General

  • Target

    0bd45444e6844355a7792eeedd413e352092e14a76c97b4bfb775377f90227f5

  • Size

    180KB

  • Sample

    220604-tfza5seah4

  • MD5

    d43fbaf581ad40924fc3f931a84c9bf0

  • SHA1

    60d3e8efa40d45c865b46180ad9105fbe052230d

  • SHA256

    0bd45444e6844355a7792eeedd413e352092e14a76c97b4bfb775377f90227f5

  • SHA512

    23f7f0c738c60dab1a3996ecec708ec798f88a9cd91f6d65f0358fcae7ecbaa4c072905ae18b745de232a0bcf799c548723ce3597e6babd7d5b851a964db5acf

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      0bd45444e6844355a7792eeedd413e352092e14a76c97b4bfb775377f90227f5

    • Size

      180KB

    • MD5

      d43fbaf581ad40924fc3f931a84c9bf0

    • SHA1

      60d3e8efa40d45c865b46180ad9105fbe052230d

    • SHA256

      0bd45444e6844355a7792eeedd413e352092e14a76c97b4bfb775377f90227f5

    • SHA512

      23f7f0c738c60dab1a3996ecec708ec798f88a9cd91f6d65f0358fcae7ecbaa4c072905ae18b745de232a0bcf799c548723ce3597e6babd7d5b851a964db5acf

    • Tofsee

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

    • suricata: ET MALWARE Single char EXE direct download likely trojan (multiple families)

      suricata: ET MALWARE Single char EXE direct download likely trojan (multiple families)

    • suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

      suricata: ET MALWARE Terse alphanumeric executable downloader high likelihood of being hostile

    • xmrig

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

    • XMRig Miner Payload

    • Creates new service(s)

    • Downloads MZ/PE file

    • Executes dropped EXE

    • Modifies Windows Firewall

    • Sets service image path in registry

    • UPX packed file

      Detects executables packed with UPX/modified UPX open source packer.

    • VMProtect packed file

      Detects executables packed with VMProtect commercial packer.

    • 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