Overview

overview

10

Static

static

SayLessRnm Window.exe

windows7_x64

10

SayLessRnm Window.exe

windows10_x64

10

Resubmissions

09/10/2021, 11:33

211009-nn4ypsfcbm10

09/10/2021, 06:21

211009-g4aw8sfae610

Analysis

  • max time kernel
    119s
  • max time network
    118s
  • platform
    windows10_x64
  • resource
    win10-en-20210920
  • submitted
    09/10/2021, 11:33

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General

  • Target
    SayLessRnm Window.exe
  • Size 557KB
  • Sample211009-nn4ypsfcbm
  • SHA256 a6339f9ef7c91bc792626ff3765a46809dcada083c93a7e63fd01b0e91c1bb90
  • MD5 SHA1 SHA512
Score
10/10
ransomware

Malware Config

Extracted

Path

  • C:\Users\Admin\Desktop\SAYLESS-RANSOMWARE.saylessrsnm.txt

Ransom Note
  • Your computer has been infected by SayLess-Ransomware. All your data and files have been encrypted with a MILITARY-GRADE LEVEL ENCRYPTION. To unlock them, send 500$ to the BTC adress below to get decryption key and restore your data... Or else your files are lost! DO NOT TURN OFF YOUR PC, IF YOU SO ALL YOUR FILES WILL BE CORRUPTED FOREVER. Encryption Log: ==================================== C:\Users\Admin\Desktop\BlockRepair.ico C:\Users\Admin\Desktop\CloseConfirm.wmf C:\Users\Admin\Desktop\desktop.ini C:\Users\Admin\Desktop\DisableConfirm.mpg C:\Users\Admin\Desktop\DisconnectCompare.wmx C:\Users\Admin\Desktop\GrantOut.wav C:\Users\Admin\Desktop\GroupBackup.xlsm C:\Users\Admin\Desktop\GroupImport.rar C:\Users\Admin\Desktop\InitializeSkip.xltm C:\Users\Admin\Desktop\InstallRemove.ini C:\Users\Admin\Desktop\OptimizeUndo.xltx C:\Users\Admin\Desktop\OutFind.midi C:\Users\Admin\Desktop\PopRevoke.mht C:\Users\Admin\Desktop\RemoveExpand.TS C:\Users\Admin\Desktop\RenamePush.sys C:\Users\Admin\Desktop\RequestUnlock.dxf C:\Users\Admin\Desktop\RestartApprove.kix C:\Users\Admin\Desktop\SaveEnable.mpe C:\Users\Admin\Desktop\SelectWait.jpe C:\Users\Admin\Desktop\UndoConvertFrom.tif C:\Users\Admin\Desktop\UnregisterConvertTo.M2V C:\Users\Admin\Desktop\UnregisterExpand.potx C:\Users\Admin\Desktop\UpdateRemove.png C:\Users\Admin\Pictures\BackupReset.svgz C:\Users\Admin\Pictures\ClearRedo.dwg C:\Users\Admin\Pictures\desktop.ini C:\Users\Admin\Pictures\FormatGrant.jpg C:\Users\Admin\Pictures\GroupClear.emf C:\Users\Admin\Pictures\PushSend.tiff C:\Users\Admin\Pictures\ReadResume.jpeg C:\Users\Admin\Pictures\ReadWatch.dxf C:\Users\Admin\Pictures\ResizeMove.cr2 C:\Users\Admin\Pictures\SuspendProtect.tif C:\Users\Admin\Pictures\UndoUpdate.dxf C:\Users\Admin\Pictures\Wallpaper.jpg C:\Users\Admin\Pictures\Camera Roll\desktop.ini C:\Users\Admin\Pictures\Saved Pictures\desktop.ini C:\Users\Admin\Documents\ApproveWrite.vsx C:\Users\Admin\Documents\Are.docx C:\Users\Admin\Documents\AssertRegister.vstm C:\Users\Admin\Documents\ClearRepair.vdw C:\Users\Admin\Documents\CloseSuspend.pub C:\Users\Admin\Documents\CompareRevoke.vsw C:\Users\Admin\Documents\ConfirmSelect.mht C:\Users\Admin\Documents\ConvertGrant.vstx C:\Users\Admin\Documents\DebugLimit.docx C:\Users\Admin\Documents\DebugMove.potx C:\Users\Admin\Documents\DebugWait.ppsm C:\Users\Admin\Documents\desktop.ini C:\Users\Admin\Documents\DisconnectStop.xlt C:\Users\Admin\Documents\EditGroup.pub C:\Users\Admin\Documents\EditStep.docm C:\Users\Admin\Documents\EnterResize.html C:\Users\Admin\Documents\ExpandInstall.potm C:\Users\Admin\Documents\Files.docx C:\Users\Admin\Documents\FormatShow.mht C:\Users\Admin\Documents\FormatSubmit.odp C:\Users\Admin\Documents\GrantRequest.xml C:\Users\Admin\Documents\HideUpdate.wps C:\Users\Admin\Documents\InvokeUndo.xls C:\Users\Admin\Documents\JoinUnregister.vdx C:\Users\Admin\Documents\LockSend.html C:\Users\Admin\Documents\Opened.docx C:\Users\Admin\Documents\OutRestart.vsdm C:\Users\Admin\Documents\PopRestart.pps C:\Users\Admin\Documents\Recently.docx C:\Users\Admin\Documents\RestoreUpdate.xltx C:\Users\Admin\Documents\RevokeDismount.xps C:\Users\Admin\Documents\RevokeRequest.odt C:\Users\Admin\Documents\SendSave.pptm C:\Users\Admin\Documents\StepExport.dotm C:\Users\Admin\Documents\StepSelect.docx C:\Users\Admin\Documents\SubmitJoin.txt C:\Users\Admin\Documents\SyncUnpublish.xlsm C:\Users\Admin\Documents\These.docx C:\Users\Admin\Documents\UnlockReceive.csv C:\Users\Admin\Documents\UnprotectUndo.dotm C:\Users\Admin\Documents\UnpublishConvertTo.xlsx C:\Users\Admin\Documents\UnpublishUndo.potx C:\Users\Admin\Documents\UnregisterAdd.mhtml C:\Users\Admin\Documents\WriteConfirm.ppsx

Signatures

  • Modifies extensions of user files 3 IoCs

    Ransomware generally changes the extension on encrypted files.

    ransomware
  • Drops desktop.ini file(s) 5 IoCs
  • Suspicious use of AdjustPrivilegeToken 2 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\SayLessRnm Window.exe
    "C:\Users\Admin\AppData\Local\Temp\SayLessRnm Window.exe"
    1⤵
    • Modifies extensions of user files
    • Drops desktop.ini file(s)
    PID:3596
  • C:\Windows\SysWOW64\werfault.exe
    werfault.exe /h /shared Global\cfaad45ec5794e26bcedc1bcaec3d278 /t 3592 /p 3596
    1⤵
    • Suspicious use of AdjustPrivilegeToken
    PID:1180

Network

        MITRE ATT&CK Matrix

        Replay Monitor

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        Downloads

        memory/3596-115-0x0000000000A40000-0x0000000000A41000-memory.dmp
        Download

        memory/3596-117-0x0000000005920000-0x0000000005921000-memory.dmp
        Download

        memory/3596-118-0x00000000054C0000-0x00000000054C1000-memory.dmp
        Download

        memory/3596-119-0x0000000005420000-0x000000000591E000-memory.dmp
        Download

        memory/3596-120-0x0000000005440000-0x0000000005441000-memory.dmp
        Download

        memory/3596-121-0x0000000005420000-0x000000000591E000-memory.dmp
        Download