Analysis

  • max time kernel
    151s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    02/05/2024, 02:20

General

  • Target

    f3050a3a335d79e31e55dcc7da2da1a672593433058cbb3e325dde599cc11b1c.exe

  • Size

    3.6MB

  • MD5

    cf7bc3c744eedf62ec6452c1ab170b51

  • SHA1

    d1b669631370863da9ac7b01bc3881ff4b506f18

  • SHA256

    f3050a3a335d79e31e55dcc7da2da1a672593433058cbb3e325dde599cc11b1c

  • SHA512

    141ec775ef5676144f8b7470cd08795589e1eb67031ed8235a846013014028747b1a8d0ade054a6b2db200b8d6a30d55d4c651943b4b2471eda5a6ee4a91ed61

  • SSDEEP

    49152:lp98Mq2HVhvxG9I1EBn1SdaVY6kqjpr33J7cXdn7jc7QBip7aF2M2/j8e3KEggFm:lR1h2qaVnkM3eeQY2Fgxt++IY404

Malware Config

Extracted

Family

remcos

Botnet

RDEC

C2

64.188.18.137:1604

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-VI2QU3

  • 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) 25 IoCs
  • Detects executables built or packed with MPress PE compressor 18 IoCs
  • Detects executables packed with or use KoiVM 1 IoCs
  • Detects executables referencing many confidential data stores found in browsers, mail clients, cryptocurreny wallets, etc. Observed in information stealers 3 IoCs
  • Detects executables referencing many email and collaboration clients. Observed in information stealers 3 IoCs
  • NirSoft MailPassView 3 IoCs

    Password recovery tool for various email clients

  • NirSoft WebBrowserPassView 2 IoCs

    Password recovery tool for various web browsers

  • Nirsoft 8 IoCs
  • Uses the VBS compiler for execution 1 TTPs
  • Accesses Microsoft Outlook accounts 1 TTPs 1 IoCs
  • Suspicious use of SetThreadContext 4 IoCs
  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs
  • Suspicious use of WriteProcessMemory 50 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f3050a3a335d79e31e55dcc7da2da1a672593433058cbb3e325dde599cc11b1c.exe
    "C:\Users\Admin\AppData\Local\Temp\f3050a3a335d79e31e55dcc7da2da1a672593433058cbb3e325dde599cc11b1c.exe"
    1⤵
    • Suspicious use of SetThreadContext
    • Suspicious use of AdjustPrivilegeToken
    • Suspicious use of WriteProcessMemory
    PID:3248
    • C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe
      "C:\Windows\Microsoft.NET\Framework\v4.0.30319\vbc.exe"
      2⤵
        PID:4484
      • C:\Windows\System32\cmd.exe
        "C:\Windows\System32\cmd.exe"
        2⤵
          PID:376
        • C:\Windows\System32\calc.exe
          "C:\Windows\System32\calc.exe"
          2⤵
            PID:3928
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe"
            2⤵
            • Suspicious use of SetThreadContext
            • Suspicious behavior: MapViewOfSection
            • Suspicious use of WriteProcessMemory
            PID:2260
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
              C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe /stext "C:\Users\Admin\AppData\Local\Temp\nkhnjrhpuzzwzinhyqljujv"
              3⤵
              • Suspicious behavior: EnumeratesProcesses
              PID:4744
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
              C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe /stext "C:\Users\Admin\AppData\Local\Temp\xfufjksjqhrbjxclpbydxwpvwm"
              3⤵
              • Accesses Microsoft Outlook accounts
              PID:1196
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
              C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe /stext "C:\Users\Admin\AppData\Local\Temp\ahaykclkepjgldypymleibkexsyvy"
              3⤵
              • Suspicious behavior: EnumeratesProcesses
              • Suspicious use of AdjustPrivilegeToken
              PID:2304
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe
            "C:\Windows\Microsoft.NET\Framework\v4.0.30319\ngen.exe"
            2⤵
              PID:3324
          • 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 --no-appcompat-clear --mojo-platform-channel-handle=1044 --field-trial-handle=2280,i,4114443225282860369,4764091921472631035,262144 --variations-seed-version /prefetch:8
            1⤵
              PID:4504

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

            Loading Replay Monitor...

            Downloads

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

              Filesize

              4KB

              MD5

              10fa8ec140c204486092fb161e567ec7

              SHA1

              4d63e1f8df3afefedb19df73d7ee5f3b1e7b6473

              SHA256

              7176ca3d0196ec46f178107fdb587adaef3f6ea65daa80eccd2371a515880e04

              SHA512

              9db4eeb3f07d8d0579f75f3426c91156809152d8c1a37c9a27bf159888f6dd97f1212ac80f5bbb17e4d86f3087c512ccba2ca50a2db07d071370bd36364e1f76

            • memory/1196-20-0x0000000000400000-0x0000000000462000-memory.dmp

              Filesize

              392KB

            • memory/1196-39-0x0000000000400000-0x0000000000462000-memory.dmp

              Filesize

              392KB

            • memory/1196-27-0x0000000000400000-0x0000000000462000-memory.dmp

              Filesize

              392KB

            • memory/1196-29-0x0000000000400000-0x0000000000462000-memory.dmp

              Filesize

              392KB

            • memory/1196-26-0x0000000000400000-0x0000000000462000-memory.dmp

              Filesize

              392KB

            • memory/2260-53-0x0000000010000000-0x0000000010019000-memory.dmp

              Filesize

              100KB

            • memory/2260-52-0x0000000010000000-0x0000000010019000-memory.dmp

              Filesize

              100KB

            • memory/2260-8-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-9-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-10-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-11-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-12-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-14-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-13-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-15-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-65-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-17-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-64-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-6-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-63-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-5-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-62-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-61-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-60-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-59-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-58-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-57-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-55-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-56-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-34-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-54-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-7-0x0000000000400000-0x0000000000482000-memory.dmp

              Filesize

              520KB

            • memory/2260-49-0x0000000010000000-0x0000000010019000-memory.dmp

              Filesize

              100KB

            • memory/2304-30-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/2304-28-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/2304-22-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/2304-25-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/2304-38-0x0000000000400000-0x0000000000424000-memory.dmp

              Filesize

              144KB

            • memory/3248-4-0x000001AFB5260000-0x000001AFB5334000-memory.dmp

              Filesize

              848KB

            • memory/3248-1-0x000001AFB3290000-0x000001AFB356A000-memory.dmp

              Filesize

              2.9MB

            • memory/3248-3-0x000001AFCDB30000-0x000001AFCDE0A000-memory.dmp

              Filesize

              2.9MB

            • memory/3248-2-0x00007FFD3FDC0000-0x00007FFD40881000-memory.dmp

              Filesize

              10.8MB

            • memory/3248-0-0x00007FFD3FDC3000-0x00007FFD3FDC5000-memory.dmp

              Filesize

              8KB

            • memory/3248-16-0x00007FFD3FDC0000-0x00007FFD40881000-memory.dmp

              Filesize

              10.8MB

            • memory/4744-47-0x0000000000400000-0x0000000000478000-memory.dmp

              Filesize

              480KB

            • memory/4744-31-0x0000000000400000-0x0000000000478000-memory.dmp

              Filesize

              480KB

            • memory/4744-32-0x0000000000400000-0x0000000000478000-memory.dmp

              Filesize

              480KB

            • memory/4744-24-0x0000000000400000-0x0000000000478000-memory.dmp

              Filesize

              480KB

            • memory/4744-18-0x0000000000400000-0x0000000000478000-memory.dmp

              Filesize

              480KB