General

  • Target

    file.exe

  • Size

    234KB

  • Sample

    230515-z3ah7aab87

  • MD5

    e9de43f24d8b6f5be55ef6971d3d14e5

  • SHA1

    ca701f416d520ed37a6b5103dc8358a53c896410

  • SHA256

    02ada88638528eb89e67ce30a88ca8a58efab167c389ffd893641459bc64666f

  • SHA512

    2ccddd5bda9366a0bd39fa2334ee27f4220816d69569d6d6f064e43ebe5e26c01fa17cfee17197c2e2151501b874ef1d88503a1e4ba40ca36f45e3c062ccdeba

  • SSDEEP

    3072:jVPQzmAd7g0wS/+NvCTrKxdOZIyp+Uq3urvbWUWNiHvv5+kQ54A5W4OCNZ:aBOSearQdN7KoOv8i6Z

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      234KB

    • MD5

      e9de43f24d8b6f5be55ef6971d3d14e5

    • SHA1

      ca701f416d520ed37a6b5103dc8358a53c896410

    • SHA256

      02ada88638528eb89e67ce30a88ca8a58efab167c389ffd893641459bc64666f

    • SHA512

      2ccddd5bda9366a0bd39fa2334ee27f4220816d69569d6d6f064e43ebe5e26c01fa17cfee17197c2e2151501b874ef1d88503a1e4ba40ca36f45e3c062ccdeba

    • SSDEEP

      3072:jVPQzmAd7g0wS/+NvCTrKxdOZIyp+Uq3urvbWUWNiHvv5+kQ54A5W4OCNZ:aBOSearQdN7KoOv8i6Z

    • 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