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General

  • Target

    file.exe

  • Size

    147KB

  • Sample

    221127-ym4lnaea92

  • MD5

    47ce9ed9195c4e612073ae5e1672e5b4

  • SHA1

    59ce202ca406b8231beb7e21d93ef273723a66e0

  • SHA256

    365774579036398a227dd43ab69bfb57221aa97700cd37e0bc7bd764420db839

  • SHA512

    785bb50a883500b0dcbd11e59b6bcafa30a737c50b7dccc3502a29f4fb107fab98d954b51e123112b9692e4f8d9d300f5f81c1275389b9223acb22f149018e16

  • SSDEEP

    3072:K+LFVOQgneprGk53rCVioI4owCnK1lDGD4x+99:LFVonkr/rgioI4owCn+IDD

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      147KB

    • MD5

      47ce9ed9195c4e612073ae5e1672e5b4

    • SHA1

      59ce202ca406b8231beb7e21d93ef273723a66e0

    • SHA256

      365774579036398a227dd43ab69bfb57221aa97700cd37e0bc7bd764420db839

    • SHA512

      785bb50a883500b0dcbd11e59b6bcafa30a737c50b7dccc3502a29f4fb107fab98d954b51e123112b9692e4f8d9d300f5f81c1275389b9223acb22f149018e16

    • SSDEEP

      3072:K+LFVOQgneprGk53rCVioI4owCnK1lDGD4x+99:LFVonkr/rgioI4owCn+IDD

    • Tofsee

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

    • xmrig

      XMRig is a high performance, open source, cross platform CPU/GPU miner.

    • XMRig Miner payload

    • Creates new service(s)

    • Executes dropped EXE

    • 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

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks