Overview

overview

10

Static

static

10

fe78f6e2b4...7N.exe

windows7-x64

10

fe78f6e2b4...7N.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    fe78f6e2b4e88176dab282d4b56de4d8038f497a11f2ffcc49c3d33149309707N.exe

  • Size

    952KB

  • Sample

    250125-vnsn1asmbx

  • MD5

    2441dd3f0b62cd42f120a14c333cb3f0

  • SHA1

    77cf4605fddd9e854039648c028810a04c43427b

  • SHA256

    fe78f6e2b4e88176dab282d4b56de4d8038f497a11f2ffcc49c3d33149309707

  • SHA512

    4ab200a53e2b58b2ee95ba9808f720683ec55d8b9449f21a044bd804925653dde29019c91f64178f91b9caec5ef5bbf0ebf8a35ab2a937780da7e6af2d9a4b48

  • SSDEEP

    24576:u+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:p8/KfRTK

Score
10/10
dcratdefense_evasioninfostealerpersistencerattrojan

Malware Config

Targets

    • Target

      fe78f6e2b4e88176dab282d4b56de4d8038f497a11f2ffcc49c3d33149309707N.exe

    • Size

      952KB

    • MD5

      2441dd3f0b62cd42f120a14c333cb3f0

    • SHA1

      77cf4605fddd9e854039648c028810a04c43427b

    • SHA256

      fe78f6e2b4e88176dab282d4b56de4d8038f497a11f2ffcc49c3d33149309707

    • SHA512

      4ab200a53e2b58b2ee95ba9808f720683ec55d8b9449f21a044bd804925653dde29019c91f64178f91b9caec5ef5bbf0ebf8a35ab2a937780da7e6af2d9a4b48

    • SSDEEP

      24576:u+O7F9smBDJwWmIezBLwsHuWbxR4AK5ZJXX:p8/KfRTK

    Score
    10/10
    dcratdefense_evasioninfostealerpersistencerattrojan

    • 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

      defense_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

      defense_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