General

  • Target

    b5uEJHZB6Rl.exe

  • Size

    231KB

  • Sample

    240812-b7w1zstfmh

  • MD5

    438289fb9c72ed39bf5497f9af21ec7a

  • SHA1

    8120391ecb41ed6a4c6ef0b259776e59311d6997

  • SHA256

    ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

  • SHA512

    3647907fa2d503a242ef07cb20b081444b75e0c618a91232c8e77903b4b6aa823b8a7cbe07a45e02591fe48fdd23b5eae88565006b85863c0a5f6e42d7589fe0

  • SSDEEP

    6144:YloZM+rIkd8g+EtXHkv/iD4Bs4DdLocD/abtIEx6tb8e1mTiu:GoZtL+EP8Bs4DdLocD/abtIExq1

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1225264880039235738/46bNxRt60w9YjuGcjqkvDLT2Saa0gXhoe7P2-CbuUHwdxfwONEkNG92CHxRK6S67a3Bd

Targets

    • Target

      b5uEJHZB6Rl.exe

    • Size

      231KB

    • MD5

      438289fb9c72ed39bf5497f9af21ec7a

    • SHA1

      8120391ecb41ed6a4c6ef0b259776e59311d6997

    • SHA256

      ea4cb7c7b4cfb2fcc04d1c3f96b20c26638e69a97b15cae14659f0d6afb78f85

    • SHA512

      3647907fa2d503a242ef07cb20b081444b75e0c618a91232c8e77903b4b6aa823b8a7cbe07a45e02591fe48fdd23b5eae88565006b85863c0a5f6e42d7589fe0

    • SSDEEP

      6144:YloZM+rIkd8g+EtXHkv/iD4Bs4DdLocD/abtIEx6tb8e1mTiu:GoZtL+EP8Bs4DdLocD/abtIExq1

    • 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

      Using powershell.exe command.

    • 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