Linux Analysis Report
xd.arm5.elf

Overview

General Information

Sample name: xd.arm5.elf
Analysis ID: 1669052
MD5: ec75af6b9f768a58685cdafff206a001
SHA1: 42ff8d0f77955cae73338c39222324980dfb8fbe
SHA256: abb4b994224dd1aa93ac7a7079b9d0eb6c54d431b6c91df70551035244b7cf14
Tags: elfuser-abuse_ch
Infos:

Detection

Score: 60
Range: 0 - 100

Signatures

Malicious sample detected (through community Yara rule)
Multi AV Scanner detection for submitted file
Sample is packed with UPX
Detected TCP or UDP traffic on non-standard ports
ELF contains segments with high entropy indicating compressed/encrypted content
Sample contains only a LOAD segment without any section mappings
Sample listens on a socket
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)
Yara signature match

Classification

RansomwareSpreadingPhishingBankerTrojan / BotAdwareSpywareExploiterEvaderMinercleansuspiciousmalicious

AV Detection
barindex
Multi AV Scanner detection for submitted file
Source: xd.arm5.elf ReversingLabs: Detection: 36%
Detected TCP or UDP traffic on non-standard ports
Source: global traffic TCP traffic: 192.168.2.23:60828 -> 209.141.33.93:5538
Sample listens on a socket
Source: /tmp/xd.arm5.elf (PID: 6219) Socket: 192.168.2.23:9473 Jump to behavior
Tries to connect to HTTP servers, but all servers are down (expired dropper behavior)
Source: global traffic TCP traffic: 192.168.2.23:43928 -> 91.189.91.42:443
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: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
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: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
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: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 91.189.91.42
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: unknown TCP traffic detected without corresponding DNS query: 209.141.33.93
Source: xd.arm5.elf String found in binary or memory: http://upx.sf.net
Source: unknown Network traffic detected: HTTP traffic on port 43928 -> 443
Source: unknown Network traffic detected: HTTP traffic on port 42836 -> 443

System Summary
barindex
Malicious sample detected (through community Yara rule)
Source: 6219.1.00007f14b8017000.00007f14b8023000.r-x.sdmp, type: MEMORY Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Source: Process Memory Space: xd.arm5.elf PID: 6219, type: MEMORYSTR Matched rule: Linux_Trojan_Gafgyt_28a2fe0c Author: unknown
Sample contains only a LOAD segment without any section mappings
Source: LOAD without section mappings Program segment: 0x8000
Yara signature match
Source: 6219.1.00007f14b8017000.00007f14b8023000.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: xd.arm5.elf PID: 6219, 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: mal60.evad.linELF@0/0@0/0

Data Obfuscation
barindex
Sample is packed with UPX
Source: initial sample String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample String containing UPX found: $Info: This file is packed with the UPX executable packer http://upx.sf.net $
Source: initial sample String containing UPX found: $Id: UPX 3.94 Copyright (C) 1996-2017 the UPX Team. All Rights Reserved. $
ELF contains segments with high entropy indicating compressed/encrypted content
Source: xd.arm5.elf Submission file: segment LOAD with 7.9163 entropy (max. 8.0)
Uses the "uname" system call to query kernel version information (possible evasion)
Source: /tmp/xd.arm5.elf (PID: 6219) Queries kernel information via 'uname': Jump to behavior
Source: xd.arm5.elf, 6219.1.0000563d190b6000.0000563d192a4000.rw-.sdmp Binary or memory string: =V!/etc/qemu-binfmt/arm
Source: xd.arm5.elf, 6219.1.0000563d190b6000.0000563d192a4000.rw-.sdmp Binary or memory string: /etc/qemu-binfmt/arm
Source: xd.arm5.elf, 6219.1.00007ffcde94a000.00007ffcde96b000.rw-.sdmp Binary or memory string: /usr/bin/qemu-arm
Source: xd.arm5.elf, 6219.1.00007ffcde94a000.00007ffcde96b000.rw-.sdmp Binary or memory string: x86_64/usr/bin/qemu-arm/tmp/xd.arm5.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/xd.arm5.elf

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
209.141.33.93
 unknown United States
53667 PONYNETUS 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