Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1528828
MD5: cf908a0717963422532a19539e6f4899
SHA1: f638142460df000c916f9f727f37e8b2e5751d84
SHA256: fbb46b56778e191d4e1f7a61d224557f282e0f812bec8d1d548041c870a039b1
Tags: elfMiraiuser-abuse_ch
Infos:

Detection

Score: 48
Range: 0 - 100
Whitelisted: false

Signatures

Multi AV Scanner detection for submitted file
Executes the "rm" command used to delete files or directories
Found strings indicative of a multi-platform dropper
Sample has stripped symbol table
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: na.elf ReversingLabs: Detection: 50%
Source: na.elf Virustotal: Detection: 37% Perma Link
Found strings indicative of a multi-platform dropper
Source: na.elf String: %s/%s/exe/usr/lib/systemd/systemd/usr/sbin/cron/usr/lib/policykit-1/polkitd/usr/bin/dbus-daemon/usr/lib/openssh/sshd/usr/bin/systemctl/usr/bin/bash/usr/sbin/sshd/usr/sbin/init/usr/sbin/apache2/usr/sbin/nginx/usr/sbin/dovecot/usr/sbin/postfix/usr/bin/vim/bin/sh/usr/sbin/snapd/bin/systemd/usr/bin/sudo/usr/sbin/rsyslogd/bin/kmod/usr/bin/wget/usr/bin/curl.S.Sx86_64.Sx86.Sppc.Sspc.Ssh4.Smpsl.Smips.Sarm7.Sarm6.Sarm5.Sarmkthreaddkworkermigrationidle_injectcpuhpksoftirqdoom_reaperkswapd0ksmdkhugepagedirqgjg*iavmwtvmrepa*jap
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: 192.168.2.23:42516 -> 109.202.202.202:80
Source: global traffic TCP traffic: 192.168.2.23:42836 -> 91.189.91.43:443
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 109.202.202.202
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.43
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 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: mal48.linELF@0/0@0/0
Executes the "rm" command used to delete files or directories
Source: /usr/bin/dash (PID: 6234) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.jFYWf2ZOp0 /tmp/tmp.dyJhbLDI6k /tmp/tmp.6fHhJDi2GF Jump to behavior
Source: /usr/bin/dash (PID: 6235) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.jFYWf2ZOp0 /tmp/tmp.dyJhbLDI6k /tmp/tmp.6fHhJDi2GF Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 6264) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 6264.1.00007ffd62613000.00007ffd62634000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-m68k/tmp/na.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/na.elf
Source: na.elf, 6264.1.000055893eea9000.000055893ef0d000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/m68k
Source: na.elf, 6264.1.00007ffd62613000.00007ffd62634000.rw-.sdmp Binary or memory string: /usr/bin/qemu-m68k
Source: na.elf, 6264.1.000055893eea9000.000055893ef0d000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/m68k

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
109.202.202.202
 unknown Switzerland
13030 INIT7CH false
91.189.91.43
 unknown United Kingdom
41231 CANONICAL-ASGB false
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false