Overview

overview

10

Static

static

10

R2.exe

windows10-2004-x64

10

R2.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    60s
  • max time network
    59s
  • platform
    windows11-ltsc_2024_x64
  • resource
    win11ltsc2024-20260911-en
  • resource tags

    arch:x64arch:x86image:win11ltsc2024-20260911-enlocale:en-usos:windows11-ltsc_2024-x64systemwindows
  • submitted
    24/09/2026, 04:30

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General

  • Target
    R2.exe
  • Size 49KB
  • Sample260924-e42nvaea64
  • SHA256 0c6d6b9dd41b372b509a4a7f11dec5638aeb8f780776c6fe26463ce1c60bd05f
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
s8defense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • S8

C2

  • xoso6684.com:80

  • xoso6684.com:443

  • xoso6684.com:8080

  • www.xoso6684.com:80

  • www.xoso6684.com:443

  • www.xoso6684.com:8080

  • c2.xoso6684.com:80

  • c2.xoso6684.com:443

  • c2.xoso6684.com:8080

  • malware.xoso6684.com:80

  • malware.xoso6684.com:443

  • malware.xoso6684.com:8080

  • backdoor.xoso6684.com:80

  • backdoor.xoso6684.com:443

  • backdoor.xoso6684.com:8080

  • api.xoso6684.com:80

  • api.xoso6684.com:443

  • api.xoso6684.com:8080

Mutex

  • NyFzKCVMceTw

Attributes
  • delay

    3

  • install

    true

  • install_file

    S8.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • Family: AsyncRat

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

    ratasyncrat
  • Async RAT payload 1 IoCs
    rat
  • 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.

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

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

    persistenceexecution

Processes

  • C:\Users\Admin\AppData\Local\Temp\R2.exe
    "C:\Users\Admin\AppData\Local\Temp\R2.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    PID:4136
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "S8" /tr '"C:\Users\Admin\AppData\Roaming\S8.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      PID:6120
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "S8" /tr '"C:\Users\Admin\AppData\Roaming\S8.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:1972
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp9C46.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      PID:4508
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:5644
      • C:\Users\Admin\AppData\Roaming\S8.exe
        "C:\Users\Admin\AppData\Roaming\S8.exe"
        3⤵
          PID:4420
    • C:\Users\Admin\AppData\Roaming\S8.exe
      "C:\Users\Admin\AppData\Roaming\S8.exe"
      1⤵
        PID:4388

      Network

            MITRE ATT&CK Enterprise v16

            Replay Monitor

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            Downloads

            tmp9C46.tmp.bat
            • Path C:\Users\Admin\AppData\Local\Temp\tmp9C46.tmp.bat
            • Size 146B
            • SHA256 3ee07b7f4c7499e0f2228da33b2cdf1226e1f3b3b8ee55950881b81eb406abe6
            • MD5 SHA1 SHA512 TLSH
            Submit Download

            S8.exe
            • Path C:\Users\Admin\AppData\Roaming\S8.exe
            • Size 49KB
            • SHA256 0c6d6b9dd41b372b509a4a7f11dec5638aeb8f780776c6fe26463ce1c60bd05f
            • MD5 SHA1 SHA512 SSDEEP TLSH
            Submit Download

            memory/4136-0-0x0000000074652000-0x0000000074653000-memory.dmp
            Download

            memory/4136-1-0x0000000000420000-0x0000000000432000-memory.dmp
            Download

            memory/4136-2-0x0000000074640000-0x0000000074DFC000-memory.dmp
            Download

            memory/4136-3-0x0000000004E80000-0x0000000004F1C000-memory.dmp
            Download

            memory/4136-9-0x0000000074640000-0x0000000074DFC000-memory.dmp
            Download

            memory/4388-12-0x0000000074640000-0x0000000074DFC000-memory.dmp
            Download

            memory/4388-14-0x0000000074640000-0x0000000074DFC000-memory.dmp
            Download