Analysis

  • max time kernel
    150s
  • max time network
    151s
  • 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, 02:22

General

  • Target

    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe

  • Size

    1.0MB

  • MD5

    e5d2981fd9c531b3cfb780cf781bac91

  • SHA1

    aaf7084c369138eb5588051eda8aec9aa3c4ac26

  • SHA256

    3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b

  • SHA512

    ec10e5de423564c17caac9e3c8a4ab2d1ed51882c9cfe145374d69e9f18382d7bd23d370f0389fb56c3b77073da11351978e803dc53c7135e618bbf0507be539

  • SSDEEP

    24576:Aazz87bccsW43UyDBU7RCFYK9i3iOpOnC+yqiQDi/DtS:AOz8732BdUCYK9i3X6CPqinDo

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) 27 IoCs
  • Detects executables built or packed with MPress PE compressor 16 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 6 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 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 33 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:872
    • 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:860
    • 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:3088
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\bZurkfs" /XML "C:\Users\Admin\AppData\Local\Temp\tmpC081.tmp"
      2⤵
      • Creates scheduled task(s)
      PID:1500
    • 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:4860
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\uafwslqqjpfffjwgxr"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        PID:4336
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\xckgsdbsxxxkhqkkgcsvs"
        3⤵
        • Accesses Microsoft Outlook accounts
        PID:388
      • C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe
        C:\Users\Admin\AppData\Local\Temp\3758ece40a4e7fdefd1d742e694dc86ddbd87f1d78bafcfb48934c450630d10b.exe /stext "C:\Users\Admin\AppData\Local\Temp\hxxztvmllfpxrwgoymepdtmw"
        3⤵
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1920

Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          14412b22e5970f4f63665ad0fe2ed3cd

          SHA1

          6f95ada861f022f59096a654c090b6a51003c010

          SHA256

          d36d7ff567900f29d39d3d3ddb3e17bd7cc6ff01a8c1a134fb62d1834e84d4ba

          SHA512

          05b1dff991c337e12d03bcd117c9fe0e57f67c192ee016e1e6e06488861a66c6ec80910743817c246a37f275c331084d396252e825f728ed6e1ad145254c0c59

        • C:\Users\Admin\AppData\Local\Microsoft\CLR_v4.0_32\UsageLogs\powershell.exe.log

          Filesize

          2KB

          MD5

          968cb9309758126772781b83adb8a28f

          SHA1

          8da30e71accf186b2ba11da1797cf67f8f78b47c

          SHA256

          92099c10776bb7e3f2a8d1b82d4d40d0c4627e4f1bf754a6e58dfd2c2e97042a

          SHA512

          4bd50732f8af4d688d95999bddfd296115d7033ddc38f86c9fb1f47fde202bffa27e9088bebcaa3064ca946af2f5c1ca6cbde49d0907f0005c7ab42874515dd3

        • C:\Users\Admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive

          Filesize

          18KB

          MD5

          d4012bd485e9df454c65db40531a02b3

          SHA1

          18632549cdf0e6444e036a6033d10f808bfe0aef

          SHA256

          5dd140d6c1299f21d9cba3b4591efe44674e8ddaf8c9ddee1a51d0fab34983fe

          SHA512

          6a0af8b35849c9731fc3898040d845868642934f924a1e75e35cc4dc63d82ce498b91f545137d267e4b6f850c1cfc4f0187f073c23d1ce5441d11d015169a10e

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_mf53dh1u.dim.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

        • C:\Users\Admin\AppData\Local\Temp\tmpC081.tmp

          Filesize

          1KB

          MD5

          77786b74ef51c3db332a48760f96f694

          SHA1

          00610cfd03315b3e11c019f4b114e7262bd429ec

          SHA256

          ea9cfaafb740b4561ac7a901d6fccf0d5b638331691911483ab68e0f5e514df5

          SHA512

          7a81160e5b427c18bbb78be40220878e68c644cbc2e011496600d30450e6fcb71c14037ee5c87d42068eb6abd5457854387d03877f749df7307646be87d27097

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

          Filesize

          4KB

          MD5

          fdaa8866c905accc6ed1cb0f204b0f2c

          SHA1

          cf3a1f2d3841e3d52f3875df2bc1ff667ba8c774

          SHA256

          96db24a652541fb09e22d3dc23495c0475a4dbd2bd2dd6bb4d2aa98b1ae591ad

          SHA512

          02fae866918ca0250be91c2b85baf1a65d5cb295e6f995f0814c0a20ad1192a78f44b8a456bf1b52c9e202d523e7685157cbd2930bec483481463b7926309f2f

        • memory/388-79-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/388-73-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/388-91-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/388-84-0x0000000000400000-0x0000000000457000-memory.dmp

          Filesize

          348KB

        • memory/860-25-0x0000000006190000-0x00000000061F6000-memory.dmp

          Filesize

          408KB

        • memory/860-90-0x000000007F010000-0x000000007F020000-memory.dmp

          Filesize

          64KB

        • memory/860-16-0x00000000747D0000-0x0000000074F80000-memory.dmp

          Filesize

          7.7MB

        • memory/860-105-0x0000000075050000-0x000000007509C000-memory.dmp

          Filesize

          304KB

        • memory/860-95-0x00000000747D0000-0x0000000074F80000-memory.dmp

          Filesize

          7.7MB

        • memory/860-133-0x0000000007D00000-0x0000000007D0A000-memory.dmp

          Filesize

          40KB

        • memory/860-67-0x0000000005420000-0x0000000005430000-memory.dmp

          Filesize

          64KB

        • memory/860-21-0x0000000005420000-0x0000000005430000-memory.dmp

          Filesize

          64KB

        • memory/860-120-0x00000000082D0000-0x000000000894A000-memory.dmp

          Filesize

          6.5MB

        • memory/860-148-0x00000000747D0000-0x0000000074F80000-memory.dmp

          Filesize

          7.7MB

        • memory/860-134-0x0000000005420000-0x0000000005430000-memory.dmp

          Filesize

          64KB

        • memory/860-15-0x0000000005390000-0x00000000053C6000-memory.dmp

          Filesize

          216KB

        • memory/860-26-0x0000000006200000-0x0000000006266000-memory.dmp

          Filesize

          408KB

        • memory/872-6-0x000000000A700000-0x000000000A79C000-memory.dmp

          Filesize

          624KB

        • memory/872-2-0x0000000008110000-0x00000000086B4000-memory.dmp

          Filesize

          5.6MB

        • memory/872-8-0x00000000050E0000-0x00000000050EA000-memory.dmp

          Filesize

          40KB

        • memory/872-5-0x0000000007BA0000-0x0000000007BAA000-memory.dmp

          Filesize

          40KB

        • memory/872-50-0x00000000747D0000-0x0000000074F80000-memory.dmp

          Filesize

          7.7MB

        • memory/872-9-0x00000000050F0000-0x00000000050FE000-memory.dmp

          Filesize

          56KB

        • memory/872-4-0x0000000007E40000-0x0000000007E50000-memory.dmp

          Filesize

          64KB

        • memory/872-3-0x0000000007C00000-0x0000000007C92000-memory.dmp

          Filesize

          584KB

        • memory/872-1-0x00000000747D0000-0x0000000074F80000-memory.dmp

          Filesize

          7.7MB

        • memory/872-10-0x000000000ADF0000-0x000000000AEB6000-memory.dmp

          Filesize

          792KB

        • memory/872-22-0x00000000747D0000-0x0000000074F80000-memory.dmp

          Filesize

          7.7MB

        • memory/872-7-0x00000000050A0000-0x00000000050B4000-memory.dmp

          Filesize

          80KB

        • memory/872-0-0x0000000000BD0000-0x0000000000CDA000-memory.dmp

          Filesize

          1.0MB

        • memory/1920-76-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1920-83-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1920-86-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/1920-93-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/3088-20-0x00000000028E0000-0x00000000028F0000-memory.dmp

          Filesize

          64KB

        • memory/3088-131-0x00000000028E0000-0x00000000028F0000-memory.dmp

          Filesize

          64KB

        • memory/3088-65-0x00000000028E0000-0x00000000028F0000-memory.dmp

          Filesize

          64KB

        • memory/3088-129-0x00000000028E0000-0x00000000028F0000-memory.dmp

          Filesize

          64KB

        • memory/3088-128-0x00000000747D0000-0x0000000074F80000-memory.dmp

          Filesize

          7.7MB

        • memory/3088-135-0x0000000007760000-0x00000000077F6000-memory.dmp

          Filesize

          600KB

        • memory/3088-137-0x00000000076E0000-0x00000000076F1000-memory.dmp

          Filesize

          68KB

        • memory/3088-123-0x00000000074E0000-0x00000000074FA000-memory.dmp

          Filesize

          104KB

        • memory/3088-138-0x0000000007710000-0x000000000771E000-memory.dmp

          Filesize

          56KB

        • memory/3088-139-0x0000000007720000-0x0000000007734000-memory.dmp

          Filesize

          80KB

        • memory/3088-140-0x0000000007820000-0x000000000783A000-memory.dmp

          Filesize

          104KB

        • memory/3088-57-0x0000000006720000-0x000000000676C000-memory.dmp

          Filesize

          304KB

        • memory/3088-141-0x0000000007800000-0x0000000007808000-memory.dmp

          Filesize

          32KB

        • memory/3088-54-0x00000000061E0000-0x00000000061FE000-memory.dmp

          Filesize

          120KB

        • memory/3088-92-0x0000000007390000-0x00000000073C2000-memory.dmp

          Filesize

          200KB

        • memory/3088-147-0x00000000747D0000-0x0000000074F80000-memory.dmp

          Filesize

          7.7MB

        • memory/3088-41-0x0000000005C60000-0x0000000005FB4000-memory.dmp

          Filesize

          3.3MB

        • memory/3088-24-0x0000000005210000-0x0000000005232000-memory.dmp

          Filesize

          136KB

        • memory/3088-117-0x00000000073D0000-0x0000000007473000-memory.dmp

          Filesize

          652KB

        • memory/3088-18-0x00000000747D0000-0x0000000074F80000-memory.dmp

          Filesize

          7.7MB

        • memory/3088-94-0x0000000075050000-0x000000007509C000-memory.dmp

          Filesize

          304KB

        • memory/3088-19-0x00000000028E0000-0x00000000028F0000-memory.dmp

          Filesize

          64KB

        • memory/3088-106-0x00000000067A0000-0x00000000067BE000-memory.dmp

          Filesize

          120KB

        • memory/3088-107-0x000000007F810000-0x000000007F820000-memory.dmp

          Filesize

          64KB

        • memory/3088-17-0x0000000005530000-0x0000000005B58000-memory.dmp

          Filesize

          6.2MB

        • memory/4336-74-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/4336-71-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/4336-119-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/4336-81-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/4860-61-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-56-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-69-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-126-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4860-127-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4860-68-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-66-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-64-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-132-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4860-62-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-63-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-130-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-59-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-80-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-122-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/4860-60-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-52-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-55-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-58-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-51-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-49-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-48-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-46-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-154-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-155-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-162-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-163-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-170-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-171-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-178-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/4860-179-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB