Analysis

  • max time kernel
    17s
  • max time network
    22s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02-08-2024 23:37

General

  • Target

    solara.exe

  • Size

    3.1MB

  • MD5

    1bdf6c7fda1c36dab1558b37aeb0d631

  • SHA1

    9f7dc44275ee93dd42a8bffba2fc905c5ea56c24

  • SHA256

    b7871caa008e2b9b56b23b6d9623064e6f773b58e5508b41001d125e29d71956

  • SHA512

    52ddf7ee9b33cbd0fbd0f753cabb32763f2789a42abe995420f6a5d79aa9f841bb3707d088c29c5a9908f7e5c008f69e6f1971d36b2e0baedbe7ab2ac0cce0ce

  • SSDEEP

    49152:evkt62XlaSFNWPjljiFa2RoUYIJCH1JjLoGdskTHHB72eh2NT:ev462XlaSFNWPjljiFXRoUYIJCX

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

192.168.86.42:4782

Mutex

eaedb9b3-efa3-4f4e-8bd1-e6323c15fea8

Attributes
  • encryption_key

    F7A22B1954257A2F04BA3A86C02C0AD9DCBB6415

  • install_name

    NovaRecoil.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    REC

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • 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\solara.exe
    "C:\Users\Admin\AppData\Local\Temp\solara.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:396
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "REC" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\NovaRecoil.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:2784
    • C:\Users\Admin\AppData\Roaming\SubDir\NovaRecoil.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\NovaRecoil.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1124
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "REC" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\NovaRecoil.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:3728

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3.1MB

    MD5

    1bdf6c7fda1c36dab1558b37aeb0d631

    SHA1

    9f7dc44275ee93dd42a8bffba2fc905c5ea56c24

    SHA256

    b7871caa008e2b9b56b23b6d9623064e6f773b58e5508b41001d125e29d71956

    SHA512

    52ddf7ee9b33cbd0fbd0f753cabb32763f2789a42abe995420f6a5d79aa9f841bb3707d088c29c5a9908f7e5c008f69e6f1971d36b2e0baedbe7ab2ac0cce0ce

  • memory/396-0-0x00007FFB449C3000-0x00007FFB449C5000-memory.dmp

    Filesize

    8KB

  • memory/396-1-0x0000000000080000-0x00000000003A4000-memory.dmp

    Filesize

    3.1MB

  • memory/396-2-0x00007FFB449C0000-0x00007FFB45481000-memory.dmp

    Filesize

    10.8MB

  • memory/396-10-0x00007FFB449C0000-0x00007FFB45481000-memory.dmp

    Filesize

    10.8MB

  • memory/1124-9-0x00007FFB449C0000-0x00007FFB45481000-memory.dmp

    Filesize

    10.8MB

  • memory/1124-11-0x00007FFB449C0000-0x00007FFB45481000-memory.dmp

    Filesize

    10.8MB

  • memory/1124-12-0x000000001BD30000-0x000000001BD80000-memory.dmp

    Filesize

    320KB

  • memory/1124-13-0x000000001BE40000-0x000000001BEF2000-memory.dmp

    Filesize

    712KB