Analysis

  • max time kernel
    132s
  • max time network
    148s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    16-01-2025 00:35

General

  • Target

    222.exe

  • Size

    3.1MB

  • MD5

    12f79c4859c66ba550b2b0a23421209c

  • SHA1

    c9105f035bde2e0ff30df75b2be4b82f2c891a07

  • SHA256

    5f8cd02b16b38230d9bef9d35052838ab3fd8e67bf2cfc82c89cd62d8eb9fca6

  • SHA512

    810274c5bebdb31dcde9189b4d2874623ae1c82c457b7c3aa0f11d6718fb70568dba6ef0de4cac3e670596fb75179f822f4865113570710368880e221f84472c

  • SSDEEP

    49152:Dvhuf2NUaNmwzPWlvdaKM7ZxTwLp+zYBxw/oGdyqTHHB72eh2NT:Dv8f2NUaNmwzPWlvdaB7ZxTwQzT

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

10.0.0.85:4782

172.16.0.2:4782

192.168.56.1:4782

Mutex

70b15695-83fa-49d5-9ab7-d6837c0bfe04

Attributes
  • encryption_key

    CE951E8DBE6E2FB19D206CC546AB1C2DB4750281

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    1

  • startup_key

    Solara

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar family
  • Quasar payload 2 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 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\222.exe
    "C:\Users\Admin\AppData\Local\Temp\222.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1248
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Solara" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:3472
    • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3612
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "Solara" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:2964

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Roaming\SubDir\Client.exe

    Filesize

    3.1MB

    MD5

    12f79c4859c66ba550b2b0a23421209c

    SHA1

    c9105f035bde2e0ff30df75b2be4b82f2c891a07

    SHA256

    5f8cd02b16b38230d9bef9d35052838ab3fd8e67bf2cfc82c89cd62d8eb9fca6

    SHA512

    810274c5bebdb31dcde9189b4d2874623ae1c82c457b7c3aa0f11d6718fb70568dba6ef0de4cac3e670596fb75179f822f4865113570710368880e221f84472c

  • memory/1248-1-0x0000000000780000-0x0000000000AA4000-memory.dmp

    Filesize

    3.1MB

  • memory/1248-0-0x00007FFBFD203000-0x00007FFBFD205000-memory.dmp

    Filesize

    8KB

  • memory/1248-2-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

    Filesize

    10.8MB

  • memory/1248-10-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

    Filesize

    10.8MB

  • memory/3612-9-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

    Filesize

    10.8MB

  • memory/3612-11-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

    Filesize

    10.8MB

  • memory/3612-12-0x000000001B850000-0x000000001B8A0000-memory.dmp

    Filesize

    320KB

  • memory/3612-13-0x000000001C190000-0x000000001C242000-memory.dmp

    Filesize

    712KB

  • memory/3612-14-0x00007FFBFD200000-0x00007FFBFDCC1000-memory.dmp

    Filesize

    10.8MB