Overview

overview

10

Static

static

3

21bca3ed38...da.exe

windows7-x64

7

21bca3ed38...da.exe

windows10-2004-x64

10

$PLUGINSDI...em.dll

windows7-x64

3

$PLUGINSDI...em.dll

windows10-2004-x64

3

$PLUGINSDI...ec.dll

windows7-x64

3

$PLUGINSDI...ec.dll

windows10-2004-x64

3

Sharing

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General

  • Target
    21bca3ed380aff98138bc26cc631cfaa7eedd098e3da694e8eef350b23afceda.exe
  • Size 609KB
  • Sample241010-bn3pestbpg
  • SHA256 21bca3ed380aff98138bc26cc631cfaa7eedd098e3da694e8eef350b23afceda
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
guloaderremcosremotehostdiscoverydownloaderrat

Malware Config

Extracted

Family

  • remcos

Botnet

  • RemoteHost

C2

  • kezdns.pro:2404

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    remcos.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-FUHBXG

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target
      21bca3ed380aff98138bc26cc631cfaa7eedd098e3da694e8eef350b23afceda.exe
    • Size 609KB
    • SHA256 21bca3ed380aff98138bc26cc631cfaa7eedd098e3da694e8eef350b23afceda
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    discoveryguloaderremcosremotehostdownloaderrat

    • Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Remcos

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

      ratremcos

    • Loads dropped DLL

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

    behavioral1behavioral2
    • Target
      $PLUGINSDIR/System.dll
    • Size 12KB
    • SHA256 c7a20bcaa0197aedddc8e4797bbb33fdf70d980f5e83c203d148121c2106d917
    • MD5 SHA1 SHA512 SSDEEP
    Score
    3/10
    discovery
    behavioral3behavioral4
    • Target
      $PLUGINSDIR/nsExec.dll
    • Size 6KB
    • SHA256 10675f13abaee592f14382349aa35d82fb52aab4e27eef61d0c83dec1f6b73da
    • MD5 SHA1 SHA512 SSDEEP
    Score
    3/10
    discovery
    behavioral5behavioral6

MITRE ATT&CK Enterprise v15

Tasks