Overview

overview

10

Static

static

DOC_ECS952...52.exe

windows7_x64

10

DOC_ECS952...52.exe

windows10_x64

10

Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10_x64
  • resource
    win10
  • submitted
    27/10/2020, 10:26

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General

  • Target
    DOC_ECS9522020102615040053_5778_952.exe
  • Size 840KB
  • Sample201027-wewmfjdwcs
  • SHA256 cb4567c5c6b82e5de38e47ac7047d3d7d072d3b235ff537090ee5d96fcf1e22b
  • MD5 SHA1 SHA512
Score
10/10
persistenceratremcos

Malware Config

Extracted

Family

  • remcos

C2

  • www.kesaihk.com:5004

Signatures

  • Remcos

    Remcos is a closed-source remote control and surveillance software.

    ratremcos
  • Uses the VBS compiler for execution 1 TTPs
  • Adds Run key to start application 2 TTPs 1 IoCs
    persistence
  • Suspicious use of SetThreadContext 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 16 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\DOC_ECS9522020102615040053_5778_952.exe
    "C:\Users\Admin\AppData\Local\Temp\DOC_ECS9522020102615040053_5778_952.exe"
    1⤵
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3864
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
      2⤵
        PID:2160
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
        "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
        2⤵
          PID:2348
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
          2⤵
          • Suspicious use of SetWindowsHookEx
          PID:2416

      Network

            MITRE ATT&CK Enterprise v6

            Replay Monitor

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            Downloads

            memory/2416-6-0x0000000000400000-0x0000000000421000-memory.dmp
            Download

            memory/2416-8-0x0000000000400000-0x0000000000421000-memory.dmp
            Download

            memory/3864-0-0x0000000073500000-0x0000000073BEE000-memory.dmp
            Download

            memory/3864-1-0x0000000000920000-0x0000000000921000-memory.dmp
            Download

            memory/3864-3-0x0000000005A50000-0x0000000005A51000-memory.dmp
            Download

            memory/3864-4-0x0000000005450000-0x0000000005468000-memory.dmp
            Download

            memory/3864-5-0x0000000002C50000-0x0000000002C5D000-memory.dmp
            Download