Analysis

  • max time kernel
    151s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20220812-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20220812-enlocale:en-usos:windows10-2004-x64system
  • submitted
    18/08/2022, 09:41

General

  • Target
    SecuriteInfo.com.W32.AIDetectNet.01.11160.exe
  • Size 21KB
  • Sample220818-lnrl9scfaq
  • SHA256 cd5f1820af33d2e6f034ca088a5fd83592835c722aca63d9f4912ea2e7996d00
  • 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-RZY1YR

  • 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 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 4 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.

  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 7 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 60 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 10 IoCs
  • Suspicious use of AdjustPrivilegeToken 7 IoCs
  • Suspicious use of WriteProcessMemory 48 IoCs

Processes

  • C:\Windows\Explorer.EXE
    C:\Windows\Explorer.EXE
    1⤵
    • Suspicious behavior: GetForegroundWindowSpam
    • Suspicious use of WriteProcessMemory
    PID:440
    • C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.AIDetectNet.01.11160.exe
      "C:\Users\Admin\AppData\Local\Temp\SecuriteInfo.com.W32.AIDetectNet.01.11160.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:3420
      • 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:4928
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\aspnet_compiler.exe
        3⤵
          PID:5052
        • 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:2296
          • 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\yziy"
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            PID:3364
          • 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\itnjhlz"
            4⤵
            • Accesses Microsoft Outlook accounts
            PID:3508
          • 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\tvsbiekrrr"
            4⤵
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:1624
          • 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:1408
            • 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:3620
            • 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:3576
      • C:\Windows\SysWOW64\help.exe
        "C:\Windows\SysWOW64\help.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:408
        • C:\Program Files\Mozilla Firefox\Firefox.exe
          "C:\Program Files\Mozilla Firefox\Firefox.exe"
          3⤵
            PID:3984

      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 62fb25e67af82c5fbb86882bdda1170799ba8dfc64ba326acdda337b987c2ed8
            • MD5 SHA1 SHA512 SSDEEP

            dwn.exe

            • Path C:\Users\Admin\AppData\Local\Temp\dwn.exe
            • Size 19KB
            • SHA256 7b2c943a5f976098792127dad0dff431b4e0b7e97bfd0480f608b5d875504044
            • MD5 SHA1 SHA512 SSDEEP

            dwn.exe

            • Path C:\Users\Admin\AppData\Local\Temp\dwn.exe
            • Size 19KB
            • SHA256 7b2c943a5f976098792127dad0dff431b4e0b7e97bfd0480f608b5d875504044
            • MD5 SHA1 SHA512 SSDEEP

            yziy

            • Path C:\Users\Admin\AppData\Local\Temp\yziy
            • Size 4KB
            • SHA256 7da679f4a73a6fa461c827f66b413417ef512477fa020da068829ce994b9d433
            • MD5 SHA1 SHA512 SSDEEP

            memory/408-173-0x0000000000530000-0x0000000000537000-memory.dmp

            memory/408-174-0x0000000001540000-0x000000000188A000-memory.dmp

            memory/408-175-0x0000000000E60000-0x0000000000E8B000-memory.dmp

            memory/408-176-0x00000000013B0000-0x000000000143F000-memory.dmp

            memory/408-177-0x0000000000E60000-0x0000000000E8B000-memory.dmp

            memory/440-170-0x00000000078B0000-0x0000000007A3B000-memory.dmp

            memory/440-178-0x0000000007A40000-0x0000000007B91000-memory.dmp

            memory/440-179-0x0000000007A40000-0x0000000007B91000-memory.dmp

            memory/1408-158-0x00000000006D0000-0x00000000006DA000-memory.dmp

            memory/1624-153-0x0000000000400000-0x0000000000424000-memory.dmp

            memory/2296-147-0x0000000000400000-0x000000000047E000-memory.dmp

            memory/2296-146-0x0000000000400000-0x000000000047E000-memory.dmp

            memory/2296-145-0x0000000000400000-0x000000000047E000-memory.dmp

            memory/2296-144-0x0000000000400000-0x000000000047E000-memory.dmp

            memory/2296-164-0x0000000000400000-0x000000000047E000-memory.dmp

            memory/3364-154-0x0000000000400000-0x0000000000478000-memory.dmp

            memory/3364-152-0x0000000000400000-0x0000000000478000-memory.dmp

            memory/3420-132-0x0000000000010000-0x000000000001A000-memory.dmp

            memory/3420-133-0x0000000005470000-0x0000000005492000-memory.dmp

            memory/3508-151-0x0000000000400000-0x0000000000457000-memory.dmp

            memory/3576-169-0x0000000001540000-0x0000000001550000-memory.dmp

            memory/3576-172-0x0000000000400000-0x000000000042B000-memory.dmp

            memory/3576-166-0x0000000000400000-0x000000000042B000-memory.dmp

            memory/3576-168-0x0000000001A00000-0x0000000001D4A000-memory.dmp

            memory/4928-137-0x0000000005EA0000-0x0000000005F06000-memory.dmp

            memory/4928-140-0x0000000007CA0000-0x000000000831A000-memory.dmp

            memory/4928-139-0x0000000006650000-0x000000000666E000-memory.dmp

            memory/4928-138-0x0000000006000000-0x0000000006066000-memory.dmp

            memory/4928-141-0x0000000006B40000-0x0000000006B5A000-memory.dmp

            memory/4928-136-0x0000000005870000-0x0000000005E98000-memory.dmp

            memory/4928-135-0x0000000003090000-0x00000000030C6000-memory.dmp