MALICIOUS — 2fd3f4ee1525f6e5a59a546ca3140dbd25cb83fdc4f2e1c505ab0ad856ef7b3b
MALICIOUS — 2fd3f4ee1525f6e5a59a546ca3140dbd25cb83fdc4f2e1c505ab0ad856ef7b3b is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the Juko family. 4 of 55 detection engines flagged it, exhibiting 7 ATT&CK techniques.
Identification
- SHA-256:
2fd3f4ee1525f6e5a59a546ca3140dbd25cb83fdc4f2e1c505ab0ad856ef7b3b - SHA-1:
83f93f7516c9424cc4b292c5b0de2be6abf2e3e1 - MD5:
a7c5b488ee6c732f7453b4f3c90ae2c2 - imphash:
170193414cc4abf0ae27dc2a19d74879 - ssdeep:
768:qZL/0F24lercjO4sTZg5ZLvn2IuWZ0kqKNPWQHpr:OLsF2Kerc64sTiX2IV0Dhur - TLSH:
T1F62F396647309602F391A78B55403F4DB1B6A8EE3136C7518EE2B57E8BE045738B847C - Submitted as: 2fd3f4ee1525f6e5a59a546ca3140dbd25cb83fdc4f2e1c505ab0ad856ef7b3b
- File type: pe · Size: 32784 bytes
- Verdict: malicious (99/100) · Family: Juko
Detections (4 of 55 engines)
- ClamAV (daily): Win.Malware.Juko-9753236-0
- Microsoft Defender: flagged
- Emsisoft (Emergency Kit): Trojan.Downloader.JUKO
- Kaspersky (KVRT): HEUR:Trojan.Win32.SelfDel.gen
MITRE ATT&CK
Why this verdict
The malicious score of 99/100 is the fusion of 10 weighted signals:
- ClamAV (daily) flagged Win.Malware.Juko-9753236-0 (rule
Win.Malware.Juko-9753236-0) - engine signal, weight 0.90, confidence 0.95 - 3 behavioral detection(s): Registry Run Key Persistence [high] (rule
tl-run-key) - dynamic signal, weight 0.60, confidence 0.90 - Observed at runtime: Registry Run Key Persistence (T1547.001) (rule
Registry Run Key Persistence) - dynamic signal, weight 0.40, confidence 0.90 - Observed at runtime: Windows Service (T1543.003) (rule
Windows Service) - dynamic signal, weight 0.40, confidence 0.90 - Contacted 29 external host(s) at runtime (34 HTTP) - network signal, weight 0.40, confidence 0.80
- Anti-analysis: T1082, T1622, T1497.001, T1497 - dynamic signal, weight 0.40, confidence 0.75
- communicate over HTTP (rule
communicate over HTTP) - capa signal, weight 0.30, confidence 0.60 - enumerate processes (rule
enumerate processes) - capa signal, weight 0.20, confidence 0.60 - Dropped 1 executable file(s) at runtime - dynamic signal, weight 0.20, confidence 0.60
- Observed at runtime: Modify Registry (T1112) (rule
Modify Registry) - dynamic signal, weight 0.12, confidence 0.90
Dynamic analysis (windows)
15131 behavior events · 3 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
- i.assmio.com
- 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
Dropped files
- C:\Users\analyst\AppData\Roaming\Mozilla\WINWORD.exe -
8cf72431ee3465668c4f15be193fa4ed4adcec5bb12cfb95fbe9aa3aa7e6a99a
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/9a8a705c-852d-4d18-b32a-ee1d872f4bd9/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/9a8a705c-852d-4d18-b32a-ee1d872f4bd9?P1=1787938882&P2=404&P3=2&P4=UyLuJOt9afC6cG3XMiiqjDl3fc%2b2Qj0S5JH4F2wc3M0PLRPii46x9rHltQ8pZKHEV7vw5xpu1hzeN6aOagknKQ%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
- http://i.assmio.com/708F66AD88F60123000018EEAE065863.642K
- http://i.assmio.com/70ECB6A988F6031400002079D61B275E.758T
- http://i.assmio.com/30B506A78888E218000027EE8C4F45EE.html
- http://i.assmio.com/30B5A6A88888E24B000028829E64561C.436F
- http://i.assmio.com/311556AC8888E40900002F5D334A920B.shtm
- http://i.assmio.com/3115C6AA8888E42B00002FFE456FA19B.aspx
- http://203.26.79.13/filestreamingservice//files/51d86688-616b-47e3-abeb-3df16a1583c5/pieceshash?cacheHostOrigin=dl.delivery.mp.microsoft.com
- http://203.26.79.13/filestreamingservice/files/51d86688-616b-47e3-abeb-3df16a1583c5?P1=1787939020&P2=404&P3=2&P4=atM6sYZsf%2f2027lAO5Vahk5RVAVbeVY81CSiErKaz%2fYMOI%2fOYKc0JJsIqAbIHMXEhwXazj1xai1zay3cUYbaWw%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
- http://i.assmio.com/317B76AE8888E5EF000036BBDA49DD80.388M
Embedded domains
- i.assmio.com
Embedded IP addresses
- 51.116.246.106
- 57.155.104.224
- 4.230.171.124
- 52.253.84.76
- 40.84.97.4
- 52.168.117.170
- 74.178.76.128
- 74.178.76.54
- 52.123.128.14
- 20.236.44.162
- 52.123.129.14
- 40.103.64.242
- 162.159.142.9
- 52.182.143.212
- 203.26.79.13
- 172.178.240.163
- 52.148.114.188
- 40.84.85.40
- 20.184.175.17
- 4.150.223.102
- 135.234.160.246
- 172.233.212.224
- 135.233.95.80
- 72.154.7.16
- 52.110.12.33
More Juko samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report