Coinminer.PS1.MALXMR.MOX

 Analysis by: John Rey Canon

 PLATFORM:

Windows

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

  • Threat Type: Coinminer

  • Destructiveness: No

  • Encrypted: Yes

  • In the wild: Yes

  OVERVIEW

Infection Channel:

Downloaded from the Internet, Dropped by other malware


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:

3,639,376 bytes

File Type:

PS1

Memory Resident:

No

Initial Samples Received Date:

04 Apr 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 connects to the following URL:
    • {BLOCKED}1.{BLOCKED}y.com:443
    • {BLOCKED}1.{BLOCKED}h.com:443
    • {BLOCKED}1.{BLOCKED}g.com:443
  • It accepts the following parameters:
    • -a, --algo=ALGO — specify the algorithm to use (cryptonight, cryptonight-lite, cryptonight-heavy)
    • -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
    • --rig-id=ID — rig identifier for pool-side statistics (needs pool support)
    • -t, --threads=N — number of miner threads
    • -v, --av=N — algorithm variation, 0 auto select
    • -k, --keepalive — send keepalived packet for prevent timeout (needs pool support)
    • --nicehash — enable nicehash.com support
    • --tls — enable SSL/TLS support (needs pool support)
    • --tls-fingerprint=F — pool TLS certificate fingerprint, if set enable strict certificate pinning
    • -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
    • --asm=ASM — ASM code for cn/2, possible values: auto, none, intel, ryzen, bulldozer.
    • --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
    • --api-id=ID — custom instance ID for API
    • --api-ipv6 — enable IPv6 support for API
    • --api-no-restricted — enable full remote access (only if API token set)
    • --dry-run — test configuration and exit
    • -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:

14.920.04

FIRST VSAPI PATTERN DATE:

05 Apr 2019

VSAPI OPR PATTERN File:

14.921.00

VSAPI OPR PATTERN Date:

06 Apr 2019

Scan your computer with your Trend Micro product to delete files detected as Coinminer.PS1.MALXMR.MOX. 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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