Overview

overview

10

Static

static

10

Evon.exe

windows7-x64

10

Evon.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20230220-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20230220-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12/03/2023, 02:18

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General

  • Target
    Evon.exe
  • Size 52KB
  • Sample230312-crra8sed2w
  • SHA256 f425f5f3ba57958f3a79c9a3665d504d5dbb0e8bf2c657e67e929daf7f1b9cde
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
asyncratdefaultrat

Malware Config

Extracted

Family

  • asyncrat

Version

  • 1.0.7

Botnet

  • Default

C2

  • 127.0.0.1:8848

  • 127.0.0.1:33901

  • 127.0.0.1:33902

  • spring-consultation.at.ply.gg:8848

  • spring-consultation.at.ply.gg:33901

  • spring-consultation.at.ply.gg:33902

Mutex

  • DcRatMutex_qwqdanchun

Attributes
  • delay

    1

  • install

    true

  • install_file

    Evon.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

    ratasyncrat
  • Async RAT payload 3 IoCs
    rat
  • Checks computer location settings 2 TTPs 1 IoCs

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

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

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

    persistence
  • Delays execution with timeout.exe 1 IoCs
    evasion
  • Suspicious behavior: EnumeratesProcesses 64 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 10 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\Evon.exe
    "C:\Users\Admin\AppData\Local\Temp\Evon.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4900
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "Evon" /tr '"C:\Users\Admin\AppData\Roaming\Evon.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3856
      • C:\Windows\system32\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "Evon" /tr '"C:\Users\Admin\AppData\Roaming\Evon.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1932
    • C:\Windows\system32\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmpC1DE.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3508
      • C:\Windows\system32\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:4944
      • C:\Users\Admin\AppData\Roaming\Evon.exe
        "C:\Users\Admin\AppData\Roaming\Evon.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:3392

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        Evon.exe.log
        • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0\UsageLogs\Evon.exe.log
        • Size 425B
        • SHA256 b8f7e4ed81764db56b9c09050f68c5a26af78d8a5e2443e75e0e1aa7cd2ccd76
        • MD5 SHA1 SHA512
        Submit Download

        tmpC1DE.tmp.bat
        • Path C:\Users\Admin\AppData\Local\Temp\tmpC1DE.tmp.bat
        • Size 148B
        • SHA256 2cd0a60b14aed42a09c6480eb7ae97b1f7e6ad97f10fd384e3b81cd5b315d920
        • MD5 SHA1 SHA512
        Submit Download

        Evon.exe
        • Path C:\Users\Admin\AppData\Roaming\Evon.exe
        • Size 52KB
        • SHA256 f425f5f3ba57958f3a79c9a3665d504d5dbb0e8bf2c657e67e929daf7f1b9cde
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        Evon.exe
        • Path C:\Users\Admin\AppData\Roaming\Evon.exe
        • Size 52KB
        • SHA256 f425f5f3ba57958f3a79c9a3665d504d5dbb0e8bf2c657e67e929daf7f1b9cde
        • MD5 SHA1 SHA512 SSDEEP
        Submit Download

        memory/3392-144-0x0000000002810000-0x0000000002820000-memory.dmp
        Download

        memory/3392-145-0x0000000002810000-0x0000000002820000-memory.dmp
        Download

        memory/4900-133-0x00000000004B0000-0x00000000004C2000-memory.dmp
        Download

        memory/4900-134-0x000000001BE00000-0x000000001BE10000-memory.dmp
        Download