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General

  • Target

    01e1fb0a4795ce793f9cc3d6ccac091ad593589c877529f7e0a269d908db945e.zip

  • Size

    130KB

  • Sample

    230308-njf13sga45

  • MD5

    4d17cf0ae2b14634e8697369207fbe99

  • SHA1

    84baaacc4f5e60baf0f2a2b3d271041a718b6ac0

  • SHA256

    ef9a3eef71107456063f897e3d7319ac8f6ac8b1191840a08922362eba950241

  • SHA512

    92712bd6fbcf2422ab06324b8d037c9f0d0a36315b665279c25bb4e13b696dfd888fa06b5d4bc38cec5bbd5c24a9454cbb2dc13309d3cade755e9344f888ccb8

  • SSDEEP

    3072:zZKllxDrfAQXXZgz8FrYYA72uVk6bg59yu6oRExg+7JytT:MDLZnazRDS6b46oUL7JO

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      01e1fb0a4795ce793f9cc3d6ccac091ad593589c877529f7e0a269d908db945e.exe

    • Size

      195KB

    • MD5

      e6633af95778725d06d9adc558c55040

    • SHA1

      3020a3b73ca13402a9bf25ffadd8fe85fa091148

    • SHA256

      01e1fb0a4795ce793f9cc3d6ccac091ad593589c877529f7e0a269d908db945e

    • SHA512

      55efc150e23b178ea53f4c3fe24ea4162c56037ad0b03a5817ec2d64401fd0d21fa07717f88abb7f96337f768fed55d3b5c54ccf8eb40002561ea47d9244af12

    • SSDEEP

      3072:gUHMJ/RMC7brSsy0ELqqWq54W22KjCp1dsLXDOQbVYC2:gEM1RD7b2sy0nnqwbjAeLXrbV2

    • 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