Overview

overview

10

Static

static

3

13d2063c4b...30.exe

windows7-x64

10

13d2063c4b...30.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    13d2063c4b52fc127970c1d1bde5a730.bin

  • Size

    151KB

  • Sample

    240727-byzeraybrk

  • MD5

    13d2063c4b52fc127970c1d1bde5a730

  • SHA1

    520a74fb30dbd091e574679a2fba54be28e387bb

  • SHA256

    4a64c457c8ad2ff6e90cf46e3a7586da574f223b10b926e63d7f41e9a8ed886d

  • SHA512

    e655a2efd06bc80a1976ac20937f0a6dfb078acb4b4377788fb8c74bbd9cced13dd684dc3923c9d9058f0dbae4d3523462c14b2e77d79b3be88e7a641f314c4e

  • SSDEEP

    3072:0PfLv9vOx8hbxSCL4b5zGEArun5I85iNUKZ:uLv9vDhb4CMXKZ

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      13d2063c4b52fc127970c1d1bde5a730.bin

    • Size

      151KB

    • MD5

      13d2063c4b52fc127970c1d1bde5a730

    • SHA1

      520a74fb30dbd091e574679a2fba54be28e387bb

    • SHA256

      4a64c457c8ad2ff6e90cf46e3a7586da574f223b10b926e63d7f41e9a8ed886d

    • SHA512

      e655a2efd06bc80a1976ac20937f0a6dfb078acb4b4377788fb8c74bbd9cced13dd684dc3923c9d9058f0dbae4d3523462c14b2e77d79b3be88e7a641f314c4e

    • SSDEEP

      3072:0PfLv9vOx8hbxSCL4b5zGEArun5I85iNUKZ:uLv9vDhb4CMXKZ

    Score
    10/10
    tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

    • Tofsee

      Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • Creates new service(s)

      persistenceexecution

    • 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 Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

2
T1562

Disable or Modify System Firewall

1
T1562.004

Disable or Modify Tools

1
T1562.001

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks