General

  • Target

    MEGALOADER.exe

  • Size

    1.7MB

  • Sample

    240630-b7glasvhlj

  • MD5

    ac4c9d6cd24a44a660c69bf7b55f17b0

  • SHA1

    e41107db8aad88bb26d1879db7aed31e91942644

  • SHA256

    f5fb3ae5ca25c16f178ca10c99aa7b4af70dc38fd806aef46d662c6ab40aab78

  • SHA512

    0b1ee2a0c3a1c73d9ce53111df250c2c36d4dcc38ac9426bede09c8eb9a274aadb671e86018073c62abd7c09726ff878ccf1001240754e9bef3948e0a2130c4f

  • SSDEEP

    24576:O2G/nvxW3Wir0g0bcg1vqd25Gl35KcbOwGqq+AZbPxtDSk5/FX5vDlIXNQdSR:ObA3dogGy/3dSnEYFJvxSN

Malware Config

Targets

    • Target

      MEGALOADER.exe

    • Size

      1.7MB

    • MD5

      ac4c9d6cd24a44a660c69bf7b55f17b0

    • SHA1

      e41107db8aad88bb26d1879db7aed31e91942644

    • SHA256

      f5fb3ae5ca25c16f178ca10c99aa7b4af70dc38fd806aef46d662c6ab40aab78

    • SHA512

      0b1ee2a0c3a1c73d9ce53111df250c2c36d4dcc38ac9426bede09c8eb9a274aadb671e86018073c62abd7c09726ff878ccf1001240754e9bef3948e0a2130c4f

    • SSDEEP

      24576:O2G/nvxW3Wir0g0bcg1vqd25Gl35KcbOwGqq+AZbPxtDSk5/FX5vDlIXNQdSR:ObA3dogGy/3dSnEYFJvxSN

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • UAC bypass

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • Command and Scripting Interpreter: PowerShell

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

    • Disables Task Manager via registry modification

    • Checks computer location settings

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Checks whether UAC is enabled

    • Legitimate hosting services abused for malware hosting/C2

MITRE ATT&CK Matrix ATT&CK v13

Execution

Command and Scripting Interpreter

1
T1059

PowerShell

1
T1059.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Persistence

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

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

3
T1112

Discovery

Query Registry

2
T1012

System Information Discovery

3
T1082

Command and Control

Web Service

1
T1102

Tasks