Overview

overview

10

Static

static

3

AstralprivateDLL.exe

windows7-x64

10

AstralprivateDLL.exe

windows10-2004-x64

10

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General

  • Target

    AstralprivateDLL.exe

  • Size

    65.7MB

  • Sample

    241120-j8hhzstqaw

  • MD5

    c9f4668c97eb480751e1bbf6173fc4e1

  • SHA1

    528deade2bc88cafc26f78f7c73490b66abdf370

  • SHA256

    b9f8572fc7a8a6c2230434abb7190ae860f28386b3f0d5e5ee3754c6befca240

  • SHA512

    dd1d2499a2fca08181e43ea53138b3001d5674f2197c8962681bea188a07687feeb19b5bb8fb35e2339739e7df7b2bc2b2166bf02733bb3cf01f90571f874f41

  • SSDEEP

    196608:27H3VIb7wjJfQqkGCaG1R8uzSJzbwHyokFpz/ehFCIUmF4tDDnYdBaUqkM9h8:s6vwmRR85JPwHyjIgIPCRnYBY

Score
10/10
dcratdefense_evasiondiscoveryevasionexecutioninfostealerpersistenceratspywarestealer

Malware Config

Targets

    • Target

      AstralprivateDLL.exe

    • Size

      65.7MB

    • MD5

      c9f4668c97eb480751e1bbf6173fc4e1

    • SHA1

      528deade2bc88cafc26f78f7c73490b66abdf370

    • SHA256

      b9f8572fc7a8a6c2230434abb7190ae860f28386b3f0d5e5ee3754c6befca240

    • SHA512

      dd1d2499a2fca08181e43ea53138b3001d5674f2197c8962681bea188a07687feeb19b5bb8fb35e2339739e7df7b2bc2b2166bf02733bb3cf01f90571f874f41

    • SSDEEP

      196608:27H3VIb7wjJfQqkGCaG1R8uzSJzbwHyokFpz/ehFCIUmF4tDDnYdBaUqkM9h8:s6vwmRR85JPwHyjIgIPCRnYBY

    Score
    10/10
    dcratdefense_evasiondiscoveryevasionexecutioninfostealerpersistenceratspywarestealer

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

      ratinfostealerdcrat

    • Dcrat family

      dcrat

    • Modifies WinLogon for persistence

      persistence

    • Modifies security service

      evasion

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • Command and Scripting Interpreter: PowerShell

      Using powershell.exe command.

      execution

    • Disables Task Manager via registry modification

      evasion

    • Stops running service(s)

      evasionexecution

    • Checks computer location settings

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

    • Executes dropped EXE

    • Indicator Removal: Clear Windows Event Logs

      Clear Windows Event Logs to hide the activity of an intrusion.

      defense_evasion

    • 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

    • Legitimate hosting services abused for malware hosting/C2

    • Power Settings

      powercfg controls all configurable power system settings on a Windows system and can be abused to prevent an infected host from locking or shutting down.

      persistence

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

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

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Power Settings

1
T1653

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Impair Defenses

1
T1562

Indicator Removal

1
T1070

Clear Windows Event Logs

1
T1070.001

Modify Registry

4
T1112

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

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

Web Service

1
T1102

Exfiltration

Impact

Service Stop

1
T1489

Tasks