General

  • Target
    Client-built.exe
  • Size 898KB
  • Sample261027-pxewlstyb1
  • SHA256 6736277b01741744fed0b7040ffda822a7810a6b7ef0faa6c79c2a7fc33da541
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • quasar

Version
  • 1.5.1

Botnet
  • dsc.gg/un1x

C2
  • openport.pw:43910

Mutex
  • b793e3e0-a400-4de4-b8c2-5204267d2218

Attributes
  • encryption_key

    CB770BFF9A5C5A8F92F2B4E2FE12549CF3DC3381

  • install_name

    OfficeUpdater.exe

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • log_directory

    Logs

  • reconnect_delay

    2997

  • startup_key

    Microsoft Updater

  • subdirectory

    MicrosoftOffice

Signatures

  • Family: Quasar RAT

    Quasar is an open source Remote Access Tool.

  • Quasar payload 1 IoCs
  • Unsigned PE 10 IoCs

    Checks for missing Authenticode signature.

File Explorer

  • Client-built.exe
    .exe 898KB
  • aforge.dll
    .dll 17KB
  • aforge.video.directshow.dll
    .dll 60KB
  • aforge.video.dll
    .dll 20KB
  • gma.system.mousekeyhook.dll
    .dll 56KB
  • protobuf-net.dll
    .dll 284KB
  • pulsar.common.dll
    .dll 80KB
  • sharpdx.direct3d11.dll
    .dll 276KB
  • sharpdx.direct3d11.pdb
    76KB
  • sharpdx.dll
    .dll 268KB
  • sharpdx.dxgi.dll
    .dll 145KB
  • sharpdx.dxgi.pdb
    33KB
  • sharpdx.pdb
    41KB

Client-built.exe

  • IMPHASH f34d5f2d4577ed6d9ceec516c1f5a744
  • SHA256 6736277b01741744fed0b7040ffda822a7810a6b7ef0faa6c79c2a7fc33da541
  • MD5 SHA1 SHA512 SSDEEP TLSH
  • Quasar payload

  • Unsigned PE

    Checks for missing Authenticode signature.

Minor OS version
0
Major OS version
4
Entry point
924110
Magic Number
267
Subsystem
IMAGE_SUBSYSTEM_WINDOWS_GUI
DLL Characteristics
IMAGE_DLLCHARACTERISTICS_HIGH_ENTROPY_VA IMAGE_DLLCHARACTERISTICS_DYNAMIC_BASE IMAGE_DLLCHARACTERISTICS_NX_COMPAT IMAGE_DLLCHARACTERISTICS_NO_SEH IMAGE_DLLCHARACTERISTICS_TERMINAL_SERVER_AWARE
File Characteristics
IMAGE_FILE_EXECUTABLE_IMAGE IMAGE_FILE_LARGE_ADDRESS_AWARE IMAGE_FILE_32BIT_MACHINE
PDB paths