Overview

overview

8

Static

static

3

SumatraPDF.exe

windows10-2004-x64

8

SumatraPDF.exe

windows11-ltsc_2024-x64

8

Sharing

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General

  • Target
    SumatraPDF.exe
  • Size 1.2MB
  • Sample260702-tb6veshs4v
  • SHA256 242a868105d24e3f0c7621dbe5465ac5340bfe03ed12cc48943b3a5b8cd8185c
  • MD5 SHA1 SHA512 SSDEEP TLSH
Score
8/10
costuraexecutionpackerpersistence

Malware Config

Targets

    • Target
      SumatraPDF.exe
    • Size 1.2MB
    • SHA256 242a868105d24e3f0c7621dbe5465ac5340bfe03ed12cc48943b3a5b8cd8185c
    • MD5 SHA1 SHA512 SSDEEP TLSH
    Score
    8/10
    costuraexecutionpackerpersistence

    • Command and Scripting Interpreter: PowerShell

      Run Powershell and hide display window.

      execution

    • Server Software Component: Terminal Services DLL

      persistence

    • Sets service image path in registry

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

      persistence

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v16

Reconnaissance

Resource Development

Initial Access

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Server Software Component

1
T1505

Terminal Services DLL

1
T1505.005

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Create or Modify System Process

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks