Overview

overview

10

Static

static

3

bc822ed934...f5.exe

windows7-x64

10

bc822ed934...f5.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    c38eec9b203dd0fc734fb30ee2280c9df2f970847be0dcda95f4d7c832d739ef

  • Size

    151KB

  • Sample

    240417-sayxraee8v

  • MD5

    090e4d1a73684ce692942b1688c0dae8

  • SHA1

    795c09d906fcd9ad0ec1bf394f547f2c54f8752e

  • SHA256

    c38eec9b203dd0fc734fb30ee2280c9df2f970847be0dcda95f4d7c832d739ef

  • SHA512

    7b086e30557c96aff7fcd864865f14db6320b087ec8b89cd6ff492ab5f7e88d839a2eba70474b6b90e9bb30206d1a10671f1ba1f6bbf8a011c47fa42b012e4be

  • SSDEEP

    3072:+BvUfWQvQsGREyJ2IubXbicMGNQZUjhtvsVMpzuxmHjV4eEh:+5sW7aIwriQVzA3CiP

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      bc822ed934731c6843e138a7b5a0f643b6852ee233b0fb861040bd95111d09f5.exe

    • Size

      239KB

    • MD5

      a520a1746783fd618b1f805ce48b313f

    • SHA1

      d66c729c5d5b49c0e02f8f692425a6d4743f58cf

    • SHA256

      bc822ed934731c6843e138a7b5a0f643b6852ee233b0fb861040bd95111d09f5

    • SHA512

      04e948f7e1df4856d65e30abfcca3a9ff7417f3e572df32b98d268bd982f87d97fc0a4a955ebe6e75de13d1d0e22132269e4c74124927385010feb00bd34066e

    • SSDEEP

      6144:IfULzEiwjQjbSnDuWi+Ygh5pUTQYJkge:hXEiwjhn4gh5Wtkv

    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