Analysis

  • max time kernel
    149s
  • max time network
    144s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    27-11-2024 12:11

General

  • Target

    RFQ-00948-STELLION-878378.exe

  • Size

    1.1MB

  • MD5

    7d78937ebc3648958437741df13eec52

  • SHA1

    9b30169d5adb06c082d6b9e297368faad45725f5

  • SHA256

    ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

  • SHA512

    7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4

  • SSDEEP

    24576:PYoOciJwQYaoRuivChV3DSwctuoqBMY9zVZEueHTf:PsbwQIRssqBMWVZEu

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

206.189.218.238:4782

206.189.218.238:2286

206.189.218.238:3363

206.189.218.238:3386

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

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-NJK093

  • screenshot_crypt

    false

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Remcos family
  • 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 2 IoCs

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

  • Executes dropped EXE 5 IoCs
  • Loads dropped DLL 1 IoCs
  • Reads user/profile data of web browsers 3 TTPs

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

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 4 IoCs
  • Suspicious use of SetThreadContext 5 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 11 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 2 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 61 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2352
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2688
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp2E51.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2564
    • C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe
      "C:\Users\Admin\AppData\Local\Temp\RFQ-00948-STELLION-878378.exe"
      2⤵
      • Loads dropped DLL
      • Adds Run key to start application
      • System Location Discovery: System Language Discovery
      • Suspicious use of WriteProcessMemory
      PID:2596
      • C:\ProgramData\Remcos\remcos.exe
        "C:\ProgramData\Remcos\remcos.exe"
        3⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:2140
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\QgjhVvUyb.exe"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1836
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp7EC1.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:1536
        • C:\ProgramData\Remcos\remcos.exe
          "C:\ProgramData\Remcos\remcos.exe"
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:776
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\whanluhjblivkjogztqrwarpjhvvaazmg"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:1288
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\hcfxen"
            5⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:1784
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\jetqffcfk"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:2024

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    0f16d2a4b35cc5bc8f1e97491eb9d81b

    SHA1

    7696ee614ef2f5af733a6f745d54552734806b07

    SHA256

    ac1975b3cd8dbe03b3d1900ee268b11d4433f976cac05567ccc749f370b948de

    SHA512

    1c2234fc2207a06b9759155cc13d2882b36fe94f6c085e6f8c9374a156e79faceffee4dcbc117cf0d0ab3a65cb0d8d8416388e7e98aa7eab54c90641e0d0af73

  • C:\ProgramData\Remcos\remcos.exe

    Filesize

    1.1MB

    MD5

    7d78937ebc3648958437741df13eec52

    SHA1

    9b30169d5adb06c082d6b9e297368faad45725f5

    SHA256

    ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

    SHA512

    7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4

  • C:\Users\Admin\AppData\Local\Temp\tmp2E51.tmp

    Filesize

    1KB

    MD5

    13599b98e31d23c963633040cedd21c6

    SHA1

    5fe57c0c7822d05fefa88c4805009a7cb669c9a0

    SHA256

    f22536e7baf7fe0eab45db4714353e9136f2626f81c5459028fd83c45f186132

    SHA512

    b9370d6732a196ab997be4c0153657644645001ab779e9bcc771ef239c6906a938f22ccd458e6c9ec6df12c3057d1d8f8a9b1d5239c2d4e59a2fa0e307b99d88

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

    Filesize

    2B

    MD5

    f3b25701fe362ec84616a93a45ce9998

    SHA1

    d62636d8caec13f04e28442a0a6fa1afeb024bbb

    SHA256

    b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

    SHA512

    98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

  • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\d93f411851d7c929.customDestinations-ms

    Filesize

    7KB

    MD5

    e615bcfdfbd69844fa339140e332a6de

    SHA1

    ee4e93d97e2aefd7cd09d7c137c67d677b543567

    SHA256

    c7fe1a438c839f1c69746a2ab5f2d8f3ba56ff888f3fa0da62ddb8db72cbbfc2

    SHA512

    99f5a7f43bccc2ad21f123c3c45ebfba8e79f31bd68b2f5059041b7f2d01d1bbef2464fc0d8da03a5dfc532c3477ffd0d4eaac3d6466dfdc8e861b321fc7b85d

  • memory/776-84-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-68-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-107-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/776-85-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-82-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-78-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-79-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-76-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-77-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-60-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/776-63-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-64-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/776-69-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/1288-87-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1288-99-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1288-100-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1784-90-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1784-98-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1784-96-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2024-95-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2024-97-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2024-93-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2140-41-0x00000000008C0000-0x00000000009DC000-memory.dmp

    Filesize

    1.1MB

  • memory/2352-0-0x000000007442E000-0x000000007442F000-memory.dmp

    Filesize

    4KB

  • memory/2352-6-0x0000000005EC0000-0x0000000005F84000-memory.dmp

    Filesize

    784KB

  • memory/2352-1-0x0000000000EA0000-0x0000000000FBC000-memory.dmp

    Filesize

    1.1MB

  • memory/2352-5-0x0000000074420000-0x0000000074B0E000-memory.dmp

    Filesize

    6.9MB

  • memory/2352-2-0x0000000074420000-0x0000000074B0E000-memory.dmp

    Filesize

    6.9MB

  • memory/2352-3-0x00000000005D0000-0x00000000005EC000-memory.dmp

    Filesize

    112KB

  • memory/2352-35-0x0000000074420000-0x0000000074B0E000-memory.dmp

    Filesize

    6.9MB

  • memory/2352-4-0x000000007442E000-0x000000007442F000-memory.dmp

    Filesize

    4KB

  • memory/2596-18-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2596-28-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2596-27-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2596-29-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2596-14-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2596-30-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2596-20-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2596-16-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2596-12-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2596-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2596-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB