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Analysis

  • max time kernel
    146s
  • max time network
    124s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    14/01/2025, 01:53

General

  • Target

    Client-built.exe

  • Size

    3.1MB

  • MD5

    18833ce91b26be79378f897dca190f66

  • SHA1

    c7fdea28474a3e12ebe51aa878abeed9969d8d01

  • SHA256

    77c61d4dd21b5b2319e14d750799a1be96254cb0fd4c7edd3e81bc825c91594c

  • SHA512

    565b069175f60cce8d67eddfe41bc8ab5caadbe2ed41acd7a3108b96c3cf7fbdbc8593af7bbe1ad6ac33dd0444866073eff65ff001458b7e94c8ded9f41561c6

  • SSDEEP

    49152:SvaY52fyaSZOrPWluWBuGG5g5hnDmVmzmioGdKeTHHB72eh2NT:Svv52fyaSZOrPWluWBDG5g5hnDmC

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Offset

C2

127.0.0.1:8080

Mutex

6210ab1d-dd45-4f17-a324-f24c1474c4d8

Attributes
  • encryption_key

    CABE6FE0988CAB22AE614AA6065A89402DF1C513

  • install_name

    svchost.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    conhost

  • subdirectory

    Windows

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Scheduled Task/Job: Scheduled Task 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 9 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\Client-built.exe
    "C:\Users\Admin\AppData\Local\Temp\Client-built.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2060
    • C:\Windows\system32\schtasks.exe
      "schtasks" /create /tn "conhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2620
    • C:\Users\Admin\AppData\Roaming\Windows\svchost.exe
      "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1708
      • C:\Windows\system32\schtasks.exe
        "schtasks" /create /tn "conhost" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\Windows\svchost.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3040

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\Windows\svchost.exe

    Filesize

    3.1MB

    MD5

    18833ce91b26be79378f897dca190f66

    SHA1

    c7fdea28474a3e12ebe51aa878abeed9969d8d01

    SHA256

    77c61d4dd21b5b2319e14d750799a1be96254cb0fd4c7edd3e81bc825c91594c

    SHA512

    565b069175f60cce8d67eddfe41bc8ab5caadbe2ed41acd7a3108b96c3cf7fbdbc8593af7bbe1ad6ac33dd0444866073eff65ff001458b7e94c8ded9f41561c6

  • memory/1708-8-0x0000000000E10000-0x0000000001134000-memory.dmp

    Filesize

    3.1MB

  • memory/1708-10-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

    Filesize

    9.9MB

  • memory/1708-11-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

    Filesize

    9.9MB

  • memory/1708-12-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

    Filesize

    9.9MB

  • memory/2060-0-0x000007FEF5DD3000-0x000007FEF5DD4000-memory.dmp

    Filesize

    4KB

  • memory/2060-1-0x00000000013C0000-0x00000000016E4000-memory.dmp

    Filesize

    3.1MB

  • memory/2060-2-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

    Filesize

    9.9MB

  • memory/2060-9-0x000007FEF5DD0000-0x000007FEF67BC000-memory.dmp

    Filesize

    9.9MB