General

  • Target
    Windows Security Health Service.exe
  • Size 2.6MB
  • Sample260925-hf2wgssbnd
  • SHA256 6cce95ac0f8bb78b51231045897b8cc751b8749e776c99b1dbf61cde5bb684c1
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • quasar

Version
  • 1.6.6

Botnet
  • Office04

C2
  • 83.150.218.55:9768

Mutex
  • 73fd5ea6-c65a-45bf-a7ba-ad64a570d552

Attributes
  • encryption_key

    7799F230382DEC15CFC54F1D560B5A8B875621D2

  • install_name

    Windows Security Health Service.exe

  • key_salt

    5a23f8394640cb9e40658446a04c0bbae82dc93d0470e1b2a406a90fd2520382

  • log_directory

    logs

  • reconnect_delay

    3000

  • startup_key

    Windows Security Health Service

  • subdirectory

    system32

Signatures

  • Family: Quasar RAT

    Quasar is an open source Remote Access Tool.

  • PulsaRAT library module 1 IoCs

    Core component of the PulsaRAT remote access trojan, implementing its command protocol for hidden remote desktop, UAC bypass, persistence, and credential theft.

  • Quasar payload 1 IoCs
  • Unsigned PE 18 IoCs

    Checks for missing Authenticode signature.

File Explorer

  • Windows Security Health Service.exe
    .exe 2.6MB
  • aforge.dll
    .dll 17KB
  • aforge.video.directshow.dll
    .dll 60KB
  • aforge.video.dll
    .dll 20KB
  • gma.system.mousekeyhook.dll
    .dll 56KB
  • naudio.core.dll
    .dll 183KB
  • naudio.wasapi.dll
    .dll 175KB
  • naudio.winforms.dll
    .dll 40KB
  • naudio.winmm.dll
    .dll 56KB
  • protobuf-net.core.dll
    .dll 283KB
  • protobuf-net.dll
    .dll 271KB
  • pulsar.common.dll
    .dll 93KB
  • sharpdx.d3dcompiler.dll
    .dll 57KB
  • sharpdx.d3dcompiler.pdb
    21KB
  • sharpdx.direct2d1.dll
    .dll 484KB
  • sharpdx.direct2d1.pdb
    209KB
  • sharpdx.direct3d11.dll
    .dll 276KB
  • sharpdx.direct3d11.pdb
    76KB
  • sharpdx.dll
    .dll 268KB
  • sharpdx.dxgi.dll
    .dll 145KB
  • sharpdx.dxgi.pdb
    33KB
  • sharpdx.mathematics.dll
    .dll 210KB
  • sharpdx.mathematics.pdb
    93KB
  • sharpdx.pdb
    41KB
  • system.buffers.dll
    .dll 20KB
  • system.collections.immutable.dll
    .dll 194KB
  • system.memory.dll
    .dll 138KB
  • system.numerics.vectors.dll
    .dll 113KB
  • system.runtime.compilerservices.unsafe.dll
    .dll 18KB

Windows Security Health Service.exe

  • IMPHASH f34d5f2d4577ed6d9ceec516c1f5a744
  • SHA256 6cce95ac0f8bb78b51231045897b8cc751b8749e776c99b1dbf61cde5bb684c1
  • MD5 SHA1 SHA512 SSDEEP TLSH
  • Quasar payload

  • Unsigned PE

    Checks for missing Authenticode signature.

Minor OS version
0
Major OS version
4
Entry point
2722158
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