Overview

overview

10

Static

static

3

NerestPC f....1.exe

windows10-2004-x64

10

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General

  • Target

    NerestPC free.zip

  • Size

    10.3MB

  • Sample

    241214-vg2nbszpdk

  • MD5

    ce1cc9b7e6f2ad2ef897942565b16db7

  • SHA1

    9816b0bdf142acb7e2f92990221ec099f03b5662

  • SHA256

    ad8d4a6b44aa1d12db0966ddcf16e07942efce4e3f7303c0845864f7f18bbc91

  • SHA512

    5b8b5367a0a240e42b6c68d824ddd4376d5fff02caf5a5210c27f0127b302fc36828036fe543364af940c58dc014b70dd6d75d9292a8c16e9f87902126432f6b

  • SSDEEP

    196608:PQGmZUqD06w5KEiZcOoLcaQeEgK6Sq//l7Hl67zxQEZ84ezi8Nt7U:P34RxhEQcxLMefdSSBHqiEuviU7U

Score
10/10
dcratdiscoveryevasionexecutioninfostealerpersistencerat

Malware Config

Targets

    • Target

      NerestPC free/NerestPCFree 0.31.1.exe

    • Size

      7.0MB

    • MD5

      9d0a77bd28d67eab798c50f0c6a24b64

    • SHA1

      2de59eddd73ab784cc8f791cd96d7f81741ccae3

    • SHA256

      a35479bc985fe56167b824f5d0d9ff96598af672afe8785bc9f87815c11393dc

    • SHA512

      25ca283707b61c8149615f7e7958edb886378702ecbcf079191698d686b4a7a39d1be655e44ccf2752e569481e9eb25f3a10e59322c0c97c7e858fb5f9eabb17

    • SSDEEP

      196608:i46iIYMaKuKGfjtVlQqtolrkiBJk3b8pA2uW3c:i7YpBDtVlmlgyJ0r

    Score
    10/10
    dcratdiscoveryevasionexecutioninfostealerpersistencerat

    • 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

    • 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

      Run Powershell to modify Windows Defender settings to add exclusions for file extensions, paths, and processes.

      execution

    • Stops running service(s)

      evasionexecution

    • Checks computer location settings

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

    • Executes dropped EXE

    • 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

    behavioral1

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

1
T1543

Windows Service

1
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

1
T1543

Windows Service

1
T1543.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Impair Defenses

1
T1562

Modify Registry

2
T1112

Credential Access

Discovery

Peripheral Device Discovery

1
T1120

Query Registry

5
T1012

Remote System Discovery

1
T1018

System Information Discovery

5
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

Command and Control

Web Service

1
T1102

Exfiltration

Impact

Service Stop

1
T1489

Tasks