Analysis

  • max time kernel
    60s
  • max time network
    61s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260709-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260709-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    03/08/2026, 20:39

General

  • Target
    2afc72ea741afa35e3922f0f65b06308e9919fc3d08f142b9cb753cb2ede8871.exe
  • Size 45KB
  • Sample260803-zfqa5axeke
  • SHA256 2afc72ea741afa35e3922f0f65b06308e9919fc3d08f142b9cb753cb2ede8871
  • MD5 SHA1 SHA512 SSDEEP TLSH

Malware Config

Extracted

Family
  • asyncrat

Version
  • 0.5.8

Botnet
  • Default

C2
  • twosisterstubes.com:80

  • twosisterstubes.com:22

  • twosisterstubes.com:8080

  • twosisterstubes.com:8880

  • twosisterstubes.com:2052

  • twosisterstubes.com:2082

  • twosisterstubes.com:2086

  • twosisterstubes.com:2095

  • twosisterstubes.com:443

  • twosisterstubes.com:2053

  • twosisterstubes.com:2083

  • twosisterstubes.com:2087

  • twosisterstubes.com:2096

  • twosisterstubes.com:8443

  • www.twosisterstubes.com:80

  • www.twosisterstubes.com:22

  • www.twosisterstubes.com:8080

  • www.twosisterstubes.com:8880

  • www.twosisterstubes.com:2052

  • www.twosisterstubes.com:2082

Mutex
  • LPJSpH8E8HCc

Attributes
  • delay

    0

  • install

    true

  • install_file

    5nbu.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

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

  • Async RAT payload 1 IoCs
  • Outbound SSH connection to public host 2 TTPs 2 IoCs

    SSH is used for remote access. This may indicate SSH host discovery, encrypted C2 traffic, or data exfiltration.

  • Executes a command shell one-liner 1 TTPs 2 IoCs

    Execution of a cmd.exe one-liner (/c "close" or /k "keep") is a common script/loader stage.

  • 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.

  • Delays execution with timeout.exe 1 IoCs
  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

Processes

  • C:\Users\Admin\AppData\Local\Temp\2afc72ea741afa35e3922f0f65b06308e9919fc3d08f142b9cb753cb2ede8871.exe
    "C:\Users\Admin\AppData\Local\Temp\2afc72ea741afa35e3922f0f65b06308e9919fc3d08f142b9cb753cb2ede8871.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:2820
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "5nbu" /tr '"C:\Users\Admin\AppData\Roaming\5nbu.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      PID:3364
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "5nbu" /tr '"C:\Users\Admin\AppData\Roaming\5nbu.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:4188
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp46E3.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      PID:3648
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:3320
      • C:\Users\Admin\AppData\Roaming\5nbu.exe
        "C:\Users\Admin\AppData\Roaming\5nbu.exe"
        3⤵
          PID:5044
    • C:\Users\Admin\AppData\Roaming\5nbu.exe
      "C:\Users\Admin\AppData\Roaming\5nbu.exe"
      1⤵
        PID:508

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            tmp46E3.tmp.bat

            • Path C:\Users\Admin\AppData\Local\Temp\tmp46E3.tmp.bat
            • Size 148B
            • SHA256 839baef60c2120bd0dfea08b4a2170f261be2c02ab5f11db7372dd7e39cefddd
            • MD5 SHA1 SHA512 TLSH

            5nbu.exe

            • Path C:\Users\Admin\AppData\Roaming\5nbu.exe
            • Size 45KB
            • SHA256 2afc72ea741afa35e3922f0f65b06308e9919fc3d08f142b9cb753cb2ede8871
            • MD5 SHA1 SHA512 SSDEEP TLSH

            memory/508-12-0x0000000074230000-0x00000000749EC000-memory.dmp

            memory/508-14-0x0000000074230000-0x00000000749EC000-memory.dmp

            memory/2820-0-0x00000000743B2000-0x00000000743B3000-memory.dmp

            memory/2820-1-0x00000000007E0000-0x00000000007F2000-memory.dmp

            memory/2820-2-0x00000000743A0000-0x0000000074B5C000-memory.dmp

            memory/2820-3-0x00000000051D0000-0x000000000526C000-memory.dmp

            memory/2820-8-0x00000000743A0000-0x0000000074B5C000-memory.dmp