Overview

overview

10

Static

static

10

backutil.exe

windows10-2004-x64

10

backutil.exe

windows11-21h2-x64

10

Sharing

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General

  • Target
    backutil.exe
  • Size 64KB
  • Sample260306-ryadmaav6z
  • SHA256 32857e2a8ef4cfc04b1e62b939cf979a428cfb09bb3bb3a998a37c3a1e96f697
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
asyncratdefense_evasionexecutionpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 1.0.7

C2

  • fly88.limited:4782

  • fly88.limited:8808

  • fly88.limited:6666

  • fly88.limited:443

  • fly88.limited:8888

  • fly88.limited:8848

  • c168.casino:4782

  • c168.casino:8808

  • c168.casino:6666

  • c168.casino:443

  • c168.casino:8888

  • c168.casino:8848

  • c168.fund:4782

  • c168.fund:8808

  • c168.fund:6666

  • c168.fund:443

  • c168.fund:8888

  • c168.fund:8848

  • OK8386.CHEAP:4782

  • OK8386.CHEAP:8808

Mutex

  • BackUtil

Attributes
  • delay

    1

  • install

    true

  • install_file

    backutil.exe

  • install_folder

    %AppData%

aes.plain

Targets

    • Target
      backutil.exe
    • Size 64KB
    • SHA256 32857e2a8ef4cfc04b1e62b939cf979a428cfb09bb3bb3a998a37c3a1e96f697
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    defense_evasionexecutionasyncratpersistencerat

    • AsyncRat

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

      ratasyncrat

    • Asyncrat family

      asyncrat

    • Async RAT payload

      rat

    • Checks computer location settings

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

    • Executes dropped EXE

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Tasks