General

  • Target

    53946e3295382ddab25a9800e0faef99a6a11fbeec0c2411788315596c90d903

  • Size

    98KB

  • Sample

    240417-qtqpdahf86

  • MD5

    4623564b37c51b9fe7b06e69911fadea

  • SHA1

    7434c38cba0e68b50e846ae7d062eb7d90d763c5

  • SHA256

    53946e3295382ddab25a9800e0faef99a6a11fbeec0c2411788315596c90d903

  • SHA512

    1029be02ad9568cba43fd0ec9c6010cf792de62a0a5dac12ead1f0a868f576f31effead029583cf85234a457b6695b3c1f7cd45e2a17f376472c96b2850713a0

  • SSDEEP

    1536:F3oYoyyzam9wpC21hcSOWZSTYwbgJvfnieVJ23YpMeipkV4Eq5IiKTiU63yCIf:F3oyyMUQq+ZSTjQrhVV0OiKTiU63yCU

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd.exe

    • Size

      170KB

    • MD5

      f5fd4237e550503a8eab51ae35f147b6

    • SHA1

      869d44d58fb734b3692500dae1f42f0d6e3b3434

    • SHA256

      6fb0201dac82a2b6f3c409d74005eb50aab93abd7508f513636be051db86eefd

    • SHA512

      32327ca44e09d46ba8e656124f7480979b3eeb3769a94259d536a5223b2c532bd21654d8b4551d26265903f5c2be87a8da73d4571eee6fd9bfc887ea9e88350f

    • SSDEEP

      1536:Js5KSNeteSXSI4nZ7OyP8p7+C1xIhQ6M3dfUMJn325pDedDT50ZXXKVXRKX:e5ScSHCO1p7hiO4AI1edHK56lR

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

    • Windows security bypass

    • 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