Overview

overview

10

Static

static

10

b8f98c6bfa...28.exe

windows10-2004-x64

10

b8f98c6bfa...28.exe

windows11-ltsc_2024-x64

10

Analysis

  • max time kernel
    58s
  • max time network
    59s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260513-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260513-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    09/08/2026, 19:01

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General

  • Target
    b8f98c6bfaa58830febe05c4891e73c05c2832dac6dfc6606e62341b3d989f28.exe
  • Size 63KB
  • Sample260809-xpb4raxtcx
  • SHA256 b8f98c6bfaa58830febe05c4891e73c05c2832dac6dfc6606e62341b3d989f28
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
dcratdefense_evasiondiscoveryexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 1.0.7

Botnet

  • DcRat

Mutex

  • yuwdgywgbdg_2hdc7h

Attributes
  • delay

    1

  • install

    true

  • install_file

    DcRat Helper.exe

  • install_folder

    %Temp%

  • pastebin_config

    https://pastebin.com/raw/tqymu4XX

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
  • Contacts third-party web service commonly abused for C2 1 TTPs 2 IoCs

    Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

  • 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 5 IoCs
  • Suspicious use of WriteProcessMemory 5 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b8f98c6bfaa58830febe05c4891e73c05c2832dac6dfc6606e62341b3d989f28.exe
    "C:\Users\Admin\AppData\Local\Temp\b8f98c6bfaa58830febe05c4891e73c05c2832dac6dfc6606e62341b3d989f28.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:532
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "DcRat Helper" /tr '"C:\Users\Admin\AppData\Local\Temp\DcRat Helper.exe"' & exit
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3768
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "DcRat Helper" /tr '"C:\Users\Admin\AppData\Local\Temp\DcRat Helper.exe"'
        3⤵
        • System Location Discovery: System Language Discovery
        • Scheduled Task/Job: Scheduled Task
        PID:2468
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpBA3.tmp.bat""
      2⤵
      • Executes a command shell one-liner
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:3844
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • System Location Discovery: System Language Discovery
        • Delays execution with timeout.exe
        PID:4256
      • C:\Users\Admin\AppData\Local\Temp\DcRat Helper.exe
        "C:\Users\Admin\AppData\Local\Temp\DcRat Helper.exe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:1212
  • C:\Users\Admin\AppData\Local\Temp\DcRat Helper.exe
    "C:\Users\Admin\AppData\Local\Temp\DcRat Helper.exe"
    1⤵
    • Executes dropped EXE
    • System Location Discovery: System Language Discovery
    • Suspicious use of AdjustPrivilegeToken
    PID:1216

Network

        MITRE ATT&CK Enterprise v16

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        Downloads

        DcRat Helper.exe
        • Path C:\Users\Admin\AppData\Local\Temp\DcRat Helper.exe
        • Size 63KB
        • SHA256 b8f98c6bfaa58830febe05c4891e73c05c2832dac6dfc6606e62341b3d989f28
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        tmpBA3.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmpBA3.tmp.bat
        • Size 158B
        • SHA256 6f7099a0d08073eb4fc39a99e3b381cb82ad4efa2c920a4b0c5b4f4f8b0a1700
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        memory/532-0-0x0000000000FE0000-0x0000000000FF6000-memory.dmp
        Download

        memory/532-1-0x0000000005A30000-0x0000000005A40000-memory.dmp
        Download