Analysis

  • max time kernel
    149s
  • max time network
    145s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-09-2024 02:01

General

  • Target

    84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe

  • Size

    953KB

  • MD5

    e7da9da76702fefa71e67e7c2d67eb70

  • SHA1

    c97603e9070393fa9bb56e8674512cde49bfe444

  • SHA256

    84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54

  • SHA512

    37a6f8be2cc4835a4bb15d5e4f86d1c9390cb94480642dfee08210640e679d694a8031fbd68d8ec1b84f8d4ff01ad33794562ec1456c262a4d10bc4fd483fd4c

  • SSDEEP

    24576:B0R6OKfNjIxTUYFb5rTGx+Up4/r6HOzHEEg5d:eGfqV5t5rKTa/9HEV

Malware Config

Extracted

Family

remcos

Botnet

blvinc

C2

blv23728.ddns.net:1973

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-NGC4XU

  • 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.

  • Checks computer location settings 2 TTPs 1 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
  • 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 6 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe
    "C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3664
    • 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\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4768
    • C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe
      "C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:4340
      • C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe
        C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe /stext "C:\Users\Admin\AppData\Local\Temp\ygrkiqvvrhpzjqvrbuscsjlhzkft"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:3428
      • C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe
        C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe /stext "C:\Users\Admin\AppData\Local\Temp\ijwdbagxnphmmwrdkffvvwxyizouqvc"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:4424
      • C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe
        C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe /stext "C:\Users\Admin\AppData\Local\Temp\tdbobtzqbxzrwkfhbqrxgbspqfgdjybtwa"
        3⤵
          PID:3592
        • C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe
          C:\Users\Admin\AppData\Local\Temp\84bb8bba33e1a515260b02421d72da6ad0d685d432c64c572a230337dca28c54.exe /stext "C:\Users\Admin\AppData\Local\Temp\tdbobtzqbxzrwkfhbqrxgbspqfgdjybtwa"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4668

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      144B

      MD5

      5e655867224ef0165f35ca841e52612b

      SHA1

      a382dc990b35a6c0e990b1b89ab8a1f0a05d4d03

      SHA256

      718688456507beb82d43e49cea5b975837075a47bb0eb78a7649852bfb0b2f45

      SHA512

      da53f5a9605e0ee10730a771b67e09f61e4c764a06d5634ab05d5c56721322328d40c456a0aa30242d595a93962269762fb9f7da09b0b830de22ec987638b0dd

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_avnv2a15.ki4.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

      Filesize

      4KB

      MD5

      8b8277c8f03c24d1f290dbe476e961d2

      SHA1

      2e13baf3a4b708277d550dc3dd1e0f99b131f78e

      SHA256

      9af6881f6dbffba028a7a977f4c0a43c764f840332986993ad66de7b816c2f9e

      SHA512

      7367a0236cd0d6cd731caf1ba1f4ea8f851ea1018a9c6b49db6e9d13b2aaba92767774da9169481918e4287021ff5c3a58c3143eaa5e7fe9fa88383208615948

    • memory/3428-74-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3428-82-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3428-76-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3664-4-0x0000000074580000-0x0000000074D30000-memory.dmp

      Filesize

      7.7MB

    • memory/3664-7-0x000000007458E000-0x000000007458F000-memory.dmp

      Filesize

      4KB

    • memory/3664-8-0x0000000074580000-0x0000000074D30000-memory.dmp

      Filesize

      7.7MB

    • memory/3664-9-0x0000000006490000-0x0000000006550000-memory.dmp

      Filesize

      768KB

    • memory/3664-10-0x0000000008B00000-0x0000000008B9C000-memory.dmp

      Filesize

      624KB

    • memory/3664-6-0x00000000052E0000-0x00000000052F8000-memory.dmp

      Filesize

      96KB

    • memory/3664-5-0x00000000050E0000-0x00000000050EA000-memory.dmp

      Filesize

      40KB

    • memory/3664-0-0x000000007458E000-0x000000007458F000-memory.dmp

      Filesize

      4KB

    • memory/3664-3-0x0000000005150000-0x00000000051E2000-memory.dmp

      Filesize

      584KB

    • memory/3664-2-0x0000000005700000-0x0000000005CA4000-memory.dmp

      Filesize

      5.6MB

    • memory/3664-1-0x0000000000610000-0x0000000000700000-memory.dmp

      Filesize

      960KB

    • memory/3664-20-0x0000000074580000-0x0000000074D30000-memory.dmp

      Filesize

      7.7MB

    • memory/4340-122-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-42-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-73-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-115-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-114-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-107-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-106-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-99-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-21-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-98-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-15-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-94-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-41-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-123-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-43-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-44-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-92-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/4340-93-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/4340-58-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-89-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/4340-16-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-19-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-14-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-12-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4340-11-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4424-81-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/4424-75-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/4424-77-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/4668-78-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/4668-79-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/4668-80-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/4768-65-0x00000000073D0000-0x00000000073DE000-memory.dmp

      Filesize

      56KB

    • memory/4768-56-0x0000000007050000-0x000000000706E000-memory.dmp

      Filesize

      120KB

    • memory/4768-66-0x00000000073E0000-0x00000000073F4000-memory.dmp

      Filesize

      80KB

    • memory/4768-62-0x0000000007210000-0x000000000721A000-memory.dmp

      Filesize

      40KB

    • memory/4768-61-0x00000000071A0000-0x00000000071BA000-memory.dmp

      Filesize

      104KB

    • memory/4768-60-0x00000000077E0000-0x0000000007E5A000-memory.dmp

      Filesize

      6.5MB

    • memory/4768-64-0x00000000073A0000-0x00000000073B1000-memory.dmp

      Filesize

      68KB

    • memory/4768-71-0x00000000745A0000-0x0000000074D50000-memory.dmp

      Filesize

      7.7MB

    • memory/4768-68-0x00000000074C0000-0x00000000074C8000-memory.dmp

      Filesize

      32KB

    • memory/4768-67-0x00000000074E0000-0x00000000074FA000-memory.dmp

      Filesize

      104KB

    • memory/4768-59-0x0000000007070000-0x0000000007113000-memory.dmp

      Filesize

      652KB

    • memory/4768-63-0x0000000007420000-0x00000000074B6000-memory.dmp

      Filesize

      600KB

    • memory/4768-46-0x00000000702A0000-0x00000000702EC000-memory.dmp

      Filesize

      304KB

    • memory/4768-45-0x0000000006450000-0x0000000006482000-memory.dmp

      Filesize

      200KB

    • memory/4768-40-0x0000000005EB0000-0x0000000005EFC000-memory.dmp

      Filesize

      304KB

    • memory/4768-39-0x0000000005E70000-0x0000000005E8E000-memory.dmp

      Filesize

      120KB

    • memory/4768-38-0x00000000059B0000-0x0000000005D04000-memory.dmp

      Filesize

      3.3MB

    • memory/4768-28-0x0000000005840000-0x00000000058A6000-memory.dmp

      Filesize

      408KB

    • memory/4768-27-0x00000000057D0000-0x0000000005836000-memory.dmp

      Filesize

      408KB

    • memory/4768-26-0x0000000004EC0000-0x0000000004EE2000-memory.dmp

      Filesize

      136KB

    • memory/4768-25-0x0000000005030000-0x0000000005658000-memory.dmp

      Filesize

      6.2MB

    • memory/4768-24-0x00000000745A0000-0x0000000074D50000-memory.dmp

      Filesize

      7.7MB

    • memory/4768-23-0x0000000002560000-0x0000000002596000-memory.dmp

      Filesize

      216KB

    • memory/4768-22-0x00000000745AE000-0x00000000745AF000-memory.dmp

      Filesize

      4KB