Analysis

  • max time kernel
    89s
  • max time network
    91s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    25/09/2021, 17:46

General

  • Target
    82729b46754db1f3eb73be457bdcc42c.exe
  • Size 434KB
  • Sample210925-wcbf1sdfh2
  • SHA256 3e929304dd13990cc2fdb0673a8eac7387fac96052f76f9fd432c3fc7f04fd1d
  • 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\82729b46754db1f3eb73be457bdcc42c.exe
    "C:\Users\Admin\AppData\Local\Temp\82729b46754db1f3eb73be457bdcc42c.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:4016
    • C:\Users\Admin\AppData\Local\Temp\zzYemT1YAL.exe
      "C:\Users\Admin\AppData\Local\Temp\zzYemT1YAL.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:60
      • 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:816
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\82729b46754db1f3eb73be457bdcc42c.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:64
      • C:\Windows\SysWOW64\timeout.exe
        timeout /T 10 /NOBREAK
        3⤵
        • Delays execution with timeout.exe
        PID:644
  • 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:2220
    • 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:2388

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/60-128-0x00000000001D0000-0x00000000001D4000-memory.dmp

        memory/60-129-0x0000000000400000-0x00000000004A9000-memory.dmp

        memory/2220-133-0x0000000000400000-0x00000000004A9000-memory.dmp

        memory/4016-114-0x0000000002230000-0x00000000022C0000-memory.dmp

        memory/4016-115-0x0000000000400000-0x00000000004F3000-memory.dmp