Analysis

  • max time kernel
    151s
  • max time network
    123s
  • platform
    windows7_x64
  • resource
    win7-20230831-en
  • resource tags

    arch:x64arch:x86image:win7-20230831-enlocale:en-usos:windows7-x64system
  • submitted
    11-10-2023 20:07

General

  • Target

    ZYu4eR.exe

  • Size

    458KB

  • MD5

    a7220cc1827fca75b6e74efe59a8ea77

  • SHA1

    836c066fff10ad423134f863528f4ec3d3e95962

  • SHA256

    731457e4704d299b353e802b72a6908dfa2124cbb5130b8cb9a943c6be6bcdc6

  • SHA512

    90cda9290fbc28187da837c4829fa1cd0084a58c87e58b6ddb0e70340b334507233bc0ab2c858462824e21babaaf2118dee68513e5c87fa7126d46bce5d38b21

  • SSDEEP

    6144:4/MZO4aLcwC0IEVvO2UcxnwMSKY3m5MzrTV/yqUKmLzmZhbVPcK7lKWp+:4XiwC0pVvOwxSCirEXKPZh+Kdp+

Malware Config

Signatures

  • PLAY Ransomware, PlayCrypt

    Ransomware family first seen in mid 2022.

  • Renames multiple (8480) files with added filename extension

    This suggests ransomware activity of encrypting all the files on the system.

  • Reads user/profile data of web browsers 2 TTPs

    Infostealers often target stored browser data, which can include saved credentials etc.

  • Drops desktop.ini file(s) 39 IoCs
  • Enumerates connected drives 3 TTPs 23 IoCs

    Attempts to read the root path of hard drives other than the default C: drive.

  • Drops file in Program Files directory 64 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ZYu4eR.exe
    "C:\Users\Admin\AppData\Local\Temp\ZYu4eR.exe"
    1⤵
    • Drops desktop.ini file(s)
    • Enumerates connected drives
    • Drops file in Program Files directory
    PID:1376

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\$Recycle.Bin\S-1-5-21-86725733-3001458681-3405935542-1000\desktop.ini

    Filesize

    1KB

    MD5

    937c48233853189d65538e21d18e26de

    SHA1

    2ecedb3185e4d7b4d7c97fcbba1ff02bd7361051

    SHA256

    b2a7a590a8b17d52d4fb7146242df571ae0c18ec5c3eb933a58233b2c216c8d6

    SHA512

    8a9540e54b64f8ec807cda13c79c6c855abc9d0b12f129dd30ef4ab1207fbf8bb77dba8cc6223e4d3cdde46961b9856e3c012eb587cb75bdc56b0a65776bb7a7

  • memory/1376-0-0x0000000000170000-0x000000000019C000-memory.dmp

    Filesize

    176KB