General

  • Target

    Umbral.exe

  • Size

    229KB

  • Sample

    240711-1zlbysycmc

  • MD5

    6e1ac269ea812669f7007ab3b279ff46

  • SHA1

    03ca8457e3ed82c50db62dddbe85e45118015704

  • SHA256

    d263275c72e75ae20efea5fd0f635335d7591ed2094c391f8b0747316a4182f4

  • SHA512

    925cc2227ad7840796371d387fe9252f3cdfc546aae45afbba07247440031c5154b687ea5c187705d279f47bece0b3aa41c6dffd5cdf52bbe90aacb9f13ac1a9

  • SSDEEP

    6144:9loZM+rIkd8g+EtXHkv/iD45xsWGsyVtGhTOMdRYTQb8e1mwi:foZtL+EP8TsWGsyVtGhTOMdRYs6

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1260651455786909778/-dPGeIcuHm3YkrMzqWQLZLA3EyEKrOIkTCKadCZMb0-Ls17KfNRsMG5MKoo7u8MNuPrI

Targets

    • Target

      Umbral.exe

    • Size

      229KB

    • MD5

      6e1ac269ea812669f7007ab3b279ff46

    • SHA1

      03ca8457e3ed82c50db62dddbe85e45118015704

    • SHA256

      d263275c72e75ae20efea5fd0f635335d7591ed2094c391f8b0747316a4182f4

    • SHA512

      925cc2227ad7840796371d387fe9252f3cdfc546aae45afbba07247440031c5154b687ea5c187705d279f47bece0b3aa41c6dffd5cdf52bbe90aacb9f13ac1a9

    • SSDEEP

      6144:9loZM+rIkd8g+EtXHkv/iD45xsWGsyVtGhTOMdRYTQb8e1mwi:foZtL+EP8TsWGsyVtGhTOMdRYs6

    • Detect Umbral payload

    • Umbral

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

    • 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

    • Deletes itself

    • 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