General

  • Target

    352f91e0ea977a70741e8c9dc6bd391aa99e91d86d91920fa4ebe4608b76d6a0

  • Size

    230KB

  • Sample

    221227-ewdxtaec45

  • MD5

    c131e4131922ac7146480fa219a4dc89

  • SHA1

    890120aab795b127032bc04f92350d43ef3bf107

  • SHA256

    352f91e0ea977a70741e8c9dc6bd391aa99e91d86d91920fa4ebe4608b76d6a0

  • SHA512

    c29555cd6ab3949f14ed8d3928bdf98e2abf13fa93917f5f4d0cbdc9be19f3ad8edd26ff9e309d3fb36029760a2b1fe1f8794e98867604a41eccd7355975b0aa

  • SSDEEP

    3072:rJTxML085/KXKNPAWhF+YTed9zSMWPtYKs/xAI9h:AL0CKELhYYK7W1YDZ

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      352f91e0ea977a70741e8c9dc6bd391aa99e91d86d91920fa4ebe4608b76d6a0

    • Size

      230KB

    • MD5

      c131e4131922ac7146480fa219a4dc89

    • SHA1

      890120aab795b127032bc04f92350d43ef3bf107

    • SHA256

      352f91e0ea977a70741e8c9dc6bd391aa99e91d86d91920fa4ebe4608b76d6a0

    • SHA512

      c29555cd6ab3949f14ed8d3928bdf98e2abf13fa93917f5f4d0cbdc9be19f3ad8edd26ff9e309d3fb36029760a2b1fe1f8794e98867604a41eccd7355975b0aa

    • SSDEEP

      3072:rJTxML085/KXKNPAWhF+YTed9zSMWPtYKs/xAI9h:AL0CKELhYYK7W1YDZ

    • Tofsee

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

    • xmrig

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

    • XMRig Miner payload

    • Creates new service(s)

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Sets service image path in registry

    • Checks computer location settings

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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks