Overview

overview

10

Static

static

10

2026-04-21...ry.exe

windows10-2004-x64

9

2026-04-21...ry.exe

windows11-21h2-x64

9

Sharing

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General

  • Target
    2026-04-21_436da7b48e9679cf172f061e0da63561_coinminer_elex_wannacry
  • Size 586KB
  • Sample260421-lrbefsct3r
  • SHA256 496c103db9fe25e45c8a15292847a9f4dc384d51d882f77097a789ae206ccdfd
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
10/10
bootkitdiscoverypersistencespywarestealerupx

Malware Config

Targets

    • Target
      2026-04-21_436da7b48e9679cf172f061e0da63561_coinminer_elex_wannacry
    • Size 586KB
    • SHA256 496c103db9fe25e45c8a15292847a9f4dc384d51d882f77097a789ae206ccdfd
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    9/10
    bootkitdiscoverypersistencespywarestealerupx
    • Custom signature

      Detects executables containing base64 encoded User Agent

    • Custom signature

      UPX dump on OEP (original entry point)

    • Deletes itself

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

      spywarestealer

    • Adds Run key to start application

      persistence

    • Enumerates connected drives

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

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

      upx
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Modify Registry

1
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Credentials from Password Stores

1
T1555

Credentials from Web Browsers

1
T1555.003

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

2
T1012

Remote System Discovery

1
T1018

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Data from Local System

1
T1005

Command and Control

Exfiltration

Impact

Tasks