Overview

overview

10

Static

static

10

Infected.exe

windows10-2004-x64

Infected.exe

windows11-ltsc_2024-x64

10

Sharing

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General

  • Target
    Infected.exe
  • Size 14.0MB
  • Sample260706-19m9ashy3m
  • SHA256 f79db6136d485d3428afd30ea0ce9d0d5fe5e56afd3ae7793db0dbb4669d3633
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
asyncratdefaultbootkitdefense_evasiondiscoveryexecutionpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Botnet

  • Default

Attributes
  • delay

    1

  • install

    true

  • install_file

    kuromi.exe

  • install_folder

    %AppData%

  • local_host

    127.0.0.1

aes.plain

Targets

    • Target
      Infected.exe
    • Size 14.0MB
    • SHA256 f79db6136d485d3428afd30ea0ce9d0d5fe5e56afd3ae7793db0dbb4669d3633
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    bootkitdefaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

    • Family: AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers written in C#.

      ratasyncrat

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Drops file in System32 directory

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks