Analysis

  • max time kernel
    119s
  • max time network
    122s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    30/09/2021, 20:06

General

  • Target
    8a45a0077a84d7b42e5dfaaf5fc975ac.exe
  • Size 494KB
  • Sample210930-yvd1zaade4
  • SHA256 18c798282da89986a2aeaf8b9d85e4f3d70e991dc5186937f40e6802be3da549
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • raccoon

Botnet
  • f6d7183c9e82d2a9b81e6c0608450aa66cefb51f

Attributes
  • url4cnc

    https://t.me/justoprostohello

rc4.plain
rc4.plain

Signatures

  • Raccoon

    Simple but powerful infostealer which was very active in 2019.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 6 IoCs
  • Reads user/profile data of local email clients 2 TTPs

    Email clients store some user data on disk where infostealers will often target it.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 2 IoCs

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

  • Delays execution with timeout.exe 1 IoCs
  • Suspicious use of WriteProcessMemory 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8a45a0077a84d7b42e5dfaaf5fc975ac.exe
    "C:\Users\Admin\AppData\Local\Temp\8a45a0077a84d7b42e5dfaaf5fc975ac.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1588
    • C:\Users\Admin\AppData\Local\Temp\QA0DRtkmQw.exe
      "C:\Users\Admin\AppData\Local\Temp\QA0DRtkmQw.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:2648
      • C:\Windows\SysWOW64\schtasks.exe
        /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe"
        3⤵
        • Creates scheduled task(s)
        PID:496
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\8a45a0077a84d7b42e5dfaaf5fc975ac.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:1768
      • C:\Windows\SysWOW64\timeout.exe
        timeout /T 10 /NOBREAK
        3⤵
        • Delays execution with timeout.exe
        PID:3376
  • C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe
    C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe
    1⤵
    • Executes dropped EXE
    • Suspicious use of WriteProcessMemory
    PID:864
    • C:\Windows\SysWOW64\schtasks.exe
      /C /create /F /sc minute /mo 1 /tn "Azure-Update-Task" /tr "C:\Users\Admin\AppData\Roaming\Microsoft\Network\sihost.exe"
      2⤵
      • Creates scheduled task(s)
      PID:812

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/864-134-0x0000000000400000-0x000000000086B000-memory.dmp

        memory/1588-115-0x0000000000BA0000-0x0000000000C30000-memory.dmp

        memory/1588-116-0x0000000000400000-0x00000000008AB000-memory.dmp

        memory/2648-129-0x0000000000400000-0x000000000086B000-memory.dmp

        memory/2648-128-0x0000000000030000-0x0000000000034000-memory.dmp