user@threatcheck.sh ~ threat-analysis
bash
$ analyze-threat Trojan:Win64/CobaltStrikeBeacon!rfn
Trojan:Win64/CobaltStrikeBeacon!rfn - Windows Defender threat signature analysis

Trojan:Win64/CobaltStrikeBeacon!rfn - Windows Defender Threat Analysis

$ cat analysis.txt
=== THREAT ANALYSIS REPORT ===
Threat Name: Trojan:Win64/CobaltStrikeBeacon!rfn
Classification:
Type:Trojan
Platform:Win64
Family:CobaltStrikeBeacon
Detection Type:Concrete
Known malware family with identified signatures
Suffix:!rfn
Specific ransomware family name
Confidence:Very High
False-Positive Risk:Low

Concrete signature match: Trojan - Appears legitimate but performs malicious actions for 64-bit Windows platform, family CobaltStrikeBeacon

Summary:

This is a concrete detection of a Cobalt Strike Beacon, a sophisticated post-exploitation framework used by advanced threat actors. It utilizes various techniques for execution, persistence, and evasion, including leveraging legitimate Windows utilities like mshta, rundll32, regsvr32, PowerShell, BITS jobs, and scheduled tasks, as well as API hooking. Its presence indicates a confirmed system compromise.

Severity:
Critical
VDM Static Detection:
Relevant strings associated with this threat:
 - !#HSTR:StringCodeForMshta.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.C!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.L!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.O!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRegsvr32.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRundll32.A!pli (PEHSTR_EXT)
 - rundll32 (PEHSTR_EXT)
 - !#HSTR:StringCodeForBITSJobs.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForPowerShell.G!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForScheduledTask.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForDataEncoding.D!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.J!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.K!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteFileCopy.B!pli (PEHSTR_EXT)
 - !#HSTR:ExecutionGuardrails (PEHSTR_EXT)
 - !#HSTR:StringCodeForFileDeletion.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForHooking.M!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForNetshHelperDLL.A!pli (PEHSTR_EXT)
 - !#HSTR:StringCodeForRemoteServices.A!pli (PEHSTR_EXT)
Known malware which is associated with this threat:
Filename: 北京地铁运营公司-基于自主定位和自主感知的信号备用系统研究项目举报函.exe
bea27ed2fe4e48eebf79f045b50ab89be138596620155c3f47a75bf1b99ab824
22/12/2025
→VirusTotal↓Download Sample
Remediation Steps:
Immediately isolate the affected system from the network. Conduct a thorough incident response, including identifying the initial compromise vector, eradicating the beacon and any associated artifacts, and performing forensic analysis to understand the scope of the breach and any data exfiltration. Reset all compromised credentials and strengthen security controls.
=== END REPORT ===
$ reanalyze-threat
This analysis was last updated on 22/12/2025. Do you want to analyze it again?
$ ls available-commands/
→ cd /home
user@threatcheck.sh:~$ ▊