Overview

overview

10

Static

static

10

sub_13828b390d5f.exe

windows10-2004-x64

10

sub_13828b390d5f.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20260513-en
  • resource tags

    arch:x64arch:x86image:win11-20260513-enlocale:en-usos:windows11-21h2-x64systemwindows
  • submitted
    24/05/2026, 01:32

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General

  • Target
    sub_13828b390d5f.exe
  • Size 2.9MB
  • Sample260524-byf86sg151
  • SHA256 13828b390d5f58b002e808c2c4f02fdd920e236cc8015480fa33b6c1a9300e31
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
discoveryblackcatransomware

Malware Config

Extracted

Family

  • blackcat

Credentials
  • Username

    NANOFOCUS.LOCAL\Administrator
  • Password

    368CkbIna?#
Attributes
  • enable_network_discovery

    true

  • enable_self_propagation

    true

  • enable_set_wallpaper

    true

  • extension

    mfqssdj

  • note_file_name

    RECOVER-${EXTENSION}-FILES.txt

  • note_full_text

    >> What happened? Important files on your network was ENCRYPTED and now they have "${EXTENSION}" extension. In order to recover your files you need to follow instructions below. >> Sensitive Data Sensitive data on your system was DOWNLOADED. If you DON'T WANT your sensitive data to be PUBLISHED you have to act quickly. Data includes: - Employees personal data, CVs, DL, SSN. - Complete network map including credentials for local and remote services. - Private financial information including: clients data, bills, budgets, annual reports, bank statements. - Manufacturing documents including: datagrams, schemas, drawings in solidworks format. - Source code. -And more... >> CAUTION DO NOT MODIFY ENCRYPTED FILES YOURSELF. DO NOT USE THIRD PARTY SOFTWARE TO RESTORE YOUR DATA. YOU MAY DAMAGE YOUR FILES, IT WILL RESULT IN PERMANENT DATA LOSS. >> What should I do next? Follow these simple steps to get everything back to normal: 1) Download and install Tor Browser from: https://torproject.org/ 2) Navigate to: http://b4twqa2mvob3s6uvuyfra5xk3qgps2v5kkt7k2qnb7rpdu3j4fkntead.onion/?access-key=${ACCESS_KEY}

rsa_pubkey.plain

Signatures

  • Family: BlackCat

    A Rust-based ransomware sold as RaaS first seen in late 2021.

    ransomwareblackcat
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery

Processes

  • C:\Users\Admin\AppData\Local\Temp\sub_13828b390d5f.exe
    "C:\Users\Admin\AppData\Local\Temp\sub_13828b390d5f.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:2416

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        memory/2416-0-0x0000000000400000-0x00000000006F4000-memory.dmp
        Download