Overview

overview

10

Static

static

4e41be7919...3c.exe

windows7-x64

10

4e41be7919...3c.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    4e41be7919494e0b7e8d3417301228bb0918448e8ab0231bc51aee61f5d2703c

  • Size

    142KB

  • Sample

    220720-ws439seca3

  • MD5

    af23172c56640088451aa6ddd47fd779

  • SHA1

    cdde3744c19b8ec13539ec3e62cdc052136e9681

  • SHA256

    4e41be7919494e0b7e8d3417301228bb0918448e8ab0231bc51aee61f5d2703c

  • SHA512

    82194af5df87f1f850d875300080b945c395e4b0e67ed3eca9f0b83d7ad8fddd88e59200e3ddaa6f5096c5da7aa15a9a9620959b92b6f5b2c85add696812f8a7

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Targets

    • Target

      4e41be7919494e0b7e8d3417301228bb0918448e8ab0231bc51aee61f5d2703c

    • Size

      142KB

    • MD5

      af23172c56640088451aa6ddd47fd779

    • SHA1

      cdde3744c19b8ec13539ec3e62cdc052136e9681

    • SHA256

      4e41be7919494e0b7e8d3417301228bb0918448e8ab0231bc51aee61f5d2703c

    • SHA512

      82194af5df87f1f850d875300080b945c395e4b0e67ed3eca9f0b83d7ad8fddd88e59200e3ddaa6f5096c5da7aa15a9a9620959b92b6f5b2c85add696812f8a7

    Score
    10/10
    tofseeevasionpersistencetrojan

    • Tofsee

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

      trojantofsee

    • 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

Modify Registry

1
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Tasks