Linux Analysis Report
YLjhvMJyOO.elf

Overview

General Information

Sample name: YLjhvMJyOO.elf
renamed because original name is a hash value
Original sample name: 28b05f9283819c954ddaadd1105f7dab.elf
Analysis ID: 1427664
MD5: 28b05f9283819c954ddaadd1105f7dab
SHA1: f3ebcecb0ada3ff4ea311aae953e56fdac485683
SHA256: 14b09fb51305b056b24300482dcca479ac19f36d6a5a519ba994c0ec692822d3
Tags: 32armelfmirai
Infos:

Detection

Mirai
Score: 84
Range: 0 - 100
Whitelisted: false

Signatures

Antivirus / Scanner detection for submitted sample
Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Yara detected Mirai
Performs DNS queries to domains with low reputation
Queries the IP of a very long domain name
Sample deletes itself
Detected TCP or UDP traffic on non-standard ports
Sample has stripped symbol table
Uses the "uname" system call to query kernel version information (possible evasion)
Yara signature match

Classification

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: YLjhvMJyOO.elf Avira: detected
Multi AV Scanner detection for submitted file
Source: YLjhvMJyOO.elf ReversingLabs: Detection: 42%

Networking
barindex
Performs DNS queries to domains with low reputation
Source: DNS query: kovey.mezo-api.xyz
Queries the IP of a very long domain name
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66a1PV!E(j~5uG= fOOPV!a1EA;@@x
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= fvK66a1PV!E(%:5;= fMOOPV!a1EAP@@x
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66a1PV!E(j5`V= fOOPV!a1EAc@@x
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66a1PV!E(:#5I= fOOPV!a1EAe@@x
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= fk66a1PV!E(:,5 = fJJJPV!a1E<=@@h
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= fG/66a1PV!E(`mj5$= f1OOPV!a1EA@@t
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66a1PV!E(x:5;= fOOPV!a1EA@@t
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= ftc66a1PV!E(:5P= feOOPV!a1EA@@t
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= f66a1PV!E(je5!{= fNOOPV!a1EA*@@t
Source: unknown DNS traffic detected: query: kovey.mezo-api.xyz.= fR66a1PV!E(|:1I5OL= fJJPV!a1E<Z@@5L
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.15:39686 -> 45.131.111.219:33966
Source: unknown DNS traffic detected: queries for: kovey.mezo-api.xyz

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: YLjhvMJyOO.elf, type: SAMPLE Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: 5534.1.00007fad58017000.00007fad58026000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: YLjhvMJyOO.elf PID: 5534, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Sample has stripped symbol table
Source: ELF static info symbol of initial sample .symtab present: no
Yara signature match
Source: YLjhvMJyOO.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: 5534.1.00007fad58017000.00007fad58026000.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: YLjhvMJyOO.elf PID: 5534, 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: classification engine Classification label: mal84.troj.evad.linELF@0/1@11/0

Hooking and other Techniques for Hiding and Protection
barindex
Sample deletes itself
Source: /tmp/YLjhvMJyOO.elf (PID: 5536) File: /tmp/YLjhvMJyOO.elf Jump to behavior
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/YLjhvMJyOO.elf (PID: 5534) Queries kernel information via 'uname': Jump to behavior
Source: YLjhvMJyOO.elf, 5534.1.00007ffe35983000.00007ffe359a4000.rw-.sdmp Binary or memory string: /tmp/qemu-open.nrn8tC
Source: YLjhvMJyOO.elf, 5534.1.00007ffe35983000.00007ffe359a4000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/YLjhvMJyOO.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/YLjhvMJyOO.elf
Source: YLjhvMJyOO.elf, 5534.1.000055bd24f72000.000055bd250a0000.rw-.sdmp Binary or memory string: U!/etc/qemu-binfmt/arm
Source: YLjhvMJyOO.elf, 5534.1.00007ffe35983000.00007ffe359a4000.rw-.sdmp Binary or memory string: U/tmp/qemu-open.nrn8tC:
Source: YLjhvMJyOO.elf, 5534.1.000055bd24f72000.000055bd250a0000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: YLjhvMJyOO.elf, 5534.1.00007ffe35983000.00007ffe359a4000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm

Stealing of Sensitive Information
barindex
Yara detected Mirai
Source: Yara match File source: YLjhvMJyOO.elf, type: SAMPLE
Source: Yara match File source: 5534.1.00007fad58017000.00007fad58026000.r-x.sdmp, type: MEMORY

Remote Access Functionality
barindex
Yara detected Mirai
Source: Yara match File source: YLjhvMJyOO.elf, type: SAMPLE
Source: Yara match File source: 5534.1.00007fad58017000.00007fad58026000.r-x.sdmp, type: MEMORY
windows-stand
  • 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
45.131.111.219
 kovey.mezo-api.xyz Germany
398373 SERVERDESTROYERSUS true

Contacted Domains

Name IP Active
kovey.mezo-api.xyz 45.131.111.219 true
kovey.mezo-api.xyz.= fvK66a1PV!E(%:5;= fMOOPV!a1EAP@@x unknown unknown
kovey.mezo-api.xyz.= f66a1PV!E(j5`V= fOOPV!a1EAc@@x unknown unknown
kovey.mezo-api.xyz.= ftc66a1PV!E(:5P= feOOPV!a1EA@@t unknown unknown
kovey.mezo-api.xyz.= fk66a1PV!E(:,5 = fJJJPV!a1E<=@@h unknown unknown
kovey.mezo-api.xyz.= f66a1PV!E(:#5I= fOOPV!a1EAe@@x unknown unknown
kovey.mezo-api.xyz.= fR66a1PV!E(|:1I5OL= fJJPV!a1E<Z@@5L unknown unknown
kovey.mezo-api.xyz.= fG/66a1PV!E(`mj5$= f1OOPV!a1EA@@t unknown unknown
kovey.mezo-api.xyz.= f66a1PV!E(je5!{= fNOOPV!a1EA*@@t unknown unknown
kovey.mezo-api.xyz.= f66a1PV!E(j~5uG= fOOPV!a1EA;@@x unknown unknown
kovey.mezo-api.xyz.= f66a1PV!E(x:5;= fOOPV!a1EA@@t unknown unknown