Resubmissions

22/11/2023, 17:00

231122-vh5rdadg54 10

21/11/2023, 22:51

231121-2s5mpahg6y 10

General

  • Target

    allnewumm.exe

  • Size

    14.8MB

  • Sample

    231122-vh5rdadg54

  • MD5

    b1d5ab180b539da823cf40c7638d0286

  • SHA1

    6713943614743cf7cbf255fb6cef4aa20c1bf4ed

  • SHA256

    fae531687cc458d8d7e504b81776514eec3cd9700891a1b873afa3748c84cc78

  • SHA512

    1ce698c9cddf36974bbc38ea0ef707bfd02d4a4199bde23e5324b7982f95b0c40b773b360e1b005df6b67a66261fabc84923f2ed0381d790c8d19fa9eec17f79

  • SSDEEP

    393216:Lexbl6e6TvVmR/i+W7n/+8HVi5vcPF07zvrRl:LexZpkmRa+W7n/p1i5KF0PrR

Malware Config

Extracted

Family

smokeloader

Botnet

up3

Extracted

Family

smokeloader

Version

2020

C2

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

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

rc4.i32
rc4.i32

Targets

    • Target

      allnewumm.exe

    • Size

      14.8MB

    • MD5

      b1d5ab180b539da823cf40c7638d0286

    • SHA1

      6713943614743cf7cbf255fb6cef4aa20c1bf4ed

    • SHA256

      fae531687cc458d8d7e504b81776514eec3cd9700891a1b873afa3748c84cc78

    • SHA512

      1ce698c9cddf36974bbc38ea0ef707bfd02d4a4199bde23e5324b7982f95b0c40b773b360e1b005df6b67a66261fabc84923f2ed0381d790c8d19fa9eec17f79

    • SSDEEP

      393216:Lexbl6e6TvVmR/i+W7n/+8HVi5vcPF07zvrRl:LexZpkmRa+W7n/p1i5KF0PrR

    • 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

    • PrivateLoader

      PrivateLoader is a downloader sold as a pay-per-install malware distribution service.

    • SmokeLoader

      Modular backdoor trojan in use since 2014.

    • Suspicious use of NtCreateUserProcessOtherParentProcess

    • UAC bypass

    • Windows security bypass

    • Detected executables Discord URL observed in first stage droppers

      DISCORD URLS.

    • Identifies VirtualBox via ACPI registry values (likely anti-VM)

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Drops file in Drivers directory

    • Modifies Windows Firewall

    • Stops running service(s)

    • 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 data files stored by FTP clients

      Tries to access configuration files associated with programs like FileZilla.

    • Reads user/profile data of web browsers

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

    • Themida packer

      Detects Themida, an advanced Windows software protection system.

    • 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

    • Creates a large amount of network flows

      This may indicate a network scan to discover remotely running services.

    • Drops Chrome extension

    • Drops desktop.ini file(s)

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Manipulates WinMonFS driver.

      Roottkits write to WinMonFS to hide directories/files from being detected.

    • Drops file in System32 directory

    • Suspicious use of NtSetInformationThreadHideFromDebugger

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks