Analysis

  • max time kernel
    150s
  • max time network
    141s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    12-08-2024 13:08

General

  • Target

    01_extracted.exe

  • Size

    1.3MB

  • MD5

    02e47dfd1294ce31f13dba280c0a67b5

  • SHA1

    6abb28614be7035275e5bd3a3f37e0d5a733c083

  • SHA256

    248653074d88fac18a59e758a14fac1c0dcb8af24f32b17a43a15222cf93576e

  • SHA512

    7653d7e6d15597b39435bc91b722bb01d49775b3cac42e7d48dec8a708fb993587955877045adb799fe7a544b42f22ac6b2af60aef7c56936a5ee93132ee5fa4

  • SSDEEP

    24576:0qDEvCTbMWu7rQYlBQcBiT6rprG8aR1qE5nfd3oSGnVm+Wf:0TvC/MTQYxsWR7aRVSS+I+

Malware Config

Extracted

Family

remcos

Botnet

RemoteHost

C2

ocservice.duckdns.org:6622

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

    evferf

  • mouse_option

    false

  • mutex

    Rmc-5U6QT9

  • 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 6 IoCs

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

  • NirSoft MailPassView 2 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 3 IoCs

    Password recovery tool for various web browsers

  • Drops startup file 1 IoCs
  • Executes dropped EXE 6 IoCs
  • 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
  • AutoIT Executable 1 IoCs

    AutoIT scripts compiled to PE executables.

  • Suspicious use of SetThreadContext 3 IoCs
  • System Location Discovery: System Language Discovery 1 TTPs 5 IoCs

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

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 1 IoCs
  • Suspicious use of FindShellTrayWindow 5 IoCs
  • Suspicious use of SendNotifyMessage 5 IoCs
  • Suspicious use of WriteProcessMemory 21 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\01_extracted.exe
    "C:\Users\Admin\AppData\Local\Temp\01_extracted.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of FindShellTrayWindow
    • Suspicious use of SendNotifyMessage
    • Suspicious use of WriteProcessMemory
    PID:1300
    • C:\Users\Admin\AppData\Local\directory\name.exe
      "C:\Users\Admin\AppData\Local\Temp\01_extracted.exe"
      2⤵
      • Drops startup file
      • Executes dropped EXE
      • Suspicious use of SetThreadContext
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: MapViewOfSection
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of SendNotifyMessage
      • Suspicious use of WriteProcessMemory
      PID:3508
      • C:\Users\Admin\AppData\Local\directory\name.exe
        C:\Users\Admin\AppData\Local\directory\name.exe /stext "C:\Users\Admin\AppData\Local\Temp\olarcmblioimczgsvoinedqtmdivmxdfe"
        3⤵
        • Executes dropped EXE
        PID:3860
      • C:\Users\Admin\AppData\Local\directory\name.exe
        C:\Users\Admin\AppData\Local\directory\name.exe /stext "C:\Users\Admin\AppData\Local\Temp\olarcmblioimczgsvoinedqtmdivmxdfe"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        PID:3496
      • C:\Users\Admin\AppData\Local\directory\name.exe
        C:\Users\Admin\AppData\Local\directory\name.exe /stext "C:\Users\Admin\AppData\Local\Temp\znfjd"
        3⤵
        • Executes dropped EXE
        PID:848
      • C:\Users\Admin\AppData\Local\directory\name.exe
        C:\Users\Admin\AppData\Local\directory\name.exe /stext "C:\Users\Admin\AppData\Local\Temp\znfjd"
        3⤵
        • Executes dropped EXE
        • Accesses Microsoft Outlook accounts
        • System Location Discovery: System Language Discovery
        PID:1760
      • C:\Users\Admin\AppData\Local\directory\name.exe
        C:\Users\Admin\AppData\Local\directory\name.exe /stext "C:\Users\Admin\AppData\Local\Temp\bhkcexwhs"
        3⤵
        • Executes dropped EXE
        • System Location Discovery: System Language Discovery
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:636
  • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
    "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --field-trial-handle=4460,i,4174666705242427184,7333705955694532165,262144 --variations-seed-version --mojo-platform-channel-handle=4100 /prefetch:8
    1⤵
      PID:1896

    Network

    MITRE ATT&CK Enterprise v15

    Replay Monitor

    Loading Replay Monitor...

    Downloads

    • C:\ProgramData\evferf\logs.dat

      Filesize

      208B

      MD5

      03b607a9984666fd0f49017906df7500

      SHA1

      890f4c35b2d8f044d6a778e75c68a22699eed998

      SHA256

      565b253b46d4e13a7787444b15857960b5164a6a9a451df8ee704c1838a46089

      SHA512

      3f9f78b559584a3b4bdd0fa79a46e41091b97f339060b8e4a7495a8225eb853bd63114dfa14b6cc0884ad84cd49fa36fa96d232e190fe64f3858d18f02252cda

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

      Filesize

      4KB

      MD5

      cda83eba5a004554ccdc061fd3df499c

      SHA1

      58ff2ecb9d47be10335e104896c87c62dc328523

      SHA256

      e384f4d46587646c6e0f9d2ee90b7bc57b49cea936b37cf8ab81ef3c4ce468ac

      SHA512

      f55ce20f0cf8b603fad765b889607f967c22d377fa4ac417ba1309d0aced9231e197bb4107d1c92bb99f51c04cc68ce26148727a8b694886710100c01f3de597

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

      Filesize

      28KB

      MD5

      2db633ef207ce985b162d92227536918

      SHA1

      b53e198fb389c983a7e0b837fa99536ddac13646

      SHA256

      7bca6a34219cc289b128c4174ffb785418e39b6551195992ae417a26ec1cc0bc

      SHA512

      7000468102c0a1aaee4c31eddfbb6dcd91fd184d731d37603f2e866890ae643ea97e616c25cafdfd0b40a46f3eb47a279878cf72e70d982d90d4b954b7064476

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

      MD5

      d41d8cd98f00b204e9800998ecf8427e

      SHA1

      da39a3ee5e6b4b0d3255bfef95601890afd80709

      SHA256

      e3b0c44298fc1c149afbf4c8996fb92427ae41e4649b934ca495991b7852b855

      SHA512

      cf83e1357eefb8bdf1542850d66d8007d620e4050b5715dc83f4a921d36ce9ce47d0d13c5d85f2b0ff8318d2877eec2f63b931bd47417a81a538327af927da3e

    • C:\Users\Admin\AppData\Local\directory\name.exe

      Filesize

      1.3MB

      MD5

      02e47dfd1294ce31f13dba280c0a67b5

      SHA1

      6abb28614be7035275e5bd3a3f37e0d5a733c083

      SHA256

      248653074d88fac18a59e758a14fac1c0dcb8af24f32b17a43a15222cf93576e

      SHA512

      7653d7e6d15597b39435bc91b722bb01d49775b3cac42e7d48dec8a708fb993587955877045adb799fe7a544b42f22ac6b2af60aef7c56936a5ee93132ee5fa4

    • memory/636-63-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/636-62-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/636-60-0x0000000000400000-0x0000000000424000-memory.dmp

      Filesize

      144KB

    • memory/1300-11-0x0000000000AC0000-0x0000000000AC4000-memory.dmp

      Filesize

      16KB

    • memory/1760-57-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/1760-59-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/1760-65-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/1760-54-0x0000000000400000-0x0000000000462000-memory.dmp

      Filesize

      392KB

    • memory/3496-53-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3496-58-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3496-49-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3496-76-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3496-64-0x0000000000400000-0x0000000000478000-memory.dmp

      Filesize

      480KB

    • memory/3508-39-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-82-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/3508-44-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-43-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-40-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-41-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-38-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-37-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-36-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-35-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-32-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-31-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-78-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/3508-47-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-81-0x0000000010000000-0x0000000010019000-memory.dmp

      Filesize

      100KB

    • memory/3508-83-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-87-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-88-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-90-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-30-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-96-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-97-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-105-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-104-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-112-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-113-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-120-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB

    • memory/3508-121-0x0000000000400000-0x0000000000482000-memory.dmp

      Filesize

      520KB