Overview

overview

10

Static

static

1cf5999bc1...7e.exe

windows7_x64

10

1cf5999bc1...7e.exe

windows10-2004_x64

10

Sharing

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General

  • Target

    1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e

  • Size

    99KB

  • Sample

    220607-fxfcpsefen

  • MD5

    1fd5cc1d4e9cd89756af71a2c633d7e1

  • SHA1

    b3575cedf98cad9a62691531fa7136acd70c160e

  • SHA256

    1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e

  • SHA512

    b639c81f4b4c8cb035b35bfbbb7a830046e8a2734653d25aaf90997a2e3b84b049ace52cf153a462deb8ac7bad4c3fb9455ec0c69304bae18620a1c969d85c61

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets

    • Target

      1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e

    • Size

      99KB

    • MD5

      1fd5cc1d4e9cd89756af71a2c633d7e1

    • SHA1

      b3575cedf98cad9a62691531fa7136acd70c160e

    • SHA256

      1cf5999bc1adcb1a58c7a8369efe850b97bb4a76c837756e9de950bf7790617e

    • SHA512

      b639c81f4b4c8cb035b35bfbbb7a830046e8a2734653d25aaf90997a2e3b84b049ace52cf153a462deb8ac7bad4c3fb9455ec0c69304bae18620a1c969d85c61

    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