Overview

overview

10

Static

static

10

771f3bc23d...b3.exe

windows7-x64

10

771f3bc23d...b3.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    771f3bc23da9c40adfb3ba5869ecde3890681af6cb8ff9a0c9104b04be3307b3

  • Size

    952KB

  • Sample

    241223-aab4waskb1

  • MD5

    066ac67ff4803f8053decd2f83d5834e

  • SHA1

    4f9a371bbbb0d601d36eb150134397c8e2fb4b06

  • SHA256

    771f3bc23da9c40adfb3ba5869ecde3890681af6cb8ff9a0c9104b04be3307b3

  • SHA512

    9ffaf8455c3b36c6c06bd1fd7dd63544376ee5699769b14041186152a428a213be6174c55531cdd46896038d20297e27ccb90a167c1d1537bb73ec4bf516c305

  • SSDEEP

    24576:W+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:x8/KfRTK

Score
10/10
dcratevasioninfostealerpersistencerattrojan

Malware Config

Targets

    • Target

      771f3bc23da9c40adfb3ba5869ecde3890681af6cb8ff9a0c9104b04be3307b3

    • Size

      952KB

    • MD5

      066ac67ff4803f8053decd2f83d5834e

    • SHA1

      4f9a371bbbb0d601d36eb150134397c8e2fb4b06

    • SHA256

      771f3bc23da9c40adfb3ba5869ecde3890681af6cb8ff9a0c9104b04be3307b3

    • SHA512

      9ffaf8455c3b36c6c06bd1fd7dd63544376ee5699769b14041186152a428a213be6174c55531cdd46896038d20297e27ccb90a167c1d1537bb73ec4bf516c305

    • SSDEEP

      24576:W+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:x8/KfRTK

    Score
    10/10
    dcratevasioninfostealerpersistencerattrojan

    • 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.

    • UAC bypass

      evasiontrojan

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

      rat

    • Checks computer location settings

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

    • Executes dropped EXE

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      evasiontrojan

    • Drops file in System32 directory

    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

4
T1112

Credential Access

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks