Analysis

  • max time kernel
    76s
  • max time network
    113s
  • platform
    windows10_x64
  • resource
    win10v200722
  • submitted
    07/09/2020, 08:59

General

  • Target
    bc8704a90dfd3b1e4904da0af4b1b588.exe
  • Size 476KB
  • Sample200907-djq9plhamn
  • SHA256 9aaa435667bdb311821884dbb7bb6866fe8daa5a09edaf9d5c0d2856827edcfe
  • MD5 SHA1 SHA512
Score
7/10

Malware Config

Signatures

  • Loads dropped DLL 2 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.

  • JavaScript code in executable 1 IoCs
  • Looks up external IP address via web service 1 IoCs

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

  • Drops file in Windows directory 1 IoCs
  • Checks processor information in registry 2 TTPs 2 IoCs

    Processor information is often read in order to detect sandboxing environments.

  • Kills process with taskkill 1 IoCs
  • Modifies data under HKEY_USERS 5 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 6 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\bc8704a90dfd3b1e4904da0af4b1b588.exe
    "C:\Users\Admin\AppData\Local\Temp\bc8704a90dfd3b1e4904da0af4b1b588.exe"
    1⤵
    • Loads dropped DLL
    • Checks processor information in registry
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of WriteProcessMemory
    PID:508
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /c taskkill /im bc8704a90dfd3b1e4904da0af4b1b588.exe /f & erase C:\Users\Admin\AppData\Local\Temp\bc8704a90dfd3b1e4904da0af4b1b588.exe & exit
      2⤵
      • Suspicious use of WriteProcessMemory
      PID:3720
      • C:\Windows\SysWOW64\taskkill.exe
        taskkill /im bc8704a90dfd3b1e4904da0af4b1b588.exe /f
        3⤵
        • Kills process with taskkill
        • Suspicious use of AdjustPrivilegeToken
        PID:3980
  • C:\Windows\system32\svchost.exe
    C:\Windows\system32\svchost.exe -k LocalService -s WinHttpAutoProxySvc
    1⤵
    • Drops file in Windows directory
    • Modifies data under HKEY_USERS
    • Suspicious use of AdjustPrivilegeToken
    PID:612

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

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        Downloads

        memory/508-0-0x0000000000AA1000-0x0000000000AA2000-memory.dmp

        memory/508-1-0x0000000000C60000-0x0000000000C61000-memory.dmp