Overview

overview

10

Static

static

3

WinPerfcommon.exe

windows7-x64

10

WinPerfcommon.exe

windows10-2004-x64

10

WinPerfcommon.exe

windows10-ltsc 2021-x64

10

WinPerfcommon.exe

windows11-21h2-x64

10

Sharing

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General

  • Target

    WinPerfcommon.exe

  • Size

    1.9MB

  • Sample

    241216-2qj8zasmct

  • MD5

    6b9554367a439d39a00a0dff9a08b123

  • SHA1

    e1d22cde90c297c10f4fcba5b3980e5d551eb0b3

  • SHA256

    3332277b9e53375e998ccf981cdb0519fea7721b5e79a3d7a60b83f448f6c0a9

  • SHA512

    72ffbca1a2aa7cd2bb6b963d97b43d7d5eab9a11d09c647c7679e71877927b8c021e28cd1e28ae9ac5300c8621ba97aae6699e1abddc58be89c9bb3e84d1c720

  • SSDEEP

    49152:xh0kcmcdp/caMMlawkBXRInaKYRouPbWGQ2:xhbcmcfM/N1RSavoujWH

Score
10/10
dcratdiscoveryexecutioninfostealerpersistencerat

Malware Config

Targets

    • Target

      WinPerfcommon.exe

    • Size

      1.9MB

    • MD5

      6b9554367a439d39a00a0dff9a08b123

    • SHA1

      e1d22cde90c297c10f4fcba5b3980e5d551eb0b3

    • SHA256

      3332277b9e53375e998ccf981cdb0519fea7721b5e79a3d7a60b83f448f6c0a9

    • SHA512

      72ffbca1a2aa7cd2bb6b963d97b43d7d5eab9a11d09c647c7679e71877927b8c021e28cd1e28ae9ac5300c8621ba97aae6699e1abddc58be89c9bb3e84d1c720

    • SSDEEP

      49152:xh0kcmcdp/caMMlawkBXRInaKYRouPbWGQ2:xhbcmcfM/N1RSavoujWH

    Score
    10/10
    dcratdiscoveryexecutioninfostealerpersistencerat

    • 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.

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Drops file in System32 directory

    behavioral1behavioral2behavioral3behavioral4

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

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

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

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

2
T1012

Remote System Discovery

1
T1018

System Information Discovery

2
T1082

System Network Configuration Discovery

1
T1016

Internet Connection Discovery

1
T1016.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks