General

  • Target

    file

  • Size

    303KB

  • Sample

    230501-s5c9jaae27

  • MD5

    531df55984e2b66ad9f0dbd639de601e

  • SHA1

    dc9d0df60d45c19e668e99a39946d1d39a5d9a09

  • SHA256

    e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f

  • SHA512

    1a2029171755e8c7f4f374af5544eef317a0d1635272991b7535f4406a99b4ef5d70985602fd85c8b9eb40de2215c81be496157821f78a013cea74ad2848e72b

  • SSDEEP

    3072:MuFL7HO/Wc2L/rIUpqfM/FqdAt/XOM5TJDTnmhd+:xFL7HQ2LrI7fg2AtXJnmv+

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file

    • Size

      303KB

    • MD5

      531df55984e2b66ad9f0dbd639de601e

    • SHA1

      dc9d0df60d45c19e668e99a39946d1d39a5d9a09

    • SHA256

      e3ffa663eeaa0eeda2b5cb06d094cb847f6520df57385c5d7fe5e49d01c99c8f

    • SHA512

      1a2029171755e8c7f4f374af5544eef317a0d1635272991b7535f4406a99b4ef5d70985602fd85c8b9eb40de2215c81be496157821f78a013cea74ad2848e72b

    • SSDEEP

      3072:MuFL7HO/Wc2L/rIUpqfM/FqdAt/XOM5TJDTnmhd+:xFL7HQ2LrI7fg2AtXJnmv+

    • 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 v6

Tasks