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Analysis

  • max time kernel
    148s
  • max time network
    130s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04/09/2024, 14:54

General

  • Target

    b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe

  • Size

    991KB

  • MD5

    4839930b3f7915602fd40251b76bb9c5

  • SHA1

    fe3a9de406d44c6a9aa5a6ad1fede58f6a0e413f

  • SHA256

    b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e

  • SHA512

    54b4b3ba92406fb1417eda6366cc4806f10dfae1233cb009c697a8b95f990bd497a7e50140f48406566e16dedf0a62a0f71f25d862d1113a92d6277cacf5016f

  • SSDEEP

    12288:vdZshZWHXnhEE8tpUEx1I94L+R49xIUBZjlP4JH0Y6QC4zmEs0mwF0WOs5HvrWZO:vzshZEXw7jIS6RuXGUDQFDMEKW4THM00

Malware Config

Extracted

Family

remcos

Botnet

Aug 23C

C2

method8888.ddns.net:6902

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-RCNGU6

  • 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 2 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 8 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 4 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 44 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
    "C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2516
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2892
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\TkhOsslQS.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2828
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TkhOsslQS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp365C.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:2812
    • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
      "C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:1796
      • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
        C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\hsmmnwqjgv"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:1812
      • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
        C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\rmsenpbkuegozv"
        3⤵
          PID:1728
        • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
          C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\rmsenpbkuegozv"
          3⤵
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:2372
        • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
          C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\coxpghmeimytjbxrz"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:1144

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      144B

      MD5

      cd477b7af93f839bc22b2717aaf721ff

      SHA1

      c38d3142db4322f5bfc8778b0eba8d21c1f56eb7

      SHA256

      e3eebdcb9b548b5b38e74927df5acd458f01a61d4daa96a31ba24a35d9140560

      SHA512

      138aca623ea324d6e36593dff9b72f205989b5be3e3e4c3bb3759653692cc484e84f2323adcfbf603ef25ddee5100fcf14a8f1c3b34120610538df6967da9e19

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

      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • C:\Users\Admin\AppData\Local\Temp\tmp365C.tmp

      Filesize

      1KB

      MD5

      cb34ad31404fb39f12b5ef6710db8609

      SHA1

      1a856ecd475da91736f28985bc114972e3f288c4

      SHA256

      796772e66e8e0c025c123e1ce39f8de41b56bd492143d4a5855011df8c557aa2

      SHA512

      62e353938c81abf575e4f7f1cf85d2b4c424f8bc79ad82ef8ed258e4c1dd72710f23c89773d2e0da4d82adec05442641604584c7fd91a4be970f67b3c98aaca5

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

      Filesize

      7KB

      MD5

      ec6f486cca964e9b1c13977d74103594

      SHA1

      097b4b627ca6097c4921f4f1e683e039b5ad90b2

      SHA256

      462c691b6846ab09e99293a82dce2f2695464e5dfb141f2fd50915e3dcc68e76

      SHA512

      dff1db533bf9814607662f277b169cccec7bf467fb14633a87e41b6e3c99888003407186da8d5aad3bb2dfabf0ad49a96ab0dae6b9cbf7a91ca16e378a7da50b

    • memory/1144-58-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1144-61-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1144-63-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1796-48-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-71-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-101-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-100-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-22-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-23-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-25-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-29-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-35-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-93-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-40-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-39-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-38-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-37-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1796-33-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-31-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-27-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-43-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-45-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-46-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-47-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-92-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-49-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-51-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-85-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-84-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-77-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1796-76-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1796-75-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1796-72-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/1796-70-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/1812-56-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1812-53-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/1812-52-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/1812-62-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2372-55-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2372-60-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2372-59-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2372-54-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2516-2-0x0000000074A80000-0x000000007516E000-memory.dmp

      Filesize

      6.9MB

    • memory/2516-4-0x0000000000A10000-0x0000000000A2A000-memory.dmp

      Filesize

      104KB

    • memory/2516-8-0x0000000005010000-0x00000000050D0000-memory.dmp

      Filesize

      768KB

    • memory/2516-1-0x00000000013A0000-0x000000000149A000-memory.dmp

      Filesize

      1000KB

    • memory/2516-5-0x0000000074A80000-0x000000007516E000-memory.dmp

      Filesize

      6.9MB

    • memory/2516-3-0x0000000004F20000-0x0000000005008000-memory.dmp

      Filesize

      928KB

    • memory/2516-0-0x0000000074A8E000-0x0000000074A8F000-memory.dmp

      Filesize

      4KB

    • memory/2516-44-0x0000000074A80000-0x000000007516E000-memory.dmp

      Filesize

      6.9MB

    • memory/2516-6-0x0000000000A70000-0x0000000000A7C000-memory.dmp

      Filesize

      48KB

    • memory/2516-7-0x0000000000A80000-0x0000000000A90000-memory.dmp

      Filesize

      64KB