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Analysis

  • max time kernel
    150s
  • max time network
    115s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    10/07/2020, 15:24

General

  • Target

    OSE.exe

  • Size

    1022KB

  • MD5

    66883d9f96b49980f2faa93043d00c1d

  • SHA1

    6460aed133d60d8cf7a1cebc9eac08d9e0a635e2

  • SHA256

    0d3054972b35fa5c6f67ba30f1495823dda35917b171af358242c20293e2bbbb

  • SHA512

    7ce17d14d88da961f7d11531a60adf3ea4e8b6f4e08f76f73ca9a2af4986e7f4739a6407e790ee974325d3417f9459860a795d7f67a6c13412bcc0268d36530b

Malware Config

Signatures

  • Executes dropped EXE 3 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Drops startup file 1 IoCs
  • MassLogger log file 1 IoCs

    Detects a log file produced by MassLogger.

  • Reads user/profile data of web browsers 2 TTPs

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

  • Looks up external IP address via web service 1 IoCs

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

  • Suspicious use of WriteProcessMemory 14 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • MassLogger

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

  • NTFS ADS 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 2660 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

Processes

  • C:\Users\Admin\AppData\Local\Temp\OSE.exe
    "C:\Users\Admin\AppData\Local\Temp\OSE.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    • Suspicious behavior: EnumeratesProcesses
    PID:3788
    • C:\Windows\SysWOW64\notepad.exe
      "C:\Windows\system32\notepad.exe"
      2⤵
      • Drops startup file
      • Suspicious use of WriteProcessMemory
      • NTFS ADS
      PID:3892
      • C:\Users\Admin\AppData\Roaming\appdata\jskkd.exe
        "C:\Users\Admin\AppData\Roaming\appdata\jskkd.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of SetThreadContext
        PID:2548
        • C:\Users\Admin\AppData\Roaming\appdata\jskkd.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jskkd.exe"
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: AddClipboardFormatListener
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of SetWindowsHookEx
          PID:3840
        • C:\Users\Admin\AppData\Roaming\appdata\jskkd.exe
          "C:\Users\Admin\AppData\Roaming\appdata\jskkd.exe" 2 3840 53125
          4⤵
          • Executes dropped EXE
          • Suspicious behavior: EnumeratesProcesses
          PID:3872

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

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Downloads

  • memory/3840-8-0x0000000000400000-0x0000000000541000-memory.dmp

    Filesize

    1.3MB

  • memory/3840-9-0x0000000000400000-0x0000000000541000-memory.dmp

    Filesize

    1.3MB

  • memory/3840-4-0x0000000000400000-0x0000000000541000-memory.dmp

    Filesize

    1.3MB

  • memory/3840-11-0x0000000002330000-0x00000000023CA000-memory.dmp

    Filesize

    616KB

  • memory/3840-12-0x0000000002322000-0x0000000002323000-memory.dmp

    Filesize

    4KB