Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    27-11-2024 11:36

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 6 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: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 5 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 64 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:340
    • 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:584
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp82B.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2440
    • 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:2744
      • 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:2668
        • 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:2844
        • C:\Windows\SysWOW64\schtasks.exe
          "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\QgjhVvUyb" /XML "C:\Users\Admin\AppData\Local\Temp\tmp5783.tmp"
          4⤵
          • System Location Discovery: System Language Discovery
          • Scheduled Task/Job: Scheduled Task
          PID:2960
        • 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: GetForegroundWindowSpam
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2360
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\yvubuxnsbxmwrbfoexirblqmmfwmra"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:956
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\iphuuqyupfejuhbaohvsmqldumovslzkbg"
            5⤵
            • Executes dropped EXE
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:1872
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\srnnvi"
            5⤵
            • Executes dropped EXE
            PID:2072
          • C:\ProgramData\Remcos\remcos.exe
            C:\ProgramData\Remcos\remcos.exe /stext "C:\Users\Admin\AppData\Local\Temp\srnnvi"
            5⤵
            • Executes dropped EXE
            • System Location Discovery: System Language Discovery
            • Suspicious use of AdjustPrivilegeToken
            PID:848

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\Remcos\logs.dat

    Filesize

    144B

    MD5

    d9136d8930999d8654b1454b913fc555

    SHA1

    a3d29dc3a75901e35dbf0f0d720ab11c1a5e8c96

    SHA256

    e89688755cfec3daaee66fe869976802a3ef761f67707daea762bd04f408b70f

    SHA512

    7b3a878718db12638b2924aa1a8b0847cd76dcd58a373453a92de95d60f80e844e526f0af98d982135c1ea408c62240500e81aefebaa8b1f58deab16e671bbec

  • C:\Users\Admin\AppData\Local\Temp\tmp82B.tmp

    Filesize

    1KB

    MD5

    dd15b48abd3ebe9352b4d448e3f24994

    SHA1

    bcb8d86b0dd649e7d6024f6fb76bcdc238ceb731

    SHA256

    0b29bc6496a2e96ddcb75b55bd9526f0519f744cfbb55eaa6340c3f2a72b569a

    SHA512

    7d27d40296ad3b6dd0c96d3d9eff2b0d608d42cd65fa8c08b4cf5bfd5ca14776108a571d0e1774020089756c94fedc826f48153d5f5d6566ff9ba85964c21504

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

    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

    6ae2f04616baaae12dca04548c560438

    SHA1

    ec2534b24d334a8669d3fd0e86061e95a9369bc4

    SHA256

    8976cb3ceb8693b480369be82251832509787d479c746f8f3fb7485e6d794e66

    SHA512

    6c45c2828a7c2b8a55abf7fd9407d39e6397e257485af14d4e69b69a38cf2fe590a3dc59a041b468eb88e0b762506de260e437b636d6a4c9bd655752df20f3c6

  • \ProgramData\Remcos\remcos.exe

    Filesize

    1.1MB

    MD5

    7d78937ebc3648958437741df13eec52

    SHA1

    9b30169d5adb06c082d6b9e297368faad45725f5

    SHA256

    ed73c850e933acc5b599b4afb095b7e1244133c28e94fdb30ffb31b22a4b3c6a

    SHA512

    7e1acb40093bdb9a23d598a5766011409e6ef88b329c69eec3b32ea6873817e09b41e70383ae5eed3752283087db35ede2f28bf291c49df14fbeaf5b98decba4

  • memory/340-4-0x000000007463E000-0x000000007463F000-memory.dmp

    Filesize

    4KB

  • memory/340-34-0x0000000074630000-0x0000000074D1E000-memory.dmp

    Filesize

    6.9MB

  • memory/340-5-0x0000000074630000-0x0000000074D1E000-memory.dmp

    Filesize

    6.9MB

  • memory/340-0-0x000000007463E000-0x000000007463F000-memory.dmp

    Filesize

    4KB

  • memory/340-3-0x0000000000930000-0x000000000094C000-memory.dmp

    Filesize

    112KB

  • memory/340-2-0x0000000074630000-0x0000000074D1E000-memory.dmp

    Filesize

    6.9MB

  • memory/340-1-0x0000000000F20000-0x000000000103C000-memory.dmp

    Filesize

    1.1MB

  • memory/340-6-0x0000000005E00000-0x0000000005EC4000-memory.dmp

    Filesize

    784KB

  • memory/848-96-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/848-98-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/848-99-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/956-92-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/956-88-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/956-86-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1872-100-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1872-94-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1872-90-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2360-83-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-65-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2360-74-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-73-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-68-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-69-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-77-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-76-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-78-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-79-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-81-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-106-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2360-84-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2668-41-0x0000000000110000-0x000000000022C000-memory.dmp

    Filesize

    1.1MB

  • memory/2744-18-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2744-20-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2744-22-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2744-24-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2744-26-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2744-16-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2744-28-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2744-30-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2744-31-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2744-14-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/2744-32-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB