Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    07/04/2024, 01:27

General

  • Target
    Purchase Order Specifications 2024.exe
  • Size 891KB
  • Sample240407-bvgershb91
  • SHA256 f486a970c3228b346008eb169500d373560ea047084818b77357ba68bfa960af
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • RemoteHost

C2
  • paygateme.net:2286

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-WTDTSU

  • screenshot_crypt

    true

  • screenshot_flag

    true

  • screenshot_folder

    Screenshots

  • screenshot_path

    %AppData%

  • screenshot_time

    1

  • take_screenshot_option

    false

  • take_screenshot_time

    5

Signatures

  • Remcos

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

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 25 IoCs
  • Detects executables built or packed with MPress PE compressor 18 IoCs
  • Detects executables packed with SmartAssembly 2 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 2 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 2 IoCs
  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 7 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

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

  • 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 SetThreadContext 4 IoCs
  • Enumerates physical storage devices 1 TTPs

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

  • Creates scheduled task(s) 1 TTPs 1 IoCs

    Schtasks is often used by malware for persistence or to perform post-infection execution.

  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 33 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe
    "C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1832
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\FCsxaE.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:4796
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\FCsxaE" /XML "C:\Users\Admin\AppData\Local\Temp\tmp94AE.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3616
    • C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe
      "C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:3172
      • C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe
        "C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe" /stext "C:\Users\Admin\AppData\Local\Temp\dlmpqwrhd"
        3⤵
          PID:3500
        • C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe
          "C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe" /stext "C:\Users\Admin\AppData\Local\Temp\dlmpqwrhd"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:4396
        • C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe
          "C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe" /stext "C:\Users\Admin\AppData\Local\Temp\ofrijpbbrjztq"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:2828
        • C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe
          "C:\Users\Admin\AppData\Local\Temp\Purchase Order Specifications 2024.exe" /stext "C:\Users\Admin\AppData\Local\Temp\qhwbjhmcnrryspjd"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:5116

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          logs.dat

          • Path C:\ProgramData\remcos\logs.dat
          • Size 144B
          • SHA256 fb884531e01a6c51d24c343835f1e1b63bfae84fbfc7a9d28d1e3c90b36dc5a5
          • MD5 SHA1 SHA512

          __PSScriptPolicyTest_5rgeqqhr.keo.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5rgeqqhr.keo.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          dlmpqwrhd

          • Path C:\Users\Admin\AppData\Local\Temp\dlmpqwrhd
          • Size 4KB
          • SHA256 30190665467845aed54732c31c7e385368c10acb595cffdd7ca9523fff051a19
          • MD5 SHA1 SHA512 SSDEEP

          tmp94AE.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\tmp94AE.tmp
          • Size 1KB
          • SHA256 f8c03d26ee0ccb763886aed197a865259fd2b964c5c7743f89fbf00d1e92ccf5
          • MD5 SHA1 SHA512

          memory/1832-4-0x0000000004F00000-0x0000000004F10000-memory.dmp

          memory/1832-5-0x0000000004D40000-0x0000000004D4A000-memory.dmp

          memory/1832-6-0x0000000004E80000-0x0000000004E90000-memory.dmp

          memory/1832-7-0x0000000004EA0000-0x0000000004EAC000-memory.dmp

          memory/1832-8-0x0000000006150000-0x0000000006210000-memory.dmp

          memory/1832-9-0x0000000008AA0000-0x0000000008B3C000-memory.dmp

          memory/1832-38-0x0000000074880000-0x0000000075030000-memory.dmp

          memory/1832-15-0x0000000074880000-0x0000000075030000-memory.dmp

          memory/1832-21-0x0000000004F00000-0x0000000004F10000-memory.dmp

          memory/1832-3-0x0000000004C90000-0x0000000004D22000-memory.dmp

          memory/1832-2-0x0000000005340000-0x00000000058E4000-memory.dmp

          memory/1832-0-0x00000000001D0000-0x00000000002B6000-memory.dmp

          memory/1832-1-0x0000000074880000-0x0000000075030000-memory.dmp

          memory/2828-88-0x0000000000400000-0x0000000000462000-memory.dmp

          memory/2828-99-0x0000000000400000-0x0000000000462000-memory.dmp

          memory/2828-96-0x0000000000400000-0x0000000000462000-memory.dmp

          memory/2828-92-0x0000000000400000-0x0000000000462000-memory.dmp

          memory/3172-41-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-113-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/3172-37-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-79-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-126-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-43-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-125-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-44-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-24-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-123-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/3172-47-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-134-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-118-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-116-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-115-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/3172-26-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-114-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/3172-110-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/3172-22-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-135-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-142-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-143-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-151-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-152-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-86-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-85-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-83-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-80-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-81-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3172-78-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/4396-98-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/4396-108-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/4396-95-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/4396-91-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/4396-87-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/4796-42-0x0000000005E00000-0x0000000005E66000-memory.dmp

          memory/4796-51-0x0000000007310000-0x0000000007342000-memory.dmp

          memory/4796-73-0x00000000079A0000-0x00000000079BA000-memory.dmp

          memory/4796-69-0x00000000078E0000-0x0000000007976000-memory.dmp

          memory/4796-68-0x00000000076D0000-0x00000000076DA000-memory.dmp

          memory/4796-72-0x00000000078A0000-0x00000000078B4000-memory.dmp

          memory/4796-67-0x0000000007660000-0x000000000767A000-memory.dmp

          memory/4796-74-0x0000000007980000-0x0000000007988000-memory.dmp

          memory/4796-65-0x0000000007550000-0x00000000075F3000-memory.dmp

          memory/4796-66-0x0000000007CA0000-0x000000000831A000-memory.dmp

          memory/4796-14-0x0000000002A10000-0x0000000002A46000-memory.dmp

          memory/4796-63-0x0000000004F90000-0x0000000004FA0000-memory.dmp

          memory/4796-17-0x0000000004F90000-0x0000000004FA0000-memory.dmp

          memory/4796-19-0x00000000055D0000-0x0000000005BF8000-memory.dmp

          memory/4796-70-0x0000000007860000-0x0000000007871000-memory.dmp

          memory/4796-77-0x0000000074880000-0x0000000075030000-memory.dmp

          memory/4796-18-0x0000000004F90000-0x0000000004FA0000-memory.dmp

          memory/4796-64-0x0000000004F90000-0x0000000004FA0000-memory.dmp

          memory/4796-62-0x00000000068F0000-0x000000000690E000-memory.dmp

          memory/4796-52-0x0000000071070000-0x00000000710BC000-memory.dmp

          memory/4796-50-0x000000007FAA0000-0x000000007FAB0000-memory.dmp

          memory/4796-49-0x0000000006360000-0x00000000063AC000-memory.dmp

          memory/4796-48-0x0000000006330000-0x000000000634E000-memory.dmp

          memory/4796-45-0x0000000005E70000-0x00000000061C4000-memory.dmp

          memory/4796-71-0x0000000007890000-0x000000000789E000-memory.dmp

          memory/4796-40-0x0000000005D90000-0x0000000005DF6000-memory.dmp

          memory/4796-23-0x0000000005370000-0x0000000005392000-memory.dmp

          memory/4796-20-0x0000000074880000-0x0000000075030000-memory.dmp

          memory/5116-93-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/5116-106-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/5116-105-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/5116-103-0x0000000000400000-0x0000000000424000-memory.dmp