Analysis

  • max time kernel
    151s
  • max time network
    132s
  • platform
    windows10_x64
  • resource
    win10v20201028
  • submitted
    09-11-2020 19:37

General

  • Target

    CONFIRMACION DEL PEDIDO CVE6535,PDF.exe

  • Size

    372KB

  • MD5

    a962399ee6a55b52ad2432702a800597

  • SHA1

    2ae09b6b627b86bb4a6e2e7b2d33fdc6f8e1579f

  • SHA256

    329886b8af71b45a41f94d0d9a69761b6b6fe80d36b7f7a6201fd97dc33234d5

  • SHA512

    7914d464cbba0de5392a19d9bd986be7246fca19d15cad5303cf81f1a9dd56cbf94729bd5d1f7f2b2b3e0cb545bb689cc6114b8ee08a8c508c4f8d1eeb86b8a6

Malware Config

Extracted

Family

remcos

C2

thankyoulord.ddns.net:5050

Signatures

  • CoreEntity .NET Packer 1 IoCs

    A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

  • Remcos

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

  • rezer0 1 IoCs

    Detects ReZer0, a packer with multiple versions used in various campaigns.

  • Uses the VBS compiler for execution 1 TTPs
  • Suspicious use of SetThreadContext 1 IoCs
  • 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 AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 13 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\CONFIRMACION DEL PEDIDO CVE6535,PDF.exe
    "C:\Users\Admin\AppData\Local\Temp\CONFIRMACION DEL PEDIDO CVE6535,PDF.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2432
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\CfGuVGvIV" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC058.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3948
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "{path}"
      2⤵
        PID:3124

    Network

    MITRE ATT&CK Matrix ATT&CK v6

    Execution

    Scripting

    1
    T1064

    Scheduled Task

    1
    T1053

    Persistence

    Scheduled Task

    1
    T1053

    Privilege Escalation

    Scheduled Task

    1
    T1053

    Defense Evasion

    Scripting

    1
    T1064

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\Users\Admin\AppData\Local\Temp\tmpC058.tmp
      MD5

      e3b3df55dbac304978868a58e602b677

      SHA1

      42ba13f72c8cba8665b9ebf43468b95a12358bed

      SHA256

      1c92fbfb17d3a5ad0a27e600b9137015a4e06f59571feea3f07bdd1f6e1566fe

      SHA512

      6a394c04557cbe460af948178454af43c4d31d8e8b0216f9778c9a0be3a9130e500fc7102b6aaaab9147d60bc4d78f5a48625c9923b2c10a05d7b55543c68a55

    • memory/2432-4-0x0000000007560000-0x0000000007561000-memory.dmp
      Filesize

      4KB

    • memory/2432-3-0x00000000079C0000-0x00000000079C1000-memory.dmp
      Filesize

      4KB

    • memory/2432-0-0x0000000073970000-0x000000007405E000-memory.dmp
      Filesize

      6.9MB

    • memory/2432-5-0x0000000007520000-0x0000000007521000-memory.dmp
      Filesize

      4KB

    • memory/2432-6-0x0000000002A80000-0x0000000002A83000-memory.dmp
      Filesize

      12KB

    • memory/2432-7-0x000000000A9B0000-0x000000000A9D7000-memory.dmp
      Filesize

      156KB

    • memory/2432-8-0x000000000AA80000-0x000000000AA81000-memory.dmp
      Filesize

      4KB

    • memory/2432-1-0x00000000007A0000-0x00000000007A1000-memory.dmp
      Filesize

      4KB

    • memory/3124-11-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB

    • memory/3124-12-0x0000000000413A84-mapping.dmp
    • memory/3124-13-0x0000000000400000-0x0000000000420000-memory.dmp
      Filesize

      128KB

    • memory/3948-9-0x0000000000000000-mapping.dmp