MALICIOUS — virussign.com_38729a128de7ba69409cf720d3dd0990.vir
MALICIOUS — virussign.com_38729a128de7ba69409cf720d3dd0990.vir is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (96/100), attributed to the Expiro family. 6 of 55 detection engines flagged it, exhibiting 2 ATT&CK techniques.
Identification
- SHA-256:
1bbeb636a649eefcdfe8e727cb26c6760b1927d4a43e416b50f1d61298e155e8 - SHA-1:
c200283ae304a12365825c084e88fb07093855cd - MD5:
38729a128de7ba69409cf720d3dd0990 - imphash:
3801cf0cc42427f1569fb78d2d1b45a8 - ssdeep:
12288:HIxnQWjd3b0f4IueBrJY2LHothYANlqcYFIh9qB8PR/QCCIEcZt0TlvzO:6d3A7BrJY2LHobYANlqRb+rfEcOvK - TLSH:
T16452194015037AABE7EFB7111831579CF61772B926692B582F1AD01E406FF378BD208A - Submitted as: virussign.com_38729a128de7ba69409cf720d3dd0990.vir
- File type: pe · Size: 1001582 bytes
- Verdict: malicious (96/100) · Family: Expiro
Source: VirusSign · first seen 2026-08-21T00:00:00.000Z · SHA-256 verified
Detections (6 of 55 engines)
- capa (capabilities): capability:collection/keylog
- ClamAV (daily): Win.Ransomware.Expiro-9975896-0
- YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
- Microsoft Defender: Virus:Win64/Expiro.DE!MTB
- Emsisoft (Emergency Kit): Win64.Ransom.A
- Kaspersky (KVRT): HEUR:Trojan.Win64.AsowWiper.c
MITRE ATT&CK
Why this verdict
The malicious score of 96/100 is the fusion of 6 weighted signals:
- ClamAV (daily) flagged Win.Ransomware.Expiro-9975896-0 (rule
Win.Ransomware.Expiro-9975896-0) - engine signal, weight 0.90, confidence 0.95 - capture keystrokes (rule
capture keystrokes) - capa signal, weight 0.40, confidence 0.80 - Contacted 21 external host(s) at runtime (16 HTTP) - network signal, weight 0.40, confidence 0.80
- YARA: JPCERT/CC flagged JPCERT_HUILoader_PlugX_SideLoad (rule
JPCERT_HUILoader_PlugX_SideLoad) - engine signal, weight 0.35, confidence 0.70 - Embedded network infrastructure: http://www.7-zip.org/ - static signal, weight 0.35, confidence 0.60
- enumerate processes (rule
enumerate processes) - capa signal, weight 0.20, confidence 0.60
Dynamic analysis (windows)
32 behavior events · 0 ATT&CK techniques · 1 dropped files.
Runtime network
- www.msftconnecttest.com
- rb.symcd.com
- rb.symcb.com
- inference.location.live.net
- to-do.office.com
- staging.to-do.officeppe.com
- teams.cloud.microsoft
- outlook.office.com
- outlook.office365.com
- outlook.cloud.microsoft
- ctldl.windowsupdate.com
- login.live.com
- ocsp.digicert.com
- desktop-hsgcbep
- v20.events.data.microsoft.com
- config.edge.skype.com
- licensing.mp.microsoft.com
- windows.msn.com
- oneocsp.microsoft.com
- www.msn.com
Dropped files
- 363d7467c00fbde8c598ecc97418da05db711c106a6fd06bcb08360089170013 -
363d7467c00fbde8c598ecc97418da05db711c106a6fd06bcb08360089170013
Embedded URLs
- http://schemas.microsoft.com/SMI/2005/WindowsSettings
- http://www.7-zip.org/
- http://www.msftconnecttest.com/connecttest.txt
- http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
- http://rb.symcb.com/rb.crl
- http://203.26.79.13/filestreamingservice//files/fa5c4269-9d03-4a47-8d97-be6931f0b22c/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/fa5c4269-9d03-4a47-8d97-be6931f0b22c?P1=1787935695&P2=404&P3=2&P4=iPUwKIRPzcuFdWAV1iyHGce1KY%2fJeywhzkf%2fNxBMMhngHfgXJXjSxXpNMPrfkQyIkZwp%2b1%2b1a%2b2hMnMw7OkKBw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded domains
- ug.mi.oc.co
- schemas.microsoft.com
- www.7-zip.org
Embedded IP addresses
- 51.11.192.49
- 52.123.252.246
- 52.253.84.76
- 40.84.97.4
- 4.230.171.124
- 135.233.95.144
- 4.150.223.112
- 74.178.240.51
- 52.168.117.171
- 20.231.239.246
- 52.123.128.14
- 52.123.129.14
- 52.123.252.213
- 203.26.79.13
- 135.233.45.221
- 20.165.94.46
- 135.234.160.244
- 72.154.7.108
- 52.148.114.188
- 52.110.12.10
- 52.110.12.4
More Expiro samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report