Overview

overview

10

Static

static

1

21b7b37864...0N.exe

windows7-x64

10

21b7b37864...0N.exe

windows10-2004-x64

10

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General

  • Target

    21b7b37864afd5d1781a566f8aafc390N.exe

  • Size

    3.1MB

  • Sample

    240801-3zwtssyarg

  • MD5

    21b7b37864afd5d1781a566f8aafc390

  • SHA1

    99e11b58458f94e10d835c17a77076fa5adc9654

  • SHA256

    3329ef336752b999469c5e2b3437432b20bd02b71e8a4f5f0a5609006e298a5f

  • SHA512

    4c080e125c6ec11d550a3f679f2f31e90b8bb691d716d339e032d6967966fdd79d99936fe69e83752808d7b442a8c36b431f235f1a53fa643ba7b4bc05a08e7a

  • SSDEEP

    49152:3wh6L+oabpsbpDeaUxVjjwYwdGhNjw+qazDlchix/7gnp2+Cn3fO9XQW2GV:X+oEOuT4YwqZwfhix/ELCm9XPXV

Score
10/10
umbralcredential_accessdiscoveryexecutionspywarestealer

Malware Config

Targets

    • Target

      21b7b37864afd5d1781a566f8aafc390N.exe

    • Size

      3.1MB

    • MD5

      21b7b37864afd5d1781a566f8aafc390

    • SHA1

      99e11b58458f94e10d835c17a77076fa5adc9654

    • SHA256

      3329ef336752b999469c5e2b3437432b20bd02b71e8a4f5f0a5609006e298a5f

    • SHA512

      4c080e125c6ec11d550a3f679f2f31e90b8bb691d716d339e032d6967966fdd79d99936fe69e83752808d7b442a8c36b431f235f1a53fa643ba7b4bc05a08e7a

    • SSDEEP

      49152:3wh6L+oabpsbpDeaUxVjjwYwdGhNjw+qazDlchix/7gnp2+Cn3fO9XQW2GV:X+oEOuT4YwqZwfhix/ELCm9XPXV

    Score
    10/10
    umbralcredential_accessdiscoveryexecutionspywarestealer

    • Detect Umbral payload

    • Umbral

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

      stealerumbral

    • Credentials from Password Stores: Credentials from Web Browsers

      Malicious Access or copy of Web Browser Credential store.

      credential_accessstealer

    • Command and Scripting Interpreter: PowerShell

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

      execution

    • Drops file in Drivers directory

    • Reads user/profile data of web browsers

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

      spywarestealer

    • 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.

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Enterprise v15

Tasks