Analysis

  • max time kernel
    17s
  • max time network
    17s
  • platform
    windows7_x64
  • resource
    win7v200722
  • submitted
    22/10/2020, 06:36

General

  • Target
    1x40,MC, 910159447-MIRAI Signed.pdf.exe
  • Size 403KB
  • Sample201022-c8tr3eer2s
  • SHA256 fa5850a0ba8809631d4e3f5a3f8cafa133b3d6ae37088eeb934ec13d1bc9f368
  • MD5 SHA1 SHA512
Score
10/10

Malware Config

Extracted

Family
  • remcos

C2
  • petroleum.sytes.net:3014

Signatures

  • Remcos

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

  • Drops startup file 1 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 17 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1x40,MC, 910159447-MIRAI Signed.pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\1x40,MC, 910159447-MIRAI Signed.pdf.exe"
    1⤵
    • Drops startup file
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:836
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious use of WriteProcessMemory
      PID:1684
      • C:\Program Files (x86)\Internet Explorer\iexplore.exe
        "C:\Program Files (x86)\Internet Explorer\iexplore.exe"
        3⤵
          PID:1548

    Network

          MITRE ATT&CK Matrix

          Replay Monitor

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          Downloads

          memory/836-0-0x0000000074E00000-0x00000000754EE000-memory.dmp

          memory/836-1-0x0000000000820000-0x0000000000821000-memory.dmp

          memory/836-3-0x0000000002060000-0x0000000002088000-memory.dmp

          memory/1548-8-0x0000000000400000-0x0000000000412000-memory.dmp

          memory/1548-10-0x0000000000400000-0x0000000000412000-memory.dmp

          memory/1548-11-0x0000000000400000-0x0000000000412000-memory.dmp

          memory/1684-5-0x0000000000400000-0x0000000000421000-memory.dmp

          memory/1684-7-0x0000000000400000-0x0000000000421000-memory.dmp