General

  • Target

    fc7bed6a4223ff0dc9a3747deedd5f27185494705181f58d750767b405607b98

  • Size

    177KB

  • Sample

    220604-kewzysbdan

  • MD5

    1eadea085d45526a7084ce29d71c0630

  • SHA1

    83697f995d7b4e5d1fdd5f6a5140075d77df9327

  • SHA256

    fc7bed6a4223ff0dc9a3747deedd5f27185494705181f58d750767b405607b98

  • SHA512

    d0e7f96819b195919c99dbd1913da222818ee3f090b2d1e43972dea0cd8992a8aa4873cf82aa432c8580515cbda64bc8e457385b49809841881c874480aeeb3b

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      fc7bed6a4223ff0dc9a3747deedd5f27185494705181f58d750767b405607b98

    • Size

      177KB

    • MD5

      1eadea085d45526a7084ce29d71c0630

    • SHA1

      83697f995d7b4e5d1fdd5f6a5140075d77df9327

    • SHA256

      fc7bed6a4223ff0dc9a3747deedd5f27185494705181f58d750767b405607b98

    • SHA512

      d0e7f96819b195919c99dbd1913da222818ee3f090b2d1e43972dea0cd8992a8aa4873cf82aa432c8580515cbda64bc8e457385b49809841881c874480aeeb3b

    • 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

    • 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