MALICIOUS — nz.sh

MALICIOUS — nz.sh is a shell sample analyzed by MalwareAnalyzer by Cyble with a malicious verdict (79/100). 3 of 53 detection engines flagged it, exhibiting 1 ATT&CK technique.

Identification

• SHA-256: fe98fedbcff5972438347ac96dcc0e024447c61e25bbd2549aabd86c4d760bc6
• SHA-1: dfee15b480c65c74158771e0e1ae05eec3a064d8
• MD5: 066d6cae80ec97c9c1ca5aa4b967a4e6
• ssdeep: 24:ItGPtsGd6dIhOEG1Y3GY/AGKDPsG2sGzTRzTGF7JGCoCGAGmKLGJRJNINksGwara:inDEx3UaWYTdTGFlv8LnJWrmVTBVXF
• TLSH: T1361670B8111A215D2EBE053812D3BDB246A6E18DFFF3EA7750C292C90729230FD06674
• Submitted as: nz.sh
• File type: shell · Size: 2729 bytes
• Verdict: malicious (79/100)

Detections (3 of 53 engines)

• Microsoft Defender: TrojanDownloader:Linux/ShWg.YB!MTB
• Emsisoft (Emergency Kit): Generic.Linux.Medusa.C.8DBC4B13
• Kaspersky (KVRT): HEUR:Trojan-Downloader.Shell.Agent.p

MITRE ATT&CK

• T1105

Why this verdict

The malicious score of 79/100 is the fusion of 5 weighted signals:

• 1 behavioral detection(s): Remote payload download (wget/curl) [medium] (rule tl-linux-download-cradle) - dynamic signal, weight 0.40, confidence 0.90
• Dropped a suspicious payload (Result): tmp_busybox - dynamic signal, weight 0.40, confidence 0.90
• Contacted 11 external host(s) at runtime (1 HTTP) - network signal, weight 0.40, confidence 0.80
• Embedded network infrastructure: http://31.56.209.153/nz/nz.x86, http://31.56.209.153/nz/nz.mips, http://31.56.209.153/nz/nz.arc - static signal, weight 0.35, confidence 0.60
• Extracted generic config (16 C2) (generic/advisory) - engine signal, weight 0.15, confidence 0.30

Dynamic analysis (linux)

924 behavior events · 0 ATT&CK techniques · 1 dropped files.

Runtime network

• b.f.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 2.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 3.0.0.0.1.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.0.2.0.f.f.ip6.arpa
• 252.0.0.224.in-addr.arpa
• desktop-hsgcbep
• ntp.ubuntu.com
• desktop-hsgcbep._dosvc._tcp.local
• 31.56.209.153/nz/nz.x86
• 31.56.209.153:80
• ff02::1:3
• 224.0.0.252
• 31.56.209.153
• 135.232.92.137
• 10.240.0.255
• 10.240.0.1
• 224.0.0.251
• ff02::fb
• ff02::16
• 169.254.255.255
• 74.178.240.61

Dropped files

• tmp_busybox - b3c1009e1b5c927e537487c80639cdf404f69e3eb49371d9be5d841672be3ff9

Embedded URLs

• http://31.56.209.153/nz/nz.x86
• http://31.56.209.153/nz/nz.mips
• http://31.56.209.153/nz/nz.arc
• http://31.56.209.153/nz/nz.i468
• http://31.56.209.153/nz/nz.i686
• http://31.56.209.153/nz/nz.x86_64
• http://31.56.209.153/nz/nz.mpsl
• http://31.56.209.153/nz/nz.arm
• http://31.56.209.153/nz/nz.arm5
• http://31.56.209.153/nz/nz.arm6
• http://31.56.209.153/nz/nz.arm7
• http://31.56.209.153/nz/nz.ppc
• http://31.56.209.153/nz/nz.spc
• http://31.56.209.153/nz/nz.m68k
• http://31.56.209.153/nz/nz.sh4

Embedded IP addresses

• 31.56.209.153
• 135.232.92.137
• 74.178.240.61
• 20.42.65.93
• 74.178.76.44
• 52.178.17.232
• 4.150.223.113
• 20.42.73.25
• 4.150.223.101
• 172.172.255.217

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Analyzed on MalwareAnalyzer by Cyble · Open interactive report