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Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/09/2024, 12:26

General

  • Target

    b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe

  • Size

    991KB

  • MD5

    4839930b3f7915602fd40251b76bb9c5

  • SHA1

    fe3a9de406d44c6a9aa5a6ad1fede58f6a0e413f

  • SHA256

    b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e

  • SHA512

    54b4b3ba92406fb1417eda6366cc4806f10dfae1233cb009c697a8b95f990bd497a7e50140f48406566e16dedf0a62a0f71f25d862d1113a92d6277cacf5016f

  • SSDEEP

    12288:vdZshZWHXnhEE8tpUEx1I94L+R49xIUBZjlP4JH0Y6QC4zmEs0mwF0WOs5HvrWZO:vzshZEXw7jIS6RuXGUDQFDMEKW4THM00

Malware Config

Extracted

Family

remcos

Botnet

Aug 23C

C2

method8888.ddns.net:6902

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-RCNGU6

  • 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.

  • Credentials from Password Stores: Credentials from Web Browsers 1 TTPs

    Malicious Access or copy of Web Browser Credential store.

  • Detected Nirsoft tools 3 IoCs

    Free utilities often used by attackers which can steal passwords, product keys, etc.

  • NirSoft MailPassView 1 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 1 IoCs

    Password recovery tool for various web browsers

  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

  • 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).

  • System Location Discovery: System Language Discovery 1 TTPs 8 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

  • Scheduled Task/Job: Scheduled Task 1 TTPs 1 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 12 IoCs
  • Suspicious behavior: MapViewOfSection 3 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\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
    "C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious behavior: EnumeratesProcesses
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:2000
    • 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\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1092
    • C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" Add-MpPreference -ExclusionPath "C:\Users\Admin\AppData\Roaming\TkhOsslQS.exe"
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      PID:1400
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TkhOsslQS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp4D40.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:3704
    • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
      "C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe"
      2⤵
        PID:244
      • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
        "C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe"
        2⤵
        • Suspicious use of SetThreadContext
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: MapViewOfSection
        • Suspicious use of SetWindowsHookEx
        • Suspicious use of WriteProcessMemory
        PID:2580
        • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
          C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\wguxuuyhrrylkwiupgjwl"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          PID:4036
        • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
          C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\yazpumjbnzqymdegzrwyogha"
          3⤵
          • Accesses Microsoft Outlook accounts
          • System Location Discovery: System Language Discovery
          PID:544
        • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
          C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\icfavetcbhicwjskqcrzzturatuq"
          3⤵
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:4312

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

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    Downloads

    • C:\ProgramData\remcos\logs.dat

      Filesize

      144B

      MD5

      9d54600b1c6f229a1d19ea18bf3af53c

      SHA1

      9291dbf8b7cb0b9f5d2fd6318afd077c0b39ac2b

      SHA256

      da903a1b7093329e241ef87a187bbde9b5dff8bdadd1c3c96e856e6bb7cbb36e

      SHA512

      28de633a80612212511a85fdda26dcbac565773d89fdd82b358b03a0bcceb0d81f241ecc0ed24b1a7323d0014a754cca707f1095b11841e73e7e7ee54f1bc04a

    • 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

      005227eb74917e27f5063ca27d9d2c14

      SHA1

      11f455b6086d45535913544f5e0fec258e189a96

      SHA256

      b62e40835e63bc4c156580354530d2bc93f98be121f4ff035d64c6094f221aa6

      SHA512

      7e34655118fceddb2d6373f5938ca54995acd0d6657cf826fa1125a2fe7c9a4f93479b6db5daf618aaeb370efe624a72fe9db41c3d31f75766029932da1d421b

    • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_5gwxm0np.tv3.ps1

      Filesize

      60B

      MD5

      d17fe0a3f47be24a6453e9ef58c94641

      SHA1

      6ab83620379fc69f80c0242105ddffd7d98d5d9d

      SHA256

      96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

      SHA512

      5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

    • C:\Users\Admin\AppData\Local\Temp\tmp4D40.tmp

      Filesize

      1KB

      MD5

      4f4dba2f04e932443db7b4c227a8da53

      SHA1

      568d96df04b4203f7c6acbed7f3028dc427059eb

      SHA256

      ce05e9c56ef1f06a4c89e260cf792eb259f9ee2f8cd677c3dbf4f6a75290f40f

      SHA512

      7c5d1f841e8ce284933d51e45e1f18bff3bdfc11cdc567ec9e0297f6bb10bfc502bc101425276d3361cc820223e04740e41ef1277dd8e32f1bc9726dbcd0bdad

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

      Filesize

      4KB

      MD5

      16f4f7c4051f4bbdaa93a1ca80690065

      SHA1

      750cacbdd2d089a88119374560d6ac004954e90e

      SHA256

      6c4559e4413cccaeab73cad48ffd804506c95566e4d6a3f5ae64017a33ea6ec2

      SHA512

      cb0f68d393ad03a5c802a2978ff7b12e20911bac5e27200c2df16d5d3f63dfc2387c0cd1a9075d8e4ba9ae804a6b61225575e2f42b3ef024e863d5b172417964

    • memory/544-84-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/544-82-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/544-81-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/1092-59-0x00000000064F0000-0x000000000653C000-memory.dmp

      Filesize

      304KB

    • memory/1092-30-0x0000000005F00000-0x0000000006254000-memory.dmp

      Filesize

      3.3MB

    • memory/1092-85-0x000000006F440000-0x000000006F48C000-memory.dmp

      Filesize

      304KB

    • memory/1092-57-0x00000000064C0000-0x00000000064DE000-memory.dmp

      Filesize

      120KB

    • memory/1092-98-0x0000000007E30000-0x00000000084AA000-memory.dmp

      Filesize

      6.5MB

    • memory/1092-18-0x0000000002BC0000-0x0000000002BF6000-memory.dmp

      Filesize

      216KB

    • memory/1092-19-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/1092-21-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/1092-20-0x00000000056B0000-0x0000000005CD8000-memory.dmp

      Filesize

      6.2MB

    • memory/1092-22-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/1092-99-0x00000000077E0000-0x00000000077FA000-memory.dmp

      Filesize

      104KB

    • memory/1092-123-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/1400-107-0x00000000077F0000-0x00000000077FE000-memory.dmp

      Filesize

      56KB

    • memory/1400-104-0x0000000007840000-0x00000000078D6000-memory.dmp

      Filesize

      600KB

    • memory/1400-26-0x0000000005B00000-0x0000000005B22000-memory.dmp

      Filesize

      136KB

    • memory/1400-28-0x0000000005C10000-0x0000000005C76000-memory.dmp

      Filesize

      408KB

    • memory/1400-29-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/1400-25-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/1400-79-0x0000000007460000-0x0000000007503000-memory.dmp

      Filesize

      652KB

    • memory/1400-124-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/1400-103-0x0000000007630000-0x000000000763A000-memory.dmp

      Filesize

      40KB

    • memory/1400-109-0x0000000007900000-0x000000000791A000-memory.dmp

      Filesize

      104KB

    • memory/1400-105-0x00000000077C0000-0x00000000077D1000-memory.dmp

      Filesize

      68KB

    • memory/1400-23-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/1400-66-0x0000000007410000-0x0000000007442000-memory.dmp

      Filesize

      200KB

    • memory/1400-67-0x000000006F440000-0x000000006F48C000-memory.dmp

      Filesize

      304KB

    • memory/1400-77-0x00000000073F0000-0x000000000740E000-memory.dmp

      Filesize

      120KB

    • memory/1400-108-0x0000000007800000-0x0000000007814000-memory.dmp

      Filesize

      80KB

    • memory/1400-27-0x0000000005BA0000-0x0000000005C06000-memory.dmp

      Filesize

      408KB

    • memory/1400-110-0x00000000078E0000-0x00000000078E8000-memory.dmp

      Filesize

      32KB

    • memory/2000-3-0x0000000005910000-0x00000000059A2000-memory.dmp

      Filesize

      584KB

    • memory/2000-6-0x0000000005BB0000-0x0000000005C4C000-memory.dmp

      Filesize

      624KB

    • memory/2000-12-0x0000000005DC0000-0x0000000005DD0000-memory.dmp

      Filesize

      64KB

    • memory/2000-0-0x0000000074B1E000-0x0000000074B1F000-memory.dmp

      Filesize

      4KB

    • memory/2000-58-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/2000-13-0x0000000006D70000-0x0000000006E30000-memory.dmp

      Filesize

      768KB

    • memory/2000-4-0x0000000005880000-0x000000000588A000-memory.dmp

      Filesize

      40KB

    • memory/2000-11-0x0000000005DB0000-0x0000000005DBC000-memory.dmp

      Filesize

      48KB

    • memory/2000-5-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/2000-2-0x0000000005E20000-0x00000000063C4000-memory.dmp

      Filesize

      5.6MB

    • memory/2000-1-0x0000000000D70000-0x0000000000E6A000-memory.dmp

      Filesize

      1000KB

    • memory/2000-10-0x0000000074B10000-0x00000000752C0000-memory.dmp

      Filesize

      7.7MB

    • memory/2000-9-0x0000000074B1E000-0x0000000074B1F000-memory.dmp

      Filesize

      4KB

    • memory/2000-8-0x0000000005D90000-0x0000000005DAA000-memory.dmp

      Filesize

      104KB

    • memory/2000-7-0x0000000007140000-0x0000000007228000-memory.dmp

      Filesize

      928KB

    • memory/2580-60-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-116-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2580-152-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-151-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-142-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-143-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-136-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-65-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-62-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-63-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-112-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2580-61-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-117-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-135-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-115-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/2580-51-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-48-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-56-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-46-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-127-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-128-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/2580-41-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/4036-80-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4036-78-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4036-83-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/4312-97-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/4312-96-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/4312-95-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB