MALICIOUS — virussign.com_41c8b4f495903a83f6f355762e017020.vir
MALICIOUS — virussign.com_41c8b4f495903a83f6f355762e017020.vir is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (99/100), attributed to the CeeInject family. 4 of 55 detection engines flagged it, exhibiting 4 ATT&CK techniques.
Identification
- SHA-256:
841ba6edc23618031166f51ddc6435f0eb2073e2fd1f67de5712bf2e84f8cbd6 - SHA-1:
3f2bcee90a72c1044e1c09fa01a3a0655021ee0b - MD5:
41c8b4f495903a83f6f355762e017020 - imphash:
118eb37b88640d7f3f7ac979ea5687cc - ssdeep:
384:yVxXXaxR3WyzLeReRDnnrFSJ2Y/mUNe5YINJUBBGJdaqD4h4q7oNEEI49Wbg:skjNiupSQY/BNEYWKBGzaqD4h4G7jg - TLSH:
T1C2304895CBA4A62EC297B80270D3588EF52127ADF524EA7B59D587314EF00337C31E98 - Submitted as: virussign.com_41c8b4f495903a83f6f355762e017020.vir
- File type: pe · Size: 36864 bytes
- Verdict: malicious (99/100) · Family: CeeInject
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 - Dropped a malicious payload (Rubinurd): tsk_4eb3b12791aa498e.exe - dynamic signal, weight 0.62, 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 15 external host(s) at runtime (14 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
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
- config.edge.skype.com
- licensing.mp.microsoft.com
- windows.msn.com
- oneocsp.microsoft.com
- www.msn.com
Dropped files
- C:\Users\analyst\AppData\Local\Temp\tsk_4eb3b12791aa498e.exe -
3e295fd68fdc8c0ce5145466eaf343b0e21d8cdb24628ddc3f6f62616138c086
Embedded URLs
- http://www.msftconnecttest.com/connecttest.txt
- http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
- http://rb.symcb.com/rb.crl
Embedded IP addresses
- 4.150.223.107
- 52.123.252.239
- 20.247.184.142
- 4.230.171.124
- 85.210.196.11
- 135.233.95.144
- 135.233.95.135
- 20.42.73.24
- 40.79.163.155
- 20.236.44.162
- 52.123.128.14
- 172.178.240.162
- 52.148.114.188
- 52.110.12.46
- 52.110.12.50
Registry keys
- HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run
File paths
- c:\temp\2015-05-01_22-53-25.dmp
More CeeInject samples · Latest analyzed threats · ATT&CK coverage
Analyzed on MalwareAnalyzer by Cyble · Open interactive report