SUSPICIOUS — virussign.com_4c00b5580394f73f208e016dd67f96c0.vir
SUSPICIOUS — virussign.com_4c00b5580394f73f208e016dd67f96c0.vir is a pe sample analyzed by MalwareAnalyzer by Cyble with a suspicious verdict (48/100). 4 of 55 detection engines flagged it, exhibiting 1 ATT&CK technique.
Identification
- SHA-256:
351861192bf6cc71db91cc110e706580cc27870e715be6bec31865c39546eb6b - SHA-1:
86444f07d2d6acdd5b87c54baa3f860bb12167ab - MD5:
4c00b5580394f73f208e016dd67f96c0 - imphash:
155a711bef5e76c35422d93e71d19027 - ssdeep:
1536:uEGeyKTtbGeePrFMRV/LhUq0Hr21uOHjmw:uEGWB6ehJ9UjawKjm - TLSH:
T1723502BBE989BA11DED6E5EF0AF3325C1199ACD38A9C8C4E2F64001176CAF57680011D - Submitted as: virussign.com_4c00b5580394f73f208e016dd67f96c0.vir
- File type: pe · Size: 60416 bytes
- Verdict: suspicious (48/100)
Source: VirusSign · first seen 2026-08-18T00:00:00.000Z · SHA-256 verified
Detections (4 of 55 engines)
- MalwareAnalyser heuristics (entropy/packer): UPX
- Microsoft Defender: Trojan:Win32/Copak.GPAC!MTB
- Emsisoft (Emergency Kit): Gen:Variant.Barys.510186
- Kaspersky (KVRT): HEUR:Trojan.Win32.Copak.pef
MITRE ATT&CK
Why this verdict
The suspicious score of 48/100 is the fusion of 3 weighted signals:
- Contacted 23 external host(s) at runtime (21 HTTP) - network signal, weight 0.40, confidence 0.80
- Packing/obfuscation: UPX, high-entropy-sections:UPX1 - static signal, weight 0.25, confidence 0.55
- Dropped 1 executable file(s) at runtime - dynamic signal, weight 0.20, confidence 0.60
Dynamic analysis (windows)
108 behavior events · 0 ATT&CK techniques · 5 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
- licensing.mp.microsoft.com
- config.edge.skype.com
- windows.msn.com
- oneocsp.microsoft.com
- www.msn.com
Dropped files
- C:\Users\analyst\AppData\Local\Temp\tsk_1129bb5614034aec.exe -
6f26963bc6ce6cdc9becca0ce389122d546174c34b0241ffe585ee22b962f897 - ee52cd681db67d0bff7f3676ed8683735c551dd77f86d3a30b8b5ea05b856311 -
ee52cd681db67d0bff7f3676ed8683735c551dd77f86d3a30b8b5ea05b856311 - a2c969d54e3075f7d1f93e0ed1d77a0077e5730453703c201a8e8c5143a45789 -
a2c969d54e3075f7d1f93e0ed1d77a0077e5730453703c201a8e8c5143a45789 - 9dcdf3cedb8b2436216067508fc436fcc0e38da402f60f1a83539fdc116b645c -
9dcdf3cedb8b2436216067508fc436fcc0e38da402f60f1a83539fdc116b645c - 6577bced8e6b4a8c1b39f877a6ec08a1f4773a79ef02fbed78b32e00db406897 -
6577bced8e6b4a8c1b39f877a6ec08a1f4773a79ef02fbed78b32e00db406897
Embedded URLs
- 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/753bb2df-a166-494f-aa7d-5678b1ef0c56/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/753bb2df-a166-494f-aa7d-5678b1ef0c56?P1=1787729377&P2=404&P3=2&P4=kmOvYCjBR6dagJh5Je4x6enzNXYP6CZdBdN4UOhVRHNT8gReDuWHqZ84tnCRaSmIKll4Rgwe2hlPsG3GhmFKcw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice//files/c74a5353-3e6a-42b7-94d6-9b96c560c89a/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/c74a5353-3e6a-42b7-94d6-9b96c560c89a?P1=1787729483&P2=404&P3=2&P4=SgVw68MgXvcgwd0C9a%2bBh99ZqJDMQGikK2uHtElDeCWdIZS%2btQobJ15v%2bZGa%2bsOpbIJTcsDi7M9BzxxykVhhqA%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded IP addresses
- 142.251.42.110
- 52.168.117.171
- 20.247.185.124
- 40.84.85.40
- 4.230.171.124
- 74.178.240.61
- 20.184.175.16
- 135.232.92.97
- 20.231.239.246
- 40.99.134.2
- 52.123.129.14
- 52.123.128.14
- 203.26.79.13
- 172.178.240.163
- 20.165.94.46
- 52.148.114.188
- 52.110.12.53
- 52.110.12.50
- 72.145.35.97
- 92.223.78.30
- 52.110.12.49
- 52.110.12.21
- 135.233.95.80
Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report