MALICIOUS — virussign.com_87adef1e255b489ba817726d1198f880.vir
MALICIOUS — virussign.com_87adef1e255b489ba817726d1198f880.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:
455cb76ded55f12b595e93b08fddfbd193b2009c949e6dc13e6a8153f4a6a861 - SHA-1:
85181bd33782606bedd54fdbaf686bccdaad5879 - MD5:
87adef1e255b489ba817726d1198f880 - imphash:
7431cb7edaabd6b387730d52f87364ed - ssdeep:
1536:Ut/XVKkooDEtgloCkH1kKynfAtid35IogdY:U5VKkohui3WZo8Lsd - TLSH:
T14035021F64980416CE5938C02E9AEC2DD9C0D4EBAA715CFDB9626418AA91D7B50D8313 - Submitted as: virussign.com_87adef1e255b489ba817726d1198f880.vir
- File type: pe · Size: 60416 bytes
- Verdict: malicious (79/100) · Family: Copak
Source: VirusSign · first seen 2026-08-19T00:00:00.000Z · 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 malicious score of 79/100 is the fusion of 4 weighted signals:
- Memory forensics: 5 finding(s), e.g. process hollowing in tsk_1dd563a56a (pid 3196) (rule
windows.hollowprocesses.HollowProcesses) - memory signal, weight 0.70, confidence 0.85 - Contacted 25 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)
103 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
- officeclient.microsoft.com
Dropped files
- C:\Users\analyst\AppData\Local\Temp\tsk_1dd563a56a8345c4.exe -
558d18b4428196cf260f4d97f5c257189ab439069b7777f7e87dcec4c583fc1c - d7e6b3bad3a0c5140512a639c23f477d7d6441b1c9fb5fc8937c5315fd6215d8 -
d7e6b3bad3a0c5140512a639c23f477d7d6441b1c9fb5fc8937c5315fd6215d8 - 5df4b8e4942be52e4481a2486d52b456c9ac53a6ba82872cc7d341ee564c654b -
5df4b8e4942be52e4481a2486d52b456c9ac53a6ba82872cc7d341ee564c654b - 6577bced8e6b4a8c1b39f877a6ec08a1f4773a79ef02fbed78b32e00db406897 -
6577bced8e6b4a8c1b39f877a6ec08a1f4773a79ef02fbed78b32e00db406897 - 9a32638effa17eab9d8947862ddc57d3766dbfcc16780fd7653802d37b550a7d -
9a32638effa17eab9d8947862ddc57d3766dbfcc16780fd7653802d37b550a7d - a24a7d53b722953a20f56faa045fac01b7a9770008037200d4eb1e540f9a0c13 -
a24a7d53b722953a20f56faa045fac01b7a9770008037200d4eb1e540f9a0c13
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=1787782146&P2=404&P3=2&P4=GT6qYUyG2fwriM7LFxTo09IoZbh0HXtCAofeNvGVfJeI4%2fG0xD6x%2bQTCcAPdz96D2hI4cAfWdLk%2bEgApDe%2fAdA%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=1787782228&P2=404&P3=2&P4=aNEHAKF%2fSvIYWxzYnwdP3O8Ze6YRXOFaE%2bp9%2fy%2f30qCF5zSvqrkbE6Zx17HHcYkA4Smip1bzBlsclZVsmqscRA%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded IP addresses
- 20.42.65.84
- 52.123.252.238
- 4.230.171.124
- 48.211.4.16
- 4.144.132.223
- 135.233.95.144
- 74.178.240.51
- 20.42.73.27
- 20.50.201.204
- 20.76.201.171
- 52.123.128.14
- 52.123.129.14
- 40.99.133.226
- 203.26.79.13
- 72.145.35.104
- 74.178.76.44
- 135.233.45.222
- 74.178.232.29
- 52.148.114.188
- 57.154.63.210
- 20.42.73.30
- 72.153.5.136
- 52.123.252.193
- 52.110.12.24
- 52.110.12.14
More Copak samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report