Linux Analysis Report
na.elf

ID:	1532510
Product:	CloudBasic
Start time:	15:19:09
Start date:	13.10.2024
Sample:	na.elf
Cookbook:	defaultlinuxfilecookbook.jbs
System description:	Ubuntu Linux 20.04 x64 (Kernel 5.4.0-72, Firefox 91.0, Evince Document Viewer 3.36.10, LibreOffice 6.4.7.2, OpenJDK 11.0.11)
Architecture:	LINUX
MD5:	b01ea76042e6377d1aaa8e097caeba3a
SHA1:	00a1fcfbfe8636a0a3aa494538f8ca1a721b118c
SHA256:	d480d0a47af9cddc5c06547f6bd7af53f9b5eba2276015732a9132d0f5760269
Filetype:	ELF Executable and Linkable format (generic) (4004/1) 100.00%

Name	Type	MD5	SHA1	SHA256

Spreading

Source: na.elf	String: ash|login|wget|curl|tftp|ntpdate
Source: na.elf	String: /proc//exe|ash|login|wget|curl|tftp|ntpdate/fdsocket|proc/usr/bin/usr/sbin/system/mnt/mtd/app/org/z/zbin/home/app/dvr/bin/duksan/userfs/mnt/app/usr/etc/dvr/main/usr/local/var/bin/tmp/sqfs/z/bin/dvr/mnt/mtd/zconf/gm/bin/home/process/var/challenge/usr/lib/lib/systemd//usr/lib/systemd/system/system/bin//mnt//home/helper/home/davinci/usr/libexec//sbin//bin/

Networking

Source: global traffic

TCP traffic: 156.244.16.207 ports 1,5,7,8,9,15987

Source: global traffic

TCP traffic: 192.168.2.23:47124 -> 156.244.16.207:15987

Source: /tmp/na.elf (PID: 6248)

Socket: 127.0.0.1:1234

Jump to behavior

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: global traffic	TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443

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: 192.3.165.37

Source: global traffic

DNS traffic detected: DNS query: 75cents.libre

Source: unknown	Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown	Network traffic detected: HTTP traffic on port 42836 -> 443

System Summary

Source: ELF static info symbol of initial sample

.symtab present: no

Source: classification engine

Classification label: sus23.troj.linELF@0/0@1/0

Persistence and Installation Behavior

Source: /usr/bin/dash (PID: 6236)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.gWYdqRNfSr /tmp/tmp.zlfH7XbY54 /tmp/tmp.0IyubbBDRk			Jump to behavior
Source: /usr/bin/dash (PID: 6237)	Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.gWYdqRNfSr /tmp/tmp.zlfH7XbY54 /tmp/tmp.0IyubbBDRk			Jump to behavior

Malware Analysis System Evasion

Source: /tmp/na.elf (PID: 6248)

Queries kernel information via 'uname':

Jump to behavior

Source: na.elf, 6248.1.000055e368535000.000055e368683000.rw-.sdmp	Binary or memory string: U!/etc/qemu-binfmt/arm
Source: na.elf, 6248.1.00007fff1000a000.00007fff1002b000.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, 6248.1.000055e368535000.000055e368683000.rw-.sdmp	Binary or memory string: /etc/qemu-binfmt/arm
Source: na.elf, 6248.1.00007fff1000a000.00007fff1002b000.rw-.sdmp	Binary or memory string: /usr/bin/qemu-arm