General

  • Target

    file.exe

  • Size

    275KB

  • Sample

    230413-wwfj3see6z

  • MD5

    5ba507f12eb9410bc6b6e6f6405fad9c

  • SHA1

    05a44ad00b12db2758dec40cd287e541988c9493

  • SHA256

    8c1ed5f19fc64f6ddce49308b51d2e5ad445145558c4a67954ba4ea617c134f0

  • SHA512

    989bbc1c9f61dee17e35cc5d16bba667a54d1b974ed45c517575102a635edf967fe1ca4c4581eae9b42a88d11cf5eb9fd073a1a2bd782afe8891e0d3124a1e5d

  • SSDEEP

    3072:KB7tgGIXoBno64T/giFbDrQxoKI1R9JPnC50vBJ0nPr:Eg0o6AdDGor1/xrvBAr

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      275KB

    • MD5

      5ba507f12eb9410bc6b6e6f6405fad9c

    • SHA1

      05a44ad00b12db2758dec40cd287e541988c9493

    • SHA256

      8c1ed5f19fc64f6ddce49308b51d2e5ad445145558c4a67954ba4ea617c134f0

    • SHA512

      989bbc1c9f61dee17e35cc5d16bba667a54d1b974ed45c517575102a635edf967fe1ca4c4581eae9b42a88d11cf5eb9fd073a1a2bd782afe8891e0d3124a1e5d

    • SSDEEP

      3072:KB7tgGIXoBno64T/giFbDrQxoKI1R9JPnC50vBJ0nPr:Eg0o6AdDGor1/xrvBAr

    • 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