Analysis

  • max time kernel
    156s
  • max time network
    167s
  • platform
    windows11-21h2_x64
  • resource
    win11-20231128-en
  • resource tags

    arch:x64arch:x86image:win11-20231128-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    01-12-2023 05:13

General

  • Target

    loldestroyer.exe

  • Size

    3.1MB

  • MD5

    fd19dff19426de33ff1b16ea4ba48b55

  • SHA1

    45200a4b3f66eca4374e7efe40ae08775b1716b6

  • SHA256

    48c104cd33329e1faf768c90d9dbd6dee4e820ee61c647ab1597941cdae5a476

  • SHA512

    260a1a3058216e91e687f630d3bdf12cb55e506b2caa53ab7a6518cb1437405e6e00fee10bb5988b40fb84cf714817a68ab81678a36b889a72e9720c770d6241

  • SSDEEP

    49152:ivBt62XlaSFNWPjljiFa2RoUYIUpw2bR00LoGdQTHHB72eh2NT:ivr62XlaSFNWPjljiFXRoUYIUpwh6

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

2.tcp.us-cal-1.ngrok.io:11792

Mutex

831d9989-b01a-4dcf-bf1b-dfc5c9ff4d48

Attributes
  • encryption_key

    EB1C9E3AFC9D36808D51DFE00497AE60B97F0817

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    epic

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 3 IoCs
  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Legitimate hosting services abused for malware hosting/C2 1 TTPs
  • Drops file in System32 directory 5 IoCs
  • 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 6 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\loldestroyer.exe
    "C:\Users\Admin\AppData\Local\Temp\loldestroyer.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1716
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "epic" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:5080
    • C:\Windows\system32\SubDir\Client.exe
      "C:\Windows\system32\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2972
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "epic" /sc ONLOGON /tr "C:\Windows\system32\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:3672

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Windows\System32\SubDir\Client.exe

    Filesize

    3.1MB

    MD5

    fd19dff19426de33ff1b16ea4ba48b55

    SHA1

    45200a4b3f66eca4374e7efe40ae08775b1716b6

    SHA256

    48c104cd33329e1faf768c90d9dbd6dee4e820ee61c647ab1597941cdae5a476

    SHA512

    260a1a3058216e91e687f630d3bdf12cb55e506b2caa53ab7a6518cb1437405e6e00fee10bb5988b40fb84cf714817a68ab81678a36b889a72e9720c770d6241

  • C:\Windows\system32\SubDir\Client.exe

    Filesize

    3.1MB

    MD5

    fd19dff19426de33ff1b16ea4ba48b55

    SHA1

    45200a4b3f66eca4374e7efe40ae08775b1716b6

    SHA256

    48c104cd33329e1faf768c90d9dbd6dee4e820ee61c647ab1597941cdae5a476

    SHA512

    260a1a3058216e91e687f630d3bdf12cb55e506b2caa53ab7a6518cb1437405e6e00fee10bb5988b40fb84cf714817a68ab81678a36b889a72e9720c770d6241

  • memory/1716-9-0x00007FFB20680000-0x00007FFB21142000-memory.dmp

    Filesize

    10.8MB

  • memory/1716-1-0x00007FFB20680000-0x00007FFB21142000-memory.dmp

    Filesize

    10.8MB

  • memory/1716-2-0x000000001B920000-0x000000001B930000-memory.dmp

    Filesize

    64KB

  • memory/1716-0-0x0000000000690000-0x00000000009B4000-memory.dmp

    Filesize

    3.1MB

  • memory/2972-14-0x00007FFB20680000-0x00007FFB21142000-memory.dmp

    Filesize

    10.8MB

  • memory/2972-17-0x000000001BA80000-0x000000001BABC000-memory.dmp

    Filesize

    240KB

  • memory/2972-12-0x00000000027A0000-0x00000000027F0000-memory.dmp

    Filesize

    320KB

  • memory/2972-13-0x000000001BB00000-0x000000001BBB2000-memory.dmp

    Filesize

    712KB

  • memory/2972-10-0x00007FFB20680000-0x00007FFB21142000-memory.dmp

    Filesize

    10.8MB

  • memory/2972-15-0x000000001B340000-0x000000001B350000-memory.dmp

    Filesize

    64KB

  • memory/2972-16-0x000000001B2F0000-0x000000001B302000-memory.dmp

    Filesize

    72KB

  • memory/2972-11-0x000000001B340000-0x000000001B350000-memory.dmp

    Filesize

    64KB

  • memory/2972-18-0x000000001C610000-0x000000001C7C3000-memory.dmp

    Filesize

    1.7MB

  • memory/2972-19-0x000000001C610000-0x000000001C7C3000-memory.dmp

    Filesize

    1.7MB

  • memory/2972-20-0x000000001C610000-0x000000001C7C3000-memory.dmp

    Filesize

    1.7MB

  • memory/2972-21-0x000000001C610000-0x000000001C7C3000-memory.dmp

    Filesize

    1.7MB

  • memory/2972-22-0x000000001C610000-0x000000001C7C3000-memory.dmp

    Filesize

    1.7MB

  • memory/2972-23-0x000000001C610000-0x000000001C7C3000-memory.dmp

    Filesize

    1.7MB