Author: Jay Bradley Nebre   

 

HEUR:RiskTool.Linux.BitCoinMiner.n(Kaspersky)

 PLATFORM:

Linux

 OVER ALL RISK RATING:
 DAMAGE POTENTIAL:
 DISTRIBUTION POTENTIAL:
 REPORTED INFECTION:
 INFORMATION EXPOSURE
Low
Medium
High
Critical

  • Threat Type:
    Coinminer

  • Destructiveness:
    No

  • Encrypted:
     

  • In the wild:
    Yes

  OVERVIEW

INFECTION CHANNEL: Downloaded from the Internet

This new version of KERBERDS, a known crypto-mining malware that uses an ld.so.preload-based rootkit for stealth, was seen propagating by telnet bruteforce attacks.

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.

It uses the system's central processing unit (CPU) and/or graphical processing unit (GPU) resources to mine cryptocurrency.

  TECHNICAL DETAILS

File size: 912,264 bytes
File type: ELF
Memory resident: Yes
INITIAL SAMPLES RECEIVED DATE: 24 October 2019
PAYLOAD: Connects to URLs/IPs

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.

Other Details

This Coinminer does the following:

  • It uses the following details on its coin mining routine:
    • algorithm: rx/0
    • url: {BLOCKED}6vifaxsi9vovnc9jjay2l.com:80 / {BLOCKED}.{BLOCKED}.120.73:80
    • user:48tKyhLzJvmfpaZjeEh2rmWSxbFqg7jNzPvQbLgueAc6avfKVrJFnyAMBuTn9ZeG4A3Gfww512YNZB9Tvaf52aVbPHpJFXT
    • pass: x
  • Accepts the following parameters:
    • -a, --algo=ALGO ? cryptonight (default) or cryptonight-lite
    • -o, --url=URL ? URL of mining server
    • -O, --userpass=U:P ? username:password pair for mining server
    • -u, --user=USERNAME ? username for mining server
    • -p, --pass=PASSWORD ? password for mining server
    • -t, --threads=N ? number of miner threads
    • -v, --av=N ? algorithm variation, 0 auto select
    • -k, --keepalive ? send keepalived for prevent timeout (need pool support)
    • -r, --retries=N ? number of times to retry before switch to backup server (default: 5)
    • -R, --retry-pause=N ? time to pause between retries (default: 5)
    • --cpu-affinity ? set process affinity to CPU core(s), mask 0x3 for cores 0 and 1
    • --cpu-priority ? set process priority (0 idle, 2 normal to 5 highest)
    • --no-huge-pages ? disable huge pages support
    • --no-color ? disable colored output
    • --variant ? algorithm PoW variant
    • --donate-level=N ? donate level, default 5%% (5 minutes in 100 minutes)
    • --user-agent ? set custom user-agent string for pool
    • -B, --background ? run the miner in the background
    • -c, --config=FILE ? load a JSON-format configuration file
    • -l, --log-file=FILE ? log all output to a file
    • --max-cpu-usage=N ? maximum CPU usage for automatic threads mode (default 75)
    • --safe ? safe adjust threads and av settings for current CPU
    • --nicehash ? enable nicehash/xmrig-proxy support
    • --print-time=N ? print hashrate report every N seconds
    • --api-port=N ? port for the miner API
    • --api-access-token=T ? access token for API
    • --api-worker-id=ID ? custom worker-id for API
    • -h, --help ? display this help and exit
    • -V, --version ? output version information and exit

It uses the system's central processing unit (CPU) and/or graphical processing unit (GPU) resources to mine cryptocurrency. This behavior makes the system run abnormally slow.

  SOLUTION

Minimum scan engine: 9.850
First VSAPI Pattern File: 15.450.07
First VSAPI Pattern Release Date: 24 October 2019
VSAPI OPR PATTERN-VERSION: 15.451.00
VSAPI OPR PATTERN DATE: 25 October 2019

Scan your computer with your Trend Micro product to delete files detected as Coinminer.Linux.KERBERDS.A. 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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