Analysis

  • max time kernel
    191s
  • max time network
    250s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-12-2023 23:21

General

  • Target

    aabb.exe

  • Size

    3.1MB

  • MD5

    8295dfdc857537c3ecf20b85aae299cc

  • SHA1

    3a0afcd9e6717d9485eef03b0f025dbac1f36891

  • SHA256

    644b2903e1c8b5d6b63335e409b1d624e1bdf620de4bacab2d54c0bef69e5dae

  • SHA512

    6fb6c4d7b122d5c7eb1f05ed938020589c093db5cbae0addcc4c274f383057155aa1f6e9c85840f1a3a3f5fb0996cbfade6f4a124889e105e32cbf194c046936

  • SSDEEP

    49152:DvcG42pda6D+/PjlLOlg6yQipV/x0qb6jv04Loyd2iTHHB72eh2NT:Dvn42pda6D+/PjlLOlZyQipVb6z

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

0.tcp.eu.ngrok.io:15683

tcp.kochambeton.pl:1337

Mutex

99a331b1-13b5-4e73-be8f-b5c19bd595ef

Attributes
  • encryption_key

    E31FE4ECA57A8B089443D8B26651DAD7DB7A12F8

  • install_name

    Client.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Counter Strike Global Offensive

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 2 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\aabb.exe
    "C:\Users\Admin\AppData\Local\Temp\aabb.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3776
    • C:\Windows\SYSTEM32\schtasks.exe
      "schtasks" /create /tn "Counter Strike Global Offensive" /sc ONLOGON /tr "C:\Users\Admin\AppData\Roaming\SubDir\Client.exe" /rl HIGHEST /f
      2⤵
      • Creates scheduled task(s)
      PID:2516

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • memory/3776-0-0x0000000000D80000-0x00000000010A4000-memory.dmp

    Filesize

    3.1MB

  • memory/3776-1-0x00007FFCE32C0000-0x00007FFCE3D81000-memory.dmp

    Filesize

    10.8MB

  • memory/3776-2-0x000000001BFA0000-0x000000001BFB0000-memory.dmp

    Filesize

    64KB

  • memory/3776-4-0x00007FFCE32C0000-0x00007FFCE3D81000-memory.dmp

    Filesize

    10.8MB

  • memory/3776-5-0x000000001BFA0000-0x000000001BFB0000-memory.dmp

    Filesize

    64KB