General

  • Target

    1df5c1a5b3e7724fe0db734fc8ad007f7f346cb02765050c05820d127df94b86exe_JC.exe

  • Size

    272KB

  • Sample

    231012-193nzsfc25

  • MD5

    7fa546aba2dbd4ed160339246ab8b6be

  • SHA1

    d4fa5e14b9b0284e8837a77d62c91d6aba5c2eab

  • SHA256

    1df5c1a5b3e7724fe0db734fc8ad007f7f346cb02765050c05820d127df94b86

  • SHA512

    b649fd529ceb802898091a04a82c562a63364a6848b350ea7bf2da364606e127726ed9ca83dba92e77bd6812a1fe48a0224ae96d67da4a881f549995a95ecf32

  • SSDEEP

    3072:jbabgQYvylv4QPQXx4CnO1cIILEG5Og+gvaDThIR7vcryIMzJ4Nw:PaMvylv4QPQXeCvII1ldvaRItJV

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      1df5c1a5b3e7724fe0db734fc8ad007f7f346cb02765050c05820d127df94b86exe_JC.exe

    • Size

      272KB

    • MD5

      7fa546aba2dbd4ed160339246ab8b6be

    • SHA1

      d4fa5e14b9b0284e8837a77d62c91d6aba5c2eab

    • SHA256

      1df5c1a5b3e7724fe0db734fc8ad007f7f346cb02765050c05820d127df94b86

    • SHA512

      b649fd529ceb802898091a04a82c562a63364a6848b350ea7bf2da364606e127726ed9ca83dba92e77bd6812a1fe48a0224ae96d67da4a881f549995a95ecf32

    • SSDEEP

      3072:jbabgQYvylv4QPQXx4CnO1cIILEG5Og+gvaDThIR7vcryIMzJ4Nw:PaMvylv4QPQXeCvII1ldvaRItJV

    • 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