Overview

overview

10

Static

static

3

b557b08289...92.exe

windows7-x64

10

b557b08289...92.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    99cca441218fe7416251f795e7cc47f7163cfd86207f3924f3cfe252eca595d8

  • Size

    145KB

  • Sample

    240417-r7x62sec8y

  • MD5

    a37929c5cb3882b302684b7d8f238cee

  • SHA1

    6b19d192249f5e45440ebabbbcb4c646f6880486

  • SHA256

    99cca441218fe7416251f795e7cc47f7163cfd86207f3924f3cfe252eca595d8

  • SHA512

    a825198cb22684234b97b44bd07110cb7ffaaafba697948ef8274d1a0604583eeb56af58cc2c99b3bcce14872dc1e1b37e665e67eab4d86c86c0787b76238291

  • SSDEEP

    3072:7d5GSFZK6k2cPYRHPaAU6FILQjFsNSLqLaznXiujw:pFZK6krPYlhpIYI2qLKXiOw

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      b557b082890ce023270e4291073976f24d7e68b1ab58890bb95b310785142992.exe

    • Size

      229KB

    • MD5

      68502dbaf73be1eca888f78e3b06d55a

    • SHA1

      14654e87e085e07b91535c7e4e8bc5f41ced65e4

    • SHA256

      b557b082890ce023270e4291073976f24d7e68b1ab58890bb95b310785142992

    • SHA512

      d87cad3ac8f7f18cb12e63c9bb6a74f29dabf09d5374c64d51ce7a1b3621fd65e454ecf6ff0d0551b80685117b450abf50494b669ad48d5a9906b44e7364d6cb

    • SSDEEP

      3072:+nBlv1nZAbXsdUs0vEJier1K2x5b2CZ/P20DMb9rAn5M23R8Gj7mkg+cmH:+nBXk1fmK+G0DMb9rA6Gj7mkHco

    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