| File name: | locksystem.exe |
| Full analysis: | https://app.any.run/tasks/7347fa37-1fb1-4c14-94e1-fad4e338dfcf |
| Verdict: | Malicious activity |
| Threats: | Ransomware is a type of malicious software that locks users out of their system or data using different methods to force them to pay a ransom. Most often, such programs encrypt files on an infected machine and demand a fee to be paid in exchange for the decryption key. Additionally, such programs can be used to steal sensitive information from the compromised computer and even conduct DDoS attacks against affected organizations to pressure them into paying. |
| Analysis date: | July 09, 2024, 17:29:24 |
| OS: | Windows 10 Professional (build: 19045, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-dosexec |
| File info: | PE32+ executable (console) x86-64, for MS Windows |
| MD5: | 667B3DB774BB33D876E637BFCA19A0FA |
| SHA1: | 2F596E9711C157F49A0A233DFCC23196A719B8A3 |
| SHA256: | 67ED147F0EBAFB0391627D1C22B7666387B3C1693C5D8E9A590AF3C89DF0EF44 |
| SSDEEP: | 49152:M6HBuAYhUYLsV/b66066dTQ98rqqII+ke5F:9YwpeqqII+ke5F |
MALICIOUS
Drops the executable file immediately after the start
- locksystem.exe (PID: 2204)
- csc.exe (PID: 2968)
Run PowerShell with an invisible window
- powershell.exe (PID: 936)
- powershell.exe (PID: 6708)
Bypass execution policy to execute commands
- powershell.exe (PID: 936)
- powershell.exe (PID: 6708)
Changes powershell execution policy (Bypass)
- cmd.exe (PID: 5420)
- powershell.exe (PID: 936)
Gets or sets the symmetric key that is used for encryption and decryption (POWERSHELL)
- powershell.exe (PID: 936)
Gets or sets the initialization vector for the symmetric algorithm (POWERSHELL)
- powershell.exe (PID: 936)
Uses AES cipher (POWERSHELL)
- powershell.exe (PID: 936)
SUSPICIOUS
Starts CMD.EXE for commands execution
- locksystem.exe (PID: 2204)
Base64-obfuscated command line is found
- cmd.exe (PID: 5420)
Starts POWERSHELL.EXE for commands execution
- powershell.exe (PID: 936)
- cmd.exe (PID: 5420)
BASE64 encoded PowerShell command has been detected
- cmd.exe (PID: 5420)
Application launched itself
- powershell.exe (PID: 936)
Gets or sets the security protocol (POWERSHELL)
- powershell.exe (PID: 936)
Creates files like ransomware instruction
- powershell.exe (PID: 936)
Executable content was dropped or overwritten
- csc.exe (PID: 2968)
Uses base64 encoding (POWERSHELL)
- powershell.exe (PID: 936)
INFO
Checks supported languages
- locksystem.exe (PID: 2204)
- csc.exe (PID: 2968)
- cvtres.exe (PID: 1120)
Create files in a temporary directory
- locksystem.exe (PID: 2204)
- csc.exe (PID: 2968)
- cvtres.exe (PID: 1120)
Found Base64 encoded text manipulation via PowerShell (YARA)
- locksystem.exe (PID: 2204)
Found Base64 encoded network access via PowerShell (YARA)
- locksystem.exe (PID: 2204)
Found Base64 encoded file access via PowerShell (YARA)
- locksystem.exe (PID: 2204)
Disables trace logs
- powershell.exe (PID: 936)
Found Base64 encoded reflection usage via PowerShell (YARA)
- locksystem.exe (PID: 2204)
Checks proxy server information
- powershell.exe (PID: 936)
Found Base64 encoded access to BitConverter class via PowerShell (YARA)
- locksystem.exe (PID: 2204)
Reads the machine GUID from the registry
- csc.exe (PID: 2968)
Script raised an exception (POWERSHELL)
- powershell.exe (PID: 936)
Manual execution by a user
- notepad.exe (PID: 5464)
- notepad.exe (PID: 3932)
Reads security settings of Internet Explorer
- notepad.exe (PID: 5464)
- notepad.exe (PID: 3932)
Found Base64 encoded access to Marshal class via PowerShell (YARA)
- locksystem.exe (PID: 2204)
Found Base64 encoded encryption-related PowerShell classes (YARA)
- locksystem.exe (PID: 2204)
Gets data length (POWERSHELL)
- powershell.exe (PID: 936)
Uses string replace method (POWERSHELL)
- powershell.exe (PID: 936)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | Win64 Executable (generic) (87.2) |
|---|---|---|
| .exe | | | Generic Win/DOS Executable (6.3) |
| .exe | | | DOS Executable Generic (6.3) |
EXIF
EXE
| MachineType: | AMD AMD64 |
|---|---|
| TimeStamp: | 2024:07:09 17:28:17+00:00 |
| ImageFileCharacteristics: | No relocs, Executable, No line numbers, Large address aware |
| PEType: | PE32+ |
| LinkerVersion: | 2.24 |
| CodeSize: | 462336 |
| InitializedDataSize: | 790016 |
| UninitializedDataSize: | 6144 |
| EntryPoint: | 0x1500 |
| OSVersion: | 4 |
| ImageVersion: | - |
| SubsystemVersion: | 5.2 |
| Subsystem: | Windows command line |
Total processes
139
Monitored processes
9
Malicious processes
3
Suspicious processes
1
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 244 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | locksystem.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Console Window Host Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 936 | powershell -ExecutionPolicy Bypass -win hidden -e JABjAG8AbQBtAGEAbgBkAD0AZwBjACAAJABlAG4AdgA6AHQAbQBwAFwAXABNAGkAYwByAG8AcwBvAGYAdABTAGUAcgB2AGkAYwBlAEMAcgBlAGEAdABpAG8AbgAuAHAAcwAxAA0ACgBbAFQAZQB4AHQALgBFAG4AYwBvAGQAaQBuAGcAXQA6ADoAVQBuAGkAYwBvAGQAZQAuAEcAZQB0AFMAdAByAGkAbgBnACgAWwBDAG8AbgB2AGUAcgB0AF0AOgA6AEYAcgBvAG0AQgBhAHMAZQA2ADQAUwB0AHIAaQBuAGcAKAAkAGMAbwBtAG0AYQBuAGQAKQApACAAfAAgAGkAZQB4AA== | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | cmd.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows PowerShell Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 1120 | C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe /NOLOGO /READONLY /MACHINE:IX86 "/OUT:C:\Users\admin\AppData\Local\Temp\RES2964.tmp" "c:\Users\admin\AppData\Local\Temp\CSCDF01E716FA7C498FABFEB11F3A5C11D5.TMP" | C:\Windows\Microsoft.NET\Framework64\v4.0.30319\cvtres.exe | — | csc.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Microsoft® Resource File To COFF Object Conversion Utility Exit code: 0 Version: 14.32.31326.0 Modules
| |||||||||||||||
| 2204 | "C:\Users\admin\AppData\Local\Temp\locksystem.exe" | C:\Users\admin\AppData\Local\Temp\locksystem.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: MEDIUM Exit code: 0 Modules
| |||||||||||||||
| 2968 | "C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe" /noconfig /fullpaths @"C:\Users\admin\AppData\Local\Temp\onmfpkue.cmdline" | C:\Windows\Microsoft.NET\Framework64\v4.0.30319\csc.exe | powershell.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Visual C# Command Line Compiler Exit code: 0 Version: 4.8.9037.0 built by: NET481REL1 Modules
| |||||||||||||||
| 3932 | "C:\WINDOWS\system32\NOTEPAD.EXE" C:\Users\admin\Desktop\Read_Me_Encrypted.txt | C:\Windows\System32\notepad.exe | — | explorer.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Notepad Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 5420 | C:\WINDOWS\system32\cmd.exe /c cd %temp% && powershell -ExecutionPolicy Bypass -win hidden -e JABjAG8AbQBtAGEAbgBkAD0AZwBjACAAJABlAG4AdgA6AHQAbQBwAFwAXABNAGkAYwByAG8AcwBvAGYAdABTAGUAcgB2AGkAYwBlAEMAcgBlAGEAdABpAG8AbgAuAHAAcwAxAA0ACgBbAFQAZQB4AHQALgBFAG4AYwBvAGQAaQBuAGcAXQA6ADoAVQBuAGkAYwBvAGQAZQAuAEcAZQB0AFMAdAByAGkAbgBnACgAWwBDAG8AbgB2AGUAcgB0AF0AOgA6AEYAcgBvAG0AQgBhAHMAZQA2ADQAUwB0AHIAaQBuAGcAKAAkAGMAbwBtAG0AYQBuAGQAKQApACAAfAAgAGkAZQB4AA== | C:\Windows\System32\cmd.exe | — | locksystem.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Command Processor Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 5464 | "C:\WINDOWS\system32\NOTEPAD.EXE" C:\Users\admin\Desktop\Read_Me_Encrypted.txt | C:\Windows\System32\notepad.exe | — | explorer.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Notepad Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 6708 | "C:\WINDOWS\System32\WindowsPowerShell\v1.0\powershell.exe" -executionpolicy bypass -win hidden -c echo I Am Running | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | — | powershell.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows PowerShell Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
Total events
16 257
Read events
16 243
Write events
14
Delete events
0
Modification events
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASAPI32 |
| Operation: | write | Name: | EnableFileTracing |
Value: 0 | |||
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASAPI32 |
| Operation: | write | Name: | EnableAutoFileTracing |
Value: 0 | |||
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASAPI32 |
| Operation: | write | Name: | EnableConsoleTracing |
Value: 0 | |||
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASAPI32 |
| Operation: | write | Name: | FileTracingMask |
Value: | |||
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASAPI32 |
| Operation: | write | Name: | ConsoleTracingMask |
Value: | |||
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASAPI32 |
| Operation: | write | Name: | MaxFileSize |
Value: 1048576 | |||
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASAPI32 |
| Operation: | write | Name: | FileDirectory |
Value: %windir%\tracing | |||
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASMANCS |
| Operation: | write | Name: | EnableFileTracing |
Value: 0 | |||
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASMANCS |
| Operation: | write | Name: | EnableAutoFileTracing |
Value: 0 | |||
| (PID) Process: | (936) powershell.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Tracing\powershell_RASMANCS |
| Operation: | write | Name: | EnableConsoleTracing |
Value: 0 | |||
Executable files
1
Suspicious files
264
Text files
10
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 2204 | locksystem.exe | C:\Users\admin\AppData\Local\Temp\MicrosoftServiceCreation.ps1 | text | |
MD5:217E98B850FC355FF6745DA692CA3365 | SHA256:3145464A0E496AAFE40BF05EA421985BFCAF242CD08FF208CAB11E508C82B1F4 | |||
| 936 | powershell.exe | C:\Users\admin\Desktop\aborn.png..LOCKSYSTEM | binary | |
MD5:24747FA11D47E685D346ED050D56515A | SHA256:685C8EBECEC5773F4C34D2B0A07521C34A417F5AE75857646156E8BC969BF8E9 | |||
| 936 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_iznjq2fr.vgn.ps1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 936 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_imrsci0y.4rj.psm1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 936 | powershell.exe | C:\Users\admin\Desktop\loanduring.rtf..LOCKSYSTEM | binary | |
MD5:DAE40EC931250577D8E84B593F475A79 | SHA256:FCD41FF4294F2983DE45022B615D8AF602DBE19B28D3E4AD421DBCE88BE0BE7B | |||
| 936 | powershell.exe | C:\Users\admin\AppData\Local\Temp\image_cg.jpg | image | |
MD5:0D65D002A9948F2D9E96312D100D05CD | SHA256:C158F0E4C90837B93D5B6E498DB6737F56A5AA020EC38D0ECC9DD7E47D731C1F | |||
| 936 | powershell.exe | C:\Users\admin\Desktop\aidhard.png..LOCKSYSTEM | binary | |
MD5:C53A42B1F1ED9695C508EC12A909AB87 | SHA256:827CB85993482846E146AF8CBB8123082F8B1D2533DB90DB5C0C608242BB1DD4 | |||
| 6708 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_21do1wkg.gil.psm1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 6708 | powershell.exe | C:\Users\admin\AppData\Local\Temp\__PSScriptPolicyTest_00vly1rk.nlo.ps1 | text | |
MD5:D17FE0A3F47BE24A6453E9EF58C94641 | SHA256:96AD1146EB96877EAB5942AE0736B82D8B5E2039A80D3D6932665C1A4C87DCF7 | |||
| 6708 | powershell.exe | C:\Users\admin\AppData\Local\Microsoft\Windows\PowerShell\StartupProfileData-NonInteractive | binary | |
MD5:7421CE7FEA242E7E80D8819932334003 | SHA256:20CF238F50F6805F88F9E451CF18ACBBAB029BC7B34BBC480581F22886715BF5 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
4
TCP/UDP connections
30
DNS requests
11
Threats
1
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
— | — | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | unknown |
6360 | backgroundTaskHost.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAn5bsKVVV8kdJ6vHl3O1J0%3D | unknown | — | — | unknown |
4152 | SIHClient.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl | unknown | — | — | unknown |
4152 | SIHClient.exe | GET | 200 | 184.30.21.171:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | unknown | — | — | unknown |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
1972 | svchost.exe | 20.73.194.208:443 | — | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
2052 | RUXIMICS.exe | 20.73.194.208:443 | — | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
6004 | svchost.exe | 20.73.194.208:443 | — | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
4032 | svchost.exe | 239.255.255.250:1900 | — | — | — | whitelisted |
— | — | 20.190.159.71:443 | login.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
— | — | 104.126.37.136:443 | www.bing.com | Akamai International B.V. | DE | unknown |
1060 | svchost.exe | 23.35.238.131:443 | go.microsoft.com | AKAMAI-AS | DE | unknown |
3040 | OfficeClickToRun.exe | 52.111.243.31:443 | nexusrules.officeapps.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | unknown |
— | — | 192.229.221.95:80 | — | EDGECAST | US | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
login.live.com |
| whitelisted |
www.bing.com |
| whitelisted |
go.microsoft.com |
| whitelisted |
nexusrules.officeapps.live.com |
| whitelisted |
i.ibb.co.com |
| unknown |
arc.msn.com |
| whitelisted |
slscr.update.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
fe3cr.delivery.mp.microsoft.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
936 | powershell.exe | Not Suspicious Traffic | INFO [ANY.RUN] Image hosting service ImgBB |