Analysis

  • max time kernel
    150s
  • max time network
    156s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20221111-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20221111-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-02-2023 19:32

General

  • Target

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe

  • Size

    7KB

  • MD5

    b359f4af5c88b1e237db9738415b7682

  • SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

  • SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

  • SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • SSDEEP

    96:xtEsKVeCVIP7bLp8LAn5c8aY1ej/kKV+J2qzNt:xUVVIP7bLrEOejcKYx

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

194.180.49.17:28282

Attributes
  • audio_folder

    MicRecords

  • audio_record_time

    5

  • connect_delay

    0

  • connect_interval

    1

  • copy_file

    rdfghfgjkgoighjc.exe

  • copy_folder

    Remcos

  • delete_file

    false

  • hide_file

    false

  • hide_keylog_file

    false

  • install_flag

    true

  • keylog_crypt

    false

  • keylog_file

    logs.dat

  • keylog_flag

    false

  • keylog_folder

    remcos

  • mouse_option

    false

  • mutex

    Rmc-PC1DJ2

  • 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.

  • Checks computer location settings 2 TTPs 3 IoCs

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

  • Executes dropped EXE 3 IoCs
  • Adds Run key to start application 2 TTPs 10 IoCs
  • Suspicious use of SetThreadContext 2 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
    "C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe"
    1⤵
    • Checks computer location settings
    • Adds Run key to start application
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2684
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1372
    • C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      C:\Users\Admin\AppData\Local\Temp\d7fa6d87594ea4d8b5740d54fdc204b08f4e9439.exe
      2⤵
      • Checks computer location settings
      • Adds Run key to start application
      • Suspicious use of WriteProcessMemory
      PID:3348
      • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
        "C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe"
        3⤵
        • Checks computer location settings
        • Executes dropped EXE
        • Adds Run key to start application
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:232
        • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
          "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -ENC cwB0AGEAcgB0AC0AcwBsAGUAZQBwACAALQBzAGUAYwBvAG4AZABzACAAMgAwAA==
          4⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4512
        • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          4⤵
          • Executes dropped EXE
          PID:3356
        • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe
          4⤵
          • Executes dropped EXE
          • Adds Run key to start application
          • Suspicious use of SetWindowsHookEx
          PID:2104

Network

MITRE ATT&CK Enterprise v6

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\ProgramData\Remcos\rdfghfgjkgoighjc.exe

    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

    Filesize

    1KB

    MD5

    4280e36a29fa31c01e4d8b2ba726a0d8

    SHA1

    c485c2c9ce0a99747b18d899b71dfa9a64dabe32

    SHA256

    e2486a1bdcba80dad6dd6210d7374bd70ae196a523c06ceda71370fd3ea78359

    SHA512

    494fe5f0ade03669e5830bed93c964d69b86629440148d7b0881cf53203fd89443ebff9b4d1ee9d96244f62af6edede622d9eacba37f80f389a0d522e4ad4ea4

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\ModuleAnalysisCache

    Filesize

    53KB

    MD5

    06ad34f9739c5159b4d92d702545bd49

    SHA1

    9152a0d4f153f3f40f7e606be75f81b582ee0c17

    SHA256

    474813b625f00710f29fa3b488235a6a22201851efb336bddf60d7d24a66bfba

    SHA512

    c272cd28ae164d465b779163ba9eca6a28261376414c6bbdfbd9f2128adb7f7ff1420e536b4d6000d0301ded2ec9036bc5c657588458bff41f176bdce8d74f92

  • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

    Filesize

    16KB

    MD5

    7eb40a98cb5b8c4776107698e13f74bf

    SHA1

    f882d5176ec8ed6b563f68c7f89f9a1240664a55

    SHA256

    8bd332437055896041270eba8cf4b5545e1756fb15fa765684cfd1ddd5afdb69

    SHA512

    6d522f6acc22d1a00ed88b557c76e846b6fc15d443136c0e97eab318f2f34b8bc6118cf3d29b2ce55295fc23c369865491304b9c6331ce3356ba9d8fd87a3e07

  • C:\Users\Admin\AppData\Roaming\Zwpfblvosjv\Phecxlkxbf.exe

    Filesize

    7KB

    MD5

    b359f4af5c88b1e237db9738415b7682

    SHA1

    d7fa6d87594ea4d8b5740d54fdc204b08f4e9439

    SHA256

    53ddb9a75bca1115a66745b28086afbd394cef38f8437dda641b1219111df8cd

    SHA512

    6d4f06f36c608d3202d29629f9d9a70eadfbffbb23c7c074fbb610ed9e1926bf6e04c8dfecbbaf1d575fb2d0385d237aff2dbda322b092d4ef7728091eb596cb

  • memory/232-147-0x0000000000000000-mapping.dmp

  • memory/1372-140-0x0000000008060000-0x00000000086DA000-memory.dmp

    Filesize

    6.5MB

  • memory/1372-138-0x0000000006190000-0x00000000061F6000-memory.dmp

    Filesize

    408KB

  • memory/1372-134-0x0000000000000000-mapping.dmp

  • memory/1372-135-0x0000000003200000-0x0000000003236000-memory.dmp

    Filesize

    216KB

  • memory/1372-136-0x00000000058F0000-0x0000000005F18000-memory.dmp

    Filesize

    6.2MB

  • memory/1372-137-0x0000000005FF0000-0x0000000006056000-memory.dmp

    Filesize

    408KB

  • memory/1372-141-0x0000000006CD0000-0x0000000006CEA000-memory.dmp

    Filesize

    104KB

  • memory/1372-139-0x00000000067F0000-0x000000000680E000-memory.dmp

    Filesize

    120KB

  • memory/2104-158-0x0000000000000000-mapping.dmp

  • memory/2104-164-0x0000000000400000-0x0000000000480000-memory.dmp

    Filesize

    512KB

  • memory/2104-163-0x0000000000400000-0x0000000000480000-memory.dmp

    Filesize

    512KB

  • memory/2104-162-0x0000000000400000-0x0000000000480000-memory.dmp

    Filesize

    512KB

  • memory/2104-161-0x0000000000400000-0x0000000000480000-memory.dmp

    Filesize

    512KB

  • memory/2684-132-0x00000000001F0000-0x00000000001F8000-memory.dmp

    Filesize

    32KB

  • memory/2684-133-0x0000000007380000-0x00000000073A2000-memory.dmp

    Filesize

    136KB

  • memory/3348-142-0x0000000000000000-mapping.dmp

  • memory/3348-143-0x0000000000400000-0x0000000000480000-memory.dmp

    Filesize

    512KB

  • memory/3348-144-0x0000000000400000-0x0000000000480000-memory.dmp

    Filesize

    512KB

  • memory/3348-145-0x0000000000400000-0x0000000000480000-memory.dmp

    Filesize

    512KB

  • memory/3348-146-0x0000000000400000-0x0000000000480000-memory.dmp

    Filesize

    512KB

  • memory/3348-149-0x0000000000400000-0x0000000000480000-memory.dmp

    Filesize

    512KB

  • memory/3356-156-0x0000000000000000-mapping.dmp

  • memory/4512-151-0x0000000000000000-mapping.dmp