#castleloader — Public Fediverse posts

FUD #CastleLoader being distributed via malvertizing.
785ba9c42deca8cfc69f1aafb371802782d01bc8156a67c5c0d412c5fb3b4e33

C2: astroflightvision[.]com

The signer, "Soft Insanity Oy" led us to find other FUD malware from November.
1/3

DNS-based staging via ClickFix represents tactical evolution.

Per Microsoft:
• Cmd.exe → nslookup execution
• Hardcoded external DNS resolver
• Payload embedded in DNS Name: response
• ZIP retrieval from azwsappdev[.]com
• Python-based reconnaissance
• VBScript persistence via Startup LNK
• ModeloRAT deployment
• Lumma Stealer distribution via CastleLoader (GrayBravo)

Campaign telemetry also discussed by Bitdefender and Kaspersky.

DNS offers:
• Reduced dependency on HTTP
• Traffic blending with legitimate queries
• Lightweight validation signaling

Detection priorities:
• Anomalous nslookup patterns
• External DNS resolver usage
• Suspicious Startup LNK creation
• DNS response content inspection

Is your EDR correlating DNS queries with process lineage?
Engage below.
Follow @technadu for advanced threat analysis.

#ThreatIntel #ClickFix #DNSStaging #ModeloRAT #LummaStealer #CastleLoader #DetectionEngineering #BlueTeam #SOC #Infosec #CyberOperations #MalwareAnalysis

DNS-based staging via ClickFix represents tactical evolution.

Per Microsoft:
• Cmd.exe → nslookup execution
• Hardcoded external DNS resolver
• Payload embedded in DNS Name: response
• ZIP retrieval from azwsappdev[.]com
• Python-based reconnaissance
• VBScript persistence via Startup LNK
• ModeloRAT deployment
• Lumma Stealer distribution via CastleLoader (GrayBravo)

Campaign telemetry also discussed by Bitdefender and Kaspersky.

DNS offers:
• Reduced dependency on HTTP
• Traffic blending with legitimate queries
• Lightweight validation signaling

Detection priorities:
• Anomalous nslookup patterns
• External DNS resolver usage
• Suspicious Startup LNK creation
• DNS response content inspection

Is your EDR correlating DNS queries with process lineage?
Engage below.
Follow @technadu for advanced threat analysis.

#ThreatIntel #ClickFix #DNSStaging #ModeloRAT #LummaStealer #CastleLoader #DetectionEngineering #BlueTeam #SOC #Infosec #CyberOperations #MalwareAnalysis

DNS-based staging via ClickFix represents tactical evolution.

Per Microsoft:
• Cmd.exe → nslookup execution
• Hardcoded external DNS resolver
• Payload embedded in DNS Name: response
• ZIP retrieval from azwsappdev[.]com
• Python-based reconnaissance
• VBScript persistence via Startup LNK
• ModeloRAT deployment
• Lumma Stealer distribution via CastleLoader (GrayBravo)

Campaign telemetry also discussed by Bitdefender and Kaspersky.

DNS offers:
• Reduced dependency on HTTP
• Traffic blending with legitimate queries
• Lightweight validation signaling

Detection priorities:
• Anomalous nslookup patterns
• External DNS resolver usage
• Suspicious Startup LNK creation
• DNS response content inspection

Is your EDR correlating DNS queries with process lineage?
Engage below.
Follow @technadu for advanced threat analysis.

#ThreatIntel #ClickFix #DNSStaging #ModeloRAT #LummaStealer #CastleLoader #DetectionEngineering #BlueTeam #SOC #Infosec #CyberOperations #MalwareAnalysis

DNS-based staging via ClickFix represents tactical evolution.

Per Microsoft:
• Cmd.exe → nslookup execution
• Hardcoded external DNS resolver
• Payload embedded in DNS Name: response
• ZIP retrieval from azwsappdev[.]com
• Python-based reconnaissance
• VBScript persistence via Startup LNK
• ModeloRAT deployment
• Lumma Stealer distribution via CastleLoader (GrayBravo)

Campaign telemetry also discussed by Bitdefender and Kaspersky.

DNS offers:
• Reduced dependency on HTTP
• Traffic blending with legitimate queries
• Lightweight validation signaling

Detection priorities:
• Anomalous nslookup patterns
• External DNS resolver usage
• Suspicious Startup LNK creation
• DNS response content inspection

Is your EDR correlating DNS queries with process lineage?
Engage below.
Follow @technadu for advanced threat analysis.

#ThreatIntel #ClickFix #DNSStaging #ModeloRAT #LummaStealer #CastleLoader #DetectionEngineering #BlueTeam #SOC #Infosec #CyberOperations #MalwareAnalysis

LummaStealer Is Getting a Second Life Alongside CastleLoader
#LummaStealer #CastleLoader
https://www.bitdefender.com/en-us/blog/labs/lummastealer-second-life-castleloader

📢⚠️ A new CastleLoader variant linked to at least 469 infections, hitting US government agencies and critical sectors across Europe.

Read: https://hackread.com/castleloader-variant-infections-critical-sectors/

#CyberSecurity #Malware #CastleLoader #USGov #Europe

CastleLoader Malware Now Uses Python Loader to Bypass Security https://hackread.com/castleloader-malware-python-loader-bypass-security/ #BlackpointCyber #Cybersecurity #CastleLoader #CyberAttack #Security #ClickFix #Malware #Windows #Python

CastleLoader malware, known for Clickfix related attack, has been upgraded with a stealthy Python loader that helps it slip past security defenses.

Read: https://hackread.com/castleloader-malware-python-loader-bypass-security/

#CyberSecurity #Malware #InfoSec #CastleLoader #ClickFix

Mentioned Malware Families: Stealc, CASTLELOADER, NightshadeC2

Aliases for Stealc: win.stealc
Malpedia link for Stealc: https://malpedia.caad.fkie.fraunhofer.de/details/win.stealc
Aliases for CASTLELOADER: win.castleloader
Malpedia link for CASTLELOADER: https://malpedia.caad.fkie.fraunhofer.de/details/win.castleloader
Aliases for NightshadeC2: win.nightshade_c2, CastleRAT
Malpedia link for NightshadeC2: https://malpedia.caad.fkie.fraunhofer.de/details/win.nightshade_c2

#Stealc #CASTLELOADER #NightshadeC2

Aliases provided by Malpedia.

Mentioned Malware Families: Stealc, CASTLELOADER, NightshadeC2

Aliases for Stealc: win.stealc
Malpedia link for Stealc: https://malpedia.caad.fkie.fraunhofer.de/details/win.stealc
Aliases for CASTLELOADER: win.castleloader
Malpedia link for CASTLELOADER: https://malpedia.caad.fkie.fraunhofer.de/details/win.castleloader
Aliases for NightshadeC2: win.nightshade_c2, CastleRAT
Malpedia link for NightshadeC2: https://malpedia.caad.fkie.fraunhofer.de/details/win.nightshade_c2

#Stealc #CASTLELOADER #NightshadeC2

Aliases provided by Malpedia.

Mentioned Malware Families: Stealc, CASTLELOADER, NightshadeC2

Aliases for Stealc: win.stealc
Malpedia link for Stealc: https://malpedia.caad.fkie.fraunhofer.de/details/win.stealc
Aliases for CASTLELOADER: win.castleloader
Malpedia link for CASTLELOADER: https://malpedia.caad.fkie.fraunhofer.de/details/win.castleloader
Aliases for NightshadeC2: win.nightshade_c2, CastleRAT
Malpedia link for NightshadeC2: https://malpedia.caad.fkie.fraunhofer.de/details/win.nightshade_c2

#Stealc #CASTLELOADER #NightshadeC2

Aliases provided by Malpedia.

Mentioned Malware Families: Stealc, CASTLELOADER, NightshadeC2

Aliases for Stealc: win.stealc
Malpedia link for Stealc: https://malpedia.caad.fkie.fraunhofer.de/details/win.stealc
Aliases for CASTLELOADER: win.castleloader
Malpedia link for CASTLELOADER: https://malpedia.caad.fkie.fraunhofer.de/details/win.castleloader
Aliases for NightshadeC2: win.nightshade_c2, CastleRAT
Malpedia link for NightshadeC2: https://malpedia.caad.fkie.fraunhofer.de/details/win.nightshade_c2

#Stealc #CASTLELOADER #NightshadeC2

Aliases provided by Malpedia.

Here's the full infection chain:

• 198.211.110.107:79 finger connects to finger[.]cloudyape[.]com
• 172.67.190.68:80 curl tries cloudyape[.]com/uvey.php?holt=2 but server responds with '301 Moved Permanently' and redirects to HTTPS
• 172.67.190.68:443 dropper download
• 172.67.190.68:80 curl gets cloudyape[.]com/uvey.php?holt=1 server redirects to HTTPS
• 172.67.190.68:443 dropper download
• 170.130.165.201:80 Download of file4.bin (#StealC) with fake GoogeBot user agent
• 170.130.165.201:80 #StealC v2 C2 / exfiltration
• 170.130.55.38:80 #CastleLoader traffic
• 194.76.227.242:9999 #CastleRAT C2 traffic

CastleLoader Malware Infects 469 Devices Using Fake GitHub Repos and ClickFix Phishing – Source:thehackernews.com https://ciso2ciso.com/castleloader-malware-infects-469-devices-using-fake-github-repos-and-clickfix-phishing-sourcethehackernews-com/ #rssfeedpostgeneratorecho #CyberSecurityNews #TheHackerNews #CastleLoader