General

  • Target

    LisectAVT_2403002A_368.exe

  • Size

    3.3MB

  • Sample

    240725-aqngvawfjp

  • MD5

    db8da2d409c3dc46afe0dd3454388f9c

  • SHA1

    baa1e8196412a06919e37d888651916aae021b69

  • SHA256

    4ce4afc5fd856ed5951e35c3efd45fdc03662abf43050fddc564023ef40e6823

  • SHA512

    016d678636fafc456e146802da7b5d1b8be3f0b474e335158d65c1df4ae8bb241af43fdd278e99f6d50c6610f0fc775c48621b5d45c5841b904a7e1a971edfc0

  • SSDEEP

    98304:oZ1HRsp8NbXaaIptoNMrF4NOgmwCof84h:oZVIaIpeOrmNOTwCol

Malware Config

Extracted

Family

umbral

C2

https://discord.com/api/webhooks/1219193245557325834/Pny7ckgnLuo9kv28SEntCevPyhBWlY4AfJu4MogOozH9-s-mNnQ7UZJcF1RdHsmmAwgC

Targets

    • Target

      LisectAVT_2403002A_368.exe

    • Size

      3.3MB

    • MD5

      db8da2d409c3dc46afe0dd3454388f9c

    • SHA1

      baa1e8196412a06919e37d888651916aae021b69

    • SHA256

      4ce4afc5fd856ed5951e35c3efd45fdc03662abf43050fddc564023ef40e6823

    • SHA512

      016d678636fafc456e146802da7b5d1b8be3f0b474e335158d65c1df4ae8bb241af43fdd278e99f6d50c6610f0fc775c48621b5d45c5841b904a7e1a971edfc0

    • SSDEEP

      98304:oZ1HRsp8NbXaaIptoNMrF4NOgmwCof84h:oZVIaIpeOrmNOTwCol

    • DcRat

      DarkCrystal(DC) is a new .NET RAT active since June 2019 capable of loading additional plugins.

    • Detect Umbral payload

    • Process spawned unexpected child process

      This typically indicates the parent process was compromised via an exploit or macro.

    • UAC bypass

    • 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.

    • DCRat payload

      Detects payload of DCRat, commonly dropped by NSIS installers.

    • 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

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Executes dropped EXE

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Checks whether UAC is enabled

    • 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