Analysis

  • max time kernel
    149s
  • max time network
    142s
  • platform
    windows7_x64
  • resource
    win7-20231201-en
  • resource tags

    arch:x64arch:x86image:win7-20231201-enlocale:en-usos:windows7-x64system
  • submitted
    08/12/2023, 09:18

General

  • Target

    INVOICE0987650009.exe

  • Size

    757KB

  • MD5

    49eca8d1b29bfaec20599239db6f10da

  • SHA1

    ee605018797e3a9408e24b7ec0767ef5e096ac16

  • SHA256

    dfd724316cb0edbf1212cbf5e71f007d22b7a38e7860d96d4d4bedf17eaa85ea

  • SHA512

    a0d1d7910314cc76bdfa46b6f8cdc9909d850f7fe320be943c16bb6da86b213b23148b331626492a07fedda1932e9d09d4fd10faeb00171e43cdd801cfb71220

  • SSDEEP

    12288:HDWMD9ehE+uDneLBQt20dup/20AQBOLdxD4N1fahKDwancwk6pvxT0K0jlyOJN9I:FefZ27zZPdnjImBOQX

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

107.175.229.139:8087

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-IZFV1M

  • 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.

  • 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
  • Drops startup file 2 IoCs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious behavior: GetForegroundWindowSpam 1 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 32 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\INVOICE0987650009.exe
    "C:\Users\Admin\AppData\Local\Temp\INVOICE0987650009.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of WriteProcessMemory
    PID:2700
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\Powershell.exe
      "Powershell.exe" -ExecutionPolicy Bypass -command Copy-Item 'C:\Users\Admin\AppData\Local\Temp\INVOICE0987650009.exe' 'C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\.exe'
      2⤵
      • Drops startup file
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1760
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: GetForegroundWindowSpam
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2852
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /stext "C:\Users\Admin\AppData\Local\Temp\pkngzyxshnboqebhnrbynwrxpwmh"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:1984
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /stext "C:\Users\Admin\AppData\Local\Temp\zetzarimvvttalplxborqjlopkwqbky"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:2452
      • C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe
        C:\Windows\Microsoft.NET\Framework\v4.0.30319\cvtres.exe /stext "C:\Users\Admin\AppData\Local\Temp\kgyj"
        3⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:2016

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          230B

          MD5

          8a232fd211a2baeeefd783a660b22468

          SHA1

          fe172d2eae5ba605252e82ca5e263130bc861af7

          SHA256

          3bfcfaadecb0b655a3eda7a516e5c89bca8b2575a39e7f5bd2dff018997bad67

          SHA512

          6e15b13232b2d8df7c1660d906316dfa90406fe90593e31326f63087d265529ab3652721c5a76d4d4bf8b29ee4f927ebb2d88055650669f709a55c6366f5b0d3

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          2749ba00b283da282ed2b1b73d28d7ac

          SHA1

          751f5d26da560ab35a4c1e20c454d25e2351bfed

          SHA256

          9d4de74bc0e535dd4b4c84f7713691dd2fd01c94986d966dcb52d31c7fc2c4da

          SHA512

          965d8c7661586a4b467acac32e9f58bfeef40573cedf23704cc7c4eb9b249f0e52a92fd254373f4e22bc2513e1164227df1ea6dbca4325c251b8cd796b1c54e9

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

          Filesize

          2B

          MD5

          f3b25701fe362ec84616a93a45ce9998

          SHA1

          d62636d8caec13f04e28442a0a6fa1afeb024bbb

          SHA256

          b3d510ef04275ca8e698e5b3cbb0ece3949ef9252f0cdc839e9ee347409a2209

          SHA512

          98c5f56f3de340690c139e58eb7dac111979f0d4dffe9c4b24ff849510f4b6ffa9fd608c0a3de9ac3c9fd2190f0efaf715309061490f9755a9bfdf1c54ca0d84

        • memory/1760-10-0x0000000070570000-0x0000000070B1B000-memory.dmp

          Filesize

          5.7MB

        • memory/1760-6-0x0000000070570000-0x0000000070B1B000-memory.dmp

          Filesize

          5.7MB

        • memory/1760-7-0x0000000070570000-0x0000000070B1B000-memory.dmp

          Filesize

          5.7MB

        • memory/1760-8-0x0000000002CE0000-0x0000000002D20000-memory.dmp

          Filesize

          256KB

        • memory/1984-61-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1984-51-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1984-54-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/1984-44-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2016-64-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2016-69-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2016-68-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2016-67-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/2452-56-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/2452-70-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/2452-52-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/2452-48-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/2700-1-0x0000000074E70000-0x000000007555E000-memory.dmp

          Filesize

          6.9MB

        • memory/2700-0-0x0000000001300000-0x00000000013C4000-memory.dmp

          Filesize

          784KB

        • memory/2700-29-0x0000000074E70000-0x000000007555E000-memory.dmp

          Filesize

          6.9MB

        • memory/2700-11-0x00000000002A0000-0x00000000002A8000-memory.dmp

          Filesize

          32KB

        • memory/2700-2-0x0000000001250000-0x00000000012FE000-memory.dmp

          Filesize

          696KB

        • memory/2700-3-0x0000000000630000-0x0000000000670000-memory.dmp

          Filesize

          256KB

        • memory/2852-22-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-14-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-38-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-39-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-41-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-36-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-35-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-34-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-33-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-31-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-30-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-27-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-26-0x00000000FFFDE000-0x00000000FFFDF000-memory.dmp

          Filesize

          4KB

        • memory/2852-24-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-20-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-18-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-16-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-37-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-71-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2852-74-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2852-75-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2852-76-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2852-78-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-77-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2852-81-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-82-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-13-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-85-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2852-90-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-91-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-99-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-100-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-12-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-107-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-115-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2852-116-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB