Analysis

  • max time kernel
    98s
  • max time network
    139s
  • platform
    windows7_x64
  • resource
    win7v200430
  • submitted
    14/07/2020, 13:36

General

  • Target

    GSYJrJhEUVbUoZN.exe

  • Size

    1003KB

  • MD5

    a25c4a2a838811521034e121d502ed72

  • SHA1

    5d81483df22eb8ad3b6b8198b63853f70f6d798b

  • SHA256

    7fb6e9a788b18806469167cf64458dd590122593a04489cf70bb70434905a246

  • SHA512

    889fbd8be7dda4d1dc69a498a96178b9992fb637460aaa54417b20a56cd9ab39c37f041e2c1997b873049fd157a6cd6edbf77be7a444076a5c803fd77b8d26b4

Malware Config

Signatures

  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Reads user/profile data of web browsers 2 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

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

  • Suspicious use of WriteProcessMemory 13 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • MassLogger

    Masslogger is a .NET stealer targeting passwords from browsers, email and cryptocurrency clients.

Processes

  • C:\Users\Admin\AppData\Local\Temp\GSYJrJhEUVbUoZN.exe
    "C:\Users\Admin\AppData\Local\Temp\GSYJrJhEUVbUoZN.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    • Suspicious use of SetThreadContext
    PID:1296
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\ATkXpfNGZeziic" /XML "C:\Users\Admin\AppData\Local\Temp\tmpA1F9.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1804
    • C:\Users\Admin\AppData\Local\Temp\GSYJrJhEUVbUoZN.exe
      "{path}"
      2⤵
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of SetWindowsHookEx
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: AddClipboardFormatListener
      PID:1772

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        • memory/1772-4-0x0000000000400000-0x000000000049A000-memory.dmp

          Filesize

          616KB

        • memory/1772-6-0x0000000000400000-0x000000000049A000-memory.dmp

          Filesize

          616KB

        • memory/1772-7-0x0000000000400000-0x000000000049A000-memory.dmp

          Filesize

          616KB