Analysis

  • max time kernel
    300s
  • max time network
    297s
  • platform
    windows10-1703_x64
  • resource
    win10-20240404-en
  • resource tags

    arch:x64arch:x86image:win10-20240404-enlocale:en-usos:windows10-1703-x64system
  • submitted
    25-07-2024 22:50

General

  • Target

    dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe

  • Size

    488KB

  • MD5

    675c946c7e255a38689fc35e17e8aa44

  • SHA1

    ea926cd51fbbd26a96c7273fabc2d1e5535b167b

  • SHA256

    dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779

  • SHA512

    93c2bae802f91878ea3b63b54dbf9c1f812cbcf667fc407095c5348612ec9137c361d5f3fd3d8a01d4b9a7f58b3c118f90e4bccfb95baa01f45f522dd287cae5

  • SSDEEP

    12288:HrMS+v6FgOijSlW8aAfTVl/8FrstNkN2dF0m775Qnqiv9:glmgPSlW8Vvcnqiv

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

127.0.0.1:52121

officerem.duckdns.org:52121

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-UNX1LL

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 7 IoCs

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

  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 3 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 4 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 12 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe
    "C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2448
    • C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe
      C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe /stext "C:\Users\Admin\AppData\Local\Temp\qftrwvxevkxpttwzswgbmy"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:3912
    • C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe
      C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe /stext "C:\Users\Admin\AppData\Local\Temp\azykxohfjspuehsdchtupdord"
      2⤵
      • Accesses Microsoft Outlook accounts
      • System Location Discovery: System Language Discovery
      PID:1460
    • C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe
      C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe /stext "C:\Users\Admin\AppData\Local\Temp\dbecxgszxahhgnghtsgwapjalria"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3048

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    e578a2cdeca4202f93234fd3b552756e

    SHA1

    335f9f0162688cc539bca9d23104c4aca8a8592f

    SHA256

    58075a9914a7ba1c79b5e872bdd8b4972a140a289d61f7995891093709cdcee7

    SHA512

    2523b468d3816184ea0bdcc79905aa72b43022d3c39df6956b3be559bcb42c380e6b707adf6ebea172cb26cc6f32841dd1088ce06cd8fbcf4e9771de59ff97c6

  • C:\Users\Admin\AppData\Local\Temp\qftrwvxevkxpttwzswgbmy

    Filesize

    4KB

    MD5

    aeb1356a0857995e1a148e8d8d75685f

    SHA1

    c1fd5f37ce9b0bc8ee2d0a4dc1be836287d42501

    SHA256

    a3a528a52dac30a3c0bc66975a4e9dc3afab2f0addc48a4ef1f1fa8d7d17d910

    SHA512

    5ee99d9262e4f024ba0cebb8732f1c81eaa5b4e40081da8aa8eb17697e73d04cc7af73a0bb1887fe8f3d903ba0079cdc66996561d281e53d16bee978fa33a0c2

  • memory/1460-17-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1460-20-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1460-25-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1460-30-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1460-23-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2448-50-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-60-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-12-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-11-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-14-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-104-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-9-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-8-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-94-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-93-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-83-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-7-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-82-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-72-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-2-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-71-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-61-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-5-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-10-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-6-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-37-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2448-40-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2448-41-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2448-42-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-46-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-49-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2448-0-0x0000000000590000-0x0000000000615000-memory.dmp

    Filesize

    532KB

  • memory/2448-1-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3048-22-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3048-29-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3048-28-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3912-35-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3912-21-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3912-27-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3912-26-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/3912-24-0x0000000000590000-0x0000000000615000-memory.dmp

    Filesize

    532KB

  • memory/3912-16-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB