Analysis

  • max time kernel
    52s
  • max time network
    54s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04-08-2024 16:44

General

  • Target

    celery installer.exe

  • Size

    3.1MB

  • MD5

    45f959942912fbcd1653b538332c5ec9

  • SHA1

    7fdcd65b7bd7d5bdbc279e0b4fa6eebb8c36fca1

  • SHA256

    6b400e1fc91d48c849aa79f355b641d35658188d668686ad7192333e9b92a1ae

  • SHA512

    9072548e7a5e8f92a910c8621ff1a67fba6dcc4aa3c7af82047bdfdb86165d6d3466ed32081ef87816ccc04b6549367ec65fa2d69e8865ef0d42b6befe26f466

  • SSDEEP

    49152:PvflL26AaNeWgPhlmVqvMQ7XSK5+DkE2Hak/+F+oGdzuLTHHB72eh2NT:PvtL26AaNeWgPhlmVqkQ7XSK5+DbQC

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

Joesnazzy-26854.portmap.host:26854

Mutex

0e3df0a7-c843-43da-81c8-d9c01f85801a

Attributes
  • encryption_key

    FE31C9B3146C7F6C565D8024D45CF71A2F7A3888

  • install_name

    celery.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    windows defender

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 5 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\celery installer.exe
    "C:\Users\Admin\AppData\Local\Temp\celery installer.exe"
    1⤵
    • Drops file in System32 directory
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3548
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "windows defender" /sc ONLOGON /tr "C:\Windows\system32\SubDir\celery.exe" /rl HIGHEST /f
      2⤵
      • Scheduled Task/Job: Scheduled Task
      PID:1492
    • C:\Windows\system32\SubDir\celery.exe
      "C:\Windows\system32\SubDir\celery.exe"
      2⤵
      • Executes dropped EXE
      • Drops file in System32 directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4500
      • C:\Windows\SYSTEM32\schtasks.exe
        "schtasks" /create /tn "windows defender" /sc ONLOGON /tr "C:\Windows\system32\SubDir\celery.exe" /rl HIGHEST /f
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:216

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    3.1MB

    MD5

    45f959942912fbcd1653b538332c5ec9

    SHA1

    7fdcd65b7bd7d5bdbc279e0b4fa6eebb8c36fca1

    SHA256

    6b400e1fc91d48c849aa79f355b641d35658188d668686ad7192333e9b92a1ae

    SHA512

    9072548e7a5e8f92a910c8621ff1a67fba6dcc4aa3c7af82047bdfdb86165d6d3466ed32081ef87816ccc04b6549367ec65fa2d69e8865ef0d42b6befe26f466

  • memory/3548-0-0x00007FFA3B983000-0x00007FFA3B985000-memory.dmp

    Filesize

    8KB

  • memory/3548-1-0x0000000000680000-0x00000000009A4000-memory.dmp

    Filesize

    3.1MB

  • memory/3548-2-0x00007FFA3B980000-0x00007FFA3C441000-memory.dmp

    Filesize

    10.8MB

  • memory/3548-9-0x00007FFA3B980000-0x00007FFA3C441000-memory.dmp

    Filesize

    10.8MB

  • memory/4500-10-0x00007FFA3B980000-0x00007FFA3C441000-memory.dmp

    Filesize

    10.8MB

  • memory/4500-11-0x00007FFA3B980000-0x00007FFA3C441000-memory.dmp

    Filesize

    10.8MB

  • memory/4500-12-0x000000001BA90000-0x000000001BAE0000-memory.dmp

    Filesize

    320KB

  • memory/4500-13-0x000000001C3E0000-0x000000001C492000-memory.dmp

    Filesize

    712KB

  • memory/4500-14-0x00007FFA3B980000-0x00007FFA3C441000-memory.dmp

    Filesize

    10.8MB