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Analysis

  • max time kernel
    149s
  • max time network
    153s
  • 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, 14:54

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 10 IoCs
  • Suspicious behavior: MapViewOfSection 3 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\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 use of WriteProcessMemory
    PID:3496
    • 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:4444
    • 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:60
    • C:\Windows\SysWOW64\schtasks.exe
      "C:\Windows\System32\schtasks.exe" /Create /TN "Updates\TkhOsslQS" /XML "C:\Users\Admin\AppData\Local\Temp\tmp43CA.tmp"
      2⤵
      • System Location Discovery: System Language Discovery
      • Scheduled Task/Job: Scheduled Task
      PID:1980
    • 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:3420
      • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
        C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\pldrfvvqmuyvnzudxfnevhztqh"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:4772
      • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
        C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\znjjxffjicqipfipgqifymtcrngdo"
        3⤵
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:2124
      • C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe
        C:\Users\Admin\AppData\Local\Temp\b4952421150265489acc51c83234643237b1f06e468c450d604210e3ee50316e.exe /stext "C:\Users\Admin\AppData\Local\Temp\jhwcyyylwkinaletpavzjzotacqmhpvi"
        3⤵
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:1512

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    6681bca530f2704b5aa325741fe45908

    SHA1

    0106a378eedf6d78c05f2dcef180b106534b66db

    SHA256

    ff392f9cb27452c651a0d81e4b66a68e5ac219ac472253cf960dc157783b1aa0

    SHA512

    fca8bd3b41c2bbb0a468f3f980ac2edbad692193d5b9aa60da79afc98786f774132b21b725db5e41496a1915163342afd9a3a3b4afd46e577dcf313998a1474c

  • 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

    909bcdf69f6f61d1c952c804e6ffb0b9

    SHA1

    4689303dec598cad13a4f5f0f937f58b65c73886

    SHA256

    50f97dc64c0825b8bcf492b4e7f947eea9aae3c0515ee9a86ae8f43f7df1818b

    SHA512

    be4cd285b10f015712e2cb699e219296d50d4c63fbfea2c88a1db48eb0d94453c3ab7274366e399120bc3227036a9f6cb58ac46d1b8b206144bd7ae077a23e62

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_smmpf1za.zek.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    4KB

    MD5

    16f4f7c4051f4bbdaa93a1ca80690065

    SHA1

    750cacbdd2d089a88119374560d6ac004954e90e

    SHA256

    6c4559e4413cccaeab73cad48ffd804506c95566e4d6a3f5ae64017a33ea6ec2

    SHA512

    cb0f68d393ad03a5c802a2978ff7b12e20911bac5e27200c2df16d5d3f63dfc2387c0cd1a9075d8e4ba9ae804a6b61225575e2f42b3ef024e863d5b172417964

  • C:\Users\Admin\AppData\Local\Temp\tmp43CA.tmp

    Filesize

    1KB

    MD5

    4f4dba2f04e932443db7b4c227a8da53

    SHA1

    568d96df04b4203f7c6acbed7f3028dc427059eb

    SHA256

    ce05e9c56ef1f06a4c89e260cf792eb259f9ee2f8cd677c3dbf4f6a75290f40f

    SHA512

    7c5d1f841e8ce284933d51e45e1f18bff3bdfc11cdc567ec9e0297f6bb10bfc502bc101425276d3361cc820223e04740e41ef1277dd8e32f1bc9726dbcd0bdad

  • memory/60-108-0x0000000007260000-0x000000000726E000-memory.dmp

    Filesize

    56KB

  • memory/60-58-0x0000000006280000-0x00000000062CC000-memory.dmp

    Filesize

    304KB

  • memory/60-124-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/60-106-0x0000000007230000-0x0000000007241000-memory.dmp

    Filesize

    68KB

  • memory/60-105-0x00000000072B0000-0x0000000007346000-memory.dmp

    Filesize

    600KB

  • memory/60-91-0x0000000007030000-0x000000000704A000-memory.dmp

    Filesize

    104KB

  • memory/60-57-0x0000000005BF0000-0x0000000005C0E000-memory.dmp

    Filesize

    120KB

  • memory/60-89-0x0000000006F00000-0x0000000006FA3000-memory.dmp

    Filesize

    652KB

  • memory/60-88-0x00000000062F0000-0x000000000630E000-memory.dmp

    Filesize

    120KB

  • memory/60-67-0x0000000006CC0000-0x0000000006CF2000-memory.dmp

    Filesize

    200KB

  • memory/60-68-0x0000000075510000-0x000000007555C000-memory.dmp

    Filesize

    304KB

  • memory/60-48-0x0000000005810000-0x0000000005B64000-memory.dmp

    Filesize

    3.3MB

  • memory/60-104-0x00000000070A0000-0x00000000070AA000-memory.dmp

    Filesize

    40KB

  • memory/60-23-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/60-25-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/60-90-0x0000000007670000-0x0000000007CEA000-memory.dmp

    Filesize

    6.5MB

  • memory/1512-96-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1512-100-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/1512-99-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/2124-93-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2124-98-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/2124-95-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/3420-64-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-117-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/3420-149-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-148-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-141-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-56-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-54-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-59-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-60-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-62-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-61-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-63-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-49-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-47-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-140-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-133-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-132-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-120-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-116-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/3420-51-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3420-113-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/3496-6-0x0000000004E60000-0x0000000004EFC000-memory.dmp

    Filesize

    624KB

  • memory/3496-55-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/3496-5-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/3496-7-0x00000000063F0000-0x00000000064D8000-memory.dmp

    Filesize

    928KB

  • memory/3496-13-0x0000000005FD0000-0x0000000006090000-memory.dmp

    Filesize

    768KB

  • memory/3496-1-0x00000000000D0000-0x00000000001CA000-memory.dmp

    Filesize

    1000KB

  • memory/3496-12-0x0000000005F70000-0x0000000005F80000-memory.dmp

    Filesize

    64KB

  • memory/3496-2-0x00000000051D0000-0x0000000005774000-memory.dmp

    Filesize

    5.6MB

  • memory/3496-11-0x0000000005F60000-0x0000000005F6C000-memory.dmp

    Filesize

    48KB

  • memory/3496-10-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/3496-9-0x0000000074C8E000-0x0000000074C8F000-memory.dmp

    Filesize

    4KB

  • memory/3496-0-0x0000000074C8E000-0x0000000074C8F000-memory.dmp

    Filesize

    4KB

  • memory/3496-8-0x0000000006500000-0x000000000651A000-memory.dmp

    Filesize

    104KB

  • memory/3496-3-0x0000000004C20000-0x0000000004CB2000-memory.dmp

    Filesize

    584KB

  • memory/3496-4-0x0000000004BD0000-0x0000000004BDA000-memory.dmp

    Filesize

    40KB

  • memory/4444-111-0x0000000007B10000-0x0000000007B18000-memory.dmp

    Filesize

    32KB

  • memory/4444-28-0x0000000005EC0000-0x0000000005F26000-memory.dmp

    Filesize

    408KB

  • memory/4444-22-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/4444-21-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/4444-110-0x0000000007B30000-0x0000000007B4A000-memory.dmp

    Filesize

    104KB

  • memory/4444-109-0x0000000007A30000-0x0000000007A44000-memory.dmp

    Filesize

    80KB

  • memory/4444-74-0x0000000075510000-0x000000007555C000-memory.dmp

    Filesize

    304KB

  • memory/4444-26-0x0000000005DE0000-0x0000000005E46000-memory.dmp

    Filesize

    408KB

  • memory/4444-125-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/4444-24-0x0000000005D40000-0x0000000005D62000-memory.dmp

    Filesize

    136KB

  • memory/4444-18-0x0000000004F30000-0x0000000004F66000-memory.dmp

    Filesize

    216KB

  • memory/4444-19-0x0000000074C80000-0x0000000075430000-memory.dmp

    Filesize

    7.7MB

  • memory/4444-20-0x0000000005710000-0x0000000005D38000-memory.dmp

    Filesize

    6.2MB

  • memory/4772-97-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4772-92-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/4772-94-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB