MALICIOUS — c31fa3e106577cf4e6dd82fb18a5b134c261b2f8a0468e43726c1c63d9ccba65

MALICIOUS — c31fa3e106577cf4e6dd82fb18a5b134c261b2f8a0468e43726c1c63d9ccba65 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: c31fa3e106577cf4e6dd82fb18a5b134c261b2f8a0468e43726c1c63d9ccba65
• SHA-1: dba2f5b791c8442e97b890711981854ce709388a
• MD5: a1728858909f719a031b7f222cdf7ca9
• ssdeep: 96:xy7T6T/vXhDGR8jyhwjYEDgB+3FK9oPb5OtO6UY4AKQksuKh9fa/j9mytM:87qvXhjyhwcxwFK4kO6UgksqMytM
• TLSH: T1411E6A096E31FEA60C91AF21425F35CAC6E061248002F0D0F9D95079EE7AF753DA5BE2
• Submitted as: c31fa3e106577cf4e6dd82fb18a5b134c261b2f8a0468e43726c1c63d9ccba65
• File type: script · Size: 6608 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/Boxter.HDQ!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/Boxter.HDQ!MTB (rule Trojan:PowerShell/Boxter.HDQ!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)

1126 behavior events · 0 ATT&CK techniques · 0 dropped files.

Runtime network

• www.msftconnecttest.com
• rb.symcd.com
• rb.symcb.com
• inference.location.live.net
• c.pki.goog
• x2.c.lencr.org
• ye.c.lencr.org
• yr.c.lencr.org
• 250.255.255.239.in-addr.arpa
• ntp.ubuntu.com
• desktop-hsgcbep._dosvc._tcp.local
• desktop-hsgcbep(1)._dosvc._tcp.local
• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl
• http://c.pki.goog/r/r1.crl
• http://x2.c.lencr.org/
• http://ye.c.lencr.org/
• http://c.pki.goog/wr2/9UVbN0w5E6Y.crl
• http://yr.c.lencr.org/

Embedded URLs

• http://www.msftconnecttest.com/connecttest.txt
• http://rb.symcd.com/MFEwTzBNMEswSTAJBgUrDgMCGgUABBTDRSYViRCZTxmZjLENmnwVjLly9QQU1MAGIknrOUvdk%2BJcobhHdglyA1gCEF0QyxjrOnkAh4OrdHf50xk%3D
• http://rb.symcb.com/rb.crl
• http://c.pki.goog/r/r1.crl
• http://x2.c.lencr.org/
• http://ye.c.lencr.org/
• http://c.pki.goog/wr2/9UVbN0w5E6Y.crl
• http://yr.c.lencr.org/

Embedded domains

• x2.c.lencr.org
• ye.c.lencr.org
• yr.c.lencr.org

Embedded IP addresses

• 172.172.255.216
• 40.84.85.40
• 135.234.160.247
• 20.42.179.204
• 20.184.175.22
• 4.247.188.233
• 85.210.196.11
• 72.145.35.97
• 4.144.132.223
• 52.110.12.46
• 4.230.171.124
• 40.84.97.4
• 4.207.44.69
• 72.153.5.141

File paths

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

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report