General

  • Target

    file.exe

  • Size

    306KB

  • Sample

    230628-zcfbraba87

  • MD5

    944655b3865bcbb0d9dd0f90467094b9

  • SHA1

    50ea89599994771b3127450b61db53e98f08cfe3

  • SHA256

    b2f5d09c0f4f4ad390c939e6d2d4af2e1155362a409d20a784826ec0320afadb

  • SHA512

    27487cae02e5f4bbb69a288315bcda927378efd8d208764ebbd65dba50d3d949b3478d74e18519fdafe22fa2ebbb0ccf4fdff9263499100b50458fccc9418afa

  • SSDEEP

    3072:z8maj+qOCfqgT2o1YZtmapcpjl6L4vX5vj5P1oir:zijeCzT2CYZtmWvLu15

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      306KB

    • MD5

      944655b3865bcbb0d9dd0f90467094b9

    • SHA1

      50ea89599994771b3127450b61db53e98f08cfe3

    • SHA256

      b2f5d09c0f4f4ad390c939e6d2d4af2e1155362a409d20a784826ec0320afadb

    • SHA512

      27487cae02e5f4bbb69a288315bcda927378efd8d208764ebbd65dba50d3d949b3478d74e18519fdafe22fa2ebbb0ccf4fdff9263499100b50458fccc9418afa

    • SSDEEP

      3072:z8maj+qOCfqgT2o1YZtmapcpjl6L4vX5vj5P1oir:zijeCzT2CYZtmWvLu15

    • 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