General

  • Target

    lol.exe

  • Size

    9.2MB

  • Sample

    240523-rzn86see6x

  • MD5

    93296816398ac7ff5fc9d91f8d2765b2

  • SHA1

    f5817b3d34c22d0f847028797db143d75f592536

  • SHA256

    1d84ff128228995c275b3e6c05cd19e4e46fcb7574cbd7fb3934abb3df3d1129

  • SHA512

    fef4af08ce771ffad5eb500813052b93ff3c4c71711c03e9c9314fd16212b89fa14f77ca9f648c57617600c4fb932ebb7dd5bf97685e480106f79c98ac15885c

  • SSDEEP

    196608:tbVYKe7PFQhn5EQ9hNQAYzA5k6cTWDn7JKObS09BBI3:pzu25EWheYkv8LlB23

Malware Config

Targets

    • Target

      lol.exe

    • Size

      9.2MB

    • MD5

      93296816398ac7ff5fc9d91f8d2765b2

    • SHA1

      f5817b3d34c22d0f847028797db143d75f592536

    • SHA256

      1d84ff128228995c275b3e6c05cd19e4e46fcb7574cbd7fb3934abb3df3d1129

    • SHA512

      fef4af08ce771ffad5eb500813052b93ff3c4c71711c03e9c9314fd16212b89fa14f77ca9f648c57617600c4fb932ebb7dd5bf97685e480106f79c98ac15885c

    • SSDEEP

      196608:tbVYKe7PFQhn5EQ9hNQAYzA5k6cTWDn7JKObS09BBI3:pzu25EWheYkv8LlB23

    • Detect Umbral payload

    • Modifies WinLogon for persistence

    • Modifies visibility of file extensions in Explorer

    • Modifies visiblity of hidden/system files in Explorer

    • UAC bypass

    • Umbral

      Umbral stealer is an opensource moduler stealer written in C#.

    • Windows security bypass

    • njRAT/Bladabindi

      Widely used RAT written in .NET.

    • Disables RegEdit via registry modification

    • Drops file in Drivers directory

    • Manipulates Digital Signatures

      Attackers can apply techniques such as modifying certain DLL exports to make their binary seem valid.

    • .NET Reactor proctector

      Detects an executable protected by an unregistered version of Eziriz's .NET Reactor.

    • Executes dropped EXE

    • Modifies file permissions

    • Reads user/profile data of web browsers

      Infostealers often target stored browser data, which can include saved credentials etc.

    • Windows security modification

    • Adds Run key to start application

    • Checks whether UAC is enabled

    • Enumerates connected drives

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

    • Modifies WinLogon

    • Writes to the Master Boot Record (MBR)

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

    • AutoIT Executable

      AutoIT scripts compiled to PE executables.

    • Drops file in System32 directory

MITRE ATT&CK Matrix ATT&CK v13

Persistence

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

2
T1547.004

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Privilege Escalation

Boot or Logon Autostart Execution

3
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Winlogon Helper DLL

2
T1547.004

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Defense Evasion

Modify Registry

10
T1112

Hide Artifacts

2
T1564

Hidden Files and Directories

2
T1564.001

Abuse Elevation Control Mechanism

1
T1548

Bypass User Account Control

1
T1548.002

Impair Defenses

3
T1562

Disable or Modify Tools

3
T1562.001

File and Directory Permissions Modification

1
T1222

Pre-OS Boot

1
T1542

Bootkit

1
T1542.003

Credential Access

Unsecured Credentials

1
T1552

Credentials In Files

1
T1552.001

Discovery

System Information Discovery

5
T1082

Query Registry

3
T1012

Peripheral Device Discovery

1
T1120

Collection

Data from Local System

1
T1005

Tasks