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General

  • Target

    file.exe

  • Size

    1.4MB

  • Sample

    231103-nye3bsca25

  • MD5

    d3bcc11e32d75fec333d1857c4e0a3da

  • SHA1

    bea8ba8c44766d446e264bb6d25c9f9b5158ff78

  • SHA256

    57dd76c7c512afbed21d7304a66fffd89cd904c39a47d459a49aec1f5f1d5235

  • SHA512

    300b305602265e84dab3bf2941a35a409bafb263e955397ac41ff29f01b5e9ee17b0907db39b374f8e8973c3e2200b0b9b34c2074f11e2c5a67099f429b6c73d

  • SSDEEP

    24576:nbm+AIHqd5yIfvDkTlAKot2+c3t7JVpfjfWZnHbyBrN1Rd9rmRve2GViRXUmFX:bm+Aoqd5yMvDkTlAKoty3t7/Fjs+BrvK

Malware Config

Extracted

Family

smokeloader

Botnet

pub1

Extracted

Family

smokeloader

Version

2020

C2

http://host-file-host6.com/

http://host-host-file8.com/

rc4.i32
rc4.i32

Targets

    • Target

      file.exe

    • Size

      1.4MB

    • MD5

      d3bcc11e32d75fec333d1857c4e0a3da

    • SHA1

      bea8ba8c44766d446e264bb6d25c9f9b5158ff78

    • SHA256

      57dd76c7c512afbed21d7304a66fffd89cd904c39a47d459a49aec1f5f1d5235

    • SHA512

      300b305602265e84dab3bf2941a35a409bafb263e955397ac41ff29f01b5e9ee17b0907db39b374f8e8973c3e2200b0b9b34c2074f11e2c5a67099f429b6c73d

    • SSDEEP

      24576:nbm+AIHqd5yIfvDkTlAKot2+c3t7JVpfjfWZnHbyBrN1Rd9rmRve2GViRXUmFX:bm+Aoqd5yMvDkTlAKoty3t7/Fjs+BrvK

    • DcRat

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

    • Glupteba

      Glupteba is a modular loader written in Golang with various components.

    • Glupteba payload

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • UAC bypass

    • Windows security bypass

    • Downloads MZ/PE file

    • Modifies Windows Firewall

    • Checks BIOS information in registry

      BIOS information is often read in order to detect sandboxing environments.

    • Checks computer location settings

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

    • Drops startup file

    • 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.

    • Registers COM server for autorun

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • Windows security modification

    • Adds Run key to start application

    • Checks installed software on the system

      Looks up Uninstall key entries in the registry to enumerate software on the system.

    • Checks whether UAC is enabled

    • Enumerates connected drives

      Attempts to read the root path of hard drives other than the default C: drive.

    • Legitimate hosting services abused for malware hosting/C2

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks