Overview

overview

10

Static

static

3

4da2cf296f...e4.exe

windows7-x64

10

4da2cf296f...e4.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    535134b37aa43990b700243cec5669b4736818d839f1f2f92cdedcc7a7fb9e23

  • Size

    127KB

  • Sample

    240417-r7pvnsec7x

  • MD5

    4fafdcbc16652b687398de9e77e3e40e

  • SHA1

    c638c39cf766c244d090f9c0d7f457a8fe467b4c

  • SHA256

    535134b37aa43990b700243cec5669b4736818d839f1f2f92cdedcc7a7fb9e23

  • SHA512

    29518743be383c45a69174057fa0d0b073e2b8fc57d57f5047e8ce85f5e06414c1231218b83c92787c46ee893f73320792d984e9197aa765f4b31caa01c56e06

  • SSDEEP

    3072:QWV0x5RLe59eu/6Cr4PVXYAcNVOBS0OTzt2AOGEWuIbjA+N:dVo5RLe59eu/6oAc+00OTzt2dvWuIfl

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      4da2cf296ff1402fe8a6e0bdbfb00a06008b8ba5a3825b42f4f75ef2101c8ce4.exe

    • Size

      203KB

    • MD5

      6a029324fa243a4b1cad4a6bbcc2e9a3

    • SHA1

      8187f39aaa95e89707c479db4115b4679110547c

    • SHA256

      4da2cf296ff1402fe8a6e0bdbfb00a06008b8ba5a3825b42f4f75ef2101c8ce4

    • SHA512

      ae92eb275eb0e7b44a1baf80233cc7ccb8ed3d94ad7833ea1de8b040bf4917a1a7de6f952dae0ced3fc307919c20e6748561bbe6eecc771d79f0540f4934fcdf

    • SSDEEP

      3072:FJ9RtZYNXsdUsBGQJiE/1KWvEDAKPeubjLzkYd+IrVXsfR80B+cmH:3bUVu7KPeuvJUAV95co

    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