General

  • Target

    1299da7bd846030ce6310b1bb2b3f7d34e297fbff08b5888532b9defb221bd14

  • Size

    180KB

  • Sample

    220604-mkyf3sbgd2

  • MD5

    23456d51bba1cf148ae1f7e9ffcd4ec3

  • SHA1

    9dc4abccb1b3892c2e2c824072b07659771c1fd2

  • SHA256

    1299da7bd846030ce6310b1bb2b3f7d34e297fbff08b5888532b9defb221bd14

  • SHA512

    666cb991137ce2c18220efbbe18767e174a3694ff1712de4d00cf147cb90fbdfce4b03444f10d359d695a457408615dcc09cd7cc812672b30ea86b54f6461d38

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      1299da7bd846030ce6310b1bb2b3f7d34e297fbff08b5888532b9defb221bd14

    • Size

      180KB

    • MD5

      23456d51bba1cf148ae1f7e9ffcd4ec3

    • SHA1

      9dc4abccb1b3892c2e2c824072b07659771c1fd2

    • SHA256

      1299da7bd846030ce6310b1bb2b3f7d34e297fbff08b5888532b9defb221bd14

    • SHA512

      666cb991137ce2c18220efbbe18767e174a3694ff1712de4d00cf147cb90fbdfce4b03444f10d359d695a457408615dcc09cd7cc812672b30ea86b54f6461d38

    • Tofsee

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

    • suricata: ET MALWARE Single char EXE direct download likely trojan (multiple families)

      suricata: ET MALWARE Single char EXE direct download likely trojan (multiple families)

    • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

      suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    • xmrig

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

    • XMRig Miner Payload

    • Creates new service(s)

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Sets service image path in registry

    • VMProtect packed file

      Detects executables packed with VMProtect commercial packer.

    • Checks computer location settings

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

    • Accesses cryptocurrency files/wallets, possible credential harvesting

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks