Overview

overview

9

Static

static

1

byesu-zz.json

windows10-ltsc_2021-x64

9

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General

  • Target
    byesu-zz.json
  • Size 166KB
  • Sample260731-lt9p2adr31
  • SHA256 b9579624d79238ae1ac1206813b3d9dc3816175597363a0aceb30fea1db0a97f
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
defense_evasiondiscoveryexecutionpersistenceransomwarespywaretrojan

Malware Config

Targets

    • Target
      byesu-zz.json
    • Size 166KB
    • SHA256 b9579624d79238ae1ac1206813b3d9dc3816175597363a0aceb30fea1db0a97f
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    9/10
    defense_evasiondiscoveryexecutionpersistenceransomwarespywaretrojan

    • Renames multiple (6110) files with added filename extension

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

      ransomware

    • Downloads MZ/PE file

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Drops file in System32 directory

    behavioral1

MITRE ATT&CK Enterprise v16

Tasks