| File name: | Octalyn.rar |
| Full analysis: | https://app.any.run/tasks/785f3c72-bf2f-4c36-8f3a-c5c8597f5dcb |
| 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: | April 29, 2025, 11:05:30 |
| OS: | Windows 10 Professional (build: 19044, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-rar |
| File info: | RAR archive data, v5 |
| MD5: | 781FA303D7DF158A8F70F5A941D78911 |
| SHA1: | 8B4EF61C0A13497C46646D848770554EEA420623 |
| SHA256: | AC751A61CCEFF15349DE19ED1FC4DC7E5B11828BF1143DBB225A12EA8E049FC4 |
| SSDEEP: | 98304:NB70chEZk1R6l/bkt/neGtrk0k04gLQxir7wG0074Jn8kEjQOc7WFAYaokmAMiHQ:mjGMQ |
MALICIOUS
Generic archive extractor
- WinRAR.exe (PID: 5072)
Actions looks like stealing of personal data
- Build.exe (PID: 4528)
Steals credentials from Web Browsers
- Build.exe (PID: 4528)
OCTALYN has been detected
- Build.exe (PID: 4528)
- powershell.exe (PID: 3900)
Run PowerShell with an invisible window
- powershell.exe (PID: 3096)
- powershell.exe (PID: 3900)
OCTALYN has been detected (YARA)
- Octalyn.exe (PID: 5176)
SUSPICIOUS
Executable content was dropped or overwritten
- Octalyn.exe (PID: 5176)
Starts POWERSHELL.EXE for commands execution
- Build.exe (PID: 4528)
- Build.exe (PID: 444)
Loads DLL from Mozilla Firefox
- Build.exe (PID: 4528)
Checks for external IP
- Build.exe (PID: 4528)
- Build.exe (PID: 444)
Potential Corporate Privacy Violation
- Build.exe (PID: 4528)
- Build.exe (PID: 444)
Gets file extension (POWERSHELL)
- powershell.exe (PID: 3900)
INFO
Manual execution by a user
- Octalyn.exe (PID: 5176)
- Build.exe (PID: 4528)
- Build.exe (PID: 444)
Executable content was dropped or overwritten
- WinRAR.exe (PID: 5072)
Create files in a temporary directory
- Octalyn.exe (PID: 5176)
- Build.exe (PID: 4528)
Checks supported languages
- Octalyn.exe (PID: 5176)
- Build.exe (PID: 4528)
Reads the computer name
- Octalyn.exe (PID: 5176)
- Build.exe (PID: 4528)
The sample compiled with english language support
- WinRAR.exe (PID: 5072)
Reads the software policy settings
- slui.exe (PID: 3268)
- slui.exe (PID: 2560)
Compiled with Borland Delphi (YARA)
- Octalyn.exe (PID: 5176)
- slui.exe (PID: 2560)
Checks proxy server information
- slui.exe (PID: 2560)
Creates files or folders in the user directory
- Build.exe (PID: 4528)
Checks if a key exists in the options dictionary (POWERSHELL)
- powershell.exe (PID: 3900)
Gets data length (POWERSHELL)
- powershell.exe (PID: 3900)
Uses string replace method (POWERSHELL)
- powershell.exe (PID: 3900)
Checks whether the specified file exists (POWERSHELL)
- powershell.exe (PID: 3900)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .rar | | | RAR compressed archive (v5.0) (61.5) |
|---|---|---|
| .rar | | | RAR compressed archive (gen) (38.4) |
EXIF
ZIP
| FileVersion: | RAR v5 |
|---|---|
| CompressedSize: | 2314249 |
| UncompressedSize: | 7451136 |
| OperatingSystem: | Win32 |
| ArchivedFileName: | Octalyn/Octalyn.exe |
Total processes
147
Monitored processes
11
Malicious processes
3
Suspicious processes
1
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 444 | "C:\Users\admin\Desktop\Build.exe" | C:\Users\admin\Desktop\Build.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: HIGH Exit code: 0 Modules
| |||||||||||||||
| 1056 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | powershell.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
| |||||||||||||||
| 2560 | C:\WINDOWS\System32\slui.exe -Embedding | C:\Windows\System32\slui.exe | svchost.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Windows Activation Client Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 3096 | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -WindowStyle Hidden -Command "Compress-Archive -Path 'C:\Users\admin\AppData\Local\Temp\Octalyn' -DestinationPath 'C:\Users\admin\AppData\Local\Temp\admin_OctalynRetrieved.zip'" | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | — | Build.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Windows PowerShell Exit code: 1 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 3268 | "C:\WINDOWS\System32\SLUI.exe" RuleId=3482d82e-ca2c-4e1f-8864-da0267b484b2;Action=AutoActivate;AppId=55c92734-d682-4d71-983e-d6ec3f16059f;SkuId=4de7cb65-cdf1-4de9-8ae8-e3cce27b9f2c;NotificationInterval=1440;Trigger=TimerEvent | C:\Windows\System32\slui.exe | SppExtComObj.Exe | ||||||||||||
User: NETWORK SERVICE Company: Microsoft Corporation Integrity Level: SYSTEM Description: Windows Activation Client Exit code: 1 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 3900 | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe -WindowStyle Hidden -Command "Compress-Archive -Path 'C:\Users\admin\AppData\Local\Temp\Octalyn' -DestinationPath 'C:\Users\admin\AppData\Local\Temp\admin_OctalynRetrieved.zip'" | C:\Windows\System32\WindowsPowerShell\v1.0\powershell.exe | Build.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Windows PowerShell Exit code: 0 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 4528 | "C:\Users\admin\Desktop\Build.exe" | C:\Users\admin\Desktop\Build.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: HIGH Exit code: 0 Modules
| |||||||||||||||
| 5072 | "C:\Program Files\WinRAR\WinRAR.exe" C:\Users\admin\Desktop\Octalyn.rar | C:\Program Files\WinRAR\WinRAR.exe | explorer.exe | ||||||||||||
User: admin Company: Alexander Roshal Integrity Level: MEDIUM Description: WinRAR archiver Version: 5.91.0 Modules
| |||||||||||||||
| 5176 | "C:\Users\admin\Desktop\Octalyn.exe" | C:\Users\admin\Desktop\Octalyn.exe | explorer.exe | ||||||||||||
User: admin Integrity Level: HIGH Version: 1.0.0.0 Modules
| |||||||||||||||
| 5204 | \??\C:\WINDOWS\system32\conhost.exe 0xffffffff -ForceV1 | C:\Windows\System32\conhost.exe | — | powershell.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
| |||||||||||||||
Total events
12 691
Read events
12 683
Write events
8
Delete events
0
Modification events
| (PID) Process: | (5072) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 3 |
Value: C:\Users\admin\Desktop\preferences.zip | |||
| (PID) Process: | (5072) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 2 |
Value: C:\Users\admin\Desktop\chromium_ext.zip | |||
| (PID) Process: | (5072) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 1 |
Value: C:\Users\admin\Desktop\omni_23_10_2024_.zip | |||
| (PID) Process: | (5072) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 0 |
Value: C:\Users\admin\Desktop\Octalyn.rar | |||
| (PID) Process: | (5072) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | name |
Value: 120 | |||
| (PID) Process: | (5072) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | size |
Value: 80 | |||
| (PID) Process: | (5072) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | type |
Value: 120 | |||
| (PID) Process: | (5072) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | mtime |
Value: 100 | |||
Executable files
5
Suspicious files
52
Text files
9
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 4528 | Build.exe | C:\Users\admin\AppData\Local\Temp\Octalyn\discord.txt | — | |
MD5:— | SHA256:— | |||
| 4528 | Build.exe | C:\Users\admin\AppData\Local\Temp\0JLNGhe.db | — | |
MD5:— | SHA256:— | |||
| 4528 | Build.exe | C:\Users\admin\AppData\Local\Temp\Octalyn\passwords.txt | — | |
MD5:— | SHA256:— | |||
| 4528 | Build.exe | C:\Users\admin\AppData\Local\Temp\XP6FFds.db | — | |
MD5:— | SHA256:— | |||
| 5072 | WinRAR.exe | C:\Users\admin\Desktop\Octalyn.exe | executable | |
MD5:0A705E20864B451A3F3B845FA01C0AAD | SHA256:D61806D1A950940B21014131532FC0B99E6B090F40DABBE5CC5DC30018F29AF2 | |||
| 4528 | Build.exe | C:\Users\admin\AppData\Local\Temp\Octalyn\autofill.txt | — | |
MD5:— | SHA256:— | |||
| 4528 | Build.exe | C:\Users\admin\AppData\Local\Temp\qj6jb8a.db | binary | |
MD5:A45465CDCDC6CB30C8906F3DA4EC114C | SHA256:4412319EF944EBCCA9581CBACB1D4E1DC614C348D1DFC5D2FAAAAD863D300209 | |||
| 4528 | Build.exe | C:\Users\admin\AppData\Local\Temp\0JLNGhe.db-shm | binary | |
MD5:B7C14EC6110FA820CA6B65F5AEC85911 | SHA256:FD4C9FDA9CD3F9AE7C962B0DDF37232294D55580E1AA165AA06129B8549389EB | |||
| 5176 | Octalyn.exe | C:\Users\admin\Desktop\Build.exe | executable | |
MD5:A1697B68640809AD73802F15AAAB7188 | SHA256:641E1AD00A8094A73D535ECE579D5291AFA47374FF59B9A6486798A3EB3B6124 | |||
| 5176 | Octalyn.exe | C:\Users\admin\AppData\Local\Temp\OctalynStub_temp.exe | executable | |
MD5:A1697B68640809AD73802F15AAAB7188 | SHA256:641E1AD00A8094A73D535ECE579D5291AFA47374FF59B9A6486798A3EB3B6124 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
11
TCP/UDP connections
32
DNS requests
18
Threats
5
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
5496 | MoUsoCoreWorker.exe | GET | 200 | 2.19.194.200:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
2104 | svchost.exe | GET | 200 | 23.200.189.225:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
5496 | MoUsoCoreWorker.exe | GET | 200 | 23.200.189.225:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
5720 | SIHClient.exe | GET | 200 | 23.200.189.225:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl | unknown | — | — | whitelisted |
4528 | Build.exe | GET | 200 | 104.26.13.205:80 | http://api.ipify.org/?format=text | unknown | — | — | malicious |
— | — | GET | 200 | 23.200.189.225:80 | http://www.microsoft.com/pkiops/crl/MicSecSerCA2011_2011-10-18.crl | unknown | — | — | whitelisted |
6544 | svchost.exe | GET | 200 | 2.22.98.7:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | whitelisted |
5720 | SIHClient.exe | GET | 200 | 23.200.189.225:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | unknown | — | — | whitelisted |
5360 | backgroundTaskHost.exe | GET | 200 | 2.23.77.188:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEA77flR%2B3w%2FxBpruV2lte6A%3D | unknown | — | — | whitelisted |
444 | Build.exe | GET | 200 | 104.26.13.205:80 | http://api.ipify.org/?format=text | unknown | — | — | malicious |
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
Connections
PID | Process | IP | Domain | ASN | CN | Reputation |
|---|---|---|---|---|---|---|
4 | System | 192.168.100.255:137 | — | — | — | whitelisted |
— | — | 51.104.136.2:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
— | — | 2.19.194.200:80 | crl.microsoft.com | Akamai International B.V. | NL | whitelisted |
5496 | MoUsoCoreWorker.exe | 2.19.194.200:80 | crl.microsoft.com | Akamai International B.V. | NL | whitelisted |
— | — | 23.200.189.225:80 | www.microsoft.com | Moratelindo Internet Exchange Point | ID | whitelisted |
2104 | svchost.exe | 23.200.189.225:80 | www.microsoft.com | Moratelindo Internet Exchange Point | ID | whitelisted |
5496 | MoUsoCoreWorker.exe | 23.200.189.225:80 | www.microsoft.com | Moratelindo Internet Exchange Point | ID | whitelisted |
5496 | MoUsoCoreWorker.exe | 51.104.136.2:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | whitelisted |
4 | System | 192.168.100.255:138 | — | — | — | whitelisted |
3216 | svchost.exe | 172.211.123.250:443 | client.wns.windows.com | MICROSOFT-CORP-MSN-AS-BLOCK | FR | whitelisted |
DNS requests
Domain | IP | Reputation |
|---|---|---|
settings-win.data.microsoft.com |
| whitelisted |
google.com |
| whitelisted |
crl.microsoft.com |
| whitelisted |
www.microsoft.com |
| whitelisted |
client.wns.windows.com |
| whitelisted |
login.live.com |
| whitelisted |
ocsp.digicert.com |
| whitelisted |
slscr.update.microsoft.com |
| whitelisted |
fe3cr.delivery.mp.microsoft.com |
| whitelisted |
activation-v2.sls.microsoft.com |
| whitelisted |
Threats
PID | Process | Class | Message |
|---|---|---|---|
2196 | svchost.exe | Misc activity | ET INFO External IP Lookup Domain (ipify .org) in DNS Lookup |
4528 | Build.exe | Potential Corporate Privacy Violation | ET INFO External IP Lookup (ipify .org) |
444 | Build.exe | Potential Corporate Privacy Violation | ET INFO External IP Lookup (ipify .org) |
4528 | Build.exe | Device Retrieving External IP Address Detected | SUSPICIOUS [ANY.RUN] An IP address was received from the server as a result of an HTTP request |
444 | Build.exe | Device Retrieving External IP Address Detected | SUSPICIOUS [ANY.RUN] An IP address was received from the server as a result of an HTTP request |