Linux Analysis Report
ppc.elf

Overview

General Information

Sample name: ppc.elf
Analysis ID: 1544028
MD5: fca3a13f964c784e1dd3535c18ba79fd
SHA1: d57cc0ad213106cf015bbd8211715cb6b859dc81
SHA256: 501bf20705d8ca8c8fb9c1bfb648cbfb96a67bd775c8b97619752ddaef62f2f1
Tags: elfuser-abuse_ch
Infos:

Detection

Score: 56
Range: 0 - 100
Whitelisted: false

Signatures

Multi AV Scanner detection for submitted file
Deletes system log files
Sample tries to access files in /etc/config/ (typical for OpenWRT routers)
Creates hidden files and/or directories
Enumerates processes within the "proc" file system
Executes the "rm" command used to delete files or directories
Found strings indicative of a multi-platform dropper
Sample has stripped symbol table
Sample listens on a socket
Sample tries to kill a process (SIGKILL)
Sleeps for long times indicative of sandbox evasion
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: ppc.elf ReversingLabs: Detection: 18%
Found strings indicative of a multi-platform dropper
Source: ppc.elf String: ash|login|wget|curl|tftp|ntpdate|ftp
Source: ppc.elf String: /proc//exe|ash|login|wget|curl|tftp|ntpdate|ftp/lib//lib64/
Sample listens on a socket
Source: /tmp/ppc.elf (PID: 5549) Socket: 127.0.0.1:1234 Jump to behavior
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Sample tries to kill a process (SIGKILL)
Source: /tmp/ppc.elf (PID: 5551) SIGKILL sent: pid: 933, result: successful Jump to behavior
Source: /tmp/ppc.elf (PID: 5638) SIGKILL sent: pid: 5636, result: successful Jump to behavior
Source: /tmp/ppc.elf (PID: 5646) SIGKILL sent: pid: 5644, result: successful Jump to behavior
Source: /tmp/ppc.elf (PID: 5676) SIGKILL sent: pid: 5674, result: successful Jump to behavior
Source: /tmp/ppc.elf (PID: 5708) SIGKILL sent: pid: 5706, result: successful Jump to behavior
Source: classification engine Classification label: mal56.evad.linELF@0/0@0/0

Data Obfuscation
barindex
Sample tries to access files in /etc/config/ (typical for OpenWRT routers)
Source: /tmp/ppc.elf (PID: 5553) File: /etc/config Jump to behavior
Creates hidden files and/or directories
Source: /tmp/ppc.elf (PID: 5553) Directory: /root/.cache Jump to behavior
Source: /tmp/ppc.elf (PID: 5553) Directory: /root/.ssh Jump to behavior
Source: /tmp/ppc.elf (PID: 5553) Directory: /root/.config Jump to behavior
Source: /tmp/ppc.elf (PID: 5553) Directory: /root/.local Jump to behavior
Source: /tmp/ppc.elf (PID: 5553) Directory: /tmp/.X11-unix Jump to behavior
Source: /tmp/ppc.elf (PID: 5553) Directory: /tmp/.Test-unix Jump to behavior
Source: /tmp/ppc.elf (PID: 5553) Directory: /tmp/.font-unix Jump to behavior
Source: /tmp/ppc.elf (PID: 5553) Directory: /tmp/.ICE-unix Jump to behavior
Source: /tmp/ppc.elf (PID: 5553) Directory: /tmp/.XIM-unix Jump to behavior
Source: /tmp/ppc.elf (PID: 5553) Directory: /etc/.java Jump to behavior
Enumerates processes within the "proc" file system
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/110/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/231/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/111/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/112/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/233/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/113/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/114/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/235/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/115/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/116/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/117/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/118/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/119/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/911/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/914/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/10/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/917/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/11/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/12/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/13/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/14/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/15/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/16/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/17/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/18/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/19/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/120/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/121/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/1/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/122/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/243/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/2/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/123/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/3/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/124/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/125/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/4/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/246/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/126/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/5/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/127/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/6/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/128/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/7/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/129/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/8/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/800/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/9/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/802/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/803/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/804/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/20/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/21/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/22/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/23/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/24/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/25/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/26/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/27/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/28/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/29/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/490/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/250/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/130/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/251/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/131/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/132/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/133/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/378/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/258/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/259/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/931/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/812/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/933/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/30/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/35/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/260/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/261/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/262/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/142/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/263/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/264/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/265/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/145/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/266/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/267/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/268/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/269/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/270/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/271/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/272/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/273/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/274/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/275/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/276/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/277/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/278/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/279/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/158/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/280/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/281/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/282/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/283/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/284/fd Jump to behavior
Source: /tmp/ppc.elf (PID: 5551) File opened: /proc/285/fd Jump to behavior
Executes the "rm" command used to delete files or directories
Source: /usr/bin/dash (PID: 5507) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.DM9Q5Mohm1 /tmp/tmp.VC2F28MSxW /tmp/tmp.mkdFGKy59o Jump to behavior
Source: /usr/bin/dash (PID: 5516) Rm executable: /usr/bin/rm -> rm -f /tmp/tmp.DM9Q5Mohm1 /tmp/tmp.VC2F28MSxW /tmp/tmp.mkdFGKy59o Jump to behavior

Hooking and other Techniques for Hiding and Protection
barindex
Deletes system log files
Source: /tmp/ppc.elf (PID: 5553) Log files deleted: /var/log/kern.log Jump to behavior
Sleeps for long times indicative of sandbox evasion
Source: /tmp/ppc.elf (PID: 5638) Sleeps longer then 60s: 60.0s Jump to behavior
Source: /tmp/ppc.elf (PID: 5676) Sleeps longer then 60s: 60.0s Jump to behavior
Source: /tmp/ppc.elf (PID: 5708) Sleeps longer then 60s: 60.0s Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/ppc.elf (PID: 5549) Queries kernel information via 'uname': Jump to behavior
Source: ppc.elf, 5549.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5636.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5638.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5644.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5646.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5674.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5676.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5706.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5708.1.000055ffa092e000.000055ffa09de000.rw-.sdmp Binary or memory string: !/etc/qemu-binfmt/ppc1
Source: ppc.elf, 5549.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5636.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5638.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5644.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5646.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5674.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5676.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5706.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5708.1.00007fffde895000.00007fffde8b6000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-ppc/tmp/ppc.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/ppc.elf
Source: ppc.elf, 5549.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5636.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5638.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5644.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5646.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5674.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5676.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5706.1.000055ffa092e000.000055ffa09de000.rw-.sdmp, ppc.elf, 5708.1.000055ffa092e000.000055ffa09de000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/ppc
Source: ppc.elf, 5549.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5636.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5638.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5644.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5646.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5674.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5676.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5706.1.00007fffde895000.00007fffde8b6000.rw-.sdmp, ppc.elf, 5708.1.00007fffde895000.00007fffde8b6000.rw-.sdmp Binary or memory string: /usr/bin/qemu-ppc
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