General

  • Target

    file

  • Size

    268KB

  • Sample

    230516-nn49gaae64

  • MD5

    9b30c442d1e5f79e00beb59519f49bf1

  • SHA1

    e3f97e75276ba3b4756275bc1796396369b07b68

  • SHA256

    c30132d930b44ed9f7cbb78be47c9c3fb0bd0d34c3e0548304802c7c617cd185

  • SHA512

    931b892d036c75da6b8a7aeeb282e21d7715c52a2ab3a5636e38ddffadcb9be1261a26c7ae4407964d29c7caac526ec963fcc75cb3b76bf21ff3fb41b3dee931

  • SSDEEP

    3072:JoB1eK1AKuLq7ITFIiAq4pe5/kdg82Pd+YzF+UFOFQh91ESuPjco5E5WqFmcJObK:GB1IKuLiITpAqHFo0+oOFO7BI5qFBSw

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file

    • Size

      268KB

    • MD5

      9b30c442d1e5f79e00beb59519f49bf1

    • SHA1

      e3f97e75276ba3b4756275bc1796396369b07b68

    • SHA256

      c30132d930b44ed9f7cbb78be47c9c3fb0bd0d34c3e0548304802c7c617cd185

    • SHA512

      931b892d036c75da6b8a7aeeb282e21d7715c52a2ab3a5636e38ddffadcb9be1261a26c7ae4407964d29c7caac526ec963fcc75cb3b76bf21ff3fb41b3dee931

    • SSDEEP

      3072:JoB1eK1AKuLq7ITFIiAq4pe5/kdg82Pd+YzF+UFOFQh91ESuPjco5E5WqFmcJObK:GB1IKuLiITpAqHFo0+oOFO7BI5qFBSw

    • Tofsee

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

    • Windows security bypass

    • xmrig

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

    • XMRig Miner payload

    • 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 Matrix ATT&CK v6

Persistence

New Service

1
T1050

Modify Existing Service

1
T1031

Registry Run Keys / Startup Folder

1
T1060

Privilege Escalation

New Service

1
T1050

Defense Evasion

Disabling Security Tools

1
T1089

Modify Registry

2
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Tasks