Overview

overview

10

Static

static

3

8a23e0ccbd...fc.exe

windows7-x64

10

8a23e0ccbd...fc.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    8a23e0ccbd2027831ff07599f03b5c1324e080f9415983746de29a6c6ab695fc.exe

  • Size

    1.5MB

  • Sample

    240828-cdc7fssbmq

  • MD5

    31f61e9c68256b4cc089b3703c0e2039

  • SHA1

    5ed8cecacc5e6165d43ee91787f72846d2e8ad01

  • SHA256

    8a23e0ccbd2027831ff07599f03b5c1324e080f9415983746de29a6c6ab695fc

  • SHA512

    ae48468132212e4756864fe7ce22d55c35d53cadd482aebabd62ec9d724ea3786879d9364563613140a43fa6c63a6c5cc1ee1775e4e0e9977aee3b748d8a6df1

  • SSDEEP

    24576:yuDXTIGaPhEYzUzA0bOvbKAO1WMbkiSfLAo9Ffze20S4OIsAMWlXl9h2DvpfsTCu:1Djlabwz9Sv61kiQKvS4OUMI4hfaD

Score
10/10
dcratumbraldiscoveryevasioninfostealerpersistenceratstealertrojan

Malware Config

Targets

    • Target

      8a23e0ccbd2027831ff07599f03b5c1324e080f9415983746de29a6c6ab695fc.exe

    • Size

      1.5MB

    • MD5

      31f61e9c68256b4cc089b3703c0e2039

    • SHA1

      5ed8cecacc5e6165d43ee91787f72846d2e8ad01

    • SHA256

      8a23e0ccbd2027831ff07599f03b5c1324e080f9415983746de29a6c6ab695fc

    • SHA512

      ae48468132212e4756864fe7ce22d55c35d53cadd482aebabd62ec9d724ea3786879d9364563613140a43fa6c63a6c5cc1ee1775e4e0e9977aee3b748d8a6df1

    • SSDEEP

      24576:yuDXTIGaPhEYzUzA0bOvbKAO1WMbkiSfLAo9Ffze20S4OIsAMWlXl9h2DvpfsTCu:1Djlabwz9Sv61kiQKvS4OUMI4hfaD

    Score
    10/10
    dcratumbraldiscoveryevasioninfostealerpersistenceratstealertrojan

    • DcRat

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

      ratinfostealerdcrat

    • Detect Umbral payload

    • Modifies WinLogon for persistence

      persistence

    • Process spawned unexpected child process

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

    • UAC bypass

      evasiontrojan

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

      stealerumbral

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

      rat

    • Disables Task Manager via registry modification

      evasion

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      evasiontrojan

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

1
T1547.004

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

1
T1562

Disable or Modify Tools

1
T1562.001

Modify Registry

5
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks