MALICIOUS — fe83331356631a610837fff09d453bb25a998d625739f3c01b909dd835bdef18

MALICIOUS — fe83331356631a610837fff09d453bb25a998d625739f3c01b909dd835bdef18 is a script sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (94/100), attributed to the Base64 family. 4 of 54 detection engines flagged it, exhibiting 1 ATT&CK technique.

Identification

• SHA-256: fe83331356631a610837fff09d453bb25a998d625739f3c01b909dd835bdef18
• SHA-1: 28f4400bc5cb21b065840b4dd12d8d0323441a1b
• MD5: da91072c84ef89e7fdd88a3dbe11e144
• ssdeep: 96:xDT6T/vXhDGR8jyhwjY7KGDxhAX1yfV1T6z1R+E6V5DqegqZ3nL+SaTwMXh0:5qvXhjyhwcN1I6k5S3LKTwMXh0
• TLSH: T11D1D9E096D71BEA60D51AF21429F36CAC1E161648001F0D0FDD89079EE7AF713EA5BE2
• Submitted as: fe83331356631a610837fff09d453bb25a998d625739f3c01b909dd835bdef18
• File type: script · Size: 6265 bytes
• Verdict: malicious (94/100) · Family: Base64

Detections (4 of 54 engines)

• capa (capabilities): capability:execution/powershell
• YARA: MalwareAnalyser community pack: TL_Base64_EncodedCommand
• Microsoft Defender: Trojan:PowerShell/Rozena.HNAB!MTB
• Kaspersky (KVRT): HEUR:Trojan.PowerShell.Generic

MITRE ATT&CK

• T1059.001

Why this verdict

The malicious score of 94/100 is the fusion of 6 weighted signals:

• Microsoft Defender flagged Trojan:PowerShell/Rozena.HNAB!MTB (rule Trojan:PowerShell/Rozena.HNAB!MTB) - engine signal, weight 0.55, confidence 0.85
• Kaspersky (KVRT) flagged HEUR:Trojan.PowerShell.Generic (rule HEUR:Trojan.PowerShell.Generic) - engine signal, weight 0.55, confidence 0.85
• Obfuscated powershell script: shellcode-injection (layers: powershell-encodedcommand+base64) (rule script-deobfuscation) - static signal, weight 0.55, confidence 0.75
• execute via PowerShell (rule execute via PowerShell) - capa signal, weight 0.40, confidence 0.80
• YARA: MalwareAnalyser community pack flagged TL_Base64_EncodedCommand (rule TL_Base64_EncodedCommand) - engine signal, weight 0.45, confidence 0.70
• capa (capabilities) flagged capability:execution/powershell (rule capability:execution/powershell) - engine signal, weight 0.35, confidence 0.70

Dynamic analysis (windows)

1122 behavior events · 0 ATT&CK techniques · 0 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• inference.location.live.net
• 250.255.255.239.in-addr.arpa
• ntp.ubuntu.com
• desktop-hsgcbep
• desktop-hsgcbep._dosvc._tcp.local
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl
• 23.40.52.209
• 23.11.37.157
• 20.190.167.20
• 52.123.252.248 AU · Sydney · AS8075 Microsoft Corporation
• 23.33.238.178
• 52.110.12.22 AU · Sydney · AS8075 Microsoft Corporation
• 4.230.171.124 KR · Seoul · AS8075 Microsoft Corporation
• 23.33.238.171
• 52.230.59.222 SG · Singapore · AS8075 Microsoft Corporation

Embedded URLs

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

Embedded IP addresses

• 72.145.35.107
• 52.123.252.248
• 52.110.12.22
• 4.230.171.124
• 52.230.59.222
• 172.215.188.232

File paths

• C:\\Windows\\System32\\WindowsPowerShell\\v1.0\\powershell.exe\

More Base64 samples · Latest analyzed threats · ATT&CK coverage

Analyzed on MalwareAnalyzer by Cyble · Open interactive report