Analysis

  • max time kernel
    148s
  • max time network
    147s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    25/07/2024, 03:49

General

  • Target
    e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe
  • Size 1.0MB
  • Sample240725-edp75azdnd
  • SHA256 e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 103.186.116.90:67

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-U29DLE

  • 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 3 IoCs

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

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • 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 4 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • System Location Discovery: System Language Discovery 1 TTPs 7 IoCs

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

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 5 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe
    "C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2864
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\HYbWiJ.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2176
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\HYbWiJ" /XML "C:\Users\Admin\AppData\Local\Temp\tmpB3A6.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2764
    • C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe
      "C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:2660
      • C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe
        C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe /stext "C:\Users\Admin\AppData\Local\Temp\tbraywimfphgausbgyrdjevptyfrzhjss"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:3048
      • C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe
        C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe /stext "C:\Users\Admin\AppData\Local\Temp\eeesz"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:2080
      • C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe
        C:\Users\Admin\AppData\Local\Temp\e031d53424f8a015b4cf04ec035a7fa41c8f5eee4a88684d2a3a3d88399441f1.exe /stext "C:\Users\Admin\AppData\Local\Temp\oyjdzhdhh"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious use of AdjustPrivilegeToken
        PID:2872

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        tbraywimfphgausbgyrdjevptyfrzhjss

        • Path C:\Users\Admin\AppData\Local\Temp\tbraywimfphgausbgyrdjevptyfrzhjss
        • Size 2B
        • SHA256 b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209
        • MD5 SHA1 SHA512

        tmpB3A6.tmp

        • Path C:\Users\Admin\AppData\Local\Temp\tmpB3A6.tmp
        • Size 1KB
        • SHA256 7527e09f30a3a7a26e703a1de8f195157e743d25028ad8243cb5223507f99751
        • MD5 SHA1 SHA512

        memory/2080-50-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/2080-52-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/2080-49-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/2660-37-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-31-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        memory/2660-74-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-75-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-15-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-25-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-34-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-33-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-32-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-44-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-43-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-27-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-23-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-21-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-29-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-17-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-19-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-73-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-38-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-39-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-40-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-72-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-71-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-42-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-35-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-70-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-69-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-68-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-67-0x0000000000400000-0x0000000000482000-memory.dmp

        memory/2660-66-0x0000000010000000-0x0000000010019000-memory.dmp

        memory/2660-65-0x0000000010000000-0x0000000010019000-memory.dmp

        memory/2660-62-0x0000000010000000-0x0000000010019000-memory.dmp

        memory/2864-0-0x000000007418E000-0x000000007418F000-memory.dmp

        memory/2864-6-0x00000000004D0000-0x00000000004DE000-memory.dmp

        memory/2864-7-0x0000000005210000-0x00000000052D0000-memory.dmp

        memory/2864-1-0x0000000000D20000-0x0000000000E30000-memory.dmp

        memory/2864-5-0x00000000004B0000-0x00000000004BA000-memory.dmp

        memory/2864-2-0x0000000074180000-0x000000007486E000-memory.dmp

        memory/2864-36-0x0000000074180000-0x000000007486E000-memory.dmp

        memory/2864-3-0x0000000005130000-0x000000000520E000-memory.dmp

        memory/2864-4-0x00000000002A0000-0x00000000002B4000-memory.dmp

        memory/2872-56-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/2872-55-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/2872-54-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/2872-53-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

        memory/3048-46-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/3048-47-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/3048-51-0x0000000000400000-0x0000000000478000-memory.dmp