Linux Analysis Report
co.elf

Overview

General Information

Sample name: co.elf
Analysis ID: 1538179
MD5: 947ea7d39dcdd027dabe76be466b3bc7
SHA1: f172922e091cbf414b331f29822555aab4b618c6
SHA256: fc713863c1d2e19127c6135c4ee49aadf3130c3f9bc0c935d056ef7f3926635b
Tags: elfuser-abuse_ch
Infos:

Detection

Gafgyt, Mirai
Score: 88
Range: 0 - 100
Whitelisted: false

Signatures

Antivirus / Scanner detection for submitted sample
Found malware configuration
Multi AV Scanner detection for submitted file
Suricata IDS alerts for network traffic
Yara detected Gafgyt
Yara detected Mirai
Detected TCP or UDP traffic on non-standard ports
Sample contains strings that are user agent strings indicative of HTTP manipulation
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Uses the "uname" system call to query kernel version information (possible evasion)

Classification

Name Description Attribution Blogpost URLs Link
Bashlite, Gafgyt Bashlite is a malware family which infects Linux systems in order to launch distributed denial-of-service attacks (DDoS). Originally it was also known under the name Bashdoor, but this term now refers to the exploit method used by the malware. It has been used to launch attacks of up to 400 Gbps. No Attribution https://malpedia.caad.fkie.fraunhofer.de/details/elf.bashlite
Name Description Attribution Blogpost URLs Link
Mirai Mirai is one of the first significant botnets targeting exposed networking devices running Linux. Found in August 2016 by MalwareMustDie, its name means "future" in Japanese. Nowadays it targets a wide range of networked embedded devices such as IP cameras, home routers (many vendors involved), and other IoT devices. Since the source code was published on "Hack Forums" many variants of the Mirai family appeared, infecting mostly home networks all around the world. No Attribution https://malpedia.caad.fkie.fraunhofer.de/details/elf.mirai

AV Detection
barindex
Antivirus / Scanner detection for submitted sample
Source: co.elf Avira: detected
Found malware configuration
Source: co.elf Malware Configuration Extractor: Gafgyt {"C2 url": "212.224.93.228:666"}
Multi AV Scanner detection for submitted file
Source: co.elf ReversingLabs: Detection: 71%

Networking
barindex
Suricata IDS alerts for network traffic
Source: Network traffic Suricata IDS: 2847206 - Severity 1 - ETPRO MALWARE ELF/BASHLITE Variant CnC Checkin : 192.168.2.13:37032 -> 212.224.93.228:666
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.13:37032 -> 212.224.93.228:666
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.13:48202 -> 185.125.190.26:443
Source: unknown TCP traffic detected without corresponding DNS query: 212.224.93.228
Source: unknown TCP traffic detected without corresponding DNS query: 212.224.93.228
Source: unknown TCP traffic detected without corresponding DNS query: 212.224.93.228
Source: unknown TCP traffic detected without corresponding DNS query: 212.224.93.228
Source: unknown TCP traffic detected without corresponding DNS query: 212.224.93.228
Source: unknown TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: unknown TCP traffic detected without corresponding DNS query: 185.125.190.26
Source: global traffic DNS traffic detected: DNS query: daisy.ubuntu.com
Source: unknown Network traffic detected: HTTP traffic on port 48202 -> 443
Source: classification engine Classification label: mal88.troj.linELF@0/0@2/0
Source: co.elf ELF static info symbol of initial sample: /home/firmware/build/temp-armv5l/gcc-core/gcc/config/arm/lib1funcs.asm
Source: co.elf ELF static info symbol of initial sample: /home/firmware/build/temp-armv5l/gcc-core/gcc/config/arm/lib1funcs.asm
Source: co.elf ELF static info symbol of initial sample: /home/firmware/build/temp-armv5l/gcc-core/gcc/config/arm/lib1funcs.asm
Source: co.elf ELF static info symbol of initial sample: /home/firmware/build/temp-armv5l/gcc-core/gcc/config/arm/lib1funcs.asm
Source: co.elf ELF static info symbol of initial sample: /home/firmware/build/temp-armv5l/gcc-core/gcc/config/arm/lib1funcs.asm
Source: co.elf ELF static info symbol of initial sample: libc/string/arm/_memcpy.S
Source: co.elf ELF static info symbol of initial sample: libc/string/arm/bcopy.S
Source: co.elf ELF static info symbol of initial sample: libc/string/arm/memcpy.S
Source: co.elf ELF static info symbol of initial sample: libc/string/arm/memmove.S
Source: co.elf ELF static info symbol of initial sample: libc/string/arm/memset.S
Source: co.elf ELF static info symbol of initial sample: libc/string/arm/strcmp.S
Source: co.elf ELF static info symbol of initial sample: libc/string/arm/strlen.S
Source: co.elf ELF static info symbol of initial sample: libc/sysdeps/linux/arm/crt1.S
Source: co.elf ELF static info symbol of initial sample: libc/sysdeps/linux/arm/crti.S
Source: co.elf ELF static info symbol of initial sample: libc/sysdeps/linux/arm/crtn.S
Source: co.elf ELF static info symbol of initial sample: libc/sysdeps/linux/arm/sigrestorer.S
Source: co.elf ELF static info symbol of initial sample: libc/sysdeps/linux/arm/vfork.S
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/co.elf (PID: 5433) Queries kernel information via 'uname': Jump to behavior
Source: co.elf, 5433.1.000055fb7e5fd000.000055fb7e72b000.rw-.sdmp, co.elf, 5435.1.000055fb7e5fd000.000055fb7e72b000.rw-.sdmp, co.elf, 5437.1.000055fb7e5fd000.000055fb7e72b000.rw-.sdmp, co.elf, 5448.1.000055fb7e5fd000.000055fb7e72b000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: co.elf, 5433.1.000055fb7e5fd000.000055fb7e72b000.rw-.sdmp, co.elf, 5435.1.000055fb7e5fd000.000055fb7e72b000.rw-.sdmp, co.elf, 5437.1.000055fb7e5fd000.000055fb7e72b000.rw-.sdmp, co.elf, 5448.1.000055fb7e5fd000.000055fb7e72b000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: co.elf, 5433.1.00007fff09eb4000.00007fff09ed5000.rw-.sdmp, co.elf, 5435.1.00007fff09eb4000.00007fff09ed5000.rw-.sdmp, co.elf, 5437.1.00007fff09eb4000.00007fff09ed5000.rw-.sdmp, co.elf, 5448.1.00007fff09eb4000.00007fff09ed5000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: co.elf, 5433.1.00007fff09eb4000.00007fff09ed5000.rw-.sdmp, co.elf, 5435.1.00007fff09eb4000.00007fff09ed5000.rw-.sdmp, co.elf, 5437.1.00007fff09eb4000.00007fff09ed5000.rw-.sdmp, co.elf, 5448.1.00007fff09eb4000.00007fff09ed5000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/co.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/co.elf

Stealing of Sensitive Information
barindex
Yara detected Gafgyt
Source: Yara match File source: co.elf, type: SAMPLE
Yara detected Mirai
Source: Yara match File source: co.elf, type: SAMPLE
Source: Yara match File source: 5433.1.00007f78cc017000.00007f78cc02c000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5435.1.00007f78cc017000.00007f78cc02c000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5448.1.00007f78cc017000.00007f78cc02c000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5437.1.00007f78cc017000.00007f78cc02c000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: co.elf PID: 5433, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: co.elf PID: 5435, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: co.elf PID: 5448, type: MEMORYSTR
Sample contains strings that are user agent strings indicative of HTTP manipulation
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/59.0.3071.86 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/61.0.3163.100 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_13) AppleWebKit/604.1.38 (KHTML, like Gecko) Version/11.0 Safari/604.1.38
Source: Initial sample User agent string found: Mozilla/5.0 (iPhone; CPU iPhone OS 7_0 like Mac OS X) AppleWebKit/537.51.1 (KHTML, like Gecko) Version/7.0 Mobile/11A465 Safari/9537.53
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64; rv:52.0) Gecko/20100101 Firefox/52.0
Source: Initial sample User agent string found: Mozilla/5.0 (X11; CrOS x86_64 9592.96.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.114 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/60.0.3112.113 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows Phone 10.0; Android 6.0.1; Microsoft; Lumia 535) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/51.0.2704.79 Mobile Safari/537.36 Edge/14.14393
Source: Initial sample User agent string found: Mozilla/5.0 (Linux; Android 4.4.4; HTC Desire 620 Build/KTU84P) AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Chrome/33.0.0.0 Mobile Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (iPhone; CPU iPhone OS 10_2_1 like Mac OS X) AppleWebKit/602.4.6 (KHTML, like Gecko) Mobile/14D27
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.3; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/60.0.3112.113 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/56.0.2924.87 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/61.0.3163.100 Safari/537.36
Source: Initial sample User agent string found: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en; rv:1.8.1.11) Gecko/20071128 Camino/1.5.4
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: Mozilla/5.0 (Windows; U; Windows NT 6.1; cs; rv:1.9.2.6) Gecko/20100628 myibrow/4alpha2
Source: Initial sample User agent string found: Mozilla/5.0 (Windows; U; Win 9x 4.90; SG; rv:1.9.2.4) Gecko/20101104 Netscape/9.1.0285
Source: Initial sample User agent string found: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Thunderbird/38.2.0 Lightning/4.0.2
Source: Initial sample User agent string found: Mozilla/5.0 (Windows NT 6.1; WOW64) SkypeUriPreview Preview/0.5

Remote Access Functionality
barindex
Yara detected Gafgyt
Source: Yara match File source: co.elf, type: SAMPLE
Yara detected Mirai
Source: Yara match File source: co.elf, type: SAMPLE
Source: Yara match File source: 5433.1.00007f78cc017000.00007f78cc02c000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5435.1.00007f78cc017000.00007f78cc02c000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5448.1.00007f78cc017000.00007f78cc02c000.r-x.sdmp, type: MEMORY
Source: Yara match File source: 5437.1.00007f78cc017000.00007f78cc02c000.r-x.sdmp, type: MEMORY
Source: Yara match File source: Process Memory Space: co.elf PID: 5433, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: co.elf PID: 5435, type: MEMORYSTR
Source: Yara match File source: Process Memory Space: co.elf PID: 5448, type: MEMORYSTR

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
212.224.93.228
 unknown Germany
44066 DE-FIRSTCOLOwwwfirst-colonetDE true
185.125.190.26
 unknown United Kingdom
41231 CANONICAL-ASGB false

Contacted Domains

Name IP Active
daisy.ubuntu.com 162.213.35.24 true

Contacted URLs

Name Malicious Antivirus Detection Reputation
212.224.93.228:666 true
    		unknown