Resubmissions

05-02-2023 21:57

230205-1vc5saed51 10

05-02-2023 21:11

230205-z1kw5sah46 10

General

  • Target

    file.exe

  • Size

    194KB

  • Sample

    230205-z1kw5sah46

  • MD5

    b27489879259e69aec42e7eb59aff03b

  • SHA1

    329cdb706429ca24159cda7696477da08e8b14fa

  • SHA256

    4b42c9c58ec2d2d5be9b1c5de974b333ececd98e01d0379cdacb25f838d1ee6d

  • SHA512

    f515a87b0632fdd3f48cfa0845574e6ed388ece7c03cf2c328c5d0ce51a5878777fd9724a527f5394ec1190109b32729a5145832d83a6d385cfd98b2850fae58

  • SSDEEP

    3072:QPPbOsVFt90vmLAhJWVC95o0KmL30bN241fliTpYT42G:EPbbJ9FLqJimLLsKYT4

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      194KB

    • MD5

      b27489879259e69aec42e7eb59aff03b

    • SHA1

      329cdb706429ca24159cda7696477da08e8b14fa

    • SHA256

      4b42c9c58ec2d2d5be9b1c5de974b333ececd98e01d0379cdacb25f838d1ee6d

    • SHA512

      f515a87b0632fdd3f48cfa0845574e6ed388ece7c03cf2c328c5d0ce51a5878777fd9724a527f5394ec1190109b32729a5145832d83a6d385cfd98b2850fae58

    • SSDEEP

      3072:QPPbOsVFt90vmLAhJWVC95o0KmL30bN241fliTpYT42G:EPbbJ9FLqJimLLsKYT4

    • 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