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General

  • Target

    file.exe

  • Size

    208KB

  • Sample

    231004-lkb3eaaf2z

  • MD5

    711979d0ba9c7d2404ab1f1ce2b2f659

  • SHA1

    d79bbfdc8819df8bde19d8421e5d431ece79d516

  • SHA256

    b0630ed90cf85b1628028e32adce8cfbdfdc2036dd82387bd053104480af3e18

  • SHA512

    9432eda4ecb4cdf24228b56d6e7955a833fc81e8af14e736a2a36492acd2ae0bdcfeb6c10191caa86c557d3401718873a1939569046a7968cf17aace35f9e702

  • SSDEEP

    3072:PX9oJTf5hxPsEiohwR8kW6eypJahlL2rdg7q59N4NOmS5oqft8Ih:PGf5DEDoh1kRPPahaZu4mqf

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      208KB

    • MD5

      711979d0ba9c7d2404ab1f1ce2b2f659

    • SHA1

      d79bbfdc8819df8bde19d8421e5d431ece79d516

    • SHA256

      b0630ed90cf85b1628028e32adce8cfbdfdc2036dd82387bd053104480af3e18

    • SHA512

      9432eda4ecb4cdf24228b56d6e7955a833fc81e8af14e736a2a36492acd2ae0bdcfeb6c10191caa86c557d3401718873a1939569046a7968cf17aace35f9e702

    • SSDEEP

      3072:PX9oJTf5hxPsEiohwR8kW6eypJahlL2rdg7q59N4NOmS5oqft8Ih:PGf5DEDoh1kRPPahaZu4mqf

    • Tofsee

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

    • Windows security bypass

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • XMRig Miner payload

    • 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.

    • Deletes itself

    • Executes dropped EXE

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks