General

  • Target

    9a2e1832fa6c6e8ef98f9a5d4e25aa982baad20584f6cd07a775fd56a87fd542.zip

  • Size

    189KB

  • Sample

    221130-jvg1asbe52

  • MD5

    d44b3f58554737f12c8fb2af012ad201

  • SHA1

    f55995af2c6843aab125abf5db23e504d5fe08c4

  • SHA256

    507b14727e7f4fd7f5437b55b02206ee6a6a4c5ce605be05d724cdbca687f569

  • SHA512

    606f7eda0c40fdce5a71b74307ccb5c5299263ed94e28be5cc5b30084923c14bf3d4c4e8e84ad64d270b62fec06d10551c4b7424d6cc5ebd54fa6216e797b198

  • SSDEEP

    3072:52PZ82l/AUPD0BI8pi1BFvKDBFTRhRksUK9s0rvigoPehppGM0fWp6zZu:KZVlR8YFYHV7lr6tejwM0fXzZu

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      9a2e1832fa6c6e8ef98f9a5d4e25aa982baad20584f6cd07a775fd56a87fd542.exe

    • Size

      271KB

    • MD5

      7ee4d80bfc19c2bbfd18d3cd405913c4

    • SHA1

      3b363e30b9d515005a812b50c431c76ef4d0726b

    • SHA256

      9a2e1832fa6c6e8ef98f9a5d4e25aa982baad20584f6cd07a775fd56a87fd542

    • SHA512

      a63e138361aec1ce9a84f051c4d10a5a379ea8288e19379114e332d75c43df616110945bb0374b93401db27f052458c14954a369d9fea1d9fe5866730817be10

    • SSDEEP

      6144:fevhs3Ko6VzLt3jC8YjrmFZQRUkHhSfbr5W:f0s3Kxzh3udvOQRBH0fbr0

    • 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)

    • 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.

    • Deletes itself

    • 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