Overview

overview

10

Static

static

10

main.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    CHECKER.rar

  • Size

    222KB

  • Sample

    241115-kty3vssakl

  • MD5

    413b25321c6bb2726e15d408a00c6e27

  • SHA1

    d24fd4e913d1a5cf943d257269bb45b7e281f4d6

  • SHA256

    a6d4e2706d45af6be3a6bd264ac95d7b5e6e60dbbcbce01a498dd3b8f9ccb3f6

  • SHA512

    eabc45a3a8e33f5e580402f5c46860d25c700d456571fa38a988fc9e4d85523414e8eaf1f0e63e6667e09da98c1a911f2ea3a231952a2717c6e78e51033e028a

  • SSDEEP

    6144:vo8nrHsLbJLVYPA5pyXt+oX0Mi88tUPnHCCFI6wRfT7q:vrnrHmbQPAvyX480j/aik6Fq

Score
10/10
remcosfluttercollectiondiscoveryevasionpersistencerattrojan

Malware Config

Extracted

Family

remcos

Botnet

Flutter

C2

85.17.107.2:8338

Attributes
  • audio_folder

    MicRecords

  • audio_path

    ApplicationPath

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    flutter.exe

  • copy_folder

    Flutter

  • delete_file

    true

  • hide_file

    true

  • hide_keylog_file

    true

  • install_flag

    true

  • install_path

    %WinDir%\System32

  • keylog_crypt

    true

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    Mot

  • mouse_option

    false

  • mutex

    Mot-P379YE

  • 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

      main.exe

    • Size

      483KB

    • MD5

      91589593e41eac9ac23f6f3de785b457

    • SHA1

      b3f926ba58dae1d0da8e099ba9d3f11ed5ab2a39

    • SHA256

      d91315352c0c49ae79df6219fb21c6fe11e405bc7ae117d9d111535ee1dd5467

    • SHA512

      c6b74d774fae5c9d7151afab78a1e4f96c6d089691123c8689136ae99ab9b21f128bd6565a122afbbd61cd919434df29bed2ee6439d1b9dc9eedd0ee0a0082cf

    • SSDEEP

      6144:25zY+w1LqZBCxKedv//NEUn+N5hkf/0TE7RvIZ/jbsAORZzAXMcrnmA4:25k+Yqaxrh3Nln+N52fIA4jbsvZztA4

    Score
    10/10
    remcosfluttercollectiondiscoveryevasionpersistencerattrojan

    • Remcos

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

      ratremcos

    • Remcos family

      remcos

    • Windows security bypass

      evasiontrojan

    • Detected Nirsoft tools

      Free utilities often used by attackers which can steal passwords, product keys, etc.

    • NirSoft MailPassView

      Password recovery tool for various email clients

    • NirSoft WebBrowserPassView

      Password recovery tool for various web browsers

    • Adds policy Run key to start application

      persistence

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Deletes itself

    • Executes dropped EXE

    • Accesses Microsoft Outlook accounts

      collection

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1

MITRE ATT&CK Enterprise v15

Tasks