Analysis Overview
SHA256
a1b504b8e34200d8029f6d75491d517e460162cb9df438257ee4ed85f61c18bc
Threat Level: Known bad
The file f75e92b4cf12745c63966bb50c82e4be_JaffaCakes118 was found to be: Known bad.
Malicious Activity Summary
Avoslocker Ransomware
Renames multiple (155) files with added filename extension
Renames multiple (160) files with added filename extension
Sets desktop wallpaper using registry
Unsigned PE
Suspicious behavior: EnumeratesProcesses
Suspicious use of AdjustPrivilegeToken
Suspicious use of WriteProcessMemory
MITRE ATT&CK
Enterprise Matrix V15
Analysis: static1
Detonation Overview
Reported
2024-04-18 05:34
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-04-18 05:34
Reported
2024-04-18 05:36
Platform
win7-20240221-en
Max time kernel
119s
Max time network
120s
Command Line
Signatures
Avoslocker Ransomware
Renames multiple (160) files with added filename extension
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-2297530677-1229052932-2803917579-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1440385283.png" | C:\Windows\SysWOW64\reg.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\f75e92b4cf12745c63966bb50c82e4be_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f75e92b4cf12745c63966bb50c82e4be_JaffaCakes118.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\1440385283.png /f
C:\Windows\SysWOW64\rundll32.exe
"C:\Windows\system32\rundll32.exe" user32.dll UpdatePerUserSystemParameters 0 False
Network
Files
C:\GET_YOUR_FILES_BACK.txt
| MD5 | 9cd17876488bd2c2b81b965620b9aa14 |
| SHA1 | f5305680ebd56c1eebc1797c6a7ce93117c3423c |
| SHA256 | 08152eb79c4f4b16badb06fe231da164570b62999357c8da8659e6d024f11127 |
| SHA512 | 7eea1d69e706ef86c0d2343630bc3553b2d5418523d2e4aabcc66d1c0ea3754351ed4c0ab6c185eabbd313f5333d56182c0a9e873aa05b1c5e514e9a3dfceb8d |
memory/3236-400-0x0000000074460000-0x0000000074A0B000-memory.dmp
memory/3236-401-0x0000000074460000-0x0000000074A0B000-memory.dmp
memory/3236-402-0x0000000002870000-0x00000000028B0000-memory.dmp
memory/3236-405-0x0000000074460000-0x0000000074A0B000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\1440385283.png
| MD5 | 872f2818b8dd4aa2fe819ad63cc3d349 |
| SHA1 | f95a28516f592d2191b8432744b727f69989b861 |
| SHA256 | 1134162a0e341473f75eac201100f066d39c2e10408161222b83ab8e8a418a98 |
| SHA512 | 49c2a6c15de1bf682a1a86e84bc36d2b12971be0b1b834e06c2cf34b94b0194d6e79f44c2e5d190794df5d22699aec86d59432e0ac2f5299ba11e8e85b08d9f9 |
Analysis: behavioral2
Detonation Overview
Submitted
2024-04-18 05:34
Reported
2024-04-18 05:37
Platform
win10v2004-20240412-en
Max time kernel
146s
Max time network
151s
Command Line
Signatures
Avoslocker Ransomware
Renames multiple (155) files with added filename extension
Sets desktop wallpaper using registry
| Description | Indicator | Process | Target |
| Set value (str) | \REGISTRY\USER\S-1-5-21-4092317236-2027488869-1227795436-1000\Control Panel\Desktop\Wallpaper = "C:\\Users\\Admin\\AppData\\Local\\Temp\\1539987827.png" | C:\Windows\SysWOW64\reg.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\f75e92b4cf12745c63966bb50c82e4be_JaffaCakes118.exe
"C:\Users\Admin\AppData\Local\Temp\f75e92b4cf12745c63966bb50c82e4be_JaffaCakes118.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\1539987827.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 | 76.32.126.40.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 241.154.82.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | tse1.mm.bing.net | udp |
| US | 204.79.197.200:443 | tse1.mm.bing.net | tcp |
| US | 8.8.8.8:53 | 18.24.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 21.114.53.23.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 200.197.79.204.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 26.35.223.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 183.59.114.20.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 15.164.165.52.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 172.210.232.199.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 25.24.18.2.in-addr.arpa | udp |
| US | 8.8.8.8:53 | 22.236.111.52.in-addr.arpa | udp |
Files
C:\GET_YOUR_FILES_BACK.txt
| MD5 | 9cd17876488bd2c2b81b965620b9aa14 |
| SHA1 | f5305680ebd56c1eebc1797c6a7ce93117c3423c |
| SHA256 | 08152eb79c4f4b16badb06fe231da164570b62999357c8da8659e6d024f11127 |
| SHA512 | 7eea1d69e706ef86c0d2343630bc3553b2d5418523d2e4aabcc66d1c0ea3754351ed4c0ab6c185eabbd313f5333d56182c0a9e873aa05b1c5e514e9a3dfceb8d |
memory/4232-426-0x00000000030A0000-0x00000000030D6000-memory.dmp
memory/4232-427-0x0000000074C90000-0x0000000075440000-memory.dmp
memory/4232-428-0x0000000003090000-0x00000000030A0000-memory.dmp
memory/4232-429-0x0000000003090000-0x00000000030A0000-memory.dmp
memory/4232-430-0x0000000005820000-0x0000000005E48000-memory.dmp
memory/4232-431-0x0000000005670000-0x0000000005692000-memory.dmp
memory/4232-432-0x0000000005720000-0x0000000005786000-memory.dmp
memory/4232-435-0x0000000006000000-0x0000000006066000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\__PSScriptPolicyTest_cqj4xyne.pmc.ps1
| MD5 | d17fe0a3f47be24a6453e9ef58c94641 |
| SHA1 | 6ab83620379fc69f80c0242105ddffd7d98d5d9d |
| SHA256 | 96ad1146eb96877eab5942ae0736b82d8b5e2039a80d3d6932665c1a4c87dcf7 |
| SHA512 | 5b592e58f26c264604f98f6aa12860758ce606d1c63220736cf0c779e4e18e3cec8706930a16c38b20161754d1017d1657d35258e58ca22b18f5b232880dec82 |
memory/4232-443-0x0000000006280000-0x00000000065D4000-memory.dmp
memory/4232-444-0x0000000006660000-0x000000000667E000-memory.dmp
memory/4232-445-0x0000000006710000-0x000000000675C000-memory.dmp
memory/4232-447-0x0000000003090000-0x00000000030A0000-memory.dmp
memory/4232-448-0x0000000007CE0000-0x000000000835A000-memory.dmp
memory/4232-449-0x0000000006BA0000-0x0000000006BBA000-memory.dmp
memory/4232-450-0x0000000007AD0000-0x0000000007B62000-memory.dmp
memory/4232-454-0x0000000074C90000-0x0000000075440000-memory.dmp