| File name: | assistant_installer.exe |
| Full analysis: | https://app.any.run/tasks/43367a46-4bf2-401f-8b36-3d4e3e3ee6db |
| Verdict: | Malicious activity |
| Threats: | Stealers are a group of malicious software that are intended for gaining unauthorized access to users’ information and transferring it to the attacker. The stealer malware category includes various types of programs that focus on their particular kind of data, including files, passwords, and cryptocurrency. Stealers are capable of spying on their targets by recording their keystrokes and taking screenshots. This type of malware is primarily distributed as part of phishing campaigns. |
| Analysis date: | January 03, 2025, 08:19:48 |
| 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, 8 sections |
| MD5: | 3B103A9BA068FB4F932D272D19F5619F |
| SHA1: | 8270ADF6A18D0101CE54AFB77179D55A78A35FC7 |
| SHA256: | 7E9F5F137372BF9E13383DC06C71139D92A4A7EFCB5C64C570311999ECAFAB15 |
| SSDEEP: | 98304:WSmPHxLGa9d55yghz5+vJodSBjrvJTVjTbgYBxQqs:G |
MALICIOUS
Steals credentials from Web Browsers
- assistant_installer.exe (PID: 6076)
- assistant_installer.exe (PID: 4740)
Actions looks like stealing of personal data
- assistant_installer.exe (PID: 6076)
- assistant_installer.exe (PID: 4740)
SUSPICIOUS
Application launched itself
- assistant_installer.exe (PID: 4740)
INFO
Checks supported languages
- assistant_installer.exe (PID: 4740)
- assistant_installer.exe (PID: 6076)
The sample compiled with english language support
- assistant_installer.exe (PID: 4740)
Reads the computer name
- assistant_installer.exe (PID: 4740)
Creates files or folders in the user directory
- assistant_installer.exe (PID: 6076)
- assistant_installer.exe (PID: 4740)
Sends debugging messages
- assistant_installer.exe (PID: 4740)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .exe | | | Generic Win/DOS Executable (50) |
|---|---|---|
| .exe | | | DOS Executable Generic (49.9) |
EXIF
EXE
| MachineType: | Intel 386 or later, and compatibles |
|---|---|
| TimeStamp: | 2024:09:24 15:57:00+00:00 |
| ImageFileCharacteristics: | Executable, Large address aware, 32-bit |
| PEType: | PE32 |
| LinkerVersion: | 14 |
| CodeSize: | 1724416 |
| InitializedDataSize: | 370176 |
| UninitializedDataSize: | - |
| EntryPoint: | 0x10a8c0 |
| OSVersion: | 10 |
| ImageVersion: | - |
| SubsystemVersion: | 10 |
| Subsystem: | Windows GUI |
| FileVersionNumber: | 114.0.5282.21 |
| ProductVersionNumber: | 114.0.5282.21 |
| FileFlagsMask: | 0x003f |
| FileFlags: | (none) |
| FileOS: | Windows NT 32-bit |
| ObjectFileType: | Executable application |
| FileSubtype: | - |
| LanguageCode: | English (U.S.) |
| CharacterSet: | Unicode |
| CompanyName: | Opera Software |
| FileDescription: | Opera Browser Assistant Installer |
| FileVersion: | 114.0.5282.21 |
| InternalName: | Opera |
| LegalCopyright: | Copyright Opera Software 2024 |
| ProductName: | Opera Browser Assistant Installer |
| ProductVersion: | 114.0.5282.21 |
Total processes
126
Monitored processes
2
Malicious processes
2
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 4740 | "C:\Users\admin\AppData\Local\Temp\assistant_installer.exe" | C:\Users\admin\AppData\Local\Temp\assistant_installer.exe | explorer.exe | ||||||||||||
User: admin Company: Opera Software Integrity Level: MEDIUM Description: Opera Browser Assistant Installer Exit code: 1 Version: 114.0.5282.21 Modules
| |||||||||||||||
| 6076 | C:\Users\admin\AppData\Local\Temp\assistant_installer.exe --type=crashpad-handler /prefetch:4 --monitor-self-annotation=ptype=crashpad-handler "--database=C:\Users\admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports" "--crash-count-file=C:\Users\admin\AppData\Roaming\Opera Software\Opera Stable\crash_count.txt" --url=https://crashstats-collector-2.opera.com/ --annotation=channel=Stable --annotation=plat=Win32 --annotation=prod=OperaDesktop --annotation=ver=114.0.5282.21 --initial-client-data=0x260,0x264,0x268,0x23c,0x26c,0xdd17a0,0xdd17ac,0xdd17b8 | C:\Users\admin\AppData\Local\Temp\assistant_installer.exe | assistant_installer.exe | ||||||||||||
User: admin Company: Opera Software Integrity Level: MEDIUM Description: Opera Browser Assistant Installer Exit code: 0 Version: 114.0.5282.21 Modules
| |||||||||||||||
Total events
39
Read events
39
Write events
0
Delete events
0
Modification events
Executable files
0
Suspicious files
1
Text files
1
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 4740 | assistant_installer.exe | C:\Users\admin\AppData\Roaming\Opera Software\Opera Stable\Crash Reports\settings.dat | binary | |
MD5:364AF77C674BAD2DF0F30444F093DB1A | SHA256:7D8553FCCDAF3C3470E950ED4B28FAE2DAFC37BDE36322A772C2030CED2CBE9C | |||
| 4740 | assistant_installer.exe | C:\Users\admin\AppData\Local\Temp\assistant_installer_20250103081953.log | text | |
MD5:386EB59DBF79B22F44845F3FE325349E | SHA256:FF053537B0C3D9C3A43D0E219CE284140A4FD45451CCAF4DEA4A629060208816 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
10
TCP/UDP connections
33
DNS requests
16
Threats
0
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
— | — | GET | 200 | 213.155.157.219:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
4712 | MoUsoCoreWorker.exe | GET | 200 | 23.40.113.217:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
— | — | GET | 200 | 23.40.113.217:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
4712 | MoUsoCoreWorker.exe | GET | 200 | 213.155.157.219:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
— | — | GET | 200 | 23.40.113.217:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
5064 | SearchApp.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTrjrydRyt%2BApF3GSPypfHBxR5XtQQUs9tIpPmhxdiuNkHMEWNpYim8S8YCEAI5PUjXAkJafLQcAAsO18o%3D | unknown | — | — | whitelisted |
1176 | svchost.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
6836 | SIHClient.exe | GET | 200 | 23.40.113.217:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl | unknown | — | — | whitelisted |
6836 | SIHClient.exe | GET | 200 | 23.40.113.217:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | unknown | — | — | whitelisted |
5836 | backgroundTaskHost.exe | GET | 200 | 192.229.221.95:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAUZZSZEml49Gjh0j13P68w%3D | unknown | — | — | whitelisted |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
— | — | 20.73.194.208:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
— | — | 192.168.100.255:137 | — | — | — | whitelisted |
— | — | 213.155.157.219:80 | crl.microsoft.com | Telia Company AB | SE | whitelisted |
4712 | MoUsoCoreWorker.exe | 213.155.157.219:80 | crl.microsoft.com | Telia Company AB | SE | whitelisted |
4712 | MoUsoCoreWorker.exe | 23.40.113.217:80 | www.microsoft.com | AKAMAI-AS | FR | whitelisted |
— | — | 23.40.113.217:80 | www.microsoft.com | AKAMAI-AS | FR | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
5064 | SearchApp.exe | 2.21.245.21:443 | www.bing.com | Akamai International B.V. | NL | whitelisted |
1176 | svchost.exe | 40.126.32.140:443 | login.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | whitelisted |
1176 | svchost.exe | 192.229.221.95:80 | ocsp.digicert.com | EDGECAST | US | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
crl.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
www.bing.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
go.microsoft.com |
| whitelisted |
arc.msn.com |
| whitelisted |
fd.api.iris.microsoft.com |
| whitelisted |
Threats
Process | Message |
|---|---|
assistant_installer.exe | [0103/081953.030:INFO:assistant_installer_main.cc(177)] Running assistant installer with command line "C:\Users\admin\AppData\Local\Temp\assistant_installer.exe"
|