Overview

overview

10

Static

static

10

f9cd91aa04...c2.exe

windows7-x64

10

f9cd91aa04...c2.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    f9cd91aa04919e9fe878fad738f5c8631f229da474552a245b29f0649fad96c2.exe
  • Size 3.1MB
  • Sample240319-dk37wsfh63
  • SHA256 f9cd91aa04919e9fe878fad738f5c8631f229da474552a245b29f0649fad96c2
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
office04quasar

Malware Config

Extracted

Family

  • quasar

Version

  • 1.4.1

Botnet

  • Office04

C2

  • authapi-41985.portmap.host:41985

Mutex

  • 50fd280e-bda2-413a-9ebd-86236f4b0beb

Attributes
  • encryption_key

    E429F24E279E8B25742D0F5347151B0F90D031CA

  • install_name

    system.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    system

  • subdirectory

    SubDir

Signatures

  • Detects Windows executables referencing non-Windows User-Agents 1 IoCs
  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers. 1 IoCs
  • Detects executables containing common artifacts observed in infostealers 1 IoCs
  • Quasar family
    quasar
  • Quasar payload 1 IoCs
  • Unsigned PE 1 IoCs

    Checks for missing Authenticode signature.

File Explorer

  • f9cd91aa04919e9fe878fad738f5c8631f229da474552a245b29f0649fad96c2.exe
    .exe 3.1MB

f9cd91aa04919e9fe878fad738f5c8631f229da474552a245b29f0649fad96c2.exe

  • IMPHASH f34d5f2d4577ed6d9ceec516c1f5a744
  • SHA256 f9cd91aa04919e9fe878fad738f5c8631f229da474552a245b29f0649fad96c2
  • MD5 SHA1 SHA512 SSDEEP
windows:4windowsx86arch:x86

  • Detects Windows executables referencing non-Windows User-Agents

  • Detects binaries (Windows and macOS) referencing many web browsers. Observed in information stealers.

  • Detects executables containing common artifacts observed in infostealers

  • Quasar payload

  • Unsigned PE

    Checks for missing Authenticode signature.

Minor OS version
0
Major OS version
4
Entry point
3269614
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