General

  • Target

    84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.zip

  • Size

    160KB

  • Sample

    231119-zj7dtabd97

  • MD5

    54abfdfee2051fdc2f9746c18f72da61

  • SHA1

    c68199a93664434dd175432793ba5ef9c1509f21

  • SHA256

    5dc792bf16fa99e33e3270248f62bc7c5ae17c29c25347b59013ccbb8a5de7eb

  • SHA512

    1d9db79126978a7c0749d28f712287b00ed202bbbb0a36851208050f04639236efb07a8e7f996cf32e598c99bb228b2cacae8261973d0e851b494b916ceda5fd

  • SSDEEP

    3072:NTHFfEgUAMRDt0WyFcW0YFBIXZ9+W4bUr8y8xAnHaoJhUwkAVnBxSvjMWMnI:NTHTIDtTwjID+LwrOxAnHNJhmAVnHAV

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96.exe

    • Size

      247KB

    • MD5

      17f7e745dbc9477f5edbb4a02df91b06

    • SHA1

      896216645904844e1c012a4ce76234d0c6795f97

    • SHA256

      84e5c974047a59e9c250aa8e93a28b390267eea51a38a711bc28a229bf5eba96

    • SHA512

      b36ee1060d897d5b19e0e779ca48f9a7a336bcce2700c9c6c6eb549dfd9a49174262d39655079e0704a44749e280aefcb9813da4b7ce354b2105b74f374c2e9b

    • SSDEEP

      6144:h/1BvthPXgbdbpePeXYD4JFKtFF9duXI5:J1FLfOBsee44F9duXI

    • 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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v15

Tasks