General

  • Target

    12fe8a7ae9ffcc9448a4691979854220c88632b1195e503151fcd6530feb3a82.exe

  • Size

    184KB

  • Sample

    221203-ek6hpacg24

  • MD5

    99621d73bf656d6b13b5618c89003240

  • SHA1

    eaf535b75529c353e30a6487a2fa7926b2140d21

  • SHA256

    12fe8a7ae9ffcc9448a4691979854220c88632b1195e503151fcd6530feb3a82

  • SHA512

    88809d0cf937c84242870bc282c393851c99722ead1e4645d1095b9b675c2f7b92f2624252bbc7b15d59c6ee09caed0f37b5cbc3390a60f227f35a6a22c04fd1

  • SSDEEP

    3072:33CMkXisehiDMmwQW5JSwq6CR/7lf5T6O0EI1Zw/+g:CM7iDMm4SwG7nTF0

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      12fe8a7ae9ffcc9448a4691979854220c88632b1195e503151fcd6530feb3a82.exe

    • Size

      184KB

    • MD5

      99621d73bf656d6b13b5618c89003240

    • SHA1

      eaf535b75529c353e30a6487a2fa7926b2140d21

    • SHA256

      12fe8a7ae9ffcc9448a4691979854220c88632b1195e503151fcd6530feb3a82

    • SHA512

      88809d0cf937c84242870bc282c393851c99722ead1e4645d1095b9b675c2f7b92f2624252bbc7b15d59c6ee09caed0f37b5cbc3390a60f227f35a6a22c04fd1

    • SSDEEP

      3072:33CMkXisehiDMmwQW5JSwq6CR/7lf5T6O0EI1Zw/+g:CM7iDMm4SwG7nTF0

    • 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