Analysis

  • max time kernel
    148s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-04-2024 02:11

General

  • Target

    9e1276a64065335038649c9c55137633d4b02b0a3d564635f621f41b5890b326.exe

  • Size

    3.1MB

  • MD5

    e9633057e16f92098ddc3a798feeaff2

  • SHA1

    3923362ecc24bbc6c61eda73caecaccb83511573

  • SHA256

    9e1276a64065335038649c9c55137633d4b02b0a3d564635f621f41b5890b326

  • SHA512

    48b60794cf45127452de0b69f9275de62243e3ef5c7f65b7c7f0701d1cbc91b1fe1e6e7b8f5d543298ab88692210e60ca50b0b88f2d4221c3d7190eb0aaeb3a9

  • SSDEEP

    49152:3vrI22SsaNYfdPBldt698dBcjHXXo8dpDVoGdi5THHB72eh2NT:3vU22SsaNYfdPBldt6+dBcjHnoe

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

LunasLove-64385.portmap.host:64385

Mutex

508f4b75-ce7c-432c-b5a7-7763b93b6ac5

Attributes
  • encryption_key

    76EBDC42E51E79D0A828180D2490940F63BFFF8C

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WindowsClient

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Detects Windows executables referencing non-Windows User-Agents 2 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 2 IoCs
  • Detects executables containing common artifacts observed in infostealers 2 IoCs
  • Executes dropped EXE 1 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\9e1276a64065335038649c9c55137633d4b02b0a3d564635f621f41b5890b326.exe
    "C:\Users\Admin\AppData\Local\Temp\9e1276a64065335038649c9c55137633d4b02b0a3d564635f621f41b5890b326.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3928
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "WindowsClient" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:3152
    • 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:4240
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "WindowsClient" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
        3⤵
        • Creates scheduled task(s)
        PID:2756

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

    e9633057e16f92098ddc3a798feeaff2

    SHA1

    3923362ecc24bbc6c61eda73caecaccb83511573

    SHA256

    9e1276a64065335038649c9c55137633d4b02b0a3d564635f621f41b5890b326

    SHA512

    48b60794cf45127452de0b69f9275de62243e3ef5c7f65b7c7f0701d1cbc91b1fe1e6e7b8f5d543298ab88692210e60ca50b0b88f2d4221c3d7190eb0aaeb3a9

  • memory/3928-0-0x0000000000FD0000-0x00000000012F4000-memory.dmp

    Filesize

    3.1MB

  • memory/3928-1-0x00007FFB6C9E0000-0x00007FFB6D4A1000-memory.dmp

    Filesize

    10.8MB

  • memory/3928-2-0x0000000003490000-0x00000000034A0000-memory.dmp

    Filesize

    64KB

  • memory/3928-9-0x00007FFB6C9E0000-0x00007FFB6D4A1000-memory.dmp

    Filesize

    10.8MB

  • memory/4240-10-0x00007FFB6C9E0000-0x00007FFB6D4A1000-memory.dmp

    Filesize

    10.8MB

  • memory/4240-11-0x000000001BBD0000-0x000000001BBE0000-memory.dmp

    Filesize

    64KB

  • memory/4240-12-0x000000001BB60000-0x000000001BBB0000-memory.dmp

    Filesize

    320KB

  • memory/4240-13-0x000000001C4C0000-0x000000001C572000-memory.dmp

    Filesize

    712KB

  • memory/4240-14-0x00007FFB6C9E0000-0x00007FFB6D4A1000-memory.dmp

    Filesize

    10.8MB

  • memory/4240-15-0x000000001BBD0000-0x000000001BBE0000-memory.dmp

    Filesize

    64KB