Coinminer.Win64.CRYPTONIGHT.AT

 Modified by: Kiyoshi Obuchi

 ALIASES:

Trojan:Win32/CoinMiner(MICROSOFT); Miner.XMRig!gen1(NORTON); Win32:CryptoMiner-L [Trj](AVAST)

 PLATFORM:

Windows

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

  • Threat Type: Coinminer

  • Destructiveness: No

  • Encrypted: No

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet


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 does not have any file infection routine.

It does not have any propagation routine.

It does not have any backdoor routine.

It does not have any information-stealing capability.

However, as of this writing, the said sites are inaccessible.

  TECHNICAL DETAILS

File Size:

776,704 bytes

File Type:

EXE

Memory Resident:

No

Initial Samples Received Date:

28 May 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.

Infection Points

This Coinminer does not have any file infection routine.

Propagation

This Coinminer does not have any propagation routine.

Backdoor Routine

This Coinminer does not have any backdoor routine.

Rootkit Capabilities

This Coinminer does not have rootkit capabilities.

Information Theft

This Coinminer does not have any information-stealing capability.

Other Details

This Coinminer does the following:

  • Connects to the following URL to download its configuration for cryptomining activities:
    • https://{BLOCKED}.{BLOCKED}.25.202

However, as of this writing, the said sites are inaccessible.

It 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 suppt)
    -r, --retries=N number of times to retry before switch to backup seer (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 ces 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 (defau 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 does not exploit any vulnerability.

  SOLUTION

Minimum Scan Engine:

9.850

FIRST VSAPI PATTERN FILE:

15.138.05

FIRST VSAPI PATTERN DATE:

28 May 2019

VSAPI OPR PATTERN File:

15.139.00

VSAPI OPR PATTERN Date:

29 May 2019

Step 1

Before doing any scans, Windows 7, Windows 8, Windows 8.1, and Windows 10 users must disable System Restore to allow full scanning of their computers.

Step 2

Scan your computer with your Trend Micro product to delete files detected as Coinminer.Win64.CRYPTONIGHT.AT. 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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