Overview

overview

10

Static

static

3

JaffaCakes...2a.exe

windows7-x64

10

JaffaCakes...2a.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    JaffaCakes118_c95ac454cf5cab75cd487ccb82ee5d2a

  • Size

    3.3MB

  • Sample

    250109-qsv8ga1lav

  • MD5

    c95ac454cf5cab75cd487ccb82ee5d2a

  • SHA1

    5098362ca55b5c1b4e22685f5a3fd7d2752df2e9

  • SHA256

    91704a8d50393554e16e3cb1c4323a1ac3fd69ec86c503f86cf2736965abea3b

  • SHA512

    782cb16c300eb5dad7862772aa6072224884349f64de5e876ce59bd2d7cf6ecaf4ffd096c3fb825404821394538f6950990c19b26182cdd4ef29f2bed331f8ce

  • SSDEEP

    98304:jLozdB/qu2Ae/tYgFgYYU9xA+X6PwBZ9McLu:vozdYBYU9UwBZDu

Score
10/10
dcratbootkitdiscoveryevasioninfostealerpersistencerattrojan

Malware Config

Targets

    • Target

      JaffaCakes118_c95ac454cf5cab75cd487ccb82ee5d2a

    • Size

      3.3MB

    • MD5

      c95ac454cf5cab75cd487ccb82ee5d2a

    • SHA1

      5098362ca55b5c1b4e22685f5a3fd7d2752df2e9

    • SHA256

      91704a8d50393554e16e3cb1c4323a1ac3fd69ec86c503f86cf2736965abea3b

    • SHA512

      782cb16c300eb5dad7862772aa6072224884349f64de5e876ce59bd2d7cf6ecaf4ffd096c3fb825404821394538f6950990c19b26182cdd4ef29f2bed331f8ce

    • SSDEEP

      98304:jLozdB/qu2Ae/tYgFgYYU9xA+X6PwBZ9McLu:vozdYBYU9UwBZDu

    Score
    10/10
    dcratbootkitdiscoveryevasioninfostealerpersistencerattrojan

    • DcRat

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

      ratinfostealerdcrat

    • Dcrat family

      dcrat

    • Process spawned unexpected child process

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

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

      rat

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

      evasion

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Executes dropped EXE

    • Identifies Wine through registry keys

      Wine is a compatibility layer capable of running Windows applications, which can be used as sandboxing environment.

      evasion

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • Checks whether UAC is enabled

      evasiontrojan

    • Writes to the Master Boot Record (MBR)

      Bootkits write to the MBR to gain persistence at a level below the operating system.

      bootkitpersistence

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    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

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Scheduled Task/Job

1
T1053

Scheduled Task

1
T1053.005

Defense Evasion

Modify Registry

1
T1112

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Virtualization/Sandbox Evasion

2
T1497

Credential Access

Discovery

Query Registry

5
T1012

System Information Discovery

4
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Virtualization/Sandbox Evasion

2
T1497

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks