Overview

overview

10

Static

static

3

97e7c70270...ca.exe

windows10-2004-x64

10

97e7c70270...ca.exe

windows11-ltsc_2024-x64

10

$PLUGINSDI...em.dll

windows10-2004-x64

3

$PLUGINSDI...em.dll

windows11-ltsc_2024-x64

3

Sharing

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General

  • Target
    97e7c70270a2522d212ad556382d97477dba6730dccd421230a9f36cb97aa9ca.exe
  • Size 457KB
  • Sample260810-rcjp6sgf62
  • SHA256 97e7c70270a2522d212ad556382d97477dba6730dccd421230a9f36cb97aa9ca
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
guloaderremcossendersdiscoverydownloaderpersistenceratsuricata

Malware Config

Extracted

Family

  • remcos

Version

  • 7.2.5 Pro

Botnet

  • Senders

C2

  • brajasas35safael1.duckdns.org:1771

  • brajasas35safael2.duckdns.org:1771

  • brajasas35safael3.duckdns.org:1771

  • brajasas35safael4.duckdns.org:1771

  • brajasas35safael5.duckdns.org:1771

  • brajasas35safael6.duckdns.org:1771

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • 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

    true

  • install_flag

    false

  • keylog_crypt

    false

  • keylog_file

    huopges.dat

  • keylog_flag

    false

  • keylog_path

    %AppData%

  • mouse_option

    false

  • mutex

    hjmiguowql-XH07PX

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Targets

    • Target
      97e7c70270a2522d212ad556382d97477dba6730dccd421230a9f36cb97aa9ca.exe
    • Size 457KB
    • SHA256 97e7c70270a2522d212ad556382d97477dba6730dccd421230a9f36cb97aa9ca
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    10/10
    sendersdiscoverydownloaderguloaderremcospersistenceratsuricata

    • Family: Guloader,Cloudeye

      A shellcode based downloader first seen in 2020.

      downloaderguloader

    • Family: Remcos

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

      ratremcos

    • Suricata alert: REMCOS RAT Malware Inbound C2 Communication

      Network activity triggered a Suricata alert

      suricataremcos

    • Suricata alert: REMCOS RAT Malware Outbound C2 Communication

      Network activity triggered a Suricata alert

      suricataremcos

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Contacts third-party web service commonly abused for C2

      Legitimate web (hosting) services can be abused by malware authors to host malware or C2s.

    • Drops file in System32 directory

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1behavioral2
    • Target
      $PLUGINSDIR/System.dll
    • Size 12KB
    • SHA256 23d618a0293c78ce00f7c6e6dd8b8923621da7dd1f63a070163ef4c0ec3033d6
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    3/10
    discovery
    behavioral3behavioral4

MITRE ATT&CK Enterprise v16

Tasks