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Coinminer.SH.MALXMR.UWEJK

August 05, 2019
 Analysis by: Arianne Grace Dela Cruz
 ALIASES:

HEUR:Trojan-Downloader.Shell.Miner.a (KASPERSKY); Trojan.Linux.Coinminer (IKARUS)

 PLATFORM:

Linux

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

  • Threat Type: Coinminer

  • Destructiveness: No

  • Encrypted:

  • In the wild: Yes

  OVERVIEW


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

  TECHNICAL DETAILS

File Size:

5,427 bytes

File Type:

Other

Initial Samples Received Date:

22 Jul 2019

Arrival Details

This Coinminer 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 Coinminer drops the following files:

  • /tmp/config.json
  • /tmp/bashf
  • /dev/null
  • /tmp/pools.txt
  • /tmp/bashg
  • /dev/null
  • config.txt
  • cpu.txt
  • /tmp/lst
  • /tmp/dlcfg
  • /tmp/fake.cfg
  • /tmp/XbashH
  • /dev/null
  • /tmp/_MEI8Nb1Xm/Crypto.Cipher._DES.so
  • /tmp/_MEI8Nb1Xm/_cffi_backend.so
  • /tmp/_MEI8Nb1Xm/_codecs_cn.so
  • /tmp/_MEI8Nb1Xm/_codecs_hk.so
  • /tmp/_MEI8Nb1Xm/_codecs_iso2022.so
  • /tmp/_MEI8Nb1Xm/_codecs_jp.so
  • /tmp/_MEI8Nb1Xm/_codecs_kr.so
  • /tmp/_MEI8Nb1Xm/_codecs_tw.so
  • /tmp/_MEI8Nb1Xm/_ctypes.so
  • /tmp/_MEI8Nb1Xm/_hashlib.so
  • /tmp/_MEI8Nb1Xm/_json.so
  • /tmp/_MEI8Nb1Xm/_multibytecodec.so
  • /tmp/_MEI8Nb1Xm/_ssl.so
  • /tmp/_MEI8Nb1Xm/bz2.so
  • /tmp/_MEI8Nb1Xm/cryptography.hazmat.bindings._constant_time.so
  • /tmp/_MEI8Nb1Xm/cryptography.hazmat.bindings._openssl.so
  • /tmp/_MEI8Nb1Xm/libbz2.so.1.0
  • /tmp/_MEI8Nb1Xm/libcrypto.so.1.1
  • /tmp/_MEI8Nb1Xm/libexpat.so.1
  • /tmp/_MEI8Nb1Xm/libffi.so.6
  • /tmp/_MEI8Nb1Xm/libpython2.7.so.1.0
  • /tmp/_MEI8Nb1Xm/libreadline.so.7
  • /tmp/_MEI8Nb1Xm/libssl.so.1.1
  • /tmp/_MEI8Nb1Xm/libtinfo.so.5
  • /tmp/_MEI8Nb1Xm/libz.so.1
  • /tmp/_MEI8Nb1Xm/pyexpat.so
  • /tmp/_MEI8Nb1Xm/readline.so
  • /tmp/_MEI8Nb1Xm/resource.so
  • /tmp/_MEI8Nb1Xm/termios.so
  • /tmp/_MEI8Nb1Xm/certifi/cacert.pem
  • /tmp/_MEI8Nb1Xm/cryptography-2.1.4-py2.7.egg-info/PKG-INFO
  • /tmp/_MEI8Nb1Xm/cryptography-2.1.4-py2.7.egg-info/dependency_links.txt
  • /tmp/_MEI8Nb1Xm/cryptography-2.1.4-py2.7.egg-info/not-zip-safe
  • /tmp/_MEI8Nb1Xm/cryptography-2.1.4-py2.7.egg-info/requires.txt
  • /tmp/_MEI8Nb1Xm/cryptography-2.1.4-py2.7.egg-info/top_level.txt
  • /tmp/_MEI8Nb1Xm/include/python2.7/pyconfig.h
  • /tmp/_MEI8Nb1Xm/lib/python2.7/config-x86_64-linux-gnu/Makefile
  • /tmp/_MEI8Nb1Xm/requests/cacert.pem
  • /dev/null
  • /tmp/JpSHn6
  • /tmp/tmpwefNo4
  • /dev/null
  • /tmp/ccwwXXIH.res
  • /tmp/cc1TzruS.c
  • /tmp/ccWiVmP2.o
  • /tmp/cc1KJjad.ld
  • /tmp/ccavbivn.le
  • /tmp/cc1KJjad.ld
  • /tmp/ccavbivn.le
  • /tmp/tmpwefNo4

It creates the following folders:

  • /tmp/_MEI8Nb1Xm/

Other Details

This Coinminer connects to the following possibly malicious URL:

  • {BLOCKED}.{BLOCKED}.177.144
  • {BLOCKED}.{BLOCKED}.46.39
  • {BLOCKED}.{BLOCKED}.201.153

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.250.02

FIRST VSAPI PATTERN DATE:

22 Jul 2019

VSAPI OPR PATTERN File:

15.251.00

VSAPI OPR PATTERN Date:

23 Jul 2019

Scan your computer with your Trend Micro product to delete files detected as Coinminer.SH.MALXMR.UWEJK. 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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