General

  • Target

    nothingless.exe

  • Size

    62B

  • Sample

    231215-fq5n1saffp

  • MD5

    3f386f5061436a0338a64e0910db495d

  • SHA1

    599fe4a552c991a2b3ce5a1660732bf7b21fb901

  • SHA256

    0af3aae90b7de9fdceee2ab421378ea2f54c74be81ef43fc6c1790a032755d80

  • SHA512

    235479f42cbbe0a4b0100167fece0d14c9b47d272b3ba8322bcfe8539f055bf31d500e7b2995cc968ebf73034e039f59c5f0f9410428663034bf119d74b5672c

Malware Config

Targets

    • Target

      nothingless.exe

    • Size

      62B

    • MD5

      3f386f5061436a0338a64e0910db495d

    • SHA1

      599fe4a552c991a2b3ce5a1660732bf7b21fb901

    • SHA256

      0af3aae90b7de9fdceee2ab421378ea2f54c74be81ef43fc6c1790a032755d80

    • SHA512

      235479f42cbbe0a4b0100167fece0d14c9b47d272b3ba8322bcfe8539f055bf31d500e7b2995cc968ebf73034e039f59c5f0f9410428663034bf119d74b5672c

    • Detect Umbral payload

    • Detect Xworm Payload

    • Umbral

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

    • Xworm

      Xworm is a remote access trojan written in C#.

    • Blocklisted process makes network request

    • Downloads MZ/PE file

    • Sets file execution options in registry

    • Checks computer location settings

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

    • Drops startup file

    • Executes dropped EXE

    • Loads dropped DLL

    • Registers COM server for autorun

    • UPX packed file

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • 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

    • 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.

    • Checks system information in the registry

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

    • Suspicious use of NtCreateThreadExHideFromDebugger

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v15

Tasks