Overview

overview

10

Static

static

1f79940a99...d4.exe

windows7_x64

10

1f79940a99...d4.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    1f79940a990e2fd2deec9f7613cd816d3c7aaeab29397e9a1316f1aa09f96dd4

  • Size

    171KB

  • Sample

    220612-we1hxsaaen

  • MD5

    f37500c4af0a954ef74ef2f922a1c526

  • SHA1

    913f01ed6876b13005910bec8a8f29520cd10635

  • SHA256

    1f79940a990e2fd2deec9f7613cd816d3c7aaeab29397e9a1316f1aa09f96dd4

  • SHA512

    ab6f26ad1f730f300510597fb8404129c50f6633898b5d97726616c1be47f3b5b67296dc4f9a26176739c8e0fa0bfa867aa6efbc37f65c2f41d7b5f629ea9dbb

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets

    • Target

      1f79940a990e2fd2deec9f7613cd816d3c7aaeab29397e9a1316f1aa09f96dd4

    • Size

      171KB

    • MD5

      f37500c4af0a954ef74ef2f922a1c526

    • SHA1

      913f01ed6876b13005910bec8a8f29520cd10635

    • SHA256

      1f79940a990e2fd2deec9f7613cd816d3c7aaeab29397e9a1316f1aa09f96dd4

    • SHA512

      ab6f26ad1f730f300510597fb8404129c50f6633898b5d97726616c1be47f3b5b67296dc4f9a26176739c8e0fa0bfa867aa6efbc37f65c2f41d7b5f629ea9dbb

    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