Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    27/03/2024, 09:05

General

  • Target
    MayAimV1.4.exe
  • Size 44.5MB
  • Sample240327-k2ezysca61
  • SHA256 db89b609346052df32a846ab8b74266f648edd2eb8562b1d492ef5fa388c8346
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • quasar

Version
  • 1.4.1

Botnet
  • Office04

C2
  • 6.tcp.ngrok.io:19762

Mutex
  • 71924265-9217-49f5-a55f-6faca9fa2822

Attributes
  • encryption_key

    BD0AC76C5AA669036986ACDAD97B0DB7FC6CD018

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    svchost

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 5 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Legitimate hosting services abused for malware hosting/C2 1 TTPs 3 IoCs
  • Detects Pyinstaller 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 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 16 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\MayAimV1.4.exe
    "C:\Users\Admin\AppData\Local\Temp\MayAimV1.4.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of WriteProcessMemory
    PID:1956
    • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\svchost.exe
      C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\svchost.exe
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4196
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:5016
      • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
        "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:2024
        • C:\Windows\SYSTEM32\schtasks.exe
          "schtasks" /create /tn "svchost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
          4⤵
          • Creates scheduled task(s)
          PID:2348
    • C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\mayaim.EXE
      C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\mayaim.EXE
      2⤵
      • Executes dropped EXE
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:4192
      • C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\Cheat.exe
        C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\Cheat.exe
        3⤵
        • Executes dropped EXE
        • Suspicious use of WriteProcessMemory
        PID:4748
        • C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\Cheat.exe
          C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\Cheat.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:2364

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        mayaim.EXE

        • Path C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\mayaim.EXE
        • Size 5.0MB
        • SHA256 04fcc6a67503a091ce173cfc1db09baca72913736624a373e1edc2701f026809
        • MD5 SHA1 SHA512 SSDEEP

        svchost.exe

        • Path C:\Users\Admin\AppData\Local\Temp\IXP000.TMP\svchost.exe
        • Size 3.1MB
        • SHA256 bb10237bf99f3d20c1afac58f0ae18ce8e52516cf7624c71582d590d1dc7e1f8
        • MD5 SHA1 SHA512 SSDEEP

        Cheat.exe

        • Path C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\Cheat.exe
        • Size 3.8MB
        • SHA256 73a2fe520caad535bd7c2fb9041f04835602a614eae47842e29f33c3418d5def
        • MD5 SHA1 SHA512 SSDEEP

        Cheat.exe

        • Path C:\Users\Admin\AppData\Local\Temp\IXP001.TMP\Cheat.exe
        • Size 8.0MB
        • SHA256 008dc90ac87b8733886c2a312a3521b9e863005fd24db53cce79aff021050619
        • MD5 SHA1 SHA512 SSDEEP

        VCRUNTIME140.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\VCRUNTIME140.dll
        • Size 78KB
        • SHA256 8598940e498271b542f2c04998626aa680f2172d0ff4f8dbd4ffec1a196540f9
        • MD5 SHA1 SHA512 SSDEEP

        _bz2.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\_bz2.pyd
        • Size 77KB
        • SHA256 8633e8ad7172b095ed7ba40fa1039a64b04b20e6f42ac428e103d0c793831bda
        • MD5 SHA1 SHA512 SSDEEP

        _decimal.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\_decimal.pyd
        • Size 193KB
        • SHA256 1f6db9be716626f6803cefd646fbbc478878c6acce597d9f6c5776dc7b69d3c7
        • MD5 SHA1 SHA512 SSDEEP

        _hashlib.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\_hashlib.pyd
        • Size 46KB
        • SHA256 53180306bad339e76cc427009db15f124f49d4c879676258264365a7e2ed703f
        • MD5 SHA1 SHA512 SSDEEP

        _lzma.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\_lzma.pyd
        • Size 144KB
        • SHA256 caad390c4c3c6b1e50a33754a0af7d2c3f4b1245c8ead79ff7f7be0e5654e210
        • MD5 SHA1 SHA512 SSDEEP

        _socket.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\_socket.pyd
        • Size 65KB
        • SHA256 ec5817b46539f9a5cbf1525cf7c714bc0e9f5a918fc4b963dec9c301b86c7d1f
        • MD5 SHA1 SHA512 SSDEEP

        _tkinter.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\_tkinter.pyd
        • Size 51KB
        • SHA256 eceb324020654062f58a9b7947b98ffb57c7b75d2899840c34845e4cd5ef520f
        • MD5 SHA1 SHA512 SSDEEP

        base_library.zip

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\base_library.zip
        • Size 1.4MB
        • SHA256 db389a9e14bfac6ee5cce17d41f9637d3ff8b702cc74102db8643e78659670a0
        • MD5 SHA1 SHA512 SSDEEP

        libcrypto-1_1.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\libcrypto-1_1.dll
        • Size 2.2MB
        • SHA256 239d518dd67d8c2bbf6aeaded86ed464865e914db6bf3b115973d525ebd7d367
        • MD5 SHA1 SHA512 SSDEEP

        python311.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\python311.dll
        • Size 4.7MB
        • SHA256 9cf39945840ee8d769e47ffdb554044550b5843b29c68fa3849ba9376c3a7ec8
        • MD5 SHA1 SHA512 SSDEEP

        select.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\select.pyd
        • Size 25KB
        • SHA256 93b2b54c80d03ff7ade5fe4cd03baed8c5b5a8e1edcd695a53bae2e369006265
        • MD5 SHA1 SHA512 SSDEEP

        tcl86t.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl86t.dll
        • Size 1.4MB
        • SHA256 7ed409592314926d14c5d1663fce0701d1b0a2bc6d0360bfbe4014efd230f7df
        • MD5 SHA1 SHA512 SSDEEP

        msgcat-1.6.1.tm

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl8\8.5\msgcat-1.6.1.tm
        • Size 34KB
        • SHA256 6774519f179872ec5292523f2788b77b2b839e15665037e097a0d4edddd1c6fb
        • MD5 SHA1 SHA512 SSDEEP

        auto.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl\auto.tcl
        • Size 21KB
        • SHA256 517204ee436d08efc287abc97433c3bffcaf42ec6592a3009b9fd3b985ad772c
        • MD5 SHA1 SHA512 SSDEEP

        cp1252.enc

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl\encoding\cp1252.enc
        • Size 1KB
        • SHA256 741859cf238c3a63bbb20ec6ed51e46451372bb221cfff438297d261d0561c2e
        • MD5 SHA1 SHA512

        pkgIndex.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl\http1.0\pkgIndex.tcl
        • Size 746B
        • SHA256 77265723959c092897c2449c5b7768ca72d0efcd8c505bddbb7a84f6aa401339
        • MD5 SHA1 SHA512

        init.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl\init.tcl
        • Size 25KB
        • SHA256 331bcf0f9f635bd57c3384f2237260d074708b0975c700cfcbdb285f5f59ab1f
        • MD5 SHA1 SHA512 SSDEEP

        pkgIndex.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl\opt0.4\pkgIndex.tcl
        • Size 620B
        • SHA256 6a4abd2c519a745325c26fb23be7bbf95252d653a24806eb37fd4aa6a6479afe
        • MD5 SHA1 SHA512

        package.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl\package.tcl
        • Size 23KB
        • SHA256 f46ab61cdebe3aa45fa7e61a48930d64a0d0e7e94d04d6bf244f48c36cafe948
        • MD5 SHA1 SHA512 SSDEEP

        tclIndex

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl\tclIndex
        • Size 5KB
        • SHA256 ddf7e42def37888ad0a564aa4f8ca95f4eec942cebebfca851d35515104d5c89
        • MD5 SHA1 SHA512 SSDEEP

        tm.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tcl\tm.tcl
        • Size 11KB
        • SHA256 4b7ed9fd2363d6876092db3f720cbddf97e72b86b519403539ba96e1c815ed8f
        • MD5 SHA1 SHA512 SSDEEP

        tk86t.dll

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk86t.dll
        • Size 1.2MB
        • SHA256 f37b85b38f04303a1394c95dd2e67f08efbde1bafd9bfc3b2403e171bf5f979b
        • MD5 SHA1 SHA512 SSDEEP

        button.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\button.tcl
        • Size 21KB
        • SHA256 1f5dd8d81b26f16e772e92fd2a22accb785004d0ed3447e54f87005d9c6a07a5
        • MD5 SHA1 SHA512 SSDEEP

        entry.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\entry.tcl
        • Size 17KB
        • SHA256 af1de90270693273b52fc735da6b5cd5ca794f5afd4cf03ffd95147161098048
        • MD5 SHA1 SHA512 SSDEEP

        icons.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\icons.tcl
        • Size 10KB
        • SHA256 1264940e62b9a37967925418e9d0dc0befd369e8c181b9bab3d1607e3cc14b85
        • MD5 SHA1 SHA512 SSDEEP

        listbox.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\listbox.tcl
        • Size 14KB
        • SHA256 47c75f9f8348bf8f2c086c57b97b73741218100ca38d10b8abdf2051c95b9801
        • MD5 SHA1 SHA512 SSDEEP

        menu.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\menu.tcl
        • Size 38KB
        • SHA256 d1283f67e435aab0bdbe9fdaa540a162043f8d652c02fe79f3843a451f123d89
        • MD5 SHA1 SHA512 SSDEEP

        panedwindow.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\panedwindow.tcl
        • Size 5KB
        • SHA256 aa4f87e41ac8297f51150f2a9f787607690d01793456b93f0939c54d394731f9
        • MD5 SHA1 SHA512 SSDEEP

        pkgIndex.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\pkgIndex.tcl
        • Size 376B
        • SHA256 3f2539e85e2a9017913e61fe2600b499315e1a6f249a4ff90e0b530a1eeb8898
        • MD5 SHA1 SHA512

        scale.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\scale.tcl
        • Size 7KB
        • SHA256 0da2dc955ffd71062a21c3b747d9d59d66a5b09a907b9ed220be1b2342205a05
        • MD5 SHA1 SHA512 SSDEEP

        scrlbar.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\scrlbar.tcl
        • Size 12KB
        • SHA256 eec90404f702d3cfbfaec0f13bf5ed1ebeb736bee12d7e69770181a25401c61f
        • MD5 SHA1 SHA512 SSDEEP

        spinbox.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\spinbox.tcl
        • Size 16KB
        • SHA256 2ff791a44406dc8339c7da6116e6ec92289bee5fc1367d378f48094f4abea277
        • MD5 SHA1 SHA512 SSDEEP

        text.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\text.tcl
        • Size 34KB
        • SHA256 4a42ad370e0cd93d4133b49788c0b0e1c7cd78383e88bacb51cb751e8bfda15e
        • MD5 SHA1 SHA512 SSDEEP

        tk.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\tk.tcl
        • Size 23KB
        • SHA256 0f617d96cbf213296d7a5f7fcffbb4ae1149840d7d045211ef932e8dd66683e9
        • MD5 SHA1 SHA512 SSDEEP

        button.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\button.tcl
        • Size 2KB
        • SHA256 e38a9d1f437981aa6bf0bdd074d57b769a4140c0f7d9aff51743fe4ecc6dfddf
        • MD5 SHA1 SHA512

        combobox.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\combobox.tcl
        • Size 12KB
        • SHA256 68eed4af6d2ec5b3ea24b1122a704b040366cbe2f458103137479352ffa1475a
        • MD5 SHA1 SHA512 SSDEEP

        cursors.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\cursors.tcl
        • Size 4KB
        • SHA256 7a2ed9d78fabcafff16694f2f4a2e36ff5aa313f912d6e93484f3bcd0466ad91
        • MD5 SHA1 SHA512 SSDEEP

        entry.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\entry.tcl
        • Size 17KB
        • SHA256 830cc3009a735e92db70d53210c4928dd35caab5051ed14dec67e06ae25cbe28
        • MD5 SHA1 SHA512 SSDEEP

        fonts.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\fonts.tcl
        • Size 5KB
        • SHA256 b94c319e5a557a5665b1676d602b6495c0887c5bacf7fa5b776200112978bb7b
        • MD5 SHA1 SHA512 SSDEEP

        menubutton.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\menubutton.tcl
        • Size 6KB
        • SHA256 972b13854d0e9b84de338d6753f0f11f3a8534e7d0e51838796dae5a1e2e3085
        • MD5 SHA1 SHA512 SSDEEP

        notebook.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\notebook.tcl
        • Size 5KB
        • SHA256 22264d8d138e2c0e9a950305b4f08557c5a73f054f8215c0d8ce03854042be76
        • MD5 SHA1 SHA512 SSDEEP

        panedwindow.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\panedwindow.tcl
        • Size 2KB
        • SHA256 4d08a7e29eef731876951ef01dfa51654b6275fa3daadb1f48ff4bbeac238eb5
        • MD5 SHA1 SHA512

        progress.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\progress.tcl
        • Size 1KB
        • SHA256 697cc0a75ae31fe9c2d85fb25dca0afa5d0df9c523a2dfad2e4a36893be75fba
        • MD5 SHA1 SHA512

        scale.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\scale.tcl
        • Size 2KB
        • SHA256 b909add0b87fa8ee08fd731041907212a8a0939d37d2ff9b2f600cd67dabd4bb
        • MD5 SHA1 SHA512

        scrollbar.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\scrollbar.tcl
        • Size 3KB
        • SHA256 6eaa336b13815a7fc18bcd6b9adf722e794da2888d053c229044784c8c8e9de8
        • MD5 SHA1 SHA512

        sizegrip.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\sizegrip.tcl
        • Size 2KB
        • SHA256 e92d77b5cdca2206376db2129e87e3d744b3d5e31fde6c0bbd44a494a6845ce1
        • MD5 SHA1 SHA512

        spinbox.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\spinbox.tcl
        • Size 4KB
        • SHA256 df286bb59f471aa1e19df39af0ef7aa84df9f04dc4a439a747dd8ba43c300150
        • MD5 SHA1 SHA512 SSDEEP

        treeview.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\treeview.tcl
        • Size 9KB
        • SHA256 c88b60ffb0f72e095f6fc9786930add7f9ed049eabc713f889f9a7da516e188c
        • MD5 SHA1 SHA512 SSDEEP

        ttk.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\ttk.tcl
        • Size 4KB
        • SHA256 2c48343b1a47f472d1a6b9ee8d670ce7fb428db0db7244dc323ff4c7a8b4f64b
        • MD5 SHA1 SHA512 SSDEEP

        utils.tcl

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\tk\ttk\utils.tcl
        • Size 8KB
        • SHA256 d58610a34301bb6e61a60bec69a7cecf4c45c6a034a9fc123977174b586278be
        • MD5 SHA1 SHA512 SSDEEP

        unicodedata.pyd

        • Path C:\Users\Admin\AppData\Local\Temp\_MEI47482\unicodedata.pyd
        • Size 1.1MB
        • SHA256 1498105d00434a5ebbaa6bee2e5f5677c34a948b2073d789f4d4b5968a4c8aaf
        • MD5 SHA1 SHA512 SSDEEP

        memory/2024-275-0x000000001C9D0000-0x000000001CA20000-memory.dmp

        memory/2024-16-0x0000000003290000-0x00000000032A0000-memory.dmp

        memory/2024-390-0x000000001CAE0000-0x000000001CB92000-memory.dmp

        memory/2024-15-0x00007FFA2B6B0000-0x00007FFA2C171000-memory.dmp

        memory/2024-1021-0x00007FFA2B6B0000-0x00007FFA2C171000-memory.dmp

        memory/2024-1022-0x0000000003290000-0x00000000032A0000-memory.dmp

        memory/4196-14-0x00007FFA2B6B0000-0x00007FFA2C171000-memory.dmp

        memory/4196-8-0x00007FFA2B6B0000-0x00007FFA2C171000-memory.dmp

        memory/4196-7-0x0000000000E80000-0x00000000011A4000-memory.dmp