Analyse von: Patrick Angelo Roderno   
 

Linux.Chikdos.B!gen2 (NORTON); Backdoor:Linux/Setag!rfn (MICROSOFT); HEUR:Backdoor.Linux.Ganiw.d (KASPERSKY)

 Plattform:

Linux

 Risikobewertung (gesamt):
 Schadenspotenzial::
 Verteilungspotenzial::
 reportedInfection:
 Trend Micro Lösungen:
Niedrig
Mittel
Hoch
Kritisch

  • Malware-Typ:
    Backdoor

  • Zerstrerisch?:
    Nein

  • Verschlsselt?:
    Nein

  • In the wild::
    Ja

  Überblick

Infektionsweg: Aus dem Internet heruntergeladen, Fallen gelassen von anderer Malware

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Führt Befehle eines externen, böswilligen Benutzers aus, wodurch das betroffene System gefährdet wird.

Verbindet sich mit einer bestimmten Website, um Daten zu versenden und zu empfangen.

  Technische Details

Dateigröße: 1,223,123 bytes
Dateityp: ELF
Speicherresiden: Nein
Erste Muster erhalten am: 01 November 2018
Schadteil: Drops files, Connects to URLs/IPs, Steals information

Übertragungsdetails

It arrives on a system as a file dropped by other malware or as a file downloaded unknowingly by users when visiting malicious sites.

Installation

Schleust die folgenden Eigenkopien in das betroffene System ein und führt sie aus:

  • /usr/bin/bsd-port/getty

Erstellt die folgenden Ordner:

  • /usr/bin/dpkgd
  • /usr/bin/bsd-port

Backdoor-Routine

Führt die folgenden Befehle eines externen, böswilligen Benutzers aus:

  • Initiate DDoS attacks:
    • SYN flood
    • DNS flood
    • ICMP flood
    • UDP flood
    • TCP flood
    • TNS poisoning
    • Challenge Collapsar (CC) attack
  • Stop DDoS attack
  • Execute shell commands

Einschleusungsroutine

Schleust die folgenden Dateien ein:

  • /usr/bin/bsd-port/getty.lock
  • /tmp/gates.lod
  • /tmp/moni.lod
  • /tmp/notify.file

Datendiebstahl

Folgende Daten werden gesammelt:

  • OS name
  • OS version
  • CPU clock rate
  • CPU usage
  • Number of CPU cores
  • Network usage
  • RAM size
  • IP address of infected machine

Andere Details

Verbindet sich mit der folgenden Website, um Daten zu versenden und zu empfangen:

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  • {BLOCKED}.{BLOCKED}.195.68
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  • {BLOCKED}.{BLOCKED}.17.107
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  • {BLOCKED}.{BLOCKED}.28.234
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  • {BLOCKED}.{BLOCKED}.6.3
  • {BLOCKED}.{BLOCKED}.136.10
  • {BLOCKED}.{BLOCKED}.140.10
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  • {BLOCKED}.{BLOCKED}.148.39
  • {BLOCKED}.{BLOCKED}.26.42
  • {BLOCKED}.{BLOCKED}.32.100
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  • {BLOCKED}.{BLOCKED}.33.60
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  • {BLOCKED}.{BLOCKED}.3.73
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  • {BLOCKED}.{BLOCKED}.211.22
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  • {BLOCKED}.{BLOCKED}.61.255
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  • {BLOCKED}.{BLOCKED}.176.22
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  • {BLOCKED}.{BLOCKED}.192.33
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  • {BLOCKED}.{BLOCKED}.0.242
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  • {BLOCKED}.{BLOCKED}.152.130
  • {BLOCKED}.{BLOCKED}.150.123
  • {BLOCKED}.{BLOCKED}.128.33
  • {BLOCKED}.{BLOCKED}.72.7
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  • {BLOCKED}.{BLOCKED}.29.150
  • {BLOCKED}.{BLOCKED}.29.170
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  • {BLOCKED}.{BLOCKED}.200.68
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  • {BLOCKED}.{BLOCKED}.150.139
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  • {BLOCKED}.{BLOCKED}.160.33
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  • {BLOCKED}.{BLOCKED}.144.161
  • {BLOCKED}.{BLOCKED}.5.240
  • {BLOCKED}.{BLOCKED}.25.129
  • {BLOCKED}.{BLOCKED}.103.36
  • {BLOCKED}.{BLOCKED}.1.227
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  • {BLOCKED}.{BLOCKED}.120.5
  • {BLOCKED}.{BLOCKED}.96.68
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  • {BLOCKED}.{BLOCKED}.248.245
  • {BLOCKED}.{BLOCKED}.254.34
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  • {BLOCKED}.{BLOCKED}.104.15
  • {BLOCKED}.{BLOCKED}.104.26
  • {BLOCKED}.{BLOCKED}.33.227
  • {BLOCKED}.{BLOCKED}.107.27
  • {BLOCKED}.{BLOCKED}.128.68
  • {BLOCKED}.{BLOCKED}.192.68
  • {BLOCKED}.{BLOCKED}.17.2
  • {BLOCKED}.{BLOCKED}.203.86
  • {BLOCKED}.{BLOCKED}.203.90
  • {BLOCKED}.{BLOCKED}.203.98
  • {BLOCKED}.{BLOCKED}.92.86
  • {BLOCKED}.{BLOCKED}.92.98

Es macht Folgendes:

  • capable of updating itself to its latest version
  • replaces the following files with the copy of the malware and stores the original files in /usr/bin/dpkg/:
    • /bin/netstat
    • /bin/lsof
    • /bin/ps
    • /bin/ss
    • /usr/bin/netstat
    • /usr/bin/lsof
    • /usr/bin/ps
    • /usr/bin/ss
    • /usr/sbin/netstat
    • /usr/sbin/lsof
    • /usr/sbin/ps
    • /usr/sbin/ss
  • It adds the following scripts in /etc/rc{1-5}.d/ and /etc/init.d/ to automatically execute itself when the system starts up:
    • /etc/rc{1-5}.d/S97DbSecuritySpt
    • /etc/rc{1-5}.d/S99selinux
    • /etc/init.d/selinux
    • /etc/init.d/DbSecuritySpt

  Lösungen

Mindestversion der Scan Engine: 9.850
Erste VSAPI Pattern-Datei: 14.568.04
Erste VSAPI Pattern veröffentlicht am: 16 Oktober 2018
VSAPI OPR Pattern-Version: 15.237.00
VSAPI OPR Pattern veröffentlicht am: 16 Juli 2019

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