Overview

overview

9

Static

static

7

Update.exe

windows10-2004-x64

9

Update.exe

windows11-ltsc_2024-x64

9

Sharing

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General

  • Target
    Update.exe
  • Size 3.2MB
  • Sample260813-t5kjaacm6w
  • SHA256 fca74f116e3d48b62d7944ce01458939408fe6aebb37e5f7f8f9ffc1c6e97780
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
9/10
backdoordefense_evasiondiscoverypersistenceprivilege_escalationratrevoked_codesignthemidatrojan

Malware Config

Targets

    • Target
      Update.exe
    • Size 3.2MB
    • SHA256 fca74f116e3d48b62d7944ce01458939408fe6aebb37e5f7f8f9ffc1c6e97780
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    9/10
    backdoordefense_evasiondiscoverypersistenceprivilege_escalationratrevoked_codesignthemidatrojan

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

      defense_evasion

    • Sets service image path in registry

      This determines the executable launched when a service starts. It can be used to establish persistence.

      persistence

    • Signed with revoked ConnectWise certificate

      Binary is signed using a ConnectWise certificate revoked for key compromise.

      revoked_codesign

    • Checks BIOS information in registry

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

    • ConnectWise ScreenConnect remote access tool

      ConnectWise ScreenConnect is a remote desktop tool that can be used as a backdoor.

      backdoorrat

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

      themida

    • Enumerates connected drives

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

    • Boot or Logon Autostart Execution: Authentication Package

      Suspicious Windows Authentication Registry Modification.

      persistenceprivilege_escalation

    • Drops file in System32 directory

    • Event Triggered Execution: Component Object Model Hijacking

      Adversaries may establish persistence by executing malicious content triggered by hijacked references to Component Object Model (COM) objects.

      persistenceprivilege_escalation
    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Persistence

Boot or Logon Autostart Execution

2
T1547

Authentication Package

1
T1547.002

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Component Object Model Hijacking

1
T1546.015

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Authentication Package

1
T1547.002

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Event Triggered Execution

1
T1546

Component Object Model Hijacking

1
T1546.015

Defense Evasion

Modify Registry

1
T1112

Virtualization/Sandbox Evasion

1
T1497

Credential Access

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

4
T1012

System Information Discovery

4
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Virtualization/Sandbox Evasion

1
T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks