Analysis

  • max time kernel
    150s
  • max time network
    142s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231127-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231127-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14-12-2023 08:15

General

  • Target

    f0207a4a17b47cba7d87142363b12477.exe

  • Size

    3.1MB

  • MD5

    f0207a4a17b47cba7d87142363b12477

  • SHA1

    c2203e69e92e6ba6394e6f711429fadf8b65845e

  • SHA256

    d2835aa9243d529d8d44846d383f97f1bb7b976bc4c378d29d2387d1ba6c1d09

  • SHA512

    35f37bb38a070220dbe9f6511ab5bf8bca07fae46b5edefa5356a9294fc98b97735719410887b40776a7232711620f5c92f6bb45a7a54d597faef675196da810

  • SSDEEP

    49152:Kvpt62XlaSFNWPjljiFa2RoUYIAunRJ65bR3LoGdcTHHB72eh2NT:Kvj62XlaSFNWPjljiFXRoUYIAunRJ67

Malware Config

Extracted

Family

quasar

Version

1.4.1

Botnet

Office04

C2

127.0.0.1:4782

Mutex

4b2195e4-fb92-4868-914b-7332837f4388

Attributes
  • encryption_key

    26FFD71DADD23C1D90404D858942E1C47093C7CF

  • install_name

    Synecs.exe

  • log_directory

    pergs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 2 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f0207a4a17b47cba7d87142363b12477.exe
    "C:\Users\Admin\AppData\Local\Temp\f0207a4a17b47cba7d87142363b12477.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4908
    • C:\Users\Admin\AppData\Roaming\SubDir\Synecs.exe
      "C:\Users\Admin\AppData\Roaming\SubDir\Synecs.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      PID:2752

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

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

    Filesize

    3.1MB

    MD5

    f0207a4a17b47cba7d87142363b12477

    SHA1

    c2203e69e92e6ba6394e6f711429fadf8b65845e

    SHA256

    d2835aa9243d529d8d44846d383f97f1bb7b976bc4c378d29d2387d1ba6c1d09

    SHA512

    35f37bb38a070220dbe9f6511ab5bf8bca07fae46b5edefa5356a9294fc98b97735719410887b40776a7232711620f5c92f6bb45a7a54d597faef675196da810

  • memory/2752-8-0x00007FFCCD0C0000-0x00007FFCCDB81000-memory.dmp

    Filesize

    10.8MB

  • memory/2752-10-0x000000001B1D0000-0x000000001B1E0000-memory.dmp

    Filesize

    64KB

  • memory/2752-11-0x000000001BAD0000-0x000000001BB20000-memory.dmp

    Filesize

    320KB

  • memory/2752-12-0x000000001BBE0000-0x000000001BC92000-memory.dmp

    Filesize

    712KB

  • memory/2752-13-0x00007FFCCD0C0000-0x00007FFCCDB81000-memory.dmp

    Filesize

    10.8MB

  • memory/2752-14-0x000000001B1D0000-0x000000001B1E0000-memory.dmp

    Filesize

    64KB

  • memory/4908-0-0x00000000009E0000-0x0000000000D06000-memory.dmp

    Filesize

    3.1MB

  • memory/4908-1-0x00007FFCCD0C0000-0x00007FFCCDB81000-memory.dmp

    Filesize

    10.8MB

  • memory/4908-2-0x000000001B940000-0x000000001B950000-memory.dmp

    Filesize

    64KB

  • memory/4908-9-0x00007FFCCD0C0000-0x00007FFCCDB81000-memory.dmp

    Filesize

    10.8MB