Overview

overview

10

Static

static

file.exe

windows7-x64

10

file.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    file.exe

  • Size

    277KB

  • Sample

    221202-f93nrsgh54

  • MD5

    f45d7484b380f381a87585575c7db43a

  • SHA1

    bf539ad755fe1524219d2c4ea59ab7f141b812ba

  • SHA256

    c8d141b0d0a157275bb4505cfe3fef75ef9d08f0738299a49be28a0329681f1a

  • SHA512

    4f818cec22ded75b20128891c7e5c6242cbb6e2da89e2909ffbef7257be894b0339389ad8d2fa451bfbf617e56a1dcab1c8c1ceeb01ca551b3d5ab2c4a5c597d

  • SSDEEP

    6144:r+MLF21xnMnD4j/A2AO8E4rOKnuRjMgU:rJx27MD4jZU/uRQg

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Targets

    • Target

      file.exe

    • Size

      277KB

    • MD5

      f45d7484b380f381a87585575c7db43a

    • SHA1

      bf539ad755fe1524219d2c4ea59ab7f141b812ba

    • SHA256

      c8d141b0d0a157275bb4505cfe3fef75ef9d08f0738299a49be28a0329681f1a

    • SHA512

      4f818cec22ded75b20128891c7e5c6242cbb6e2da89e2909ffbef7257be894b0339389ad8d2fa451bfbf617e56a1dcab1c8c1ceeb01ca551b3d5ab2c4a5c597d

    • SSDEEP

      6144:r+MLF21xnMnD4j/A2AO8E4rOKnuRjMgU:rJx27MD4jZU/uRQg

    Score
    10/10
    tofseeevasionpersistencetrojan

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • Creates new service(s)

      persistence

    • Executes dropped EXE

    • Modifies Windows Firewall

      evasion

    • Sets service image path in registry

      persistence

    • Checks computer location settings

      Looks up country code configured in the registry, likely geofence.

    • Deletes itself

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v6

Initial Access

Execution

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

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks