Overview

overview

10

Static

static

10

Client-built.exe

windows7-x64

10

Client-built.exe

windows10-1703-x64

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 348KB
  • Sample240323-yn5kcaeb6s
  • SHA256 169c150e8f08da5a4ab2b46bc67cdd1d2d006a060b39d66e559dbfdc53017414
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
office04quasar

Malware Config

Extracted

Family

  • quasar

Version

  • 1.3.0.0

Botnet

  • Office04

C2

  • Vallithebest-32755.portmap.host:32755

Mutex

  • QSR_MUTEX_3gXoc7Rbb6gDK9k7Ha

Attributes
  • encryption_key

    MgIQlrEArYoUL3gDO4iZ

  • install_name

    WindowsSound.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    WindowsSound.exe

  • 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 348KB

Client-built.exe

  • IMPHASH f34d5f2d4577ed6d9ceec516c1f5a744
  • SHA256 169c150e8f08da5a4ab2b46bc67cdd1d2d006a060b39d66e559dbfdc53017414
  • MD5 SHA1 SHA512 SSDEEP
windows:4windowsx86arch:x86

  • Quasar payload

  • Unsigned PE

    Checks for missing Authenticode signature.

Minor OS version
0
Major OS version
4
Entry point
361038
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