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General

  • Target

    528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc

  • Size

    213KB

  • Sample

    221218-bgwyasdb7v

  • MD5

    1051fb8c6a83417c3df1e4b1c55de0ba

  • SHA1

    514d06b69d4a73a71cf93b68eb3f7b9b2edfb4af

  • SHA256

    528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc

  • SHA512

    2cfddbdd28809d9a04a59fca3bf3d41ca11ff806c87dad0e0f8b3eb396350b6f11da1e3dd520fe682347af6cf66362e4f8b5c4249ac25a6ec9b321d240358987

  • SSDEEP

    3072:WtDYkcVDLfqZwR5MJHt6oS6RuA1bP39DD1SH58/g3xo2koSG3ERWR3LV:wUkMDLfqbHLP33g3C4U0VB

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc

    • Size

      213KB

    • MD5

      1051fb8c6a83417c3df1e4b1c55de0ba

    • SHA1

      514d06b69d4a73a71cf93b68eb3f7b9b2edfb4af

    • SHA256

      528b41a1109add7cca54e64f61a5e91e304f1dfd357e4db27a7b04c350d645bc

    • SHA512

      2cfddbdd28809d9a04a59fca3bf3d41ca11ff806c87dad0e0f8b3eb396350b6f11da1e3dd520fe682347af6cf66362e4f8b5c4249ac25a6ec9b321d240358987

    • SSDEEP

      3072:WtDYkcVDLfqZwR5MJHt6oS6RuA1bP39DD1SH58/g3xo2koSG3ERWR3LV:wUkMDLfqbHLP33g3C4U0VB

    • 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.

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

MITRE ATT&CK Enterprise v6

Tasks