General

  • Target

    file

  • Size

    263KB

  • Sample

    230603-rek11sgh82

  • MD5

    efbeb9e59d12e56e8025fb3f13484820

  • SHA1

    84de3934d54cdee52c5e7f15a7043cf549565867

  • SHA256

    f6d40c99bbde7b24d679bde627fb92bd5f695922f8dbdacc567d20fc3e990619

  • SHA512

    9faa93b1c386326024a518d17e931fcb2478ea961239e8867b371c3cdf0aa4a93a134dda43c8e72a43a3e2fff4a153da0ef207a2eb681bff16850796f0d98f66

  • SSDEEP

    3072:UhLEHt/Pc0Z4P4jVac+cao7MyqGXxFLrSHMmnw1R/H+AIN6oCXCwSi/D:kLG/Py6ccwmMShRr6Vnw1R/HUYoDA

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file

    • Size

      263KB

    • MD5

      efbeb9e59d12e56e8025fb3f13484820

    • SHA1

      84de3934d54cdee52c5e7f15a7043cf549565867

    • SHA256

      f6d40c99bbde7b24d679bde627fb92bd5f695922f8dbdacc567d20fc3e990619

    • SHA512

      9faa93b1c386326024a518d17e931fcb2478ea961239e8867b371c3cdf0aa4a93a134dda43c8e72a43a3e2fff4a153da0ef207a2eb681bff16850796f0d98f66

    • SSDEEP

      3072:UhLEHt/Pc0Z4P4jVac+cao7MyqGXxFLrSHMmnw1R/H+AIN6oCXCwSi/D:kLG/Py6ccwmMShRr6Vnw1R/HUYoDA

    • 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