Overview

overview

10

Static

static

10

Client-built.exe

windows10-2004-x64

10

Client-built.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    Client-built.exe
  • Size 3.1MB
  • Sample260413-js7g6sfs8j
  • SHA256 5b0a18e6a2b26cbb732a66f69a554d1794a2fa7aced6457e1f6f53aefaed5ff6
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
office04quasar

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • www.msn168.com.tw:4782

  • www.msn168.com.tw:443

  • www.msn168.com.tw:6606

  • www.msn168.com.tw:8844

  • www.msn168.com.tw:7707

  • www.msn168.com.tw:53

  • www.msn168.com.tw:22

  • www.msn168.com.tw:8808

Mutex

  • 3ea0b8ef-2f97-4629-ac32-b1ca15cdbfa6

Attributes
  • encryption_key

    4560792E9B8260B69CFAA6F208427A6A2AA4AF22

  • install_name

    Client.exe

  • key_salt

    bfeb1e56fbcd973bb219022430a57843003d5644d21e62b9d4f180e7e6c33941

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Quasar Client Startup

  • subdirectory

    SubDir

Signatures

  • Quasar family
    quasar
  • Quasar payload 1 IoCs
  • Unsigned PE 1 IoCs

    Checks for missing Authenticode signature.

File Explorer

  • Client-built.exe
    .exe 3.1MB

Client-built.exe

  • IMPHASH f34d5f2d4577ed6d9ceec516c1f5a744
  • SHA256 5b0a18e6a2b26cbb732a66f69a554d1794a2fa7aced6457e1f6f53aefaed5ff6
  • MD5 SHA1 SHA512 SSDEEP TLSH
windows:4windowsx86arch:x86

  • Quasar payload

  • Unsigned PE

    Checks for missing Authenticode signature.

Minor OS version
0
Major OS version
4
Entry point
3270110
Magic Number
267
Subsystem
IMAGE_SUBSYSTEM_WINDOWS_GUI
DLL Characteristics
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_32BIT_MACHINE
PDB paths