Overview

overview

10

Static

static

10

b551ff06fa...17.exe

windows10-2004-x64

10

b551ff06fa...17.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    22/07/2026, 18:43

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General

  • Target
    b551ff06fa3154206d59b8c20b2103a6632bc607fdc089571511dbd7374f1e17.exe
  • Size 45KB
  • Sample260722-xdds7ssdkb
  • SHA256 b551ff06fa3154206d59b8c20b2103a6632bc607fdc089571511dbd7374f1e17
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • sex18.tech:80

  • sex18.tech:22

  • sex18.tech:8080

  • sex18.tech:8880

  • sex18.tech:2052

  • sex18.tech:2082

  • sex18.tech:2086

  • sex18.tech:2095

  • sex18.tech:443

  • sex18.tech:2053

  • sex18.tech:2083

  • sex18.tech:2087

  • sex18.tech:2096

  • sex18.tech:8443

  • www.sex18.tech:80

  • www.sex18.tech:22

  • www.sex18.tech:8080

  • www.sex18.tech:8880

  • www.sex18.tech:2052

  • www.sex18.tech:2082

Mutex

  • Fi1pHzrMbAKv

Attributes
  • delay

    0

  • install

    true

  • install_file

    efwvn.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 2 IoCs
    rat
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • Executes dropped EXE 2 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • 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 7 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
  • Suspicious behavior: EnumeratesProcesses 23 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b551ff06fa3154206d59b8c20b2103a6632bc607fdc089571511dbd7374f1e17.exe
    "C:\Users\Admin\AppData\Local\Temp\b551ff06fa3154206d59b8c20b2103a6632bc607fdc089571511dbd7374f1e17.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3324
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "efwvn" /tr '"C:\Users\Admin\AppData\Roaming\efwvn.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2800
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "efwvn" /tr '"C:\Users\Admin\AppData\Roaming\efwvn.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2888
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp47F.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:5056
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:5028
      • C:\Users\Admin\AppData\Roaming\efwvn.exe
        "C:\Users\Admin\AppData\Roaming\efwvn.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:1480
  • C:\Users\Admin\AppData\Roaming\efwvn.exe
    "C:\Users\Admin\AppData\Roaming\efwvn.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:1140

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmp47F.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp47F.tmp.bat
        • Size 148B
        • SHA256 8c81c2fc370fb03f6ff5db9d60b90cdc42f63f4f229474850fbd9a751a8122b7
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        efwvn.exe
        • Path C:\Users\Admin\AppData\Roaming\efwvn.exe
        • Size 45KB
        • SHA256 b551ff06fa3154206d59b8c20b2103a6632bc607fdc089571511dbd7374f1e17
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/1140-10-0x0000000005840000-0x0000000005850000-memory.dmp
        Download

        memory/1140-13-0x0000000005840000-0x0000000005850000-memory.dmp
        Download

        memory/3324-0-0x00000000002A0000-0x00000000002B2000-memory.dmp
        Download

        memory/3324-1-0x0000000004CA0000-0x0000000004CB0000-memory.dmp
        Download

        memory/3324-2-0x0000000004CB0000-0x0000000004D4C000-memory.dmp
        Download