General

  • Target

    75f8f5550a8422f1b3b5bffac0194314.bin

  • Size

    154KB

  • Sample

    231006-b4grwsge2v

  • MD5

    42e2f36e58e31aa39f46639e6eef303f

  • SHA1

    b4fb832a139db11da1b699920d6eae148faf9b2b

  • SHA256

    d1a226c6e635ec5e5424ae0dbbe6e1831a272e213985d811c85c1bc9582656c7

  • SHA512

    a37b3abf363f867d1cf9e4417890a538b3fbd90111218d6479cc8da2bbef5f3567496bfe107badd57521ce58cf7664c0d1521b30e534c3af9812c927203ee615

  • SSDEEP

    3072:K1SVaaW4ZCD5/Feubs4f6xFLh99Ii8X2aGwQj/Z/Qj56uHz:K4Vq/FW4SzFEB2DjRwBT

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      2862ceab031067e29a8c1b352d9655928866081f2401e6f20ca6be3700571713.exe

    • Size

      217KB

    • MD5

      75f8f5550a8422f1b3b5bffac0194314

    • SHA1

      e69a5158ec792c5a9515aa7bf72660cdb9ad6e54

    • SHA256

      2862ceab031067e29a8c1b352d9655928866081f2401e6f20ca6be3700571713

    • SHA512

      3e848495367f87d6d0f4c87aece52612aa983ce535ea8aea7a1e6303c0f92444b412047e8eefa60211aca27bfec110f5a24d222470b858a5203068b4d203c7e4

    • SSDEEP

      3072:ewXzCJfAAfa/tXLVP02T4RhOkx1KNIHgX5RG+t87hX9:7Opf2tXL8hOkAy+

    • 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