Analysis Overview
SHA256
57e542f11f189ba338c74406fb48ca0091279e66d2e0491e9e7c9a6c61d66b6d
Threat Level: Likely malicious
The file Clutt3.5.exe was found to be: Likely malicious.
Malicious Activity Summary
Disables RegEdit via registry modification
Possible privilege escalation attempt
Disables Task Manager via registry modification
Modifies file permissions
Writes to the Master Boot Record (MBR)
Drops file in Windows directory
Unsigned PE
Enumerates physical storage devices
Opens file in notepad (likely ransom note)
Suspicious use of SetWindowsHookEx
Suspicious use of SendNotifyMessage
Modifies registry class
Suspicious use of AdjustPrivilegeToken
Suspicious use of FindShellTrayWindow
Suspicious behavior: AddClipboardFormatListener
Suspicious behavior: GetForegroundWindowSpam
Suspicious use of WriteProcessMemory
MITRE ATT&CK Matrix V13
Analysis: static1
Detonation Overview
Reported
2024-06-08 13:18
Signatures
Unsigned PE
| Description | Indicator | Process | Target |
| N/A | N/A | N/A | N/A |
Analysis: behavioral1
Detonation Overview
Submitted
2024-06-08 13:18
Reported
2024-06-08 13:21
Platform
win7-20240508-en
Max time kernel
149s
Max time network
122s
Command Line
Signatures
Disables RegEdit via registry modification
| Description | Indicator | Process | Target |
| Set value (int) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000\Software\Microsoft\Windows\CurrentVersion\Policies\System\DisableRegistryTools = "1" | C:\Users\Admin\AppData\Local\Temp\Clutt3.5.exe | N/A |
Disables Task Manager via registry modification
Possible privilege escalation attempt
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\takeown.exe | N/A |
| N/A | N/A | C:\Windows\system32\icacls.exe | N/A |
Modifies file permissions
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\icacls.exe | N/A |
| N/A | N/A | C:\Windows\system32\takeown.exe | N/A |
Writes to the Master Boot Record (MBR)
| Description | Indicator | Process | Target |
| File opened for modification | \??\PhysicalDrive0 | C:\Users\Admin\AppData\Local\Temp\Clutt3.5.exe | N/A |
Drops file in Windows directory
| Description | Indicator | Process | Target |
| File opened for modification | C:\Windows\Debug\WIA\wiatrace.log | C:\Windows\system32\mspaint.exe | N/A |
Enumerates physical storage devices
Modifies registry class
| Description | Indicator | Process | Target |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell\play | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell\play\command | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell\play\command\ = "\"%ProgramFiles(x86)%\\Windows Media Player\\wmplayer.exe\" /Play \"%L\"" | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_Classes\Local Settings | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\raw_auto_file\shell\edit | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\ | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_Classes\Local Settings | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\.raw\ = "raw_auto_file" | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell\open | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_Classes\Local Settings | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\raw_auto_file\shell | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\raw_auto_file\shell\edit\command\ = "\"%systemroot%\\system32\\mspaint.exe\" \"%1\"" | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell\open\command\ = "\"%ProgramFiles(x86)%\\Windows Media Player\\wmplayer.exe\" /Open \"%L\"" | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_Classes\Local Settings | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\.raw | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\.vsdx\ = "vsdx_auto_file" | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\raw_auto_file\ | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell\open\command | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell\ = "Play" | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\raw_auto_file\shell\edit\command | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell\play\MUIVerb = "@%SystemRoot%\\system32\\unregmp2.exe,-9991" | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\raw_auto_file | C:\Windows\system32\rundll32.exe | N/A |
| Key created | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\.vsdx | C:\Windows\system32\rundll32.exe | N/A |
| Set value (str) | \REGISTRY\USER\S-1-5-21-268080393-3149932598-1824759070-1000_CLASSES\vsdx_auto_file\shell\play\ = "&Play" | C:\Windows\system32\rundll32.exe | N/A |
Opens file in notepad (likely ransom note)
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Windows\system32\NOTEPAD.EXE | N/A |
Suspicious behavior: AddClipboardFormatListener
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
Suspicious behavior: GetForegroundWindowSpam
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
Suspicious use of AdjustPrivilegeToken
| Description | Indicator | Process | Target |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Clutt3.5.exe | N/A |
| Token: SeDebugPrivilege | N/A | C:\Users\Admin\AppData\Local\Temp\Clutt3.5.exe | N/A |
| Token: SeTakeOwnershipPrivilege | N/A | C:\Windows\system32\takeown.exe | N/A |
Suspicious use of FindShellTrayWindow
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Clutt3.5.exe | N/A |
| N/A | N/A | C:\Users\Admin\AppData\Local\Temp\Clutt3.5.exe | N/A |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
| N/A | N/A | C:\Windows\system32\NOTEPAD.EXE | N/A |
Suspicious use of SendNotifyMessage
Suspicious use of SetWindowsHookEx
| Description | Indicator | Process | Target |
| N/A | N/A | C:\Program Files\VideoLAN\VLC\vlc.exe | N/A |
| N/A | N/A | C:\Windows\system32\mspaint.exe | N/A |
| N/A | N/A | C:\Windows\system32\mspaint.exe | N/A |
| N/A | N/A | C:\Windows\system32\mspaint.exe | N/A |
| N/A | N/A | C:\Windows\system32\mspaint.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe | N/A |
| N/A | N/A | C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe | N/A |
Suspicious use of WriteProcessMemory
Processes
C:\Users\Admin\AppData\Local\Temp\Clutt3.5.exe
"C:\Users\Admin\AppData\Local\Temp\Clutt3.5.exe"
C:\Windows\System32\cmd.exe
"C:\Windows\System32\cmd.exe" /k takeown /f C:\Windows\System32\drivers && icacls C:\Windows\System32\drivers /grant "%username%:F" && exit
C:\Windows\system32\takeown.exe
takeown /f C:\Windows\System32\drivers
C:\Windows\system32\icacls.exe
icacls C:\Windows\System32\drivers /grant "Admin:F"
C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\CopyUndo.vsdx
C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\CopyUndo.vsdx
C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\FormatSelect.raw
C:\Windows\system32\wbem\WMIADAP.EXE
wmiadap.exe /F /T
C:\Windows\system32\rundll32.exe
"C:\Windows\system32\rundll32.exe" C:\Windows\system32\shell32.dll,OpenAs_RunDLL C:\Users\Admin\Desktop\PushFormat.ex_
C:\Program Files\VideoLAN\VLC\vlc.exe
"C:\Program Files\VideoLAN\VLC\vlc.exe" --started-from-file "C:\Users\Admin\Desktop\ExitUnregister.aif"
C:\Windows\system32\NOTEPAD.EXE
"C:\Windows\system32\NOTEPAD.EXE" C:\Users\Admin\Desktop\AddDismount.ini
C:\Windows\system32\mspaint.exe
"C:\Windows\system32\mspaint.exe" "C:\Users\Admin\Desktop\FormatSelect.raw"
C:\Program Files (x86)\Windows Media Player\wmplayer.exe
"C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /Play "C:\Users\Admin\Desktop\CopyUndo.vsdx"
C:\Program Files (x86)\Windows Media Player\setup_wm.exe
"C:\Program Files (x86)\Windows Media Player\setup_wm.exe" /RunOnce:"C:\Program Files (x86)\Windows Media Player\wmplayer.exe" /Play "C:\Users\Admin\Desktop\CopyUndo.vsdx"
C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe
"C:\Program Files (x86)\Adobe\Reader 9.0\Reader\AcroRd32.exe" "C:\Users\Admin\Desktop\CopyUndo.vsdx"
Network
| Country | Destination | Domain | Proto |
| US | 8.8.8.8:53 | redir.metaservices.microsoft.com | udp |
| US | 2.17.251.24:80 | redir.metaservices.microsoft.com | tcp |
| US | 8.8.8.8:53 | onlinestores.metaservices.microsoft.com | udp |
| US | 2.17.251.92:80 | onlinestores.metaservices.microsoft.com | tcp |
Files
memory/1728-0-0x000007FEF5D03000-0x000007FEF5D04000-memory.dmp
memory/1728-1-0x0000000000860000-0x00000000008A6000-memory.dmp
memory/1728-2-0x0000000000140000-0x0000000000186000-memory.dmp
memory/1728-3-0x0000000000200000-0x0000000000206000-memory.dmp
memory/1728-4-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp
memory/1728-5-0x000007FEF5D03000-0x000007FEF5D04000-memory.dmp
memory/1728-6-0x000007FEF5D00000-0x000007FEF66EC000-memory.dmp
memory/3004-13-0x000007FEF2880000-0x000007FEF28B4000-memory.dmp
memory/3004-12-0x000000013FD80000-0x000000013FE78000-memory.dmp
memory/3004-14-0x000007FEF25C0000-0x000007FEF2876000-memory.dmp
memory/3004-17-0x000007FEF23E0000-0x000007FEF23F1000-memory.dmp
memory/3004-18-0x000007FEF23C0000-0x000007FEF23D7000-memory.dmp
memory/3004-16-0x000007FEF7060000-0x000007FEF7077000-memory.dmp
memory/3004-19-0x000007FEF23A0000-0x000007FEF23B1000-memory.dmp
memory/3004-15-0x000007FEF7B60000-0x000007FEF7B78000-memory.dmp
memory/3004-20-0x000007FEF2380000-0x000007FEF239D000-memory.dmp
memory/3004-21-0x000007FEF2360000-0x000007FEF2371000-memory.dmp
memory/3004-22-0x000007FEF2150000-0x000007FEF235B000-memory.dmp
memory/3004-23-0x000007FEEE060000-0x000007FEEF110000-memory.dmp
memory/3004-27-0x000007FEF1FE0000-0x000007FEF1FF1000-memory.dmp
memory/3004-28-0x000007FEF1FC0000-0x000007FEF1FD1000-memory.dmp
memory/3004-29-0x000007FEF1FA0000-0x000007FEF1FB1000-memory.dmp
memory/3004-26-0x000007FEF20B0000-0x000007FEF20C8000-memory.dmp
memory/3004-30-0x000007FEF2090000-0x000007FEF20AB000-memory.dmp
memory/3004-31-0x000007FEF2070000-0x000007FEF2081000-memory.dmp
memory/3004-32-0x000007FEF2050000-0x000007FEF2068000-memory.dmp
memory/3004-33-0x000007FEF2020000-0x000007FEF2050000-memory.dmp
memory/3004-25-0x000007FEF20D0000-0x000007FEF20F1000-memory.dmp
memory/3004-24-0x000007FEF2100000-0x000007FEF2141000-memory.dmp
memory/3004-34-0x000007FEF1F30000-0x000007FEF1F97000-memory.dmp
memory/3004-35-0x000007FEF1A30000-0x000007FEF1AAC000-memory.dmp
memory/3004-36-0x000007FEF2000000-0x000007FEF2011000-memory.dmp
memory/3004-39-0x000007FEF19A0000-0x000007FEF19C4000-memory.dmp
memory/3004-40-0x000007FEF1980000-0x000007FEF1998000-memory.dmp
memory/3004-38-0x000007FEF1F00000-0x000007FEF1F28000-memory.dmp
memory/3004-37-0x000007FEF19D0000-0x000007FEF1A27000-memory.dmp
memory/3004-41-0x000007FEF0600000-0x000007FEF0623000-memory.dmp
memory/3004-42-0x000007FEF05E0000-0x000007FEF05F1000-memory.dmp
memory/3004-45-0x000007FEEF4E0000-0x000007FEEF4F1000-memory.dmp
memory/3004-44-0x000007FEEF780000-0x000007FEEF791000-memory.dmp
memory/3004-43-0x000007FEF05C0000-0x000007FEF05D2000-memory.dmp
memory/2172-117-0x000007FEEBDF0000-0x000007FEEBE3C000-memory.dmp
C:\Users\Admin\AppData\Local\Temp\tmp00206.WMC\allservices.xml
| MD5 | df03e65b8e082f24dab09c57bc9c6241 |
| SHA1 | 6b0dacbf38744c9a381830e6a5dc4c71bd7cedbf |
| SHA256 | 155b9c588061c71832af329fafa5678835d9153b8fbb7592195ae953d0c455ba |
| SHA512 | ef1cc8d27fbc5da5daab854c933d3914b84ee539d4d2f0126dc1a04a830c5599e39a923c80257653638b1b99b0073a7174cc164be5887181730883c752ba2f99 |
C:\Users\Admin\AppData\Local\Temp\tmp01454.WMC\serviceinfo.xml
| MD5 | d58da90d6dc51f97cb84dfbffe2b2300 |
| SHA1 | 5f86b06b992a3146cb698a99932ead57a5ec4666 |
| SHA256 | 93acdb79543d9248ca3fca661f3ac287e6004e4b3dafd79d4c4070794ffbf2ad |
| SHA512 | 7f1e95e5aa4c8a0e4c967135c78f22f4505f2a48bbc619924d0096bf4a94d469389b9e8488c12edacfba819517b8376546687d1145660ad1f49d8c20a744e636 |