Overview

overview

10

Static

static

10

J7FLH_KRMAL_SQR.exe

windows10-2004-x64

10

J7FLH_KRMAL_SQR.exe

windows11-21h2-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    147s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20260130-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20260130-enlocale:en-usos:windows10-2004-x64systemwindows
  • submitted
    19/04/2026, 09:21

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General

  • Target
    J7FLH_KRMAL_SQR.exe
  • Size 48KB
  • Sample260419-lbhtlaft6m
  • SHA256 47aed6e012b359573ad363daee75ef2f43e777ce379a743d522669b8a04f80ce
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
defaultdefense_evasionexecutionasyncratpersistencerat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 1.0.7

Botnet

  • Default

C2

  • 188.54.62.60:8848

  • 188.54.62.60:4782

Mutex

  • DcRatMutex_qwqdanchun

Attributes
  • delay

    1

  • install

    true

  • install_file

    SystemUpdate.exe

  • install_folder

    %AppData%

  • local_host

    127.0.0.1

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).

  • 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
  • Uses Task Scheduler COM API 1 TTPs

    The Task Scheduler COM API can be used to schedule applications to run on boot or at set times.

    persistence

Processes

  • C:\Users\Admin\AppData\Local\Temp\J7FLH_KRMAL_SQR.exe
    "C:\Users\Admin\AppData\Local\Temp\J7FLH_KRMAL_SQR.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4852
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "SystemUpdate" /tr '"C:\Users\Admin\AppData\Roaming\SystemUpdate.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5224
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "SystemUpdate" /tr '"C:\Users\Admin\AppData\Roaming\SystemUpdate.exe"'
        3⤵
        • Scheduled Task/Job: Scheduled Task
        PID:5768
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp24F8.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:5616
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:408
      • C:\Users\Admin\AppData\Roaming\SystemUpdate.exe
        "C:\Users\Admin\AppData\Roaming\SystemUpdate.exe"
        3⤵
        • Executes dropped EXE
        PID:3424
  • C:\Users\Admin\AppData\Roaming\SystemUpdate.exe
    "C:\Users\Admin\AppData\Roaming\SystemUpdate.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of AdjustPrivilegeToken
    PID:2384

Network

        MITRE ATT&CK Enterprise v16

        Replay Monitor

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        Downloads

        tmp24F8.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmp24F8.tmp.bat
        • Size 156B
        • SHA256 8d951ef90955631bd0c638dbd0dbb918124a0d5b9d1b22e8ba72d78dd3652089
        • MD5 SHA1 SHA512 TLSH
        Submit Download

        SystemUpdate.exe
        • Path C:\Users\Admin\AppData\Roaming\SystemUpdate.exe
        • Size 48KB
        • SHA256 47aed6e012b359573ad363daee75ef2f43e777ce379a743d522669b8a04f80ce
        • MD5 SHA1 SHA512 SSDEEP TLSH
        Submit Download

        memory/408-9-0x000001E779FA0000-0x000001E77A0CA000-memory.dmp
        Download

        memory/2384-12-0x00000000022E0000-0x000000000234B000-memory.dmp
        Download

        memory/4852-0-0x0000000000A80000-0x0000000000A92000-memory.dmp
        Download

        memory/4852-1-0x000000001B730000-0x000000001B740000-memory.dmp
        Download