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 899KB
  • Sample260305-jsas7set3l
  • SHA256 5998e0267bb2a4ed86a7981857fdea8982d2d8be09c1aaeffdc43f5dd05fa2fd
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
dsc.gg/un1xquasar

Malware Config

Extracted

Family

  • quasar

Version

  • 1.5.1

Botnet

  • dsc.gg/un1x

C2

  • tcp3.tunnel4.com:40271

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

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

    Checks for missing Authenticode signature.

File Explorer

  • Client-built.exe
    .exe 899KB

Client-built.exe

  • IMPHASH f34d5f2d4577ed6d9ceec516c1f5a744
  • SHA256 5998e0267bb2a4ed86a7981857fdea8982d2d8be09c1aaeffdc43f5dd05fa2fd
  • 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
924414
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