General

  • Target

    420986181d606937b8434fdd13f0c262381d4eafde471509b5da741e39ce3ef8

  • Size

    255KB

  • Sample

    220122-3fy5tadgdq

  • MD5

    274c42e8ea8f8e2bbd8018ff68783bb0

  • SHA1

    e4f289453f09c0ccc4b502a6c47984badc64877c

  • SHA256

    420986181d606937b8434fdd13f0c262381d4eafde471509b5da741e39ce3ef8

  • SHA512

    55bf118afd000adbc72653b2f41c78b2a65f6ef634f8533328ad8f4322c36ac90b5760f1c058b1b5df7df3468da6cee9466d270b859f69d4b4baef80f1c79828

Malware Config

Extracted

Family

tofsee

C2

patmushta.info

ovicrush.cn

Targets

    • Target

      420986181d606937b8434fdd13f0c262381d4eafde471509b5da741e39ce3ef8

    • Size

      255KB

    • MD5

      274c42e8ea8f8e2bbd8018ff68783bb0

    • SHA1

      e4f289453f09c0ccc4b502a6c47984badc64877c

    • SHA256

      420986181d606937b8434fdd13f0c262381d4eafde471509b5da741e39ce3ef8

    • SHA512

      55bf118afd000adbc72653b2f41c78b2a65f6ef634f8533328ad8f4322c36ac90b5760f1c058b1b5df7df3468da6cee9466d270b859f69d4b4baef80f1c79828

    • 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 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

Modify Registry

1
T1112

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Tasks