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General

  • Target

    file

  • Size

    293KB

  • Sample

    231012-25t2qagc64

  • MD5

    b4da9897cf577c55aa364a57ce6d6ab6

  • SHA1

    8d2c6b7c0496be939c94db11c1deed3761aa36b1

  • SHA256

    dc1bc9d08ef773a4d935b0051c240ef1b9f2ce8dcc000063ffdcab1ef6bd1d50

  • SHA512

    57e0754e00f7e70a21bf6c2a062fe7b76c422b530b62236455689540f2c1ffb22caac3e936cb4f6616db7558a9b2a81a70103d11449c7ac5bb70c9cb38887d02

  • SSDEEP

    3072:mlNvrtDJVoihS660sTdgmfJFXNQ25xSA2SXux02PiaJxas/aT:E5oihS660shgmfLN/50yXuL/a

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file

    • Size

      293KB

    • MD5

      b4da9897cf577c55aa364a57ce6d6ab6

    • SHA1

      8d2c6b7c0496be939c94db11c1deed3761aa36b1

    • SHA256

      dc1bc9d08ef773a4d935b0051c240ef1b9f2ce8dcc000063ffdcab1ef6bd1d50

    • SHA512

      57e0754e00f7e70a21bf6c2a062fe7b76c422b530b62236455689540f2c1ffb22caac3e936cb4f6616db7558a9b2a81a70103d11449c7ac5bb70c9cb38887d02

    • SSDEEP

      3072:mlNvrtDJVoihS660sTdgmfJFXNQ25xSA2SXux02PiaJxas/aT:E5oihS660shgmfLN/50yXuL/a

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    • Creates new service(s)

    • Modifies Windows Firewall

    • Sets service image path in registry

    • Checks computer location settings

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

    • Executes dropped EXE

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks