Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240426-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240426-enlocale:en-usos:windows10-2004-x64system
  • submitted
    14/05/2024, 06:07

General

  • Target
    0093222024135.exe
  • Size 289KB
  • Sample240514-gva6msdf54
  • SHA256 fe5e2d4546cfb9f6ec3f5a87e79ab352e57e1528fd4b4f0d657485285f9bdc82
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • 185.29.9.120:2404

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-QN9BDD

  • screenshot_crypt

    false

  • screenshot_flag

    false

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    10

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Guloader,Cloudeye

    A shellcode based downloader first seen in 2020.

  • Remcos

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

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 6 IoCs
  • Loads dropped DLL 1 IoCs
  • 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 NtCreateThreadExHideFromDebugger 1 IoCs
  • Suspicious use of NtSetInformationThreadHideFromDebugger 2 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Drops file in Windows directory 3 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of WriteProcessMemory 14 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0093222024135.exe
    "C:\Users\Admin\AppData\Local\Temp\0093222024135.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of NtSetInformationThreadHideFromDebugger
    • Suspicious use of SetThreadContext
    • Drops file in Windows directory
    • Suspicious behavior: MapViewOfSection
    • Suspicious use of WriteProcessMemory
    PID:2864
    • C:\Users\Admin\AppData\Local\Temp\0093222024135.exe
      "C:\Users\Admin\AppData\Local\Temp\0093222024135.exe"
      2⤵
      • Suspicious use of NtCreateThreadExHideFromDebugger
      • Suspicious use of NtSetInformationThreadHideFromDebugger
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of WriteProcessMemory
      PID:4924
      • C:\Users\Admin\AppData\Local\Temp\0093222024135.exe
        C:\Users\Admin\AppData\Local\Temp\0093222024135.exe /stext "C:\Users\Admin\AppData\Local\Temp\pbbyvebgqpbr"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:116
      • C:\Users\Admin\AppData\Local\Temp\0093222024135.exe
        C:\Users\Admin\AppData\Local\Temp\0093222024135.exe /stext "C:\Users\Admin\AppData\Local\Temp\zdgjoxliextwlth"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:5076
      • C:\Users\Admin\AppData\Local\Temp\0093222024135.exe
        C:\Users\Admin\AppData\Local\Temp\0093222024135.exe /stext "C:\Users\Admin\AppData\Local\Temp\kxmbppwbafljnzvcxz"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1892

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        System.dll

        • Path C:\Users\Admin\AppData\Local\Temp\nsb570A.tmp\System.dll
        • Size 11KB
        • SHA256 c2f405d7402f815d0c3fadd9a50f0bbbb1bab9aa38fe347823478a2587299448
        • MD5 SHA1 SHA512 SSDEEP

        pbbyvebgqpbr

        • Path C:\Users\Admin\AppData\Local\Temp\pbbyvebgqpbr
        • Size 4KB
        • SHA256 41fcf3117cab8796adc9854cf66a6533fc2766f0e36abdaf04ce5fd7c13f5a50
        • MD5 SHA1 SHA512 SSDEEP

        Isopodous.lnk

        • Path C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Printer Shortcuts\Isopodous.lnk
        • Size 995B
        • SHA256 cbfc5e8901a37aa16803480ea17a82648bd7ec7e71e6d67aa3a963b49cc686f2
        • MD5 SHA1 SHA512

        memory/116-320-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/116-322-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/116-315-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/116-335-0x0000000000400000-0x0000000000478000-memory.dmp

        memory/1892-324-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/1892-326-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/1892-325-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/1892-332-0x0000000000400000-0x0000000000424000-memory.dmp

        memory/2864-305-0x0000000004850000-0x0000000006938000-memory.dmp

        memory/2864-313-0x0000000004850000-0x0000000006938000-memory.dmp

        memory/2864-307-0x0000000010004000-0x0000000010005000-memory.dmp

        memory/2864-306-0x00000000773C1000-0x00000000774E1000-memory.dmp

        memory/4924-342-0x00000000343D0000-0x00000000343E9000-memory.dmp

        memory/4924-343-0x0000000000470000-0x00000000016C4000-memory.dmp

        memory/4924-352-0x0000000000470000-0x00000000016C4000-memory.dmp

        memory/4924-350-0x0000000000470000-0x00000000016C4000-memory.dmp

        memory/4924-349-0x0000000000470000-0x00000000016C4000-memory.dmp

        memory/4924-309-0x0000000000470000-0x00000000016C4000-memory.dmp

        memory/4924-338-0x00000000343D0000-0x00000000343E9000-memory.dmp

        memory/4924-308-0x00000000016D0000-0x00000000037B8000-memory.dmp

        memory/4924-341-0x00000000343D0000-0x00000000343E9000-memory.dmp

        memory/4924-347-0x0000000000470000-0x00000000016C4000-memory.dmp

        memory/4924-344-0x0000000000470000-0x00000000016C4000-memory.dmp

        memory/4924-345-0x00000000016D0000-0x00000000037B8000-memory.dmp

        memory/4924-346-0x0000000000470000-0x00000000016C4000-memory.dmp

        memory/5076-323-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/5076-319-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/5076-316-0x0000000000400000-0x0000000000462000-memory.dmp

        memory/5076-317-0x0000000000400000-0x0000000000462000-memory.dmp