| File name: | UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.7z |
| Full analysis: | https://app.any.run/tasks/38acc699-dfa7-480d-89b4-f6bcc3476e63 |
| Verdict: | Malicious activity |
| Threats: | Remote access trojans (RATs) are a type of malware that enables attackers to establish complete to partial control over infected computers. Such malicious programs often have a modular design, offering a wide range of functionalities for conducting illicit activities on compromised systems. Some of the most common features of RATs include access to the users’ data, webcam, and keystrokes. This malware is often distributed through phishing emails and links. |
| Analysis date: | March 14, 2025, 22:27:21 |
| OS: | Windows 10 Professional (build: 19045, 64 bit) |
| Tags: | |
| Indicators: | |
| MIME: | application/x-7z-compressed |
| File info: | 7-zip archive data, version 0.4 |
| MD5: | C178527030A5DAB2714C3F85018F2093 |
| SHA1: | 2743044B2FD97CD293710D3CC9B464573206D1DE |
| SHA256: | DC0E8450FB24B66274A5ECC7B881B1518261E73DB5AC4893CF05A5C6A1E8DC85 |
| SSDEEP: | 24576:JsiAeGL8kHZazRIZkZ4t79ty5+D9YML5aFCxrRq2ulCp87IjWQiF2co0dqz59HsG:JsiAeGL8kHZazRIZkZ4t79ty5+D9YMLp |
MALICIOUS
SAINBOX has been detected
- UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe (PID: 8160)
SUSPICIOUS
Process drops legitimate windows executable
- WinRAR.exe (PID: 2564)
- UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe (PID: 8160)
Starts a Microsoft application from unusual location
- UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe (PID: 8160)
Executable content was dropped or overwritten
- UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe (PID: 8160)
Connects to unusual port
- UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe (PID: 8160)
INFO
The sample compiled with chinese language support
- WinRAR.exe (PID: 2564)
- UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe (PID: 8160)
Executable content was dropped or overwritten
- WinRAR.exe (PID: 2564)
Reads security settings of Internet Explorer
- BackgroundTransferHost.exe (PID: 8044)
- BackgroundTransferHost.exe (PID: 3676)
- BackgroundTransferHost.exe (PID: 6644)
- BackgroundTransferHost.exe (PID: 7680)
- BackgroundTransferHost.exe (PID: 7520)
Checks proxy server information
- BackgroundTransferHost.exe (PID: 3676)
Creates files or folders in the user directory
- BackgroundTransferHost.exe (PID: 3676)
Reads the software policy settings
- BackgroundTransferHost.exe (PID: 3676)
Manual execution by a user
- UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe (PID: 8160)
Checks supported languages
- UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe (PID: 8160)
Reads the computer name
- UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe (PID: 8160)
Find more information about signature artifacts and mapping to MITRE ATT&CK™ MATRIX at the full report
TRiD
| .7z | | | 7-Zip compressed archive (v0.4) (57.1) |
|---|---|---|
| .7z | | | 7-Zip compressed archive (gen) (42.8) |
EXIF
ZIP
| FileVersion: | 7z v0.04 |
|---|---|
| ModifyDate: | 2021:10:26 12:01:10+00:00 |
| ArchivedFileName: | UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe |
Total processes
141
Monitored processes
9
Malicious processes
1
Suspicious processes
0
Behavior graph
Click at the process to see the details
Process information
PID | CMD | Path | Indicators | Parent process | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 2564 | "C:\Program Files\WinRAR\WinRAR.exe" C:\Users\admin\Desktop\UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.7z | C:\Program Files\WinRAR\WinRAR.exe | explorer.exe | ||||||||||||
User: admin Company: Alexander Roshal Integrity Level: MEDIUM Description: WinRAR archiver Exit code: 0 Version: 5.91.0 Modules
| |||||||||||||||
| 3676 | "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1 | C:\Windows\System32\BackgroundTransferHost.exe | svchost.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Download/Upload Host Exit code: 1 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 6644 | "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1 | C:\Windows\System32\BackgroundTransferHost.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Download/Upload Host Exit code: 1 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7300 | C:\WINDOWS\system32\SppExtComObj.exe -Embedding | C:\Windows\System32\SppExtComObj.Exe | — | svchost.exe | |||||||||||
User: NETWORK SERVICE Company: Microsoft Corporation Integrity Level: SYSTEM Description: KMS Connection Broker Version: 10.0.19041.3996 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7332 | "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 Version: 10.0.19041.1 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7520 | "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1 | C:\Windows\System32\BackgroundTransferHost.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Download/Upload Host Exit code: 1 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 7680 | "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1 | C:\Windows\System32\BackgroundTransferHost.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Download/Upload Host Exit code: 1 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 8044 | "BackgroundTransferHost.exe" -ServerName:BackgroundTransferHost.1 | C:\Windows\System32\BackgroundTransferHost.exe | — | svchost.exe | |||||||||||
User: admin Company: Microsoft Corporation Integrity Level: MEDIUM Description: Download/Upload Host Exit code: 1 Version: 10.0.19041.3636 (WinBuild.160101.0800) Modules
| |||||||||||||||
| 8160 | "C:\Users\admin\Desktop\UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe" | C:\Users\admin\Desktop\UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe | explorer.exe | ||||||||||||
User: admin Company: Microsoft Corporation Integrity Level: HIGH Description: Bubbles Screen Save Version: 6.1.7601.17514 (win7sp1_rtm.101119-1850) Modules
| |||||||||||||||
Total events
3 128
Read events
3 093
Write events
35
Delete events
0
Modification events
| (PID) Process: | (2564) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 3 |
Value: C:\Users\admin\Desktop\preferences.zip | |||
| (PID) Process: | (2564) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 2 |
Value: C:\Users\admin\Desktop\chromium_ext.zip | |||
| (PID) Process: | (2564) 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: | (2564) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\ArcHistory |
| Operation: | write | Name: | 0 |
Value: C:\Users\admin\Desktop\UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.7z | |||
| (PID) Process: | (2564) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | name |
Value: 120 | |||
| (PID) Process: | (2564) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | size |
Value: 80 | |||
| (PID) Process: | (2564) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | type |
Value: 120 | |||
| (PID) Process: | (2564) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\FileList\FileColumnWidths |
| Operation: | write | Name: | mtime |
Value: 100 | |||
| (PID) Process: | (2564) WinRAR.exe | Key: | HKEY_CURRENT_USER\SOFTWARE\WinRAR\Interface |
| Operation: | write | Name: | ShowPassword |
Value: 0 | |||
| (PID) Process: | (8044) BackgroundTransferHost.exe | Key: | HKEY_CLASSES_ROOT\Local Settings\Software\Microsoft\Windows\CurrentVersion\AppContainer\Storage\microsoft.windows.contentdeliverymanager_cw5n1h2txyewy\Internet Settings\Cache\Content |
| Operation: | write | Name: | CachePrefix |
Value: | |||
Executable files
2
Suspicious files
5
Text files
0
Unknown types
0
Dropped files
PID | Process | Filename | Type | |
|---|---|---|---|---|
| 3676 | BackgroundTransferHost.exe | C:\Users\admin\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\AC\BackgroundTransferApi\460289fe-88dd-417d-a4e7-c31399a28685.down_data | — | |
MD5:— | SHA256:— | |||
| 3676 | BackgroundTransferHost.exe | C:\Users\admin\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\AC\Microsoft\CryptnetUrlCache\MetaData\26C212D9399727259664BDFCA073966E_F9F7D6A7ECE73106D2A8C63168CDA10D | binary | |
MD5:9853C21E071951244D322AD8FE6EAB57 | SHA256:2E0407F3D0F0F03C0CBABB424BB568F6504676A3AC822D748AFCA7FB989201D3 | |||
| 3676 | BackgroundTransferHost.exe | C:\Users\admin\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\AC\BackgroundTransferApi\56ab3859-d881-4c5e-8835-b2d7001865cb.up_meta_secure | binary | |
MD5:36F1336F222C1B3FA0163DF7B4219BA8 | SHA256:5C22979F504E190A483AB71ED453F2A4C9940A22E5654CF8390A6089CA615DAF | |||
| 2564 | WinRAR.exe | C:\Users\admin\AppData\Local\Temp\Rar$DRb2564.6104\UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe | executable | |
MD5:35FE9832459893C163B3FD5C62B3AEF1 | SHA256:9F8F3E6991F202215F940EE15AB04A96F29793E97CE4AC2C54BDF987E590DD73 | |||
| 3676 | BackgroundTransferHost.exe | C:\Users\admin\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\AC\BackgroundTransferApi\460289fe-88dd-417d-a4e7-c31399a28685.9143384e-e2a4-4d05-9019-e10fed995c75.down_meta | binary | |
MD5:122C4BB16D001D2F6A63BC68DE9CA767 | SHA256:B79B648134909C6D0E44AD00D248BC79E48C6CD8368CA2CE44D3FF7C03741976 | |||
| 3676 | BackgroundTransferHost.exe | C:\Users\admin\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\AC\Microsoft\CryptnetUrlCache\Content\26C212D9399727259664BDFCA073966E_F9F7D6A7ECE73106D2A8C63168CDA10D | binary | |
MD5:31B6B0A0AB7826FAB6E179D01CA4EDC7 | SHA256:FC3311F12DE01AB6E5074D70A8A20838971187819403982625A4FE89FF643223 | |||
| 3676 | BackgroundTransferHost.exe | C:\Users\admin\AppData\Local\Packages\Microsoft.Windows.ContentDeliveryManager_cw5n1h2txyewy\AC\BackgroundTransferApi\56ab3859-d881-4c5e-8835-b2d7001865cb.9143384e-e2a4-4d05-9019-e10fed995c75.down_meta | binary | |
MD5:122C4BB16D001D2F6A63BC68DE9CA767 | SHA256:B79B648134909C6D0E44AD00D248BC79E48C6CD8368CA2CE44D3FF7C03741976 | |||
| 8160 | UDS-Backdoor.Win32.Lotok.fet-9f8f3e6991f202215f940ee15ab04a96f29793e97ce4ac2c54bdf987e590dd73.exe | C:\Windows\SysWOW64\1107531.txt | executable | |
MD5:35FE9832459893C163B3FD5C62B3AEF1 | SHA256:9F8F3E6991F202215F940EE15AB04A96F29793E97CE4AC2C54BDF987E590DD73 | |||
Download PCAP, analyze network streams, HTTP content and a lot more at the full report
HTTP(S) requests
7
TCP/UDP connections
27
DNS requests
14
Threats
0
HTTP requests
PID | Process | Method | HTTP Code | IP | URL | CN | Type | Size | Reputation |
|---|---|---|---|---|---|---|---|---|---|
— | — | GET | 200 | 2.16.164.120:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
— | — | GET | 200 | 2.16.164.120:80 | http://crl.microsoft.com/pki/crl/products/MicRooCerAut2011_2011_03_22.crl | unknown | — | — | whitelisted |
7388 | backgroundTaskHost.exe | GET | 200 | 2.23.77.188:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBQ50otx%2Fh0Ztl%2Bz8SiPI7wEWVxDlQQUTiJUIBiV5uNu5g%2F6%2BrkS7QYXjzkCEAUZZSZEml49Gjh0j13P68w%3D | unknown | — | — | — |
3676 | BackgroundTransferHost.exe | GET | 200 | 2.23.77.188:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTrjrydRyt%2BApF3GSPypfHBxR5XtQQUs9tIpPmhxdiuNkHMEWNpYim8S8YCEAI5PUjXAkJafLQcAAsO18o%3D | unknown | — | — | whitelisted |
6544 | svchost.exe | GET | 200 | 2.23.77.188:80 | http://ocsp.digicert.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBSAUQYBMq2awn1Rh6Doh%2FsBYgFV7gQUA95QNVbRTLtm8KPiGxvDl7I90VUCEAJ0LqoXyo4hxxe7H%2Fz9DKA%3D | unknown | — | — | — |
7572 | SIHClient.exe | GET | 200 | 95.101.149.131:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Product%20Root%20Certificate%20Authority%202018.crl | unknown | — | — | — |
7572 | SIHClient.exe | GET | 200 | 95.101.149.131:80 | http://www.microsoft.com/pkiops/crl/Microsoft%20ECC%20Update%20Secure%20Server%20CA%202.1.crl | unknown | — | — | — |
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 | — | — | — | unknown |
— | — | 51.104.136.2:443 | settings-win.data.microsoft.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | unknown |
— | — | 2.16.164.120:80 | crl.microsoft.com | Akamai International B.V. | NL | unknown |
4 | System | 192.168.100.255:138 | — | — | — | unknown |
— | — | 40.115.3.253:443 | client.wns.windows.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | unknown |
6544 | svchost.exe | 20.190.159.128:443 | login.live.com | MICROSOFT-CORP-MSN-AS-BLOCK | IE | unknown |
6544 | svchost.exe | 2.23.77.188:80 | ocsp.digicert.com | AKAMAI-AS | DE | unknown |
7388 | backgroundTaskHost.exe | 20.31.169.57:443 | arc.msn.com | MICROSOFT-CORP-MSN-AS-BLOCK | NL | unknown |
7388 | backgroundTaskHost.exe | 2.23.77.188:80 | ocsp.digicert.com | AKAMAI-AS | DE | unknown |
3676 | BackgroundTransferHost.exe | 2.19.96.90:443 | www.bing.com | Akamai International B.V. | DE | unknown |
DNS requests
Domain | IP | Reputation |
|---|---|---|
google.com |
| unknown |
settings-win.data.microsoft.com |
| whitelisted |
crl.microsoft.com |
| unknown |
client.wns.windows.com |
| unknown |
login.live.com |
| unknown |
ocsp.digicert.com |
| unknown |
arc.msn.com |
| unknown |
www.bing.com |
| whitelisted |
slscr.update.microsoft.com |
| unknown |
www.microsoft.com |
| whitelisted |