General

  • Target

    6ae3b362c05a0d47368dbe6e8512c01f.exe

  • Size

    632KB

  • Sample

    220523-hw3sqacad8

  • MD5

    6ae3b362c05a0d47368dbe6e8512c01f

  • SHA1

    df946045c50b64ec46c5964d3f3fe53dc17a3832

  • SHA256

    85b04366a901afa7df0d75f192032dccaee58e83827d7bd71674e202043d4f90

  • SHA512

    8b0179abde7cfedcec04f7c80394b44afd74f4b0aed4ca05268ca53fe166ef26f1ddeecc9ee96cfc500ae09fb482f8a9bbff85d855cccd8b9022ff696434ab7f

Malware Config

Extracted

Family

oski

C2

tvscreen.co.vu

Targets

    • Target

      6ae3b362c05a0d47368dbe6e8512c01f.exe

    • Size

      632KB

    • MD5

      6ae3b362c05a0d47368dbe6e8512c01f

    • SHA1

      df946045c50b64ec46c5964d3f3fe53dc17a3832

    • SHA256

      85b04366a901afa7df0d75f192032dccaee58e83827d7bd71674e202043d4f90

    • SHA512

      8b0179abde7cfedcec04f7c80394b44afd74f4b0aed4ca05268ca53fe166ef26f1ddeecc9ee96cfc500ae09fb482f8a9bbff85d855cccd8b9022ff696434ab7f

    • Oski

      Oski is an infostealer targeting browser data, crypto wallets.

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

      suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt)

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2

      suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (Passwords.txt) M2

    • suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (passwords.txt) M2

      suricata: ET MALWARE Suspicious Zipped Filename in Outbound POST Request (passwords.txt) M2

    • suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

      suricata: ET MALWARE Vidar/Arkei/Megumin/Oski Stealer Data Exfil

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

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

    • Downloads MZ/PE file

    • Checks computer location settings

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

    • Deletes itself

    • Loads dropped DLL

    • Reads user/profile data of web browsers

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Checks installed software on the system

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

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks