Analysis

  • max time kernel
    147s
  • max time network
    155s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25-05-2024 13:52

General

  • Target

    start.exe

  • Size

    63KB

  • MD5

    c1ade258f05c512e98ebc4d9d1165f8a

  • SHA1

    acf20f6a7dc7841ae06f801b887289fdc99e0488

  • SHA256

    447eae52ab1979405497866c72df7ec0703085ad6946ab0127f612b1518f8759

  • SHA512

    5b652e0ef6293d7baeb7e9d8b79322ec65e98d748e1df492099fa6692d0bbc78f032df68e7028a28af06b5c27394456159351a6469fdaf777e6eb98609331076

  • SSDEEP

    1536:SaKFoNbEkySYKumUYFOy5biAPY0JG4aRjnl7RUr+TG5x:SawoNbEkAKumUYFD5biF0JejxSsCx

Malware Config

Extracted

Family

asyncrat

Version

| Edit 3LOSH RAT

Botnet

Exodus_Market

C2

leetboy.dynuddns.net:1339

Mutex

AsyncMutex_6SI8OkPnk

Attributes
  • delay

    3

  • install

    true

  • install_file

    svchos.exe

  • install_folder

    %AppData%

aes.plain

Signatures

  • AsyncRat

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

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

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

  • Executes dropped EXE 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 22 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\start.exe
    "C:\Users\Admin\AppData\Local\Temp\start.exe"
    1⤵
    • Checks computer location settings
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:4720
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c schtasks /create /f /sc onlogon /rl highest /tn "svchos" /tr '"C:\Users\Admin\AppData\Roaming\svchos.exe"' & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1380
      • C:\Windows\SysWOW64\schtasks.exe
        schtasks /create /f /sc onlogon /rl highest /tn "svchos" /tr '"C:\Users\Admin\AppData\Roaming\svchos.exe"'
        3⤵
        • Creates scheduled task(s)
        PID:1408
    • C:\Windows\SysWOW64\cmd.exe
      C:\Windows\system32\cmd.exe /c ""C:\Users\Admin\AppData\Local\Temp\tmp5CB6.tmp.bat""
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:4000
      • C:\Windows\SysWOW64\timeout.exe
        timeout 3
        3⤵
        • Delays execution with timeout.exe
        PID:2060
      • C:\Users\Admin\AppData\Roaming\svchos.exe
        "C:\Users\Admin\AppData\Roaming\svchos.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of SetWindowsHookEx
        PID:3016

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\tmp5CB6.tmp.bat

    Filesize

    150B

    MD5

    712a5eac516d3a1dcd94a3a7ef1a1ada

    SHA1

    b1e43d3dba3e40896a7bfa61baf1b0f2890725fc

    SHA256

    c7094e9abc0e0539be3bc5b3ba61a0e1d99b4a29f62b43128f79b1f63bb8b510

    SHA512

    f007259420057b9f8db6a8e2b4383d656a691b41e7b6cd51f68b439c9adbadc92675f19a8e215431f4ccef93a8276ac8d09c6cb3740643345017e8235c1d7343

  • C:\Users\Admin\AppData\Roaming\svchos.exe

    Filesize

    63KB

    MD5

    c1ade258f05c512e98ebc4d9d1165f8a

    SHA1

    acf20f6a7dc7841ae06f801b887289fdc99e0488

    SHA256

    447eae52ab1979405497866c72df7ec0703085ad6946ab0127f612b1518f8759

    SHA512

    5b652e0ef6293d7baeb7e9d8b79322ec65e98d748e1df492099fa6692d0bbc78f032df68e7028a28af06b5c27394456159351a6469fdaf777e6eb98609331076

  • memory/3016-15-0x00000000057E0000-0x0000000005D84000-memory.dmp

    Filesize

    5.6MB

  • memory/3016-13-0x0000000074500000-0x0000000074CB0000-memory.dmp

    Filesize

    7.7MB

  • memory/3016-14-0x0000000074500000-0x0000000074CB0000-memory.dmp

    Filesize

    7.7MB

  • memory/3016-16-0x00000000053D0000-0x0000000005462000-memory.dmp

    Filesize

    584KB

  • memory/3016-17-0x0000000005390000-0x000000000539A000-memory.dmp

    Filesize

    40KB

  • memory/3016-20-0x0000000006500000-0x0000000006566000-memory.dmp

    Filesize

    408KB

  • memory/3016-21-0x0000000074500000-0x0000000074CB0000-memory.dmp

    Filesize

    7.7MB

  • memory/3016-22-0x0000000074500000-0x0000000074CB0000-memory.dmp

    Filesize

    7.7MB

  • memory/4720-3-0x00000000054C0000-0x000000000555C000-memory.dmp

    Filesize

    624KB

  • memory/4720-8-0x00000000745A0000-0x0000000074D50000-memory.dmp

    Filesize

    7.7MB

  • memory/4720-2-0x00000000745A0000-0x0000000074D50000-memory.dmp

    Filesize

    7.7MB

  • memory/4720-1-0x0000000000A50000-0x0000000000A66000-memory.dmp

    Filesize

    88KB

  • memory/4720-0-0x00000000745AE000-0x00000000745AF000-memory.dmp

    Filesize

    4KB