Analysis

  • max time kernel
    149s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240705-en
  • resource tags

    arch:x64arch:x86image:win7-20240705-enlocale:en-usos:windows7-x64system
  • submitted
    22/08/2024, 10:13

General

  • Target

    823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe

  • Size

    966KB

  • MD5

    edee826b3e374736185ba5728ee64ec1

  • SHA1

    2d2f5a376cda7d0f309f845210730aed64e3067e

  • SHA256

    823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81

  • SHA512

    7a5ac7b1441930788a603683073d96351d853e5781ed63a7fd457565c141a059934a9e483d4bf6aff3b0f92a7b260aa77992ba674ee8f4c499e5c6ec80324b52

  • SSDEEP

    24576:d0vn0PytJPufTIMhbn/M68IeVeV+XG4ZH+V14KnmktXF:d40KtJqNU68IvV4x+lnmi1

Malware Config

Extracted

Family

remcos

Botnet

Aug 21C

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-7BIOTJ

  • 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 SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe
    "C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1672
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\SIAJcjELm.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:2836
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\SIAJcjELm" /XML "C:\Users\Admin\AppData\Local\Temp\tmpDAB5.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3000
    • C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe
      "C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe"
      2⤵
        PID:2720
      • C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe
        "C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2960
        • C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe
          C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe /stext "C:\Users\Admin\AppData\Local\Temp\mpdzxnt"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:2860
        • C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe
          C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe /stext "C:\Users\Admin\AppData\Local\Temp\wkiryydafs"
          3⤵
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:2964
        • C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe
          C:\Users\Admin\AppData\Local\Temp\823e15c33f7b0b8a824bb0d2eb2b4353b39726a314fa75c2e84b8c9f2dc0af81.exe /stext "C:\Users\Admin\AppData\Local\Temp\zmvcqqobtajcx"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of AdjustPrivilegeToken
          PID:1812

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      144B

      MD5

      300f7c3af8538a49a765912a97e210e8

      SHA1

      1bf3dcb5b7bcd0a7f9130880733856a3387af834

      SHA256

      1182a53428810f38857ae9d8c89449109100aade8047718419280ec62e3757f9

      SHA512

      46e8e05a76f0f4a2a3edee1bdb1cd4437c97407e1ddaace3d438e55f3fe5c15a65c048b2f9d0299f8145b5069182fb6773750934599ca7742d5fcb524d1eb2a5

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

      Filesize

      2B

      MD5

      f3b25701fe362ec84616a93a45ce9998

      SHA1

      d62636d8caec13f04e28442a0a6fa1afeb024bbb

      SHA256

      b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

      SHA512

      98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

    • C:\Users\Admin\AppData\Local\Temp\tmpDAB5.tmp

      Filesize

      1KB

      MD5

      a6971a256f1ac1f968bf6d8dc82d644c

      SHA1

      40c0f70aa09f00094e4a0a8e83ce3929efb4e168

      SHA256

      7513f9be914b73045e43f3c17d856d2ad3396c73e7082656660dc5c222352ca4

      SHA512

      ed914c9b0a9bb0283f541255a1671d64435f8d4144ea6155c4732af21fdffd377b505e6fab5ab76769f50cbbd21605f7d7b14859d84adb93b649c9f8c96bfc01

    • memory/1672-4-0x00000000740E0000-0x00000000747CE000-memory.dmp

      Filesize

      6.9MB

    • memory/1672-1-0x0000000001090000-0x0000000001184000-memory.dmp

      Filesize

      976KB

    • memory/1672-5-0x00000000003B0000-0x00000000003BC000-memory.dmp

      Filesize

      48KB

    • memory/1672-6-0x0000000000510000-0x0000000000520000-memory.dmp

      Filesize

      64KB

    • memory/1672-7-0x0000000005AD0000-0x0000000005B90000-memory.dmp

      Filesize

      768KB

    • memory/1672-3-0x0000000000650000-0x000000000066A000-memory.dmp

      Filesize

      104KB

    • memory/1672-2-0x00000000740E0000-0x00000000747CE000-memory.dmp

      Filesize

      6.9MB

    • memory/1672-0-0x00000000740EE000-0x00000000740EF000-memory.dmp

      Filesize

      4KB

    • memory/1672-38-0x00000000740E0000-0x00000000747CE000-memory.dmp

      Filesize

      6.9MB

    • memory/1812-58-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1812-59-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1812-57-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/2860-48-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2860-49-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2860-52-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2860-54-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/2960-34-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-15-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-19-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-17-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-39-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-42-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-43-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-40-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-41-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-45-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-100-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-32-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-21-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-23-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-25-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-99-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-27-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-92-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-33-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-37-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-29-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-66-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2960-70-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2960-69-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2960-71-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-31-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

      Filesize

      4KB

    • memory/2960-75-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-76-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-84-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-83-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2960-91-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2964-53-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2964-55-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/2964-51-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB