General

  • Target

    file

  • Size

    265KB

  • Sample

    231012-vrvyjaff66

  • MD5

    d8e2d4ee9ea649e6c59ed61bf899400e

  • SHA1

    b9a5245c0001c8fea8da2e716120a5cc93b10e6a

  • SHA256

    c78fdf1284c80f1d2822e9f53f85c116e080871086bae22c632f9e6a3786e4a5

  • SHA512

    999f99378b3a277ca6bf54f4211862b519104aaf729de8d8dad692c1a9d48561b25ce5782d970c1bf10ce814ee7787ed5a116d019b3470b74a7b2110015f1485

  • SSDEEP

    3072:QBNZOh4l8XCkzBQhqJQVjBFgbZzxQqhlO6DMNWTsUS1n:4ih4l8XCk1R0XgbZznoYMUX

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file

    • Size

      265KB

    • MD5

      d8e2d4ee9ea649e6c59ed61bf899400e

    • SHA1

      b9a5245c0001c8fea8da2e716120a5cc93b10e6a

    • SHA256

      c78fdf1284c80f1d2822e9f53f85c116e080871086bae22c632f9e6a3786e4a5

    • SHA512

      999f99378b3a277ca6bf54f4211862b519104aaf729de8d8dad692c1a9d48561b25ce5782d970c1bf10ce814ee7787ed5a116d019b3470b74a7b2110015f1485

    • SSDEEP

      3072:QBNZOh4l8XCkzBQhqJQVjBFgbZzxQqhlO6DMNWTsUS1n:4ih4l8XCk1R0XgbZznoYMUX

    • 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