Overview

overview

10

Static

static

ExamShield...er.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    ExamShieldLauncher.exe

  • Size

    1MB

  • Sample

    220907-g3ztzabbf8

  • MD5

    98f879d15eb0cb66b16fbe84edb1ad32

  • SHA1

    4a1c9b961ed8b2fdb61855169b822dd28e1a8239

  • SHA256

    e1f4ad954e8e13bd5119f7aa2ea8870079287addfa6ce12eaaf106739672b8e9

  • SHA512

    37d66e8c4dc423ffb25d4aff41f33f94b67fe0f85ce81444086e609f9f9727a997e731301588483ad926f2756557e40a46a7ebbfbce2638fccba21363f5cbb19

  • SSDEEP

    49152:TleXbhrNfgqTzEin+caW8qLTWkceK4RVlkuXXGlc3KAMNmIlQJUJeJeXVi0w:TcbpNfgqTzUcyqLTjceTRVlkud3KA5Io

Score
10/10
asyncratcoreentitydiscoveryevasionrat

Malware Config

Targets

    • Target

      ExamShieldLauncher.exe

    • Size

      1MB

    • MD5

      98f879d15eb0cb66b16fbe84edb1ad32

    • SHA1

      4a1c9b961ed8b2fdb61855169b822dd28e1a8239

    • SHA256

      e1f4ad954e8e13bd5119f7aa2ea8870079287addfa6ce12eaaf106739672b8e9

    • SHA512

      37d66e8c4dc423ffb25d4aff41f33f94b67fe0f85ce81444086e609f9f9727a997e731301588483ad926f2756557e40a46a7ebbfbce2638fccba21363f5cbb19

    • SSDEEP

      49152:TleXbhrNfgqTzEin+caW8qLTWkceK4RVlkuXXGlc3KAMNmIlQJUJeJeXVi0w:TcbpNfgqTzUcyqLTjceTRVlkud3KA5Io

    Score
    10/10
    asyncratcoreentitydiscoveryevasionrat

    • AsyncRat

      AsyncRAT is designed to remotely monitor and control other computers.

      ratasyncrat

    • CoreEntity .NET Packer

      A .NET packer called CoreEntity where it has embedded the payload as a BitMap object which is later decrypted.

      coreentity

    • Async RAT payload

      rat

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Modifies Windows Firewall

      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.

    • Loads dropped DLL

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

      discovery

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    behavioral1

MITRE ATT&CK Matrix

Collection

Command and Control

Credential Access

Defense Evasion

Modify Registry

1
T1112

Install Root Certificate

1
T1130

Discovery

Query Registry

5
T1012

System Information Discovery

6
T1082

Peripheral Device Discovery

2
T1120

Execution

Command-Line Interface

1
T1059

Exfiltration

Impact

Initial Access

Lateral Movement

Persistence

Modify Existing Service

1
T1031

Privilege Escalation

Tasks