c0961a83b20943e5dbee6b6f4174c12c9

  • SSDEEP

    768:YaW5wDyJUqGXW5ezbAUnc8DYNRWT8uj+IqxAkHGe2ay:YaWGyiqGX6edc8DYDWTXNBeZy

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Runtime Broker

C2

92.221.125.55:49868

Mutex

73f0bf3a-83f3-424b-b7a1-a8200df3e317

Attributes
  • encryption_key

    5CB2755608EFDB1313EF4F2ACEA101833F5AEE2B

  • install_name

    Runtime Broker.exe

  • log_directory

    Logs

  • reconnect_delay

    100

  • startup_key

    System

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 9 IoCs
  • Drops file in System32 directory 11 IoCs
  • UPX packed file 2 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

  • Enumerates physical storage devices 1 TTPs

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

  • Modifies registry key 1 TTPs 3 IoCs
  • Modifies system certificate store 2 TTPs 2 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 5 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 IoCs
  • Uses Task Scheduler COM API 1 TTPs

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

Processes

  • C:\Users\Admin\AppData\Local\Temp\d015e99afd1bb21e6ba6abf2a2a053ea1b4822904ac3a84791459f1b6d74af2d.exe
    "C:\Users\Admin\AppData\Local\Temp\d015e99afd1bb21e6ba6abf2a2a053ea1b4822904ac3a84791459f1b6d74af2d.exe"
    1⤵
    • Loads dropped DLL
    • Drops file in System32 directory
    • Modifies system certificate store
    • Suspicious use of WriteProcessMemory
    PID:2748
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\PushNotifications /v ToastEnabled /t REG_DWORD /d 0 /f >nul 2>&1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2732
      • C:\Windows\system32\reg.exe
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\PushNotifications /v ToastEnabled /t REG_DWORD /d 0 /f
        3⤵
        • Modifies registry key
        PID:2652
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Notifications\Settings /v NOC_GLOBAL_SETTING_ALLOW_TOASTS_ABOVE_LOCK /t REG_DWORD /d 0 /f >nul 2>&1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2704
      • C:\Windows\system32\reg.exe
        reg add HKCU\Software\Microsoft\Windows\CurrentVersion\Notifications\Settings /v NOC_GLOBAL_SETTING_ALLOW_TOASTS_ABOVE_LOCK /t REG_DWORD /d 0 /f
        3⤵
        • Modifies registry key
        PID:2640
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c reg add HKCU\Software\Policies\Microsoft\Windows\Explorer /v DisableNotificationCenter /t REG_DWORD /d 1 /f >nul 2>&1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2284
      • C:\Windows\system32\reg.exe
        reg add HKCU\Software\Policies\Microsoft\Windows\Explorer /v DisableNotificationCenter /t REG_DWORD /d 1 /f
        3⤵
        • Modifies registry key
        PID:2516
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c schtasks /query /tn "SystemHealthMonitor64" >nul 2>&1
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:2900
      • C:\Windows\system32\schtasks.exe
        schtasks /query /tn "SystemHealthMonitor64"
        3⤵
          PID:2632
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c schtasks /create /f /tn "SystemHealthMonitor64" /tr "C:\windows\system32\SystemHealthMonitor64.exe" /sc onlogon /rl highest >nul 2>&1
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:2660
        • C:\Windows\system32\schtasks.exe
          schtasks /create /f /tn "SystemHealthMonitor64" /tr "C:\windows\system32\SystemHealthMonitor64.exe" /sc onlogon /rl highest
          3⤵
          • Scheduled Task/Job: Scheduled Task
          PID:3044
      • C:\Windows\system32\cmd.exe
        C:\Windows\system32\cmd.exe /c schtasks /query /tn "Updateservices64" >nul 2>&1
        2⤵
        • Suspicious use of WriteProcessMemory
        PID:1736
        • C:\Windows\system32\schtasks.exe
          schtasks /query /tn "Updateservices64"
          3⤵
            PID:2108
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c schtasks /create /f /tn "Updateservices64" /tr "C:\windows\system32\Updateservices64.exe" /sc onlogon /rl highest >nul 2>&1
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:2460
          • C:\Windows\system32\schtasks.exe
            schtasks /create /f /tn "Updateservices64" /tr "C:\windows\system32\Updateservices64.exe" /sc onlogon /rl highest
            3⤵
            • Scheduled Task/Job: Scheduled Task
            PID:1824
        • C:\windows\system32\Updateservices64.exe
          "C:\windows\system32\Updateservices64.exe"
          2⤵
          • Executes dropped EXE
          • Suspicious use of WriteProcessMemory
          PID:1256
          • C:\windows\system32\Updateservices64.exe
            "C:\windows\system32\Updateservices64.exe"
            3⤵
            • Executes dropped EXE
            • Loads dropped DLL
            PID:1484
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c schtasks /query /tn "Systemservices64" >nul 2>&1
          2⤵
          • Suspicious use of WriteProcessMemory
          PID:1980
          • C:\Windows\system32\schtasks.exe
            schtasks /query /tn "Systemservices64"
            3⤵
              PID:1968
          • C:\Windows\system32\cmd.exe
            C:\Windows\system32\cmd.exe /c schtasks /create /f /tn "Systemservices64" /tr "C:\windows\system32\Systemservices64.exe" /sc onlogon /rl highest >nul 2>&1
            2⤵
            • Suspicious use of WriteProcessMemory
            PID:2380
            • C:\Windows\system32\schtasks.exe
              schtasks /create /f /tn "Systemservices64" /tr "C:\windows\system32\Systemservices64.exe" /sc onlogon /rl highest
              3⤵
              • Scheduled Task/Job: Scheduled Task
              PID:1308
          • C:\windows\system32\Systemservices64.exe
            "C:\windows\system32\Systemservices64.exe"
            2⤵
            • Executes dropped EXE
            • Drops file in System32 directory
            • Suspicious use of AdjustPrivilegeToken
            • Suspicious use of WriteProcessMemory
            PID:448
            • C:\windows\system32\schtasks.exe
              "schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Runtime Broker.exe" /rl HIGHEST /f
              3⤵
              • Scheduled Task/Job: Scheduled Task
              PID:2028
            • C:\Windows\system32\SubDir\Runtime Broker.exe
              "C:\Windows\system32\SubDir\Runtime Broker.exe"
              3⤵
              • Executes dropped EXE
              • Drops file in System32 directory
              • Suspicious use of AdjustPrivilegeToken
              • Suspicious use of FindShellTrayWindow
              • Suspicious use of SendNotifyMessage
              • Suspicious use of SetWindowsHookEx
              PID:1396
              • C:\Windows\system32\schtasks.exe
                "schtasks" /create /tn "System" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Runtime Broker.exe" /rl HIGHEST /f
                4⤵
                • Scheduled Task/Job: Scheduled Task
                PID:1720

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Users\Admin\AppData\Local\Temp\_MEI12562\python313.dll

          Filesize

          1.8MB

          MD5

          1490ed147cdd2c2fb09259d2b6c42161

          SHA1

          11c639b79b11d6c6d2a5910e602b199e8c63fffe

          SHA256

          c47c6432c0c202e885b344a18dcb4e392999c9a78eb987720b48e0fcff2e6a61

          SHA512

          1f086ab3e2029ad450a9be92d3e367342b6eed52e7581647e7b88596a1cbee1d9b478c41ce956396e4056974f1f3fe148192828bad3613ab58ed2c3e758b8a03

        • C:\Users\Admin\AppData\Local\Temp\_MEI12562\setuptools\_vendor\wheel-0.43.0.dist-info\INSTALLER

          Filesize

          4B

          MD5

          365c9bfeb7d89244f2ce01c1de44cb85

          SHA1

          d7a03141d5d6b1e88b6b59ef08b6681df212c599

          SHA256

          ceebae7b8927a3227e5303cf5e0f1f7b34bb542ad7250ac03fbcde36ec2f1508

          SHA512

          d220d322a4053d84130567d626a9f7bb2fb8f0b854da1621f001826dc61b0ed6d3f91793627e6f0ac2ac27aea2b986b6a7a63427f05fe004d8a2adfbdadc13c1

        • C:\Users\Admin\AppData\Local\Temp\_MEI12562\ucrtbase.dll

          Filesize

          992KB

          MD5

          0e0bac3d1dcc1833eae4e3e4cf83c4ef

          SHA1

          4189f4459c54e69c6d3155a82524bda7549a75a6

          SHA256

          8a91052ef261b5fbf3223ae9ce789af73dfe1e9b0ba5bdbc4d564870a24f2bae

          SHA512

          a45946e3971816f66dd7ea3788aacc384a9e95011500b458212dc104741315b85659e0d56a41570731d338bdf182141c093d3ced222c007038583ceb808e26fd

        • C:\windows\system32\Systemservices64.exe

          Filesize

          3.1MB

          MD5

          52025b6114feff994df431c8a0a5c9ae

          SHA1

          4b0e9178616c83f68f45775eaacace6027dd42c2

          SHA256

          8c5c09639035ecd95ba08dd6aae713443b3f45614e1fde653b2d6f45156b4e7b

          SHA512

          03ee1109f2d0e79620f7f9fee61411762842cc77ccbc1bc25e98c97278e4ee7745d5e3d46d165761ba5134e228e45c270b1d05cdbda6fef51a3409b8e9cdb73f

        • \Users\Admin\AppData\Local\Temp\_MEI12562\api-ms-win-core-file-l1-2-0.dll

          Filesize

          21KB

          MD5

          1c58526d681efe507deb8f1935c75487

          SHA1

          0e6d328faf3563f2aae029bc5f2272fb7a742672

          SHA256

          ef13dce8f71173315dfc64ab839b033ab19a968ee15230e9d4d2c9d558efeee2

          SHA512

          8edb9a0022f417648e2ece9e22c96e2727976332025c3e7d8f15bcf6d7d97e680d1bf008eb28e2e0bd57787dcbb71d38b2deb995b8edc35fa6852ab1d593f3d1

        • \Users\Admin\AppData\Local\Temp\_MEI12562\api-ms-win-core-file-l2-1-0.dll

          Filesize

          18KB

          MD5

          bfffa7117fd9b1622c66d949bac3f1d7

          SHA1

          402b7b8f8dcfd321b1d12fc85a1ee5137a5569b2

          SHA256

          1ea267a2e6284f17dd548c6f2285e19f7edb15d6e737a55391140ce5cb95225e

          SHA512

          b319cc7b436b1be165cdf6ffcab8a87fe29de78f7e0b14c8f562be160481fb5483289bd5956fdc1d8660da7a3f86d8eede35c6cc2b7c3d4c852decf4b2dcdb7f

        • \Users\Admin\AppData\Local\Temp\_MEI12562\api-ms-win-core-localization-l1-2-0.dll

          Filesize

          21KB

          MD5

          724223109e49cb01d61d63a8be926b8f

          SHA1

          072a4d01e01dbbab7281d9bd3add76f9a3c8b23b

          SHA256

          4e975f618df01a492ae433dff0dd713774d47568e44c377ceef9e5b34aad1210

          SHA512

          19b0065b894dc66c30a602c9464f118e7f84d83010e74457d48e93aaca4422812b093b15247b24d5c398b42ef0319108700543d13f156067b169ccfb4d7b6b7c

        • \Users\Admin\AppData\Local\Temp\_MEI12562\api-ms-win-core-processthreads-l1-1-1.dll

          Filesize

          21KB

          MD5

          517eb9e2cb671ae49f99173d7f7ce43f

          SHA1

          4ccf38fed56166ddbf0b7efb4f5314c1f7d3b7ab

          SHA256

          57cc66bf0909c430364d35d92b64eb8b6a15dc201765403725fe323f39e8ac54

          SHA512

          492be2445b10f6bfe6c561c1fc6f5d1af6d1365b7449bc57a8f073b44ae49c88e66841f5c258b041547fcd33cbdcb4eb9dd3e24f0924db32720e51651e9286be

        • \Users\Admin\AppData\Local\Temp\_MEI12562\api-ms-win-core-timezone-l1-1-0.dll

          Filesize

          21KB

          MD5

          d12403ee11359259ba2b0706e5e5111c

          SHA1

          03cc7827a30fd1dee38665c0cc993b4b533ac138

          SHA256

          f60e1751a6ac41f08e46480bf8e6521b41e2e427803996b32bdc5e78e9560781

          SHA512

          9004f4e59835af57f02e8d9625814db56f0e4a98467041da6f1367ef32366ad96e0338d48fff7cc65839a24148e2d9989883bcddc329d9f4d27cae3f843117d0

        • memory/448-838-0x00000000000B0000-0x00000000003D4000-memory.dmp

          Filesize

          3.1MB

        • memory/1396-844-0x0000000000D80000-0x00000000010A4000-memory.dmp

          Filesize

          3.1MB

        • memory/1484-837-0x000007FEF54B0000-0x000007FEF5B15000-memory.dmp

          Filesize

          6.4MB