Resubmissions

02-11-2024 20:47

241102-zk65faxqfq 10

02-11-2024 20:43

241102-zhqpnsvemg 10

General

  • Target

    GTAGLoader.exe

  • Size

    229KB

  • Sample

    241102-zk65faxqfq

  • MD5

    18cb3d1a221a079d9b499f2eec3a3e64

  • SHA1

    5fb17f7e655b5cb79be1099c8ea550ac1f5ace1f

  • SHA256

    e22bde6d04787794012e7e12ceaf1cf8fdf145f81551d90febf6a4f9c5d4e029

  • SHA512

    ca4fdb1e0bbf0d63667d5faa71f691efa4f1a629ca391665d0c361ce84876fc2fd0962b3a2c8bb8735e09931cc4401f912dece4e43f325fa8fe56b5c24630b03

  • SSDEEP

    6144:lloZM9rIkd8g+EtXHkv/iD4uNKIkqNlO+LWU1pAOqb8e1mSi:noZOL+EP8uNKIkqNlO+LWU1pAxQ

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1302369349960597544/nRF42pkmRbq0sIVg4AoYuJ8KE5OmNwC1-6AS8FiBKHtRDj4bXpn_q6WSjWZJIRfF3Mbf

Targets

    • Target

      GTAGLoader.exe

    • Size

      229KB

    • MD5

      18cb3d1a221a079d9b499f2eec3a3e64

    • SHA1

      5fb17f7e655b5cb79be1099c8ea550ac1f5ace1f

    • SHA256

      e22bde6d04787794012e7e12ceaf1cf8fdf145f81551d90febf6a4f9c5d4e029

    • SHA512

      ca4fdb1e0bbf0d63667d5faa71f691efa4f1a629ca391665d0c361ce84876fc2fd0962b3a2c8bb8735e09931cc4401f912dece4e43f325fa8fe56b5c24630b03

    • SSDEEP

      6144:lloZM9rIkd8g+EtXHkv/iD4uNKIkqNlO+LWU1pAOqb8e1mSi:noZOL+EP8uNKIkqNlO+LWU1pAxQ

    • Detect Umbral payload

    • Umbral

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

    • Umbral family

    • Command and Scripting Interpreter: PowerShell

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

    • Drops file in Drivers directory

    • Reads user/profile data of web browsers

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

    • Legitimate hosting services abused for malware hosting/C2

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

MITRE ATT&CK Enterprise v15

Tasks