MALICIOUS — virussign.com_4cd516decf45a3955c613a5a6556d500.vir

MALICIOUS — virussign.com_4cd516decf45a3955c613a5a6556d500.vir is a pe sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (96/100), attributed to the Rubinurd family. 5 of 52 detection engines flagged it, exhibiting 2 ATT&CK techniques.

Identification

• SHA-256: 5f623d0e86ad128b1bdd5ec6d307d4d621a4be6bcd5027a53a3d25a4703d40b4
• SHA-1: 04a6837d56759acb9d314fb9dd73b1afa351426e
• MD5: 4cd516decf45a3955c613a5a6556d500
• imphash: 118eb37b88640d7f3f7ac979ea5687cc
• ssdeep: 384:yVxX9D2Iwai3WyzLeReRGnnMgoky+SBF2ooy+LGalzxBeCcgQ3ZhcmSQg:s7iNi9VokXSD2Ny+3dnRwJhcm9g
• TLSH: T16F304A94C710A69DD69BB00234D38A8EF15267AEF424D9B768D983308CF1833BC75D99
• Submitted as: virussign.com_4cd516decf45a3955c613a5a6556d500.vir
• File type: pe · Size: 36864 bytes
• Verdict: malicious (96/100) · Family: Rubinurd

Source: VirusSign · first seen 2026-08-07T00:00:00.000Z · SHA-256 verified

Detections (5 of 52 engines)

• YARA: MalwareAnalyser built-in: Windows_Injection_Api_Combo
• ClamAV (daily): Win.Trojan.Rubinurd-67
• YARA: MalwareAnalyser community pack: TL_Shellcode_VirtualAlloc_Exec
• Microsoft Defender: VirTool:Win32/CeeInject.gen!DU
• Kaspersky (KVRT): HEUR:Trojan-Ransom.Win32.Blocker.gen

MITRE ATT&CK

• T1547.001
• T1055

YARA

• Windows_Injection_Api_Combo

Why this verdict

The malicious score of 96/100 is the fusion of 4 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
• YARA: MalwareAnalyser community pack flagged TL_Shellcode_VirtualAlloc_Exec (rule TL_Shellcode_VirtualAlloc_Exec) - engine signal, weight 0.35, confidence 0.70
• persist via registry run key (rule persist via registry run key) - capa signal, weight 0.35, confidence 0.60

Dynamic analysis

No runtime behaviour was captured for this sample, so the analysis above is static only. That is a limit of this run rather than evidence the sample does nothing.

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