Linux Analysis Report
rfixnaMj52.elf

Overview

General Information

Sample Name: rfixnaMj52.elf
Original Sample Name: fb339cf69c95dc0cfc2e39212b653781.elf
Analysis ID: 831161
MD5: fb339cf69c95dc0cfc2e39212b653781
SHA1: c3dfc45c904bf581cdc2cd4bb4ae3cd04ae5072c
SHA256: f01dd98cb5003b692b097c3e9e2493ddd041511d4e1b2874d85fb6e1bbfd3a9b
Tags: 32elfmipsmirai
Infos:

Detection

Gafgyt, Mirai
Score: 76
Range: 0 - 100
Whitelisted: false

Signatures

Malicious sample detected (through community Yara rule)
Yara detected Mirai
Multi AV Scanner detection for submitted file
Yara detected Gafgyt
Opens /proc/net/* files useful for finding connected devices and routers
Yara signature match
Sample contains strings that are user agent strings indicative of HTTP manipulation
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

Classification

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: rfixnaMj52.elf ReversingLabs: Detection: 64%
Source: rfixnaMj52.elf Virustotal: Detection: 65% Perma Link

Spreading
barindex
Opens /proc/net/* files useful for finding connected devices and routers
Source: /tmp/rfixnaMj52.elf (PID: 6225) Opens: /proc/net/route Jump to behavior
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: 192.168.2.23:60738 -> 31.214.243.29:4258
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: 31.214.243.29
Source: unknown TCP traffic detected without corresponding DNS query: 31.214.243.29
Source: unknown TCP traffic detected without corresponding DNS query: 31.214.243.29
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 31.214.243.29
Source: unknown TCP traffic detected without corresponding DNS query: 31.214.243.29
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: 31.214.243.29
Source: unknown TCP traffic detected without corresponding DNS query: 31.214.243.29
Source: unknown TCP traffic detected without corresponding DNS query: 31.214.243.29
Source: unknown TCP traffic detected without corresponding DNS query: 31.214.243.29
Source: unknown TCP traffic detected without corresponding DNS query: 31.214.243.29
Source: unknown TCP traffic detected without corresponding DNS query: 31.214.243.29
Source: rfixnaMj52.elf String found in binary or memory: http://fast.no/support/crawler.asp)
Source: rfixnaMj52.elf String found in binary or memory: http://feedback.redkolibri.com/
Source: rfixnaMj52.elf String found in binary or memory: http://www.baidu.com/search/spider.htm)
Source: rfixnaMj52.elf String found in binary or memory: http://www.baidu.com/search/spider.html)
Source: rfixnaMj52.elf String found in binary or memory: http://www.billybobbot.com/crawler/)

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: rfixnaMj52.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: rfixnaMj52.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: 6225.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 6225.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: 6227.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 6227.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: Process Memory Space: rfixnaMj52.elf PID: 6225, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: rfixnaMj52.elf PID: 6225, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Source: Process Memory Space: rfixnaMj52.elf PID: 6227, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: rfixnaMj52.elf PID: 6227, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_ea92cca8 Author: unknown
Yara signature match
Source: rfixnaMj52.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: rfixnaMj52.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: 6225.1.00007f22f0400000.00007f22f0415000.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: 6225.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: 6227.1.00007f22f0400000.00007f22f0415000.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: 6227.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: Process Memory Space: rfixnaMj52.elf PID: 6225, 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
Source: Process Memory Space: rfixnaMj52.elf PID: 6225, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: Process Memory Space: rfixnaMj52.elf PID: 6227, 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
Source: Process Memory Space: rfixnaMj52.elf PID: 6227, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_ea92cca8 os = linux, severity = x86, creation_date = 2021-01-12, scan_context = file, memory, license = Elastic License v2, threat_name = Linux.Trojan.Gafgyt, fingerprint = aa4aee9f3d6bedd8234eaf8778895a0f5d71c42b21f2a428f01f121e85704e8e, id = ea92cca8-bba7-4a1c-9b88-a2d051ad0021, last_modified = 2021-09-16
Source: classification engine Classification label: mal76.spre.troj.linELF@0/1@0/0
Source: rfixnaMj52.elf ELF static info symbol of initial sample: libc/string/mips/memcpy.S
Source: rfixnaMj52.elf ELF static info symbol of initial sample: libc/string/mips/memset.S
Source: rfixnaMj52.elf ELF static info symbol of initial sample: libc/sysdeps/linux/mips/crt1.S
Source: rfixnaMj52.elf ELF static info symbol of initial sample: libc/sysdeps/linux/mips/crti.S
Source: rfixnaMj52.elf ELF static info symbol of initial sample: libc/sysdeps/linux/mips/crtn.S
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/rfixnaMj52.elf (PID: 6225) Queries kernel information via 'uname': Jump to behavior
Source: rfixnaMj52.elf, 6225.1.00007ffe1d148000.00007ffe1d169000.rw-.sdmp Binary or memory string: /tmp/qemu-open.z1piFU
Source: rfixnaMj52.elf, 6225.1.000056053ff80000.0000560540007000.rw-.sdmp, rfixnaMj52.elf, 6227.1.000056053ff80000.0000560540007000.rw-.sdmp Binary or memory string: V!/etc/qemu-binfmt/mips
Source: rfixnaMj52.elf, 6225.1.000056053ff80000.0000560540007000.rw-.sdmp, rfixnaMj52.elf, 6227.1.000056053ff80000.0000560540007000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/mips
Source: rfixnaMj52.elf, 6225.1.00007ffe1d148000.00007ffe1d169000.rw-.sdmp Binary or memory string: V/tmp/qemu-open.z1piFU\
Source: rfixnaMj52.elf, 6225.1.00007ffe1d148000.00007ffe1d169000.rw-.sdmp, rfixnaMj52.elf, 6227.1.00007ffe1d148000.00007ffe1d169000.rw-.sdmp Binary or memory string: /usr/bin/qemu-mips
Source: rfixnaMj52.elf, 6225.1.00007ffe1d148000.00007ffe1d169000.rw-.sdmp, rfixnaMj52.elf, 6227.1.00007ffe1d148000.00007ffe1d169000.rw-.sdmp Binary or memory string: dx86_64/usr/bin/qemu-mips/tmp/rfixnaMj52.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/rfixnaMj52.elf

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: rfixnaMj52.elf, type: SAMPLE
Source: Yara match File source: 6225.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 6227.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY
Yara detected Gafgyt
Source: Yara match File source: rfixnaMj52.elf, type: SAMPLE
Source: Yara match File source: 6225.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 6227.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY
Sample contains strings that are user agent strings indicative of HTTP manipulation
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/65.0.3325.181 Safari/537.36
Source: Initial sample User agent string found: Opera/9.80 (X11; Linux i686; Ubuntu/14.10) Presto/2.12.388 Version/12.16
Source: Initial sample User agent string found: Mozilla/5.0 (Windows; U; Windows NT 6.1; rv:2.2) Gecko/20110201
Source: Initial sample User agent string found: Opera/9.80 (Windows NT 5.2; U; ru) Presto/2.5.22 Version/10.51
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/41.0.2228.0 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; Trident/7.0; AS; rv:11.0) like Gecko
Source: Initial sample User agent string found: Mozilla/5.0 (Android; Linux armv7l; rv:9.0) Gecko/20111216 Firefox/9.0 Fennec/9.0
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 5.1) AppleWebKit/536.5 (KHTML, like Gecko) Chrome/19.0.1084.56 Safari/536.5
Source: Initial sample User agent string found: Opera/9.80 (Windows NT 5.1; U; en) Presto/2.10.229 Version/11.60
Source: Initial sample User agent string found: Mozilla/5.0 (iPad; U; CPU OS 5_1 like Mac OS X) AppleWebKit/531.21.10 (KHTML, like Gecko) Version/4.0.4 Mobile/7B367 Safari/531.21.10 UCBrowser/3.4.3.532
Source: Initial sample User agent string found: Mozilla/5.0 (Nintendo WiiU) AppleWebKit/536.30 (KHTML, like Gecko) NX/3.0.4.2.12 NintendoBrowser/4.3.1.11264.US
Source: Initial sample User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.6; rv:25.0) Gecko/20100101 Firefox/25.0
Source: Initial sample User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 5.1; pl) Opera 11.00
Source: Initial sample User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; en) Opera 11.00
Source: Initial sample User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.0; ja) Opera 11.00
Source: Initial sample User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; cn) Opera 11.00
Source: Initial sample User agent string found: Mozilla/4.0 (compatible; MSIE 8.0; Windows NT 6.1; fr) Opera 11.00
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/50.0.2661.102 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:12.0) Gecko/20100101 Firefox/12.0
Source: Initial sample User agent string found: Mozilla/5.0 (X11; U; Linux x86_64; de; rv:1.9.2.8) Gecko/20100723 Ubuntu/10.04 (lucid) Firefox/3.6.8
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 5.1; rv:13.0) Gecko/20100101 Firefox/13.0.1
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:11.0) Gecko/20100101 Firefox/11.0
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:13.0) Gecko/20100101 Firefox/13.0.1
Source: Initial sample User agent string found: Opera/9.80 (Windows NT 5.1; U; en) Presto/2.10.289 Version/12.01
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 5.1; rv:5.0.1) Gecko/20100101 Firefox/5.0.1
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; rv:5.0) Gecko/20100101 Firefox/5.02
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.0) AppleWebKit/535.1 (KHTML, like Gecko) Chrome/13.0.782.112 Safari/535.1
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.116 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/53.0.2785.143 Safari/537.36

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: rfixnaMj52.elf, type: SAMPLE
Source: Yara match File source: 6225.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 6227.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY
Yara detected Gafgyt
Source: Yara match File source: rfixnaMj52.elf, type: SAMPLE
Source: Yara match File source: 6225.1.00007f22f0400000.00007f22f0415000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 6227.1.00007f22f0400000.00007f22f0415000.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
31.214.243.29
 unknown Germany
197071 ACTIVE-SERVERSactive-serverscomDE false
109.202.202.202
 unknown Switzerland
13030 INIT7CH false
91.189.91.43
 unknown United Kingdom
41231 CANONICAL-ASGB false
91.189.91.42
 unknown United Kingdom
41231 CANONICAL-ASGB false