Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20231215-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20231215-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/02/2024, 02:13

General

  • Target
    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
  • Size 1.0MB
  • Sample240213-cnf14aah62
  • SHA256 3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b
  • MD5 SHA1 SHA512 SSDEEP

Malware Config

Extracted

Family
  • remcos

Botnet
  • P2-bin

C2
  • 84.38.132.126:61445

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-ANE1CN

  • 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.

  • Detects Windows exceutables bypassing UAC using CMSTP COM interfaces. MITRE (T1218.003) 26 IoCs
  • Detects executables built or packed with MPress PE compressor 17 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 2 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 13 IoCs
  • Suspicious behavior: MapViewOfSection 4 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 36 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
    "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:1560
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1096
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\bZurkfs.exe"
      2⤵
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:3520
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bZurkfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmpADB5.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:3800
    • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
      "C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe"
      2⤵
      • Suspicious use of SetThreadContext
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of SetWindowsHookEx
      • Suspicious use of WriteProcessMemory
      PID:2676
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\odso"
        3⤵
          PID:5016
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\odso"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          PID:3868
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\yfxheid"
          3⤵
          • Accesses Microsoft Outlook accounts
          PID:2236
        • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
          C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\aalrebwoeb"
          3⤵
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1440

    Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          logs.dat

          • Path C:\ProgramData\remcos\logs.dat
          • Size 144B
          • SHA256 18ce80d669a0a0d1717b75ed7ee5f4fb9188708c6ceebe2702f66ec50d53975d
          • MD5 SHA1 SHA512

          powershell.exe.log

          • Path C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log
          • Size 2KB
          • SHA256 6f8fd1b8d9788ad54eaeee329232187e24b7b43393a01aeba2d6e9675231fb69
          • MD5 SHA1 SHA512

          StartupProfileData-NonInteractive

          • Path C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive
          • Size 18KB
          • SHA256 52dd0b11c46c3a38fde0fd3a2621443a8424777e8561297785c86410644d4c67
          • MD5 SHA1 SHA512 SSDEEP

          __PSScriptPolicyTest_qn2okryt.gir.ps1

          • Path C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_qn2okryt.gir.ps1
          • Size 60B
          • SHA256 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7
          • MD5 SHA1 SHA512

          odso

          • Path C:\Users\Admin\AppData\Local\Temp\odso
          • Size 4KB
          • SHA256 85e5e57100dde581ff37dcd80cbe55643328aaa6518b265ceb788d21ba9d0695
          • MD5 SHA1 SHA512 SSDEEP

          tmpADB5.tmp

          • Path C:\Users\Admin\AppData\Local\Temp\tmpADB5.tmp
          • Size 1KB
          • SHA256 c58f25052b0fb93ff6caeb1003a6a7c46bdcc02ab79265444d3226e047fbbcb4
          • MD5 SHA1 SHA512

          memory/1096-18-0x0000000002F80000-0x0000000002F90000-memory.dmp

          memory/1096-147-0x0000000074510000-0x0000000074CC0000-memory.dmp

          memory/1096-81-0x000000007F6E0000-0x000000007F6F0000-memory.dmp

          memory/1096-116-0x0000000002F80000-0x0000000002F90000-memory.dmp

          memory/1096-66-0x0000000002F80000-0x0000000002F90000-memory.dmp

          memory/1096-15-0x0000000002FD0000-0x0000000003006000-memory.dmp

          memory/1096-16-0x0000000074510000-0x0000000074CC0000-memory.dmp

          memory/1096-113-0x00000000078F0000-0x0000000007993000-memory.dmp

          memory/1096-17-0x0000000005BD0000-0x00000000061F8000-memory.dmp

          memory/1096-19-0x0000000002F80000-0x0000000002F90000-memory.dmp

          memory/1096-101-0x0000000071BF0000-0x0000000071C3C000-memory.dmp

          memory/1096-135-0x0000000007EB0000-0x0000000007F46000-memory.dmp

          memory/1096-139-0x0000000007F70000-0x0000000007F8A000-memory.dmp

          memory/1096-138-0x0000000007E70000-0x0000000007E84000-memory.dmp

          memory/1096-131-0x0000000002F80000-0x0000000002F90000-memory.dmp

          memory/1096-90-0x0000000074510000-0x0000000074CC0000-memory.dmp

          memory/1096-140-0x0000000007F50000-0x0000000007F58000-memory.dmp

          memory/1096-87-0x00000000078B0000-0x00000000078E2000-memory.dmp

          memory/1096-58-0x00000000068F0000-0x000000000690E000-memory.dmp

          memory/1096-37-0x0000000006270000-0x00000000062D6000-memory.dmp

          memory/1096-56-0x0000000006450000-0x00000000067A4000-memory.dmp

          memory/1096-119-0x0000000007C30000-0x0000000007C4A000-memory.dmp

          memory/1096-40-0x00000000062E0000-0x0000000006346000-memory.dmp

          memory/1096-25-0x0000000005A20000-0x0000000005A42000-memory.dmp

          memory/1440-83-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/1440-77-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/1440-91-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/1440-117-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/1440-114-0x0000000000400000-0x0000000000424000-memory.dmp

          memory/1560-9-0x0000000002A10000-0x0000000002A1E000-memory.dmp

          memory/1560-5-0x0000000007580000-0x000000000758A000-memory.dmp

          memory/1560-30-0x0000000074510000-0x0000000074CC0000-memory.dmp

          memory/1560-27-0x0000000074510000-0x0000000074CC0000-memory.dmp

          memory/1560-6-0x000000000A070000-0x000000000A10C000-memory.dmp

          memory/1560-7-0x00000000029C0000-0x00000000029D4000-memory.dmp

          memory/1560-8-0x0000000002A00000-0x0000000002A0A000-memory.dmp

          memory/1560-10-0x000000000A770000-0x000000000A836000-memory.dmp

          memory/1560-0-0x0000000074510000-0x0000000074CC0000-memory.dmp

          memory/1560-4-0x00000000076E0000-0x00000000076F0000-memory.dmp

          memory/1560-3-0x00000000074C0000-0x0000000007552000-memory.dmp

          memory/1560-1-0x0000000000510000-0x000000000061A000-memory.dmp

          memory/1560-2-0x00000000079D0000-0x0000000007F74000-memory.dmp

          memory/2236-74-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/2236-115-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/2236-89-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/2236-82-0x0000000000400000-0x0000000000457000-memory.dmp

          memory/2676-23-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-151-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-150-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-73-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-149-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-158-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-68-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-159-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-67-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-65-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-64-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-63-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-62-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-61-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-60-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-166-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-57-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-46-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-123-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2676-38-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-45-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-127-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2676-167-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-29-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-24-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-133-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-174-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/2676-128-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2676-134-0x0000000010000000-0x0000000010019000-memory.dmp

          memory/2676-175-0x0000000000400000-0x0000000000482000-memory.dmp

          memory/3520-129-0x0000000074510000-0x0000000074CC0000-memory.dmp

          memory/3520-118-0x0000000008240000-0x00000000088BA000-memory.dmp

          memory/3520-136-0x0000000007DF0000-0x0000000007E01000-memory.dmp

          memory/3520-132-0x0000000003000000-0x0000000003010000-memory.dmp

          memory/3520-130-0x0000000007C60000-0x0000000007C6A000-memory.dmp

          memory/3520-137-0x0000000007E20000-0x0000000007E2E000-memory.dmp

          memory/3520-146-0x0000000074510000-0x0000000074CC0000-memory.dmp

          memory/3520-59-0x0000000006900000-0x000000000694C000-memory.dmp

          memory/3520-102-0x0000000006EA0000-0x0000000006EBE000-memory.dmp

          memory/3520-103-0x000000007F120000-0x000000007F130000-memory.dmp

          memory/3520-88-0x0000000071BF0000-0x0000000071C3C000-memory.dmp

          memory/3520-21-0x0000000074510000-0x0000000074CC0000-memory.dmp

          memory/3520-22-0x0000000003000000-0x0000000003010000-memory.dmp

          memory/3520-28-0x0000000003000000-0x0000000003010000-memory.dmp

          memory/3520-69-0x0000000003000000-0x0000000003010000-memory.dmp

          memory/3868-121-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/3868-70-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/3868-76-0x0000000000400000-0x0000000000478000-memory.dmp

          memory/3868-79-0x0000000000400000-0x0000000000478000-memory.dmp