Analysis

  • max time kernel
    299s
  • max time network
    287s
  • platform
    windows7_x64
  • resource
    win7-20240221-en
  • resource tags

    arch:x64arch:x86image:win7-20240221-enlocale:en-usos:windows7-x64system
  • submitted
    09-04-2024 13:50

General

  • Target

    weareverybeautifulgirlsxygirlwantokissmeharderthanbeforetogetmeback___sheisverybeeautifulgirlforme (1).rtf

  • Size

    73KB

  • MD5

    f8b201556d3c349d0fce9702c424c556

  • SHA1

    fbeb803116c8e7cb2a7d8a2ce73093ff5353a70c

  • SHA256

    16550f58e8ab8fbcf7dee33901008c44dd9fba3144e1edf94a0033afce770ea1

  • SHA512

    4b748096cebd1a991e8f6c3a166347347e845e740066f0cde806d33c6f92e65774ebd573dbd67ef6aecb824aa24a1ab56813c9fc612fee9b8372430cf250e88e

  • SSDEEP

    1536:Lz7jWDvjKzZpNCYkLFjImCK3jNB3vhWQI/M+vPKkRRa+FIvMGO:LvjWDrKzmL9IM3jNRhW1M+nKkRRa+FIQ

Score
10/10

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

shgoini.com:30902

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-7XHN5V

  • 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.

  • Blocklisted process makes network request 1 IoCs
  • Downloads MZ/PE file
  • Drops startup file 1 IoCs
  • Executes dropped EXE 2 IoCs
  • Loads dropped DLL 2 IoCs
  • AutoIT Executable 2 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 1 IoCs
  • Drops file in Windows directory 1 IoCs
  • Office loads VBA resources, possible macro or embedded object present
  • Launches Equation Editor 1 TTPs 1 IoCs

    Equation Editor is an old Office component often targeted by exploits such as CVE-2017-11882.

  • Modifies Internet Explorer settings 1 TTPs 31 IoCs
  • Modifies registry class 64 IoCs
  • Suspicious behavior: AddClipboardFormatListener 1 IoCs
  • Suspicious behavior: MapViewOfSection 1 IoCs
  • Suspicious use of FindShellTrayWindow 4 IoCs
  • Suspicious use of SendNotifyMessage 4 IoCs
  • Suspicious use of SetWindowsHookEx 2 IoCs
  • Suspicious use of WriteProcessMemory 20 IoCs

Processes

  • C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE
    "C:\Program Files (x86)\Microsoft Office\Office14\WINWORD.EXE" /n "C:\Users\Admin\AppData\Local\Temp\weareverybeautifulgirlsxygirlwantokissmeharderthanbeforetogetmeback___sheisverybeeautifulgirlforme (1).rtf"
    1⤵
    • Drops file in Windows directory
    • Modifies Internet Explorer settings
    • Modifies registry class
    • Suspicious behavior: AddClipboardFormatListener
    • Suspicious use of SetWindowsHookEx
    • Suspicious use of WriteProcessMemory
    PID:2208
    • C:\Windows\splwow64.exe
      C:\Windows\splwow64.exe 12288
      2⤵
        PID:1948
    • C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE
      "C:\Program Files (x86)\Common Files\Microsoft Shared\EQUATION\EQNEDT32.EXE" -Embedding
      1⤵
      • Blocklisted process makes network request
      • Loads dropped DLL
      • Launches Equation Editor
      • Suspicious use of WriteProcessMemory
      PID:2548
      • C:\Users\Admin\AppData\Roaming\wininit.exe
        "C:\Users\Admin\AppData\Roaming\wininit.exe"
        2⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious use of FindShellTrayWindow
        • Suspicious use of SendNotifyMessage
        • Suspicious use of WriteProcessMemory
        PID:2512
        • C:\Users\Admin\AppData\Local\directory\excel.exe
          "C:\Users\Admin\AppData\Roaming\wininit.exe"
          3⤵
          • Drops startup file
          • Executes dropped EXE
          • Suspicious use of SetThreadContext
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of FindShellTrayWindow
          • Suspicious use of SendNotifyMessage
          • Suspicious use of WriteProcessMemory
          PID:2732
          • C:\Windows\SysWOW64\svchost.exe
            "C:\Users\Admin\AppData\Roaming\wininit.exe"
            4⤵
              PID:2744

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        483KB

        MD5

        a04675531940882479c988422f627c21

        SHA1

        48bb45a49c1600e8f16ffe612170787f841cd969

        SHA256

        011bee0b69f6d996fd2ddced3a417739375f6a3909ff46d23bcca2f0d14680d5

        SHA512

        f8f2e1c49d7a7153a8522488a259ff37927c6c133b2030fdf70728aa034b02f2fd704d2bba7ad6660eb0f6b3696108a26df1c479723330f49ea0e462c13ba24c

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

        Filesize

        29KB

        MD5

        7b4ee3164750a624febb01f867bdb208

        SHA1

        2c68f3bc9f02ef7229da72935b33053885ad19e0

        SHA256

        fc648d1008816e63cb562eec07b7ae56ab4c5be06da13282a213f9c9e6f3c2a5

        SHA512

        aa088d535f08520ba2299da40c2e5c6ee1375eb67ac9f2438f431bda1312d024e38793c1b074f08b0accf8bf89db630b46de5b9883036b84ab50b473bbc1dc41

      • C:\Users\Admin\AppData\Roaming\wininit.exe

        Filesize

        1.3MB

        MD5

        6b7314e8a04ad8436c3aff06f3918ea6

        SHA1

        61c5aca05c76396e70054b732d9afb7d4a5e293d

        SHA256

        c392c14304399e9ad13ede370375ecffa47f30245cb91a413a3fd1150721a929

        SHA512

        00b5c837c36cb44d5b1a7c724746daf85b4a1d4b89d55a2d81e8999ed34035baa84a8f9fc976704ec92afe52a316c09eb7b7d012d66d8d5eea284d31d5974baf

      • \Users\Admin\AppData\Local\directory\excel.exe

        Filesize

        106.3MB

        MD5

        ac23a656a0c70a57b4914472abe352b0

        SHA1

        a4ada12353b24688034b08ab4720ce156046d84a

        SHA256

        11b81c511f8007bcbc97b368d89b0a738427d1b3173736a67307a7e5c731d4f1

        SHA512

        57e2b20ef13756da5aa44047783120a917508409a7bdc05c207061412913fd4714bb550abc34c6dbe8a3b0081764a39d9051416f152361c0da558edcfb894c9a

      • memory/2208-0-0x000000002F231000-0x000000002F232000-memory.dmp

        Filesize

        4KB

      • memory/2208-1-0x000000005FFF0000-0x0000000060000000-memory.dmp

        Filesize

        64KB

      • memory/2208-2-0x000000007132D000-0x0000000071338000-memory.dmp

        Filesize

        44KB

      • memory/2208-62-0x000000007132D000-0x0000000071338000-memory.dmp

        Filesize

        44KB

      • memory/2512-25-0x0000000000120000-0x0000000000124000-memory.dmp

        Filesize

        16KB

      • memory/2744-60-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-65-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-54-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-55-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-57-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-56-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-58-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-52-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-50-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-63-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-64-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-53-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-66-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-67-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-69-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-68-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-72-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-73-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-74-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-76-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-77-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-78-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-79-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB

      • memory/2744-80-0x0000000000400000-0x0000000000482000-memory.dmp

        Filesize

        520KB