Analysis

  • max time kernel
    147s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20231130-en
  • resource tags

    arch:x64arch:x86image:win7-20231130-enlocale:en-usos:windows7-x64system
  • submitted
    14-12-2023 08:15

General

  • Target

    Syences.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 4 IoCs
  • Executes dropped EXE 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 3 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Syences.exe
    "C:\Users\Admin\AppData\Local\Temp\Syences.exe"
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2836
    • 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:2164

Network

MITRE ATT&CK Matrix

Replay Monitor

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Downloads

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

    Filesize

    257KB

    MD5

    494b53b10bb481411a100d25903b13d0

    SHA1

    e6275e6476f69dfd041130a2c3d233f9a8272813

    SHA256

    bc13fef4c2983cb34cfe6d4aa7b479661bdcb9ee0d9634eeb2a7831dbd5e4f36

    SHA512

    e3244b86e62814a29a8bec2d4b21714c24a3df3312df8cc44b49e27d35edf9b7ac9a645fd3eaef564f0e62717170ff5c8d4e6b32d8b79d3b809f92b45e5f0f2d

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

    Filesize

    202KB

    MD5

    1f67224f6ee752d3c444263351ca600c

    SHA1

    32938293d6ef272fe4cbb0f605020bd3caf24929

    SHA256

    0ef1f9014c07fc422e7d9d767bd3fc012e138e2429ee63c752d838407fcba66d

    SHA512

    51ff4c3cf0cc149b1a8ddb6460828119972c7437de7aa142e1f02f64265609629e76732e1254f61bbda392f30d0659ee9bf58273680297e6fd18e602ba660e26

  • memory/2164-7-0x00000000013C0000-0x00000000016E6000-memory.dmp

    Filesize

    3.1MB

  • memory/2164-8-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

    Filesize

    9.9MB

  • memory/2164-9-0x000000001B160000-0x000000001B1E0000-memory.dmp

    Filesize

    512KB

  • memory/2164-11-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

    Filesize

    9.9MB

  • memory/2164-12-0x000000001B160000-0x000000001B1E0000-memory.dmp

    Filesize

    512KB

  • memory/2836-0-0x0000000000080000-0x00000000003A6000-memory.dmp

    Filesize

    3.1MB

  • memory/2836-1-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

    Filesize

    9.9MB

  • memory/2836-2-0x000000001B2B0000-0x000000001B330000-memory.dmp

    Filesize

    512KB

  • memory/2836-10-0x000007FEF5C70000-0x000007FEF665C000-memory.dmp

    Filesize

    9.9MB