Overview

overview

10

Static

static

3

f88cc7a80f...bb.exe

windows7-x64

10

f88cc7a80f...bb.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    f88cc7a80fe0f1d450c11a28bdd09c833e1c463f3dcb88098d454ad4b9d24ebb

  • Size

    2.1MB

  • Sample

    250207-cgh7wavkfz

  • MD5

    c6a02c990fb951ba0ced642a4daa9845

  • SHA1

    76229ba125995c44227ee1f598dd6510b19fd646

  • SHA256

    f88cc7a80fe0f1d450c11a28bdd09c833e1c463f3dcb88098d454ad4b9d24ebb

  • SHA512

    6bdf39e8e5adb6babde6b8609d585e62c31f2725897bde515d4d592bb7403e0bd59b735c30f572c8d80b64a6ce561c4e6c7a1d54fa1980b9459a8976432f2b36

  • SSDEEP

    49152:IBJv/xDnYHGnSvxNGxcz+NYJxe1oaz/eccZa:yRhnYHZUczjaz/PUa

Score
10/10
dcratdiscoveryexecutioninfostealerpersistencerat

Malware Config

Targets

    • Target

      f88cc7a80fe0f1d450c11a28bdd09c833e1c463f3dcb88098d454ad4b9d24ebb

    • Size

      2.1MB

    • MD5

      c6a02c990fb951ba0ced642a4daa9845

    • SHA1

      76229ba125995c44227ee1f598dd6510b19fd646

    • SHA256

      f88cc7a80fe0f1d450c11a28bdd09c833e1c463f3dcb88098d454ad4b9d24ebb

    • SHA512

      6bdf39e8e5adb6babde6b8609d585e62c31f2725897bde515d4d592bb7403e0bd59b735c30f572c8d80b64a6ce561c4e6c7a1d54fa1980b9459a8976432f2b36

    • SSDEEP

      49152:IBJv/xDnYHGnSvxNGxcz+NYJxe1oaz/eccZa:yRhnYHZUczjaz/PUa

    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

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Looks up external IP address via web service

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

    • Drops file in System32 directory

    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

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

3
T1112

Subvert Trust Controls

1
T1553

Install Root Certificate

1
T1553.004

Credential Access

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

Command and Control

Exfiltration

Impact

Tasks