SUSPICIOUS — virussign.com_2cb8f270f1272a15f0bf8add89f0ef80.vir
SUSPICIOUS — virussign.com_2cb8f270f1272a15f0bf8add89f0ef80.vir is a pe sample analyzed by MalwareAnalyzer by Cyble with a suspicious verdict (61/100), attributed to the HUILoader family. 5 of 55 detection engines flagged it, exhibiting 1 ATT&CK technique.
Identification
- SHA-256:
9916ed3fa3d228872202683d1d815cdb43ade67a74cae9d12dae35b3c9036d35 - SHA-1:
ba73a3fa216bd59d3db635a013ec9d6cb4c8baae - MD5:
2cb8f270f1272a15f0bf8add89f0ef80 - imphash:
71182308d2e3f39160c95a82544e73ae - ssdeep:
1536:GTcOVqnvawP4Djl0ZFpUBFoc+ogdBMlNG8KE8t2Ktv4NJW83:E/Enva2uOpMFo/RM3G8v8t2GOw83 - TLSH:
T15835025B611489E8FDEF01EBB471AB1EC611395D8DB6F13A025028B2C12F4EBF19429C - Submitted as: virussign.com_2cb8f270f1272a15f0bf8add89f0ef80.vir
- File type: pe · Size: 60416 bytes
- Verdict: suspicious (61/100) · Family: HUILoader
Source: VirusSign · first seen 2026-08-19T00:00:00.000Z · SHA-256 verified
Detections (5 of 55 engines)
- MalwareAnalyser heuristics (entropy/packer): UPX
- YARA: JPCERT/CC: JPCERT_HUILoader_PlugX_SideLoad
- Microsoft Defender: Trojan:Win32/Copak.GPAC!MTB
- Emsisoft (Emergency Kit): Gen:Variant.Barys.510186
- Kaspersky (KVRT): UDS:Trojan.Win32.Copak.cxnob
MITRE ATT&CK
Why this verdict
The suspicious score of 61/100 is the fusion of 4 weighted signals:
- Contacted 25 external host(s) at runtime (21 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 - 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)
111 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
- 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_e0cf5b529dcd46e7.exe -
08760e16614a125c1f0acf7d97c48f9ed49702c65cfa7ef6927c10f8ebf114dc - aa3ade9c8017fdaba4e908789a70cc2fd94b1f75631eb5fab724e70a7fe50809 -
aa3ade9c8017fdaba4e908789a70cc2fd94b1f75631eb5fab724e70a7fe50809 - fc1b9acb394de21d42986bb5c140fa7eb8297940f7ded3093ac153d6f9ecba60 -
fc1b9acb394de21d42986bb5c140fa7eb8297940f7ded3093ac153d6f9ecba60 - 6577bced8e6b4a8c1b39f877a6ec08a1f4773a79ef02fbed78b32e00db406897 -
6577bced8e6b4a8c1b39f877a6ec08a1f4773a79ef02fbed78b32e00db406897 - 71050424bd98e7b3dca784a0c7630bda05fa4737637a88c535af8ecf1895809a -
71050424bd98e7b3dca784a0c7630bda05fa4737637a88c535af8ecf1895809a
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=1787782840&P2=404&P3=2&P4=G%2bxLnyLrymybIQAiMsOWrPVsXgGuDtMkDFoCP%2b1Vz3onvoiWGG1ScBNHEjexVtDN6ujytF8igd8PrKI4B0iQ7w%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=1787782907&P2=404&P3=2&P4=INpJzGL51Us8HFO7iOwvX9InhkSTflwXTqZbU77cY9xFApr3GxDs555WKEF8romymF5csutiTMC1gXJ3prv4rw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded IP addresses
- 20.42.73.28
- 4.144.132.114
- 4.230.171.124
- 172.215.188.225
- 74.179.77.204
- 135.233.95.135
- 135.232.92.137
- 51.132.193.104
- 20.231.239.246
- 52.123.129.14
- 52.123.128.14
- 203.26.79.13
- 20.42.65.84
- 135.233.45.221
- 52.148.114.188
- 52.123.252.231
- 135.232.92.34
- 162.159.142.9
- 20.42.179.204
- 52.110.12.19
- 72.154.7.109
- 52.110.12.55
- 92.223.78.30
- 52.110.12.45
- 52.110.12.32
More HUILoader samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report