Analysis

  • max time kernel
    142s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231127-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-12-2023 10:41

General

  • Target

    425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe

  • Size

    3.2MB

  • MD5

    58abd80cc431895f2c2126f714ca3c8c

  • SHA1

    9338c3bbe9e6dd3658848c03a5d3bcf02dfbe965

  • SHA256

    425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff

  • SHA512

    fcd8197173da2c475451f500cbea32b446d872a8553ebd76dae4ac3873ed8da149e8036cad65968f10d6719992e442e0ddfb458ce250c41521668d5117a14ec4

  • SSDEEP

    49152:S9GUKQbhUbLP/WdzmmVoNyQNKXVTHUt0ONKgDGsbolFjeTXbjuOvtXcUwowyr4T5:yUbLPudCfUj0t0ON/GUW6lJ3HdjX0

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

y20.ddns.net:5552

Mutex

081f9344-bbf0-4c0d-832c-1597fc2c5291

Attributes
  • encryption_key

    51E85A39CEAF3ACB23D073483E360B1A632697B4

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of SendNotifyMessage 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe
    "C:\Users\Admin\AppData\Local\Temp\425e3e4f280f19e1de7ced375ab0b31dbd2ffe49ed2684ecb140918d662d58ff.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1376
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" Remove -ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '';New-ItemProperty -Path 'HKCU:\SOFTWARE\Microsoft\Windows\CurrentVersion\Run' -Name '' -Value '"C:\Users\Admin\AppData\Roaming\.exe"' -PropertyType 'String'
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4420
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      #cmd
      2⤵
        PID:2256
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
        #cmd
        2⤵
          PID:4816
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          #cmd
          2⤵
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          PID:4840

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

      • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_zzfym21e.ylx.ps1

        Filesize

        60B

        MD5

        d17fe0a3f47be24a6453e9ef58c94641

        SHA1

        6ab83620379fc69f80c0242105ddffd7d98d5d9d

        SHA256

        96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

        SHA512

        5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

      • memory/1376-12-0x0000000075210000-0x00000000759C0000-memory.dmp

        Filesize

        7.7MB

      • memory/1376-1-0x0000000075210000-0x00000000759C0000-memory.dmp

        Filesize

        7.7MB

      • memory/1376-2-0x0000000005890000-0x0000000005E34000-memory.dmp

        Filesize

        5.6MB

      • memory/1376-4-0x0000000005410000-0x0000000005420000-memory.dmp

        Filesize

        64KB

      • memory/1376-0-0x00000000006C0000-0x00000000009EE000-memory.dmp

        Filesize

        3.2MB

      • memory/4420-52-0x0000000007510000-0x000000000751A000-memory.dmp

        Filesize

        40KB

      • memory/4420-35-0x0000000004C50000-0x0000000004C60000-memory.dmp

        Filesize

        64KB

      • memory/4420-62-0x0000000075210000-0x00000000759C0000-memory.dmp

        Filesize

        7.7MB

      • memory/4420-7-0x0000000004C50000-0x0000000004C60000-memory.dmp

        Filesize

        64KB

      • memory/4420-59-0x0000000007820000-0x0000000007842000-memory.dmp

        Filesize

        136KB

      • memory/4420-8-0x0000000005290000-0x00000000058B8000-memory.dmp

        Filesize

        6.2MB

      • memory/4420-58-0x00000000077C0000-0x00000000077C8000-memory.dmp

        Filesize

        32KB

      • memory/4420-15-0x00000000058F0000-0x0000000005912000-memory.dmp

        Filesize

        136KB

      • memory/4420-57-0x00000000077E0000-0x00000000077FA000-memory.dmp

        Filesize

        104KB

      • memory/4420-23-0x0000000005B70000-0x0000000005BD6000-memory.dmp

        Filesize

        408KB

      • memory/4420-6-0x0000000075210000-0x00000000759C0000-memory.dmp

        Filesize

        7.7MB

      • memory/4420-56-0x00000000076E0000-0x00000000076F4000-memory.dmp

        Filesize

        80KB

      • memory/4420-16-0x0000000005A90000-0x0000000005AF6000-memory.dmp

        Filesize

        408KB

      • memory/4420-29-0x0000000005BE0000-0x0000000005F34000-memory.dmp

        Filesize

        3.3MB

      • memory/4420-30-0x0000000006190000-0x00000000061AE000-memory.dmp

        Filesize

        120KB

      • memory/4420-31-0x0000000004EB0000-0x0000000004EFC000-memory.dmp

        Filesize

        304KB

      • memory/4420-55-0x00000000076D0000-0x00000000076DE000-memory.dmp

        Filesize

        56KB

      • memory/4420-54-0x00000000076A0000-0x00000000076B1000-memory.dmp

        Filesize

        68KB

      • memory/4420-53-0x0000000007720000-0x00000000077B6000-memory.dmp

        Filesize

        600KB

      • memory/4420-9-0x0000000004C50000-0x0000000004C60000-memory.dmp

        Filesize

        64KB

      • memory/4420-36-0x000000007F870000-0x000000007F880000-memory.dmp

        Filesize

        64KB

      • memory/4420-37-0x0000000007150000-0x0000000007182000-memory.dmp

        Filesize

        200KB

      • memory/4420-38-0x0000000070BC0000-0x0000000070C0C000-memory.dmp

        Filesize

        304KB

      • memory/4420-48-0x0000000006740000-0x000000000675E000-memory.dmp

        Filesize

        120KB

      • memory/4420-49-0x0000000007390000-0x0000000007433000-memory.dmp

        Filesize

        652KB

      • memory/4420-50-0x0000000007AE0000-0x000000000815A000-memory.dmp

        Filesize

        6.5MB

      • memory/4420-51-0x00000000074A0000-0x00000000074BA000-memory.dmp

        Filesize

        104KB

      • memory/4420-5-0x0000000004BA0000-0x0000000004BD6000-memory.dmp

        Filesize

        216KB

      • memory/4840-34-0x00000000068E0000-0x0000000006992000-memory.dmp

        Filesize

        712KB

      • memory/4840-33-0x0000000006680000-0x00000000066D0000-memory.dmp

        Filesize

        320KB

      • memory/4840-32-0x0000000006AF0000-0x0000000007108000-memory.dmp

        Filesize

        6.1MB

      • memory/4840-24-0x00000000052E0000-0x00000000052EA000-memory.dmp

        Filesize

        40KB

      • memory/4840-22-0x0000000005320000-0x0000000005330000-memory.dmp

        Filesize

        64KB

      • memory/4840-14-0x0000000005330000-0x00000000053C2000-memory.dmp

        Filesize

        584KB

      • memory/4840-13-0x0000000075210000-0x00000000759C0000-memory.dmp

        Filesize

        7.7MB

      • memory/4840-10-0x0000000000400000-0x0000000000724000-memory.dmp

        Filesize

        3.1MB

      • memory/4840-63-0x0000000075210000-0x00000000759C0000-memory.dmp

        Filesize

        7.7MB

      • memory/4840-64-0x0000000005320000-0x0000000005330000-memory.dmp

        Filesize

        64KB