Overview

overview

10

Static

static

3

8240e21305...40.exe

windows7-x64

10

8240e21305...40.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    19af680433c1c05989d02be606403d6e68f92dc7c3d21af5aa2bcb6325113644

  • Size

    128KB

  • Sample

    240417-rj7etabd46

  • MD5

    e74018aee3237c20e5fbc43202a9ca68

  • SHA1

    0cd58030709d17f82d336da49fb300407791bd85

  • SHA256

    19af680433c1c05989d02be606403d6e68f92dc7c3d21af5aa2bcb6325113644

  • SHA512

    b2213d410c3915d4d0131cb5b2af1f621b58d936254f4a4458269ca61b9269c6ebf6b572881bcd718738bd263b25f31023992bd4758b1a5eecea87630c175b33

  • SSDEEP

    3072:q9i7Dv2X9sNtjrOeYlcZFTmgfnfL70IJgo/ZACpkDt+NF:vqcjrlrTm2nfL7fWo/Z+Dt+NF

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe

    • Size

      203KB

    • MD5

      6b7204c0cb219b7d01999025ccd85fdc

    • SHA1

      1f57fbfdcf6d71d0d5a36602e1e83bc9dee3ac7a

    • SHA256

      8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40

    • SHA512

      68a19f84eb4d73394a2bb2b7629f9582e91b54713b19e71722ba5359636ce36d9aa9951af7b729d65752a7aff916ee91abd87f34c2e4aad43cebef777800742b

    • SSDEEP

      3072:eSf/dfuraZJXENc8uCXJiXK1K2LS1G2B+vioyUSdUuD5BBNcRrxOJ+cmH:eSf/MQ15t1TB+PSHexLco

    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

    • 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

    • Executes dropped EXE

    • Drops file in System32 directory

    • Suspicious use of SetThreadContext

    behavioral1behavioral2

MITRE ATT&CK Matrix ATT&CK v13

Initial Access

Execution

Persistence

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Privilege Escalation

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Defense Evasion

Impair Defenses

2
T1562

Disable or Modify Tools

1
T1562.001

Disable or Modify System Firewall

1
T1562.004

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks