Analysis Overview
SHA256
09f602b6abe27f0263e87422d890d282c3208d4fb7f41139dcafc9972c36dd35
Threat Level: Known bad
The file 09f602b6abe27f0263e87422d890d282c3208d4fb7f41139dcafc9972c36dd35 was found to be: Known bad.
Malicious Activity Summary
Avoslocker Ransomware
Renames multiple (133) files with added filename extension
Renames multiple (175) files with added filename extension
Sets desktop wallpaper using registry
Unsigned PE
Command and Scripting Interpreter: PowerShell
Suspicious use of AdjustPrivilegeToken
Suspicious behavior: EnumeratesProcesses
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-05-29 12:08
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-05-29 12:08
Reported
2024-05-29 12:10
Platform
win7-20231129-en
Max time kernel
119s
Max time network
120s
Command Line
Signatures
Avoslocker Ransomware
Renames multiple (175) files with added filename extension
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3627615824-4061627003-3019543961-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1377625139.png" | C:\Windows\SysWOW64\reg.exe | N/A |
Command and Scripting Interpreter: PowerShell
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\09f602b6abe27f0263e87422d890d282c3208d4fb7f41139dcafc9972c36dd35.exe
"C:\Users\Admin\AppData\Local\Temp\09f602b6abe27f0263e87422d890d282c3208d4fb7f41139dcafc9972c36dd35.exe"
C:\Windows\SysWOW64\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;"
C:\Windows\SysWOW64\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\1377625139.png /f
C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False
Network
Files
memory/2820-0-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/2820-1-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/2820-2-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/2820-6-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/2820-5-0x0000000000401000-0x00000000004B2000-memory.dmp
memory/2820-4-0x0000000000270000-0x00000000002B5000-memory.dmp
memory/2820-3-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/2820-7-0x0000000000240000-0x0000000000242000-memory.dmp
memory/2820-8-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/2820-9-0x0000000000400000-0x00000000004FF000-memory.dmp
C:\GET_YOUR_FILES_BACK.txt
| MD5 | 56d4bd7f10cb90aad3515b1ad6f6a18e |
| SHA1 | 74c6f4a6e24982584f494ad704896585ae6b3df6 |
| SHA256 | d3ae28884579358a4a420d503ec0b53b2d208c1421fc74294480fa409e5d0fc9 |
| SHA512 | 98b10c847f42c533d1ac24c8c05d7ab6d055bd608b5a52d032cbd0304cecab1f8f2e0bdaed7db7313f8de2f820f24a749debe13b512e25a91cb879e4b686848c |
memory/2820-439-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/2820-441-0x0000000000401000-0x00000000004B2000-memory.dmp
memory/2820-440-0x0000000000270000-0x00000000002B5000-memory.dmp
memory/1892-444-0x0000000074681000-0x0000000074682000-memory.dmp
memory/1892-445-0x0000000074680000-0x0000000074C2B000-memory.dmp
memory/1892-446-0x0000000074680000-0x0000000074C2B000-memory.dmp
memory/1892-447-0x0000000074680000-0x0000000074C2B000-memory.dmp
memory/1892-448-0x0000000074680000-0x0000000074C2B000-memory.dmp
memory/1892-451-0x0000000074680000-0x0000000074C2B000-memory.dmp
Analysis: behavioral2
Detonation Overview
Submitted
2024-05-29 12:08
Reported
2024-05-29 12:10
Platform
win10v2004-20240426-en
Max time kernel
93s
Max time network
95s
Command Line
Signatures
Avoslocker Ransomware
Renames multiple (133) files with added filename extension
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-3906287020-2915474608-1755617787-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1451644574.png" | C:\Windows\SysWOW64\reg.exe | N/A |
Command and Scripting Interpreter: PowerShell
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious behavior: EnumeratesProcesses
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
| N/A | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Windows\SysWOW64\WindowsPowerShell\v1.0\powershell.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\09f602b6abe27f0263e87422d890d282c3208d4fb7f41139dcafc9972c36dd35.exe
"C:\Users\Admin\AppData\Local\Temp\09f602b6abe27f0263e87422d890d282c3208d4fb7f41139dcafc9972c36dd35.exe"
C:\Windows\SysWOW64\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;"
C:\Windows\SysWOW64\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\1451644574.png /f
C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | 183.142.211.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 14.160.190.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 95.221.229.192.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 13.86.106.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 50.23.12.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 171.39.242.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 11.227.111.52.in-addr.arpa | udp |
Files
memory/3604-0-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/3604-3-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/3604-8-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/3604-7-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/3604-6-0x0000000000401000-0x00000000004B2000-memory.dmp
memory/3604-4-0x0000000002220000-0x0000000002265000-memory.dmp
memory/3604-5-0x0000000000690000-0x0000000000692000-memory.dmp
memory/3604-2-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/3604-1-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/3604-9-0x0000000000400000-0x00000000004FF000-memory.dmp
C:\Users\GET_YOUR_FILES_BACK.txt
| MD5 | 56d4bd7f10cb90aad3515b1ad6f6a18e |
| SHA1 | 74c6f4a6e24982584f494ad704896585ae6b3df6 |
| SHA256 | d3ae28884579358a4a420d503ec0b53b2d208c1421fc74294480fa409e5d0fc9 |
| SHA512 | 98b10c847f42c533d1ac24c8c05d7ab6d055bd608b5a52d032cbd0304cecab1f8f2e0bdaed7db7313f8de2f820f24a749debe13b512e25a91cb879e4b686848c |
memory/3604-395-0x0000000000401000-0x00000000004B2000-memory.dmp
memory/3604-394-0x0000000002220000-0x0000000002265000-memory.dmp
memory/3604-393-0x0000000000400000-0x00000000004FF000-memory.dmp
memory/5780-396-0x000000007458E000-0x000000007458F000-memory.dmp
memory/5780-397-0x0000000005240000-0x0000000005276000-memory.dmp
memory/5780-398-0x0000000005990000-0x0000000005FB8000-memory.dmp
memory/5780-399-0x0000000074580000-0x0000000074D30000-memory.dmp
memory/5780-400-0x0000000074580000-0x0000000074D30000-memory.dmp
memory/5780-401-0x0000000005850000-0x0000000005872000-memory.dmp
memory/5780-402-0x0000000006130000-0x0000000006196000-memory.dmp
memory/5780-403-0x0000000006210000-0x0000000006276000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_jik5dllp.2pa.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/5780-413-0x0000000006420000-0x0000000006774000-memory.dmp
memory/5780-414-0x0000000006800000-0x000000000681E000-memory.dmp
memory/5780-415-0x0000000006840000-0x000000000688C000-memory.dmp
memory/5780-417-0x0000000007E40000-0x00000000084BA000-memory.dmp
memory/5780-418-0x0000000006D50000-0x0000000006D6A000-memory.dmp
memory/5780-419-0x0000000007BD0000-0x0000000007C62000-memory.dmp
memory/5780-420-0x0000000074580000-0x0000000074D30000-memory.dmp
memory/5780-424-0x0000000074580000-0x0000000074D30000-memory.dmp