General

  • Target

    5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8

  • Size

    3.0MB

  • Sample

    220524-wvax7sgehn

  • MD5

    6815c0366e22e0d8ac1fda13b44d7ac0

  • SHA1

    ef475f1100f6c0f64218ed62ae38ffae869206bf

  • SHA256

    5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8

  • SHA512

    e46e5e6e3856bb5af3fed83fcf78756b0b154fee4d5240eb39b7517c2ace45bbe5a74fc36365fd7ca310786f17c579715d958aee84a7ac4255f2b3b1f4135451

Malware Config

Extracted

Family

oski

C2

5.187.7.144

Targets

    • Target

      5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8

    • Size

      3.0MB

    • MD5

      6815c0366e22e0d8ac1fda13b44d7ac0

    • SHA1

      ef475f1100f6c0f64218ed62ae38ffae869206bf

    • SHA256

      5cf6b212b7032c8aa58d33d33c20f801f3709358ad70025ffa832abb69846fa8

    • SHA512

      e46e5e6e3856bb5af3fed83fcf78756b0b154fee4d5240eb39b7517c2ace45bbe5a74fc36365fd7ca310786f17c579715d958aee84a7ac4255f2b3b1f4135451

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

      suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer HTTP POST Pattern

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

    • Checks BIOS information in registry

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

    • Reads user/profile data of web browsers

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

    • Checks whether UAC is enabled

    • Suspicious use of NtSetInformationThreadHideFromDebugger

MITRE ATT&CK Enterprise v6

Tasks