| File name: | mrsys.exe |
| Full analysis: | https://app.any.run/tasks/6ff7ac7a-2eff-47f9-acfa-4ec4b066fcca |
| Verdict: | Malicious activity |
| Threats: | A loader is malicious software that infiltrates devices to deliver malicious payloads. This malware is capable of infecting victims’ computers, analyzing their system information, and installing other types of threats, such as trojans or stealers. Criminals usually deliver loaders through phishing emails and links by relying on social engineering to trick users into downloading and running their executables. Loaders employ advanced evasion and persistence tactics to avoid detection. |
| Analysis date: | January 22, 2025, 13:05:15 |
| OS: | Windows 10 Professional (build: 19045, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/vnd.microsoft.portable-executable |
| File info: | PE32 executable (GUI) Intel 80386, for MS Windows, 3 sections |
| MD5: | 138FADD6E851703E82E9DC5408DB91EE |
| SHA1: | AE5453F552F5B2047BDE4672F04D11BF04B47955 |
| SHA256: | 8695DB07FA766D7FF90B380D1A824678BBA59569B71E506C1A68B12276B13811 |
| SSDEEP: | 6144:b6XnW2Kg+zWnv2UAO3iaM25DZgCaYi73U2rRCpfAbq8bi:+3BDZfGrRCpfAbq8e |
MALICIOUS
Changes the autorun value in the registry
- explorer.exe (PID: 2800)
- svchost.exe (PID: 5588)
MOFKSYS has been detected (YARA)
- explorer.exe (PID: 2800)
- svchost.exe (PID: 5588)
BAZALOADER has been detected (YARA)
- svchost.exe (PID: 5588)
SUSPICIOUS
Executable content was dropped or overwritten
- mrsys.exe (PID: 5316)
- explorer.exe (PID: 2800)
- spoolsv.exe (PID: 4308)
The process creates files with name similar to system file names
- mrsys.exe (PID: 5316)
- spoolsv.exe (PID: 4308)
Starts itself from another location
- explorer.exe (PID: 2800)
- mrsys.exe (PID: 5316)
- spoolsv.exe (PID: 4308)
- svchost.exe (PID: 5588)
There is functionality for taking screenshot (YARA)
- explorer.exe (PID: 2800)
- svchost.exe (PID: 5588)
INFO
Create files in a temporary directory
- mrsys.exe (PID: 540)
- mrsys.exe (PID: 5316)
- spoolsv.exe (PID: 4308)
- explorer.exe (PID: 2800)
- svchost.exe (PID: 5588)
- spoolsv.exe (PID: 440)
Checks supported languages
- mrsys.exe (PID: 540)
- mrsys.exe (PID: 5316)
- explorer.exe (PID: 2800)
- spoolsv.exe (PID: 4308)
- svchost.exe (PID: 5588)
- spoolsv.exe (PID: 440)
Failed to create an executable file in Windows directory
- mrsys.exe (PID: 540)
The sample compiled with english language support
- mrsys.exe (PID: 540)
Manual execution by a user
- mrsys.exe (PID: 5316)
Reads the computer name
- explorer.exe (PID: 2800)
- mrsys.exe (PID: 540)
- svchost.exe (PID: 5588)
Creates files or folders in the user directory
- explorer.exe (PID: 2800)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | Win32 Executable (generic) (52.9) |
|---|---|---|
| .exe | | | Generic Win/DOS Executable (23.5) |
| .exe | | | DOS Executable Generic (23.5) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2011:06:14 19:01:16+00:00 |
| ImageFileCharacteristics: | No relocs, Executable, No line numbers, No symbols, 32-bit |
| PEType: | PE32 |
| LinkerVersion: | 6 |
| CodeSize: | 176128 |
| InitializedDataSize: | 12288 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x3670 |
| OSVersion: | 4 |
| ImageVersion: | 1 |
| SubsystemVersion: | 4 |
| Subsystem: | Windows GUI |
| FileVersionNumber: | 1.0.0.0 |
| ProductVersionNumber: | 1.0.0.0 |
| FileFlagsMask: | 0x0000 |
| FileFlags: | (none) |
| FileOS: | Win32 |
| ObjectFileType: | Executable application |
| FileSubtype: | - |
| LanguageCode: | English (U.S.) |
| CharacterSet: | Unicode |
| CompanyName: | Microsoft |
| ProductName: | Win |
| FileVersion: | 1 |
| ProductVersion: | 1 |
| InternalName: | Win |
| OriginalFileName: | Win.exe |
Total processes
126
Monitored processes
8
Malicious processes
4
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 440 | c:\windows\system\spoolsv.exe PR | C:\Windows\System\spoolsv.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Integrity Level: HIGH Exit code: 0 Version: 1.00 Modules
| |||||||||||||||
| 540 | "C:\Users\admin\Desktop\mrsys.exe" | C:\Users\admin\Desktop\mrsys.exe | — | explorer.exe | |||||||||||
User: admin Company: Microsoft Integrity Level: MEDIUM Exit code: 0 Version: 1.00 Modules
| |||||||||||||||
| 1512 | at 13:07 /interactive /every:M,T,W,Th,F,S,Su c:\windows\system\svchost.exe | C:\Windows\SysWOW64\at.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Schedule service command line interface Exit code: 1 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 1752 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | at.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Console Window Host Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 2800 | c:\windows\system\explorer.exe | C:\Windows\System\explorer.exe | mrsys.exe | ||||||||||||
User: admin Company: Microsoft Integrity Level: HIGH Version: 1.00 Modules
| |||||||||||||||
| 4308 | c:\windows\system\spoolsv.exe SE | C:\Windows\System\spoolsv.exe | explorer.exe | ||||||||||||
User: admin Company: Microsoft Integrity Level: HIGH Exit code: 0 Version: 1.00 Modules
| |||||||||||||||
| 5316 | "C:\Users\admin\Desktop\mrsys.exe" | C:\Users\admin\Desktop\mrsys.exe | explorer.exe | ||||||||||||
User: admin Company: Microsoft Integrity Level: HIGH Exit code: 0 Version: 1.00 Modules
| |||||||||||||||
| 5588 | c:\windows\system\svchost.exe | C:\Windows\System\svchost.exe | spoolsv.exe | ||||||||||||
User: admin Company: Microsoft Integrity Level: HIGH Version: 1.00 Modules
| |||||||||||||||
Total events
736
Read events
721
Write events
10
Delete events
5
Modification events
| (PID) Process: | (540) mrsys.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\VB and VBA Program Settings\Explorer\Process |
| Operation: | write | Name: | LO |
Value: 1 | |||
| (PID) Process: | (5316) mrsys.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\VB and VBA Program Settings\Explorer\Process |
| Operation: | write | Name: | LO |
Value: 1 | |||
| (PID) Process: | (5588) svchost.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce |
| Operation: | write | Name: | Explorer |
Value: c:\windows\system\explorer.exe RO | |||
| (PID) Process: | (5588) svchost.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce |
| Operation: | write | Name: | Svchost |
Value: c:\windows\system\svchost.exe RO | |||
| (PID) Process: | (5588) svchost.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{F146C9B1-VMVQ-A9RC-NUFL-D0BA00B4E999} |
| Operation: | write | Name: | StubPath |
Value: C:\Users\admin\AppData\Roaming\mrsys.exe MR | |||
| (PID) Process: | (5588) svchost.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Active Setup\Installed Components\{Y479C6D0-OTRW-U5GH-S1EE-E0AC10B4E666} |
| Operation: | delete key | Name: | (default) |
Value: | |||
| (PID) Process: | (5588) svchost.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run |
| Operation: | delete value | Name: | Explorer |
Value: | |||
| (PID) Process: | (5588) svchost.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Run |
| Operation: | delete value | Name: | Svchost |
Value: | |||
| (PID) Process: | (2800) explorer.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce |
| Operation: | write | Name: | Explorer |
Value: c:\windows\system\explorer.exe RO | |||
| (PID) Process: | (2800) explorer.exe | Key: | HKEY_LOCAL_MACHINE\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\RunOnce |
| Operation: | write | Name: | Svchost |
Value: c:\windows\system\svchost.exe RO | |||
Executable files
4
Suspicious files
4
Text files
0
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 440 | spoolsv.exe | C:\Users\admin\AppData\Local\Temp\~DFACEC228095CF7588.TMP | binary | |
MD5:C37DCF77DF46C8AC1952055C0AEEEF03 | SHA256:B4D2F3185A726E52DC750E1245798AEF8E9BC77C94178F4304C05D6983FC30F5 | |||
| 2800 | explorer.exe | C:\Windows\System\spoolsv.exe | executable | |
MD5:6E1A7DAB19A46AD4DF2408381B28AF7B | SHA256:6B1AB65E9FF19D9611D16108AA471998434DDF69849519FD2FFBFEF5C86DD979 | |||
| 5316 | mrsys.exe | C:\Users\admin\AppData\Local\Temp\~DF20F7DFBF5E26A1D7.TMP | binary | |
MD5:087E81EF7A90A0D93E4FCEF721D583D7 | SHA256:292D0F55A24ECF2E7750510EDAC74FD7155145EFAE297CAAF529E6081F39D282 | |||
| 2800 | explorer.exe | C:\Users\admin\AppData\Roaming\mrsys.exe | executable | |
MD5:653DB7F635FC7F0F2D005D669ACEC164 | SHA256:EA7187B259B1B36925FD6539CD6022DB00D2C37CA49C6A6230AB5B57AA195177 | |||
| 5316 | mrsys.exe | C:\Windows\System\explorer.exe | executable | |
MD5:C9864771FE12166C314A2E423AFCE95F | SHA256:1CA8AEDEAF154DFBD5FF42C1AEF6BFF76E440AD5DBF319262FB26DE8AC1F1809 | |||
| 4308 | spoolsv.exe | C:\Windows\System\svchost.exe | executable | |
MD5:3266073C8454F3E7EC61415A9BBC3644 | SHA256:36C188C6840330F027ED7BB96B6F4C6C06E25D73552E1F6CA1833EBC6D50D7AD | |||
| 4308 | spoolsv.exe | C:\Users\admin\AppData\Local\Temp\~DF511C567807F19944.TMP | binary | |
MD5:2A826D396276723FCB05C225DACC2226 | SHA256:6BEE436297BFA1339B4DE25E20436BA7223A5284EC27ABBD9D770FB1C1ED9D1C | |||
| 540 | mrsys.exe | C:\Users\admin\AppData\Local\Temp\~DFC37E6857104368D8.TMP | binary | |
MD5:64DF9E4799C62A5FF31B410A3BAC6881 | SHA256:50424ADC5C81D1D32290424710383F9B716BC72A7F85D2F8DF402C3FB33D71EC | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
0
TCP/UDP connections
28
DNS requests
3
Threats
0
HTTP requests
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
— | — | 40.127.240.158:443 | — | MICROSOFT-CORP-MSN-AS-BLOCK | IE | unknown |
— | — | 104.126.37.155:443 | — | Akamai International B.V. | DE | unknown |
— | — | 104.126.37.161:443 | — | Akamai International B.V. | DE | unknown |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
4712 | MoUsoCoreWorker.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
716 | svchost.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
3976 | svchost.exe | 4.231.128.59:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
google.com |
| whitelisted |
settings-win.data.microsoft.com |
| whitelisted |