MALICIOUS — tsk_05ba7e684e334e27.exe

MALICIOUS — tsk_05ba7e684e334e27.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: c1f5182ddd0b075d66d04f11e7f15052c66718f5479cc90572be90a4f7c59a9a
SHA-1: 720f6ed0c69faa1a334b90047288e682fc32ba29
MD5: 45dd2b3aeffaee9c0b4e33fb1e246bf0
imphash: 118eb37b88640d7f3f7ac979ea5687cc
ssdeep: 384:yVxXxdOYD3WyzLeReRunnUDDBVEJmsr3cab0rzwK1m7Y2u5aef4cFVbggxofg:sLDNitWDBVlsr3Lv852u5abcFVbg7g
TLSH: T15D30499AC760961EC657745270D358AEF02227AEF558E9BB08D507308DF0473BC31E89
Submitted as: tsk_05ba7e684e334e27.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 18 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
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.

Dropped files

C:\Users\analyst\AppData\Local\Temp\tsk_dba2f333cdf140eb.exe - d274212db989ba711836f15a1afb7d3e06d89ad2445644e95dde200ccdad52d8

Embedded URLs

http://www.msftconnecttest.com/connecttest.txt
http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
http://rb.symcb.com/rb.crl

Embedded IP addresses

20.184.175.4
57.155.101.212
4.230.171.124
4.144.132.114
135.233.95.144
20.165.94.54
20.42.65.85
20.236.44.162
40.99.133.226
40.103.64.242
52.123.129.14
20.42.65.88
135.233.45.222
92.223.78.30
52.148.114.188
172.66.2.5
52.110.12.5
162.159.142.9

Registry keys

HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Run

File paths

c:\temp\2015-05-01_22-53-25.dmp

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report