Coinminer.Win64.MALXMR.TIAOODFZ

 Analysis by: Bren Matthew Ebriega

 ALIASES:

HEUR:RiskTool.Win32.BitCoinMiner.gen (KASPERSKY); W64/CryptoMiner.L!tr (FORTINET)

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

  TECHNICAL DETAILS

File Size:

6,413,824 bytes

Memory Resident:

No

Initial Samples Received Date:

11 Apr 2021

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 requires the existence of the following files to properly run:

  • {Coinminer Directory}\config.json

It does the following:

  • It supports the following algorithm options:
    • argon2/chukwa
    • argon2/wrkz
    • chukwa
    • cryptonight
    • cryptonight/0
    • cryptonight/1
    • cryptonight/2
    • cryptonight/double
    • cryptonight/fast
    • cryptonight/gpu
    • cryptonight/half
    • cryptonight/msr
    • cryptonight/r
    • cryptonight/rto
    • cryptonight/rwz
    • cryptonight/xao
    • cryptonight/zls
    • cryptonight_alloy
    • cryptonight_gpu
    • cryptonight_haven
    • cryptonight_heavy
    • cryptonight_lite
    • cryptonight_lite_v7
    • cryptonight_r
    • cryptonight_turtle
    • cryptonight_v7
    • cryptonight_v8
    • cryptonight-aeonv7
    • cryptonight-bittube2
    • cryptonight-heavy
    • cryptonight-heavy/0
    • cryptonight-heavy/tube
    • cryptonight-heavy/xhv
    • cryptonight-light
    • cryptonight-lite
    • cryptonight-lite/0
    • cryptonight-lite/1
    • cryptonight-monerov7
    • cryptonight-monerov8
    • cryptonight-pico
    • cryptonight-pico/trtl
    • cryptonight-turtle
    • cryptonight-ultralite
    • RandomARQ
    • RandomWOW
    • RandomX
    • randomx/0
    • randomx/arq
    • randomx/loki
    • randomx/test
    • randomx/wow
    • RandomXL
  • It supports the following coin options:
    • monero
    • xmr
    • arqma
    • arq

It accepts the following parameters:

  • Network:
    • -o, --url=URL -> URL of mining server
    • -a, --algo=ALGO -> mining algorithm https://xmrig.com/docs/algorithms
    • -u, --user=USERNAME -> username for mining server
    • -p, --pass=PASSWORD -> password for mining server
    • -O, --userpass=U:P -> username:password pair for mining server
    • -k, --keepalive -> send keepalived packet for prevent timeout (needs 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)
    • --coin=COIN -> specify coin instead of algorithm
    • --nicehash -> enable nicehash.com support
    • --rig-id=ID -> rig identifier for pool-side statistics (needs pool support)
    • --tls -> enable SSL/TLS support (needs pool support)
    • --tls-fingerprint=HEX -> pool TLS certificate fingerprint for strict certificate pinning
    • --daemon -> use daemon RPC instead of pool for solo mining
    • --daemon-poll-interval=N -> daemon poll interval in milliseconds (default: 1000)
    • --self-select=URL -> self-select block templates from URL
    • --user-agent -> set custom user-agent string for pool
    • --donate-level=N -> donate level, default 5%% (5 minutes in 100 minutes)
    • --donate-over-proxy=N -> control donate over xmrig-proxy feature
  • CPU backend:
    • -t, --threads=N -> number of CPU threads
    • -v, --av=N -> algorithm variation, 0 auto select
    • --no-cpu -> disable CPU mining backend
    • --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)
    • --cpu-max-threads-hint=N maximum CPU threads count (in percentage) hint for autoconfig
    • --cpu-memory-pool=N -> number of 2 MB pages for persistent memory pool, -1 (auto), 0 (disable)
    • --cpu-no-yield -> prefer maximum hashrate rather than system response/stability
    • --no-huge-pages -> disable huge pages support
    • --asm=ASM -> ASM optimizations, possible values: auto, none, intel, ryzen, bulldozer
    • --randomx-init=N -> threads count to initialize RandomX dataset
    • --randomx-no-numa -> disable NUMA support for RandomX
    • --randomx-mode=MODE -> RandomX mode: auto, fast, light
  • API:
    • --api-worker-id=ID -> custom worker-id for API
    • --api-id=ID -> custom instance ID for API
    • --http-host=HOST -> bind host for HTTP API (default: 127.0.0.1)
    • --http-port=N -> bind port for HTTP API
    • --http-access-token=T -> access token for HTTP API
    • --http-no-restricted -> enable full remote access to HTTP API (only if access token set)
  • OpenCL backend:
    • --opencl -> enable OpenCL mining backend
    • --opencl-devices=N -> comma separated list of OpenCL devices to use
    • --opencl-platform=N -> OpenCL platform index or name
    • --opencl-loader=PATH -> path to OpenCL-ICD-Loader (OpenCL.dll or libOpenCL.so)
    • --opencl-no-cache -> disable OpenCL cache
    • --print-platforms -> print available OpenCL platforms and exit
  • CUDA backend:
    • --cuda -> enable CUDA mining backend
    • --cuda-loader=PATH -> path to CUDA plugin (xmrig-cuda.dll or libxmrig-cuda.so)
    • --cuda-devices=N -> comma separated list of CUDA devices to use
    • --cuda-bfactor-hint=N -> bfactor hint for autoconfig (0-12)
    • --cuda-bsleep-hint=N -> bsleep hint for autoconfig
    • --no-nvml -> disable NVML (NVIDIA Management Library) support
  • Logging:
    • -l, --log-file=FILE -> log all output to a file
    • --print-time=N -> print hashrate report every N seconds
    • --health-print-time=N -> print health report every N seconds
    • --no-color -> disable colored output
  • Misc:
    • -c, --config=FILE -> load a JSON-format configuration file
    • -B, --background -> run the miner in the background
    • -V, --version -> output version information and exit
    • -h, --help -> display this help and exit
    • --dry-run -> test configuration and exit
    • --export-topology -> export hwloc topology to a XML file 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:

9.800

FIRST VSAPI PATTERN FILE:

16.650.05

FIRST VSAPI PATTERN DATE:

11 Apr 2021

VSAPI OPR PATTERN File:

16.651.00

VSAPI OPR PATTERN Date:

12 Apr 2021

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.MALXMR.TIAOODFZ. 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:


Did this description help? Tell us how we did.