MALICIOUS — virussign.com_3d8e5e841bae0dd3f2776c780e829de0.vir
MALICIOUS — virussign.com_3d8e5e841bae0dd3f2776c780e829de0.vir is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (79/100), attributed to the Copak family. 4 of 55 detection engines flagged it, exhibiting 1 ATT&CK technique.
Identification
- SHA-256:
533afabc54631fd6c6a43bbc26b06ef3f88e0e6c665f413b8b5d2b05be5aadae - SHA-1:
c3bd52e8511218d488297d32581fc10e25edf2bf - MD5:
3d8e5e841bae0dd3f2776c780e829de0 - imphash:
7242f35f1cf898a0ffe2904f73cdb822 - ssdeep:
1536:Ha3i0q5yvrPA+oW8SNzoZhU3MKn60uDgVS9Y:6y5yvzA+GGqhU3Mq6sVS9 - TLSH:
T1ED35017A03358FA8FC53976C851DB83CC75447388900C1683FA3DA28243F92F9597A26 - Submitted as: virussign.com_3d8e5e841bae0dd3f2776c780e829de0.vir
- File type: pe · Size: 60416 bytes
- Verdict: malicious (79/100) · Family: Copak
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): UDS:Trojan.Win32.Copak
MITRE ATT&CK
Why this verdict
The malicious score of 79/100 is the fusion of 4 weighted signals:
- Memory forensics: 4 finding(s), e.g. process hollowing in tsk_30d752a04e (pid 8460) (rule
windows.hollowprocesses.HollowProcesses) - memory signal, weight 0.70, confidence 0.85 - Contacted 29 external host(s) at runtime (22 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)
110 behavior events · 0 ATT&CK techniques · 6 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
- windows.msn.com
- oneocsp.microsoft.com
- www.msn.com
- settings-win.data.microsoft.com
Dropped files
- C:\Users\analyst\AppData\Local\Temp\tsk_30d752a04ed74d84.exe -
dc5a8d75886854a3a0995e07d81dd4f206a903803dcdfb8f23aa2f9a575e23ba - 85917162f11fc5d5369bba1ea13c6b33149123f7e79d57822d0092efcfa0974c -
85917162f11fc5d5369bba1ea13c6b33149123f7e79d57822d0092efcfa0974c - e4d5d92e89f2b98e879e865c19fb27ae5e0cf820189c17baf45d909818e18a7d -
e4d5d92e89f2b98e879e865c19fb27ae5e0cf820189c17baf45d909818e18a7d - 58eeba775bbf0e0175c115b3bfc0238cc02c0a4dfd78e3c66a127a231f955b42 -
58eeba775bbf0e0175c115b3bfc0238cc02c0a4dfd78e3c66a127a231f955b42 - b105b27e2884b62b9a35ac0503ed9dd262291f63b3cb6f053ca7708c813f1d99 -
b105b27e2884b62b9a35ac0503ed9dd262291f63b3cb6f053ca7708c813f1d99 - c7fd2a0856bf8559510148f9302e8c385027d524241fcf9c2ec049a073b0fe73 -
c7fd2a0856bf8559510148f9302e8c385027d524241fcf9c2ec049a073b0fe73
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=1787732545&P2=404&P3=2&P4=WXdyNRZPZ2pW8gRR5QsBkqIdBxBbN7LrijH0e%2bReAYJxeXNNskGyMSoYtpv7XeAY4XfE02eCoTWoPx5CbyRvFw%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=1787732641&P2=404&P3=2&P4=dj%2fdKIcuzXUxUVebqycaOaQdfgj9EhaYx0HZH1pQqz0%2fiBL6eYBLsE%2bpQZxTW9OMu6AsXeiT%2bDaOVQRqjFJzTw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded IP addresses
- 51.116.253.168
- 52.123.252.226
- 20.42.179.204
- 4.230.171.124
- 52.253.84.76
- 40.84.97.4
- 135.233.95.144
- 20.184.175.20
- 20.112.250.133
- 52.123.129.14
- 52.123.128.14
- 172.178.240.161
- 74.178.240.51
- 4.150.223.112
- 52.123.252.227
- 172.66.2.5
- 162.159.142.9
- 203.26.79.13
- 52.148.114.188
- 52.123.252.219
- 74.179.71.159
- 52.110.12.10
- 52.110.12.5
- 72.153.5.129
- 40.84.85.40
More Copak samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report