General

  • Target

    dcfd58427ccae5817885c01f6dfda5b5030365b51cd7df6303492addb1b521c2.exe

  • Size

    185KB

  • Sample

    221203-g2fppseh71

  • MD5

    e16358efbf3f348d86211625b5bcd82b

  • SHA1

    260dd25620f1d26b5fe77371c95e38ae3b1733eb

  • SHA256

    dcfd58427ccae5817885c01f6dfda5b5030365b51cd7df6303492addb1b521c2

  • SHA512

    1d9b4dbfe83dc0cb6c2a57e91e0e6117a49579648a0976beea97b67225a0447a2aea3765be84811c2b6bc7af58c1b69dc01e052a1c0108b5aec6c43da73b1dca

  • SSDEEP

    3072:CmsM8cuMjsgpUQW5NvbBNslx8Ix6+GjZw/MU0wzQT9:kM7sgp8vlilx8K6+Gzdg

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      dcfd58427ccae5817885c01f6dfda5b5030365b51cd7df6303492addb1b521c2.exe

    • Size

      185KB

    • MD5

      e16358efbf3f348d86211625b5bcd82b

    • SHA1

      260dd25620f1d26b5fe77371c95e38ae3b1733eb

    • SHA256

      dcfd58427ccae5817885c01f6dfda5b5030365b51cd7df6303492addb1b521c2

    • SHA512

      1d9b4dbfe83dc0cb6c2a57e91e0e6117a49579648a0976beea97b67225a0447a2aea3765be84811c2b6bc7af58c1b69dc01e052a1c0108b5aec6c43da73b1dca

    • SSDEEP

      3072:CmsM8cuMjsgpUQW5NvbBNslx8Ix6+GjZw/MU0wzQT9:kM7sgp8vlilx8K6+Gzdg

    • 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