Analysis

  • max time kernel
    298s
  • max time network
    293s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-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 10 IoCs

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

  • NirSoft MailPassView 4 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 2 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 15 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:1756
    • C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe
      C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe /stext "C:\Users\Admin\AppData\Local\Temp\mubwlvpwardcxyegtbliqlobsopdfq"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      PID:2888
    • C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe
      C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe /stext "C:\Users\Admin\AppData\Local\Temp\oogheoaqozvhhmskcmxktyjsbvzeyausv"
      2⤵
      • Accesses Microsoft Outlook accounts
      • System Location Discovery: System Language Discovery
      PID:2736
    • C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe
      C:\Users\Admin\AppData\Local\Temp\dc27a217b51c8b86cc41029dd69e1ced493682bb8721065d25f232d188015779.exe /stext "C:\Users\Admin\AppData\Local\Temp\zqlzf"
      2⤵
      • System Location Discovery: System Language Discovery
      • Suspicious use of AdjustPrivilegeToken
      PID:2340

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    53ff268d85c1339c2ee38eb1adf8dd43

    SHA1

    9a174bf27f4d8d0c0061e2e659874dcf901edf05

    SHA256

    c734a0bbf42c6e3d905c99499e11d3e1ed6c240e977cd20aace16ac39b2c9cc2

    SHA512

    94b3992579573724a06e84bb154a325bfd4dee9467dbf180b168c7ec05c63dcb4f73863dd4f08b84abe3088588c1dff92037cd7fc1658459ed99b0574f472da3

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • memory/1756-31-0x0000000003E20000-0x0000000003EA5000-memory.dmp

    Filesize

    532KB

  • memory/1756-11-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-2-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-102-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-8-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-9-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-10-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-28-0x0000000003DB0000-0x0000000003E35000-memory.dmp

    Filesize

    532KB

  • memory/1756-12-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-14-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-125-0x0000000003E20000-0x0000000003EA5000-memory.dmp

    Filesize

    532KB

  • memory/1756-124-0x0000000003DB0000-0x0000000003E35000-memory.dmp

    Filesize

    532KB

  • memory/1756-121-0x0000000003D30000-0x0000000003DB5000-memory.dmp

    Filesize

    532KB

  • memory/1756-27-0x0000000003D30000-0x0000000003DB5000-memory.dmp

    Filesize

    532KB

  • memory/1756-54-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1756-103-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-7-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-5-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-113-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-92-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-91-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-81-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-80-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-69-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-1-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-6-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-59-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-58-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-56-0x0000000000220000-0x00000000002A2000-memory.dmp

    Filesize

    520KB

  • memory/1756-0-0x0000000000590000-0x0000000000615000-memory.dmp

    Filesize

    532KB

  • memory/1756-49-0x0000000000590000-0x0000000000615000-memory.dmp

    Filesize

    532KB

  • memory/1756-55-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/1756-51-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/2340-39-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2340-38-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2340-41-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2340-35-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2340-37-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2736-32-0x0000000000590000-0x0000000000615000-memory.dmp

    Filesize

    532KB

  • memory/2736-40-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2736-24-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2736-26-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2736-30-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2736-50-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2888-46-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2888-25-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2888-29-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2888-20-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/2888-16-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2888-19-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB