Linux Analysis Report
na.elf

Overview

General Information

Sample name: na.elf
Analysis ID: 1532116
MD5: a584520e5cb34228eb7078903c862b93
SHA1: 283c7c8ad4d513694be6003ce332726fdf7b1d3c
SHA256: f61ae304b8a9e1685ab8b0e7718df8fa7dad5829757616836d15b6183b8e8602
Tags: elfuser-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
Sample contains strings that are potentially command strings
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 Virustotal: Detection: 21% Perma Link
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 Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 443
Sample contains strings that are potentially command strings
Source: Initial sample Potential command found: ssh server is locked, please try again %dmin after !!!
Source: Initial sample Potential command found: X11 forwarding
Source: Initial sample Potential command found: X11 forwarding disabled in user configuration file.
Source: Initial sample Potential command found: X11 forwarding disabled in server configuration file.
Source: Initial sample Potential command found: X11 display already set.
Source: Initial sample Potential command found: X11 connection requested.
Source: Initial sample Potential command found: X11 connection from %.200s port %d
Source: Initial sample Potential command found: X11 connection rejected because of wrong authentication.
Source: Initial sample Potential command found: X11 rejected %d i%d/o%d
Source: Initial sample Potential command found: X11 closed %d i%d/o%d
Source: Initial sample Potential command found: X11 inet listener
Source: Initial sample Potential command found: X11 connection uses different authentication protocol.
Source: Initial sample Potential command found: X11 auth data does not match fake data.
Source: Initial sample Potential command found: X11 fake_data_len %d != saved_data_len %d
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: 6223) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.woJkVAa1Z6 /tmp/tmp.PjOycGhfr2 /tmp/tmp.tNpryRPH7p Jump to behavior
Source: /usr/bin/dash (PID: 6224) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.woJkVAa1Z6 /tmp/tmp.PjOycGhfr2 /tmp/tmp.tNpryRPH7p Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/na.elf (PID: 6252) Queries kernel information via 'uname': Jump to behavior
Source: na.elf, 6252.1.00007ffe1cb02000.00007ffe1cb23000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/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, 6252.1.0000556efe720000.0000556efe82c000.rw-.sdmp Binary or memory string: nU!/etc/qemu-binfmt/arm
Source: na.elf, 6252.1.0000556efe720000.0000556efe82c000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: na.elf, 6252.1.00007ffe1cb02000.00007ffe1cb23000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: na.elf, 6252.1.0000556efe720000.0000556efe82c000.rw-.sdmp Binary or memory string: rg.qemu.gdb.arm.sys.regs">
Source: na.elf, 6252.1.0000556efe720000.0000556efe82c000.rw-.sdmp Binary or memory string: nUrg.qemu.gdb.arm.sys.regs">

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