Analysis

  • max time kernel
    149s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    15/08/2022, 12:13

General

  • Target
    SecuriteInfo.com.W32.AIDetectNet.01.13226.exe
  • Size 664KB
  • Sample220815-pdqtrsdcg7
  • SHA256 ceb6fcadd0f96521026c478596bbc3ba3dfdd3ecdbb2d9e4e8f5bb4a422e446d
  • MD5 SHA1 SHA512

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • obologs.work.gd:4044

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-FNXFFO

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • startup_value

    Remcos

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 3 IoCs
  • Downloads MZ/PE file
  • Executes dropped EXE 1 IoCs
  • Checks computer location settings 2 TTPs 2 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 8 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Modifies Internet Explorer settings 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 54 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 11 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 45 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:968
    • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.AIDetectNet.01.13226.exe
      "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.AIDetectNet.01.13226.exe"
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of SetThreadContext
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:4796
      • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMgAwAA==
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1660
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
        3⤵
        • Suspicious use of SetThreadContext
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of WriteProcessMemory
        PID:244
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe /stext "C:\Users\Admin\AppData\Local\Temp\rsropqettlqrcwyqrm"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:376
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe /stext "C:\Users\Admin\AppData\Local\Temp\buwgqiovhuieecmubxcdl"
          4⤵
          • Accesses Microsoft Outlook accounts
          PID:3748
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
          C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe /stext "C:\Users\Admin\AppData\Local\Temp\mocrrbzpvcajpqiykhxfoovbc"
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:3656
        • C:\Users\Admin\AppData\Local\Temp\dwn.exe
          "C:\Users\Admin\AppData\Local\Temp\dwn.exe"
          4⤵
          • Executes dropped EXE
          • Checks computer location settings
          • Suspicious use of SetThreadContext
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          • Suspicious use of WriteProcessMemory
          PID:4528
          • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
            "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -enc UwB0AGEAcgB0AC0AUwBsAGUAZQBwACAALQBTAGUAYwBvAG4AZABzACAAMgAwAA==
            5⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:4376
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
            C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
            5⤵
            • Suspicious use of SetThreadContext
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of AdjustPrivilegeToken
            PID:4400
    • C:\Windows\SysWOW64\rundll32.exe
      "C:\Windows\SysWOW64\rundll32.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Modifies Internet Explorer settings
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1112
      • C:\Program Files\Mozilla Firefox\Firefox.exe
        "C:\Program Files\Mozilla Firefox\Firefox.exe"
        3⤵
          PID:4048

    Network

          MITRE ATT&CK Enterprise v6

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          powershell.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
          • Size 1KB
          • SHA256 e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359
          • MD5 SHA1 SHA512

          ModuleAnalysisCache

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache
          • Size 53KB
          • SHA256 474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba
          • MD5 SHA1 SHA512 SSDEEP

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 16KB
          • SHA256 2281b1ad3551ba192c0407bef18e3ac75f0b8c5582dbeaef895c92c09b7fc155
          • MD5 SHA1 SHA512 SSDEEP

          dwn.exe

          • Path C:\Users\Admin\AppData\Local\Temp\dwn.exe
          • Size 638KB
          • SHA256 4f41a94071d67c2e1418e6e6a0090126b65f72ac69da4807bb3605ededa98107
          • MD5 SHA1 SHA512 SSDEEP

          dwn.exe

          • Path C:\Users\Admin\AppData\Local\Temp\dwn.exe
          • Size 638KB
          • SHA256 4f41a94071d67c2e1418e6e6a0090126b65f72ac69da4807bb3605ededa98107
          • MD5 SHA1 SHA512 SSDEEP

          rsropqettlqrcwyqrm

          • Path C:\Users\Admin\AppData\Local\Temp\rsropqettlqrcwyqrm
          • Size 4KB
          • SHA256 8d46702077d776b04085cbe5ce2f0e5971595ea4e11b025a215c4379e7fc18f8
          • MD5 SHA1 SHA512 SSDEEP

          memory/244-144-0x0000000000400000-0x000000000047E000-memory.dmp

          memory/244-162-0x0000000000400000-0x000000000047E000-memory.dmp

          memory/244-143-0x0000000000400000-0x000000000047E000-memory.dmp

          memory/244-145-0x0000000000400000-0x000000000047E000-memory.dmp

          memory/244-146-0x0000000000400000-0x000000000047E000-memory.dmp

          memory/376-152-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/968-168-0x0000000002830000-0x0000000002946000-memory.dmp

          memory/968-171-0x0000000007D30000-0x0000000007EB4000-memory.dmp

          memory/968-180-0x0000000007280000-0x000000000731C000-memory.dmp

          memory/968-179-0x0000000007280000-0x000000000731C000-memory.dmp

          memory/1112-177-0x0000000000110000-0x000000000013B000-memory.dmp

          memory/1112-176-0x00000000023D0000-0x000000000271A000-memory.dmp

          memory/1112-174-0x0000000000AB0000-0x0000000000AC4000-memory.dmp

          memory/1112-178-0x0000000002070000-0x00000000020FF000-memory.dmp

          memory/1112-175-0x0000000000110000-0x000000000013B000-memory.dmp

          memory/1660-137-0x00000000056E0000-0x0000000005746000-memory.dmp

          memory/1660-136-0x0000000005850000-0x0000000005E78000-memory.dmp

          memory/1660-138-0x0000000005EF0000-0x0000000005F56000-memory.dmp

          memory/1660-135-0x0000000002CE0000-0x0000000002D16000-memory.dmp

          memory/1660-139-0x0000000006600000-0x000000000661E000-memory.dmp

          memory/1660-141-0x0000000006B10000-0x0000000006B2A000-memory.dmp

          memory/1660-140-0x0000000007E40000-0x00000000084BA000-memory.dmp

          memory/3656-151-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/3748-150-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/4400-164-0x0000000000400000-0x000000000042B000-memory.dmp

          memory/4400-167-0x0000000001420000-0x0000000001430000-memory.dmp

          memory/4400-169-0x0000000000400000-0x000000000042B000-memory.dmp

          memory/4400-170-0x0000000001480000-0x0000000001490000-memory.dmp

          memory/4400-173-0x0000000000400000-0x000000000042B000-memory.dmp

          memory/4400-166-0x0000000001910000-0x0000000001C5A000-memory.dmp

          memory/4528-157-0x0000000000DE0000-0x0000000000E86000-memory.dmp

          memory/4796-133-0x0000000006690000-0x00000000066B2000-memory.dmp

          memory/4796-132-0x0000000000CC0000-0x0000000000D6A000-memory.dmp