Analysis

  • max time kernel
    58s
  • max time network
    120s
  • platform
    windows10_x64
  • resource
    win10v20210408
  • submitted
    13/09/2021, 15:22

General

  • Target
    3379c53e0974e8be9749f56b2c583b34.exe
  • Size 472KB
  • Sample210913-srwtqaeab5
  • SHA256 88bea616209dfb7515186c71ef3555315eae375e4bf1fdff5267aea751323ae6
  • 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 15 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3379c53e0974e8be9749f56b2c583b34.exe
    "C:\Users\Admin\AppData\Local\Temp\3379c53e0974e8be9749f56b2c583b34.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:3728
    • C:\Users\Admin\AppData\Local\Temp\YZ2Z8aHgfI.exe
      "C:\Users\Admin\AppData\Local\Temp\YZ2Z8aHgfI.exe"
      2⤵
      • Executes dropped EXE
      • Suspicious use of WriteProcessMemory
      PID:3636
      • 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:812
    • C:\Windows\SysWOW64\cmd.exe
      cmd.exe /C timeout /T 10 /NOBREAK > Nul & Del /f /q "C:\Users\Admin\AppData\Local\Temp\3379c53e0974e8be9749f56b2c583b34.exe"
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3700
      • C:\Windows\SysWOW64\timeout.exe
        timeout /T 10 /NOBREAK
        3⤵
        • Delays execution with timeout.exe
        PID:652
  • 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:3768
    • 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:2712

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/3636-127-0x00000000021A0000-0x00000000021A4000-memory.dmp

        memory/3636-128-0x0000000000400000-0x000000000214B000-memory.dmp

        memory/3728-114-0x0000000003DF0000-0x0000000003E80000-memory.dmp

        memory/3728-115-0x0000000000400000-0x0000000002194000-memory.dmp

        memory/3768-132-0x0000000000400000-0x000000000214B000-memory.dmp