MALICIOUS — tsk_4eb3b12791aa498e.exe
MALICIOUS — tsk_4eb3b12791aa498e.exe is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the Rubinurd family. 4 of 55 detection engines flagged it, exhibiting 4 ATT&CK techniques.
Identification
- SHA-256:
3e295fd68fdc8c0ce5145466eaf343b0e21d8cdb24628ddc3f6f62616138c086 - SHA-1:
6d60d9cd4d237b6e3ec1af00ec3f699a0d6260bb - MD5:
e84d1d7a4b80167e5dd381e6fe03dde0 - imphash:
118eb37b88640d7f3f7ac979ea5687cc - ssdeep:
384:yVxXSdBfzROR3WyzLeReRRnn77ikH7ruuDDv/7/R1bu4VA1SFIUaX4XpYg:sMHV4NiM77ikl/37/RRu4WSFgX4ag - TLSH:
T12E301598C724A55DD28B790232D3584EF25237ADB654DABB09C593748CF0873BC30E99 - Submitted as: tsk_4eb3b12791aa498e.exe
- File type: pe · Size: 36864 bytes
- Verdict: malicious (99/100) · Family: Rubinurd
Detections (4 of 55 engines)
- YARA: MalwareAnalyser built-in: Windows_Injection_Api_Combo
- ClamAV (daily): Win.Trojan.Rubinurd-67
- Microsoft Defender: VirTool:Win32/CeeInject.gen!DU
- Kaspersky (KVRT): HEUR:Trojan-Ransom.Win32.Blocker.gen
MITRE ATT&CK
YARA
- Windows_Injection_Api_Combo
Why this verdict
The malicious score of 99/100 is the fusion of 7 weighted signals:
- ClamAV (daily) flagged Win.Trojan.Rubinurd-67 (rule
Win.Trojan.Rubinurd-67) - engine signal, weight 0.90, confidence 0.95 - Process injection API combination (rule
Windows_Injection_Api_Combo) - yara signal, weight 0.65, confidence 0.90 - Observed at runtime: Windows Service (T1543.003) (rule
Windows Service) - dynamic signal, weight 0.40, confidence 0.90 - 1 behavioral detection(s): Windows Service Installation [medium] (rule
tl-service-install) - dynamic signal, weight 0.40, confidence 0.90 - Contacted 19 external host(s) at runtime (16 HTTP) - network signal, weight 0.40, confidence 0.80
- persist via registry run key (rule
persist via registry run key) - capa signal, weight 0.35, confidence 0.60 - Dropped 1 executable file(s) at runtime - dynamic signal, weight 0.20, confidence 0.60
Dynamic analysis (windows)
133 behavior events · 1 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
- ctldl.windowsupdate.com
- login.live.com
- ocsp.digicert.com
- desktop-hsgcbep
- v20.events.data.microsoft.com
- settings-win.data.microsoft.com
- licensing.mp.microsoft.com
- config.edge.skype.com
- windows.msn.com
- oneocsp.microsoft.com
Dropped files
- C:\Users\analyst\AppData\Local\Temp\tsk_0de3d9d25bb24521.exe -
62770b3d6be70bfa1ece44aac878534ad1b2d0ac60631b188b4edcc7424f0327
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=1787671479&P2=404&P3=2&P4=jmWFGCnn11dU7aow6JdGKCpu6jH4ykteu%2bjDDo4HTZllbsYAtdm6Jt0HGgyyruW6SqtZCXYjo8za0Ef0AxO3MA%3d%3d&cacheHostOrigin=msedge.b.tlu.dl.delivery.mp.microsoft.com
Embedded IP addresses
- 4.150.223.97
- 48.211.4.16
- 72.154.7.108
- 20.247.184.197
- 4.230.171.124
- 172.215.188.232
- 20.165.94.46
- 135.232.92.137
- 20.184.175.22
- 20.165.94.54
- 52.123.129.14
- 20.236.44.162
- 52.123.252.219
- 172.178.240.162
- 203.26.79.13
- 72.153.5.63
- 52.148.114.188
- 74.178.232.29
- 52.110.12.32
Registry keys
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
File paths
- c:\temp\2015-05-01_22-53-25.dmp
More Rubinurd samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report