General

  • Target

    lol.exe

  • Size

    13.1MB

  • Sample

    240523-s1ftvsfh3z

  • MD5

    621d4a616715d165ed2c10e48e5fd94b

  • SHA1

    7fabfdb5167e59d0442df460e1b236cb5bc75fbe

  • SHA256

    7975eec3959bed57e86fb6fa917503a7a1242fdf589dde7600783fc37d3dfbde

  • SHA512

    793302845e76e8cc03bd8281abad4db786f361e5c1a691462b40da11e8e7ac6210e0e9c21b41493dedffc6724af146ef70b9f8448d51dc860725364e14cba442

  • SSDEEP

    196608:tbVYKe7PjQhn5EQ9hNQAYzA5k6cTWDn7JKObS09Vp7j1oTeBI7lm:pzuA5EWheYkv8LlCTe2s

Malware Config

Extracted

Family

quasar

Attributes
  • reconnect_delay

    3000

Extracted

Family

quasar

Version

1.4.1

Botnet

romka

C2

jozzu420-51305.portmap.host:51305

Mutex

0445c342-b551-411c-9b80-cd437437f491

Attributes
  • encryption_key

    E1BF1D99459F04CAF668F054744BC2C514B0A3D6

  • install_name

    Romilyaa.exe

  • log_directory

    Logs

  • reconnect_delay

    3000

  • startup_key

    Windows 10 Boot

  • subdirectory

    SubDir

Targets

    • Target

      lol.exe

    • Size

      13.1MB

    • MD5

      621d4a616715d165ed2c10e48e5fd94b

    • SHA1

      7fabfdb5167e59d0442df460e1b236cb5bc75fbe

    • SHA256

      7975eec3959bed57e86fb6fa917503a7a1242fdf589dde7600783fc37d3dfbde

    • SHA512

      793302845e76e8cc03bd8281abad4db786f361e5c1a691462b40da11e8e7ac6210e0e9c21b41493dedffc6724af146ef70b9f8448d51dc860725364e14cba442

    • SSDEEP

      196608:tbVYKe7PjQhn5EQ9hNQAYzA5k6cTWDn7JKObS09Vp7j1oTeBI7lm:pzuA5EWheYkv8LlCTe2s

    • Detect Umbral payload

    • Modifies WinLogon for persistence

    • Modifies visibility of file extensions in Explorer

    • Modifies visiblity of hidden/system files in Explorer

    • Quasar RAT

      Quasar is an open source Remote Access Tool.

    • Quasar payload

    • 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.

    • Sets file execution options in registry

    • .NET Reactor proctector

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

    • Executes dropped EXE

    • Loads dropped DLL

    • Modifies file permissions

    • Reads user/profile data of web browsers

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

    • Registers COM server for autorun

    • 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 Enterprise v15

Tasks