Overview

overview

10

Static

static

10

fe8f3a8519...93.exe

windows10-2004-x64

10

fe8f3a8519...93.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    15/07/2026, 08:40

Sharing

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General

  • Target
    fe8f3a85197a93ebf084176e6400a779f7caeb82d428a314e95914a2ef008f93.exe
  • Size 45KB
  • Sample260715-klbbtsbs8x
  • SHA256 fe8f3a85197a93ebf084176e6400a779f7caeb82d428a314e95914a2ef008f93
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 0.5.8

Botnet

  • Default

C2

  • s1.phimsexvn2.blog:80

  • s1.phimsexvn2.blog:22

  • s1.phimsexvn2.blog:8080

  • s1.phimsexvn2.blog:8880

  • s1.phimsexvn2.blog:2052

  • s1.phimsexvn2.blog:2082

  • s1.phimsexvn2.blog:2086

  • s1.phimsexvn2.blog:2095

  • s1.phimsexvn2.blog:443

  • s1.phimsexvn2.blog:2053

  • s1.phimsexvn2.blog:2083

  • s1.phimsexvn2.blog:2087

  • s1.phimsexvn2.blog:2096

  • s1.phimsexvn2.blog:8443

  • www.s1.phimsexvn2.blog:80

  • www.s1.phimsexvn2.blog:22

  • www.s1.phimsexvn2.blog:8080

  • www.s1.phimsexvn2.blog:8880

  • www.s1.phimsexvn2.blog:2052

  • www.s1.phimsexvn2.blog:2082

Mutex

  • UXgCuj4jWr4E

Attributes
  • delay

    0

  • install

    true

  • install_file

    d40rrx.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
  • 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).

  • 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\fe8f3a85197a93ebf084176e6400a779f7caeb82d428a314e95914a2ef008f93.exe
    "C:\Users\Admin\AppData\Local\Temp\fe8f3a85197a93ebf084176e6400a779f7caeb82d428a314e95914a2ef008f93.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4136
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "d40rrx" /tr '"C:\Users\Admin\AppData\Roaming\d40rrx.exe"' & exit
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:4728
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "d40rrx" /tr '"C:\Users\Admin\AppData\Roaming\d40rrx.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:3532
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp408E.tmp.bat""
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:688
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:4056
      • C:\Users\Admin\AppData\Roaming\d40rrx.exe
        "C:\Users\Admin\AppData\Roaming\d40rrx.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        PID:728
  • C:\Users\Admin\AppData\Roaming\d40rrx.exe
    "C:\Users\Admin\AppData\Roaming\d40rrx.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:2232

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        tmp408E.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp408E.tmp.bat
        • Size 150B
        • SHA256 5d09547e80c0921f878679b1367881ad4161e3de39872015a3ce4c98d7afee61
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        d40rrx.exe
        • Path C:\Users\Admin\AppData\Roaming\d40rrx.exe
        • Size 45KB
        • SHA256 fe8f3a85197a93ebf084176e6400a779f7caeb82d428a314e95914a2ef008f93
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/2232-10-0x0000000005210000-0x0000000005220000-memory.dmp
        Download

        memory/2232-13-0x0000000005210000-0x0000000005220000-memory.dmp
        Download

        memory/4136-0-0x0000000000F60000-0x0000000000F72000-memory.dmp
        Download

        memory/4136-1-0x00000000059D0000-0x00000000059E0000-memory.dmp
        Download

        memory/4136-2-0x0000000005920000-0x00000000059BC000-memory.dmp
        Download