General

  • Target

    Umbral1.exe

  • Size

    227KB

  • Sample

    240803-wdfgcszgql

  • MD5

    f6aeb1204375bc9a4ea0cfa7a1a76ba5

  • SHA1

    e659b3e54d32f44bf915d64c51bb512e58a7eeea

  • SHA256

    0ddc72fe91b271d21fbaafd017168c9b5370d362d7bd3e60928490ab4d1fac96

  • SHA512

    75ffba3ec1f5e05684ab0b99af42a518735324355745f0f9e3ba057627b746a948b86331e281db1bc2064f504af334118cb29807cb97b6579723e144d7acbd41

  • SSDEEP

    6144:+loZMLrIkd8g+EtXHkv/iD44VShOsTPkZFQu//OzCb8e1mJdi:ooZ0L+EP84VShOsTPkZFQu//O6B

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1268994498789118136/wdCgBN75mgZansODldWwpt19cwl4Du5oYshkYt-juoCAF_n-WC5lHOIdR6Ww9M9mxDJl

Targets

    • Target

      Umbral1.exe

    • Size

      227KB

    • MD5

      f6aeb1204375bc9a4ea0cfa7a1a76ba5

    • SHA1

      e659b3e54d32f44bf915d64c51bb512e58a7eeea

    • SHA256

      0ddc72fe91b271d21fbaafd017168c9b5370d362d7bd3e60928490ab4d1fac96

    • SHA512

      75ffba3ec1f5e05684ab0b99af42a518735324355745f0f9e3ba057627b746a948b86331e281db1bc2064f504af334118cb29807cb97b6579723e144d7acbd41

    • SSDEEP

      6144:+loZMLrIkd8g+EtXHkv/iD44VShOsTPkZFQu//OzCb8e1mJdi:ooZ0L+EP84VShOsTPkZFQu//O6B

    • Detect Umbral payload

    • Umbral

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

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

    • 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