Analysis

  • max time kernel
    135s
  • max time network
    140s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    21-04-2024 00:25

General

  • Target

    schvine.exe

  • Size

    3.1MB

  • MD5

    77c7750e215b1a45430ebeecc5973d14

  • SHA1

    5bdcb97d5b0f6520d03f76fd6879c092da44b2fe

  • SHA256

    9aa555e008f1af5330fc5362a4f024115185c896a8409d55559442b5d2a439af

  • SHA512

    954bb9f6a52bd5ff4924fdeae991440e7b6ad51aba000be8fe1100ed44616fba87bb9ba3feda0376e82e68990fcc21063f3a7c5a29e0d3c17bf1676c1cc3ff1e

  • SSDEEP

    49152:Dvkt62XlaSFNWPjljiFa2RoUYIBVuh9LoGdRdTHHB72eh2NT:Dv462XlaSFNWPjljiFXRoUYIBVuh1

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

SLAVE

C2

uk2.localto.net:38035

Mutex

cc0a2b76-665e-4e16-b318-5ee02270fbcd

Attributes
  • encryption_key

    D7F09F1F0B9CECC640BA0B3D8975FBE5CED725B5

  • install_name

    UpdateHost.exe

  • log_directory

    Error Logs

  • reconnect_delay

    3000

  • startup_key

    WOS64

  • subdirectory

    Windows

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 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.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 14 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\schvine.exe
    "C:\Users\Admin\AppData\Local\Temp\schvine.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3692
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "WOS64" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\UpdateHost.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:4356
    • C:\Users\Admin\AppData\Roaming\Windows\UpdateHost.exe
      "C:\Users\Admin\AppData\Roaming\Windows\UpdateHost.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4916
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "WOS64" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\UpdateHost.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:4696
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /delete /tn "WOS64" /f
        3⤵
          PID:2992
        • C:\Windows\system32\cmd.exe
          C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\ZLyzMrWjUif9.bat" "
          3⤵
          • Suspicious use of WriteProcessMemory
          PID:520
          • C:\Windows\system32\chcp.com
            chcp 65001
            4⤵
              PID:2932
            • C:\Windows\system32\PING.EXE
              ping -n 10 localhost
              4⤵
              • Runs ping.exe
              PID:1868

      Network

      MITRE ATT&CK Matrix ATT&CK v13

      Execution

      Scheduled Task/Job

      1
      T1053

      Persistence

      Scheduled Task/Job

      1
      T1053

      Privilege Escalation

      Scheduled Task/Job

      1
      T1053

      Discovery

      System Information Discovery

      1
      T1082

      Remote System Discovery

      1
      T1018

      Query Registry

      1
      T1012

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\ZLyzMrWjUif9.bat
        Filesize

        216B

        MD5

        173696b3f94ef587b2f64986ebcec601

        SHA1

        2b40616b1dd8927989e730bbfc03ee8ff0cf609c

        SHA256

        574d7eb43d9d85f9ae765206eeb9f50157090bd8c130c036c537f88603a5aa1b

        SHA512

        49c078ae4c5fb6329118b6c6f06b55498c611c6c3651491af0284a3e5b09e761a48eae25c16d6f5ba2f2a94e6739c6cdd17085c6fa236d4890809160f871b7a9

      • C:\Users\Admin\AppData\Roaming\Windows\UpdateHost.exe
        Filesize

        3.1MB

        MD5

        77c7750e215b1a45430ebeecc5973d14

        SHA1

        5bdcb97d5b0f6520d03f76fd6879c092da44b2fe

        SHA256

        9aa555e008f1af5330fc5362a4f024115185c896a8409d55559442b5d2a439af

        SHA512

        954bb9f6a52bd5ff4924fdeae991440e7b6ad51aba000be8fe1100ed44616fba87bb9ba3feda0376e82e68990fcc21063f3a7c5a29e0d3c17bf1676c1cc3ff1e

      • memory/3692-0-0x0000000000640000-0x0000000000964000-memory.dmp
        Filesize

        3.1MB

      • memory/3692-1-0x00007FFC94BD0000-0x00007FFC955BC000-memory.dmp
        Filesize

        9.9MB

      • memory/3692-2-0x000000001B5B0000-0x000000001B5C0000-memory.dmp
        Filesize

        64KB

      • memory/3692-9-0x00007FFC94BD0000-0x00007FFC955BC000-memory.dmp
        Filesize

        9.9MB

      • memory/4916-11-0x000000001BEB0000-0x000000001BEC0000-memory.dmp
        Filesize

        64KB

      • memory/4916-12-0x000000001BC90000-0x000000001BCE0000-memory.dmp
        Filesize

        320KB

      • memory/4916-13-0x000000001C640000-0x000000001C6F2000-memory.dmp
        Filesize

        712KB

      • memory/4916-16-0x000000001BE20000-0x000000001BE32000-memory.dmp
        Filesize

        72KB

      • memory/4916-17-0x000000001C580000-0x000000001C5BE000-memory.dmp
        Filesize

        248KB

      • memory/4916-18-0x00007FFC94BD0000-0x00007FFC955BC000-memory.dmp
        Filesize

        9.9MB

      • memory/4916-19-0x000000001BEB0000-0x000000001BEC0000-memory.dmp
        Filesize

        64KB

      • memory/4916-24-0x00007FFC94BD0000-0x00007FFC955BC000-memory.dmp
        Filesize

        9.9MB

      • memory/4916-10-0x00007FFC94BD0000-0x00007FFC955BC000-memory.dmp
        Filesize

        9.9MB