Overview

overview

10

Static

static

3

7c44a7de2a...c8.exe

windows7-x64

10

7c44a7de2a...c8.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    04543d61bba615b50f871612ac8124907b8493fae002f29d614fa2032643705d

  • Size

    145KB

  • Sample

    240417-pj8xjaee94

  • MD5

    46396685d6c3c88c83d394dd4d865134

  • SHA1

    e99940ab28943292a4d369cf852d99b93fde7aa2

  • SHA256

    04543d61bba615b50f871612ac8124907b8493fae002f29d614fa2032643705d

  • SHA512

    f82d4decea0703830ff192a6ec158436c015689a1ff9148d25cc8932e5f2e14cbd727a1ee828a3cf1965899d72fdd03da986681d7b2b58f83cf03b615dc6290f

  • SSDEEP

    3072:TYuZ0iOn69VopPtDUnPweDwq8qU9lytEbX2jz7SwyfjhUn4PMUX:T3Z0l69hWgtcdFm4BX

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8.exe

    • Size

      229KB

    • MD5

      ddb3205a92ff18ae17b3f9f93c7b197c

    • SHA1

      b77c666a2d7b1f63ba08316f9a221be6ac1f786a

    • SHA256

      7c44a7de2a7c4175c761e08a2de5d2acd42ad3195d7686e5b8d507f99c30adc8

    • SHA512

      db659ead4fd2ed186f221adf5bb9ab5b686253454eeb307ba247a99d8026c009d72ed11473d4622146c7b6cf59f445ad3b020ac3394d3f61af5bfd385b43c334

    • SSDEEP

      3072:lnUQviqZALXadUs0vEJimn1K29YbqYZgpLneYDR89fJ5j3UxS6MeILYS:lnUzPjflapLnsdT3U2eILY

    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

    • Looks up external IP address via web service

      Uses a legitimate IP lookup service to find the infected system's external IP.

    • 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