Worm.Linux.DARLLOZ.AA

 Analysis by: Jemimah Mae Molina

 ALIASES:

ELF:Darlloz-D [Trj] (AVAST); Net-Worm.Linux.Darlloz.a (KASPERSKY)

 PLATFORM:

Linux

 OVERALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE:

  • Threat Type: Worm

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW


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

It takes advantage of software vulnerabilities to propagate across networks.

  TECHNICAL DETAILS

File Size:

75,164 bytes

File Type:

ELF

Memory Resident:

No

Initial Samples Received Date:

23 Oct 2019

Payload:

Deletes files, Terminates processes

Arrival Details

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

Installation

This Worm creates the following folders:

  • /var/run/.zollard

Other System Modifications

This Worm deletes the following files:

  • /var/run/.lightscan
  • /var/run/lightscan
  • /var/run/.lihtscan
  • /var/run/mipsel
  • /var/run/mips
  • /var/run/sh
  • /var/run/arm
  • /var/run/ppc
  • /var/run/m
  • /var/run/mi
  • /var/run/s
  • /var/run/a
  • /var/run/p
  • /var/run/msx
  • /var/run/mx
  • /var/run/sx
  • /var/run/ax
  • /var/run/px
  • /var/run/32
  • /var/run/sel
  • /var/run/pid
  • /var/run/gcc
  • /var/run/dev
  • /var/run/psx
  • /var/run/mpl
  • /var/run/mps
  • /var/run/sph
  • /var/run/arml
  • /var/run/mips.l
  • /var/run/mipsell
  • /var/run/ppcl
  • /var/run/shl
  • /bin/pp
  • /bin/mi
  • /bin/mii
  • /var/run/arm
  • /var/run/mips
  • /var/run/mipsel
  • /var/run/ppc
  • /var/run/sh
  • /var/run/.lamorte/.log
  • /var/run/.lamorte/.out
  • /var/run/.lamorte/lamortee
  • /var/run/ash
  • /var/run/mish
  • /var/run/msh
  • /var/run/psh
  • /var/run/sshd
  • /var/run/telnetd
  • /var/run/.output
  • /var/run/.results
  • /var/run/.logd_a
  • /var/run/.logd_m
  • /var/run/.logd_ms
  • /var/run/.logd_p
  • /var/run/.logd_s
  • /var/tmp/dreams.install.sh
  • /var/tmp/ep2.ppc
  • /var/run/.cmd.run
  • /dev/shm/cmd.so
  • /dev/shm/que
  • /dev/cmd.so
  • /dev/que
  • /var/cmd.so
  • /media/cmd.so
  • /media/http.so
  • /tmp/hi
  • /tmp/http.so
  • /tmp/que
  • /usr/bin/-wget

It deletes the following folders:

  • /var/run/.lamorte

Propagation

This Worm takes advantage of the following software vulnerabilities to propagate across networks:

Process Termination

This Worm terminates the following services if found on the affected system:

  • inetd
  • inetd.busybox
  • telnetd
  • xinetd

It terminates the following processes if found running in the affected system's memory:

  • inetd
  • xinetd
  • telnetd
  • utelnetd
  • scfgmgr

Other Details

This Worm does the following:

  • It terminates and deletes the following processes and files:
    • /var/run/.lightpid
    • /var/run/.aidrapid
    • /var/run/lightpid
    • /var/run/.lihtpid
    • /var/run/.lamorte/lamorte.pid
    • /var/run/.daemon.pid
  • It drops TCP packets on the following ports:
    • 23
    • 32764
  • It loads the following modules:
    • /lib/modules/{kernel version}/kernel/net/ipv4/netfilter/ip_tables.ko
    • /lib/modules/{kernel version}/kernel/net/ipv4/netfilter/iptable_filter.ko
  • It deletes the following files if /bin/busybox exists:
    • /bin/wget
    • /sbin/wget
    • /usr/bin/wget
    • /ffp/bin/wget
  • It listens on port 58455.
  • It uses the following credentials to try to login to other devices:
    • root
    • dreambox
    • vizxv
    • sysadmin
    • superuser
    • 1234
    • 12345
    • 1111
    • smcadmin
    • mysql
    • 123456

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.448.02

FIRST VSAPI PATTERN DATE:

23 Oct 2019

VSAPI OPR PATTERN File:

15.449.00

VSAPI OPR PATTERN Date:

24 Oct 2019

Scan your computer with your Trend Micro product to delete files detected as Worm.Linux.DARLLOZ.AA. If the detected files have already been cleaned, deleted, or quarantined by your Trend Micro product, no further step is required. You may opt to simply delete the quarantined files. Please check the following Trend Micro Support pages for more information:


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