Analysis

  • max time kernel
    35s
  • max time network
    114s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    09/09/2021, 15:49

General

  • Target
    0059bcf133667393827a8dc6381f2516.exe
  • Size 533KB
  • Sample210909-s9b72abegj
  • SHA256 7ac7316234cbc2894267e99ceca5574f892cb2e49b66cfb2611d73388f0994b3
  • MD5 SHA1 SHA512

Malware Config

Signatures

  • Raccoon

    Simple but powerful infostealer which was very active in 2019.

  • Downloads MZ/PE file
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 5 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 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0059bcf133667393827a8dc6381f2516.exe
    "C:\Users\Admin\AppData\Local\Temp\0059bcf133667393827a8dc6381f2516.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:4000
    • C:\Users\Admin\AppData\Local\Temp\msIA6jVkrp.exe
      "C:\Users\Admin\AppData\Local\Temp\msIA6jVkrp.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:1600
      • 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:1820
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\0059bcf133667393827a8dc6381f2516.exe"
      2⤵
        PID:3348
        • C:\Windows\SysWOW64\timeout.exe
          timeout /T 10 /NOBREAK
          3⤵
          • Delays execution with timeout.exe
          PID:1676
    • 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:3916
      • 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:2164

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

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          Downloads

          memory/1600-127-0x0000000000400000-0x0000000002B5B000-memory.dmp

          memory/1600-126-0x00000000001D0000-0x00000000001D4000-memory.dmp

          memory/3916-131-0x0000000000400000-0x0000000002B5B000-memory.dmp

          memory/4000-114-0x0000000004920000-0x00000000049B0000-memory.dmp

          memory/4000-115-0x0000000000400000-0x0000000002B91000-memory.dmp