Overview

overview

10

Static

static

7

er7PdfnR.exe

windows10-2004-x64

10

Sharing

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General

  • Target
    er7PdfnR.exe
  • Size 15.8MB
  • Sample240530-2z3fxaeb35
  • SHA256 ea20425e0ec34bea58cc32c62f0f5dfb03772aa4787f05b647d30dca153941b9
  • MD5 SHA1 SHA512 SSDEEP
Score
10/10
bootkitevasionexecutionpersistenceransomwarethemidatrojan

Malware Config

Targets

    • Target
      er7PdfnR.exe
    • Size 15.8MB
    • SHA256 ea20425e0ec34bea58cc32c62f0f5dfb03772aa4787f05b647d30dca153941b9
    • MD5 SHA1 SHA512 SSDEEP
    Score
    10/10
    bootkitevasionexecutionpersistenceransomwarethemidatrojan

    • Deletes NTFS Change Journal

      The USN change journal is a persistent log of all changes made to local files used by Windows Server systems.

      ransomware

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

      evasion

    • Sets DLL path for service in the registry

      persistence

    • Stops running service(s)

      evasionexecution

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

      themida

    • Checks whether UAC is enabled

      evasiontrojan

    • 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

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

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

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Defense Evasion

Impair Defenses

1
T1562

Modify Registry

1
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Discovery

Peripheral Device Discovery

2
T1120

Query Registry

5
T1012

System Information Discovery

6
T1082

Virtualization/Sandbox Evasion

1
T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Data Destruction

1
T1485

Inhibit System Recovery

1
T1490

Service Stop

1
T1489

Tasks