Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Sharing

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General

  • Target

    9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866

  • Size

    383KB

  • Sample

    240909-kqv7sssekc

  • MD5

    a7b9d804ad2ead7a1f44135d3e54604e

  • SHA1

    522a5510602009783a7bb3eef2bcabb0cc0a37d8

  • SHA256

    9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866

  • SHA512

    90a844e9d807d7617b1c5482dfa64ad7b75ffd9352c8ec977ef13e772c5c10af868c74363773e4372ce0c8d6b8d8958759e6393bbfac482f2d3d2129db251f5b

  • SSDEEP

    6144:QEKJk5GefGfSmKiE6j7+JZBob0iJbY6B5fo7HEaKf:Qa5BufYw+fBobrhEL

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866

    • Size

      383KB

    • MD5

      a7b9d804ad2ead7a1f44135d3e54604e

    • SHA1

      522a5510602009783a7bb3eef2bcabb0cc0a37d8

    • SHA256

      9cc7ca2bf581e20dbe35e337991bcbdd7ed6cec3d34f71eefc41e4db12698866

    • SHA512

      90a844e9d807d7617b1c5482dfa64ad7b75ffd9352c8ec977ef13e772c5c10af868c74363773e4372ce0c8d6b8d8958759e6393bbfac482f2d3d2129db251f5b

    • SSDEEP

      6144:QEKJk5GefGfSmKiE6j7+JZBob0iJbY6B5fo7HEaKf:Qa5BufYw+fBobrhEL

    Score
    10/10
    tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

    • Tofsee

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

      trojantofsee

    • 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

1
T1562

Disable or Modify System Firewall

1
T1562.004

Modify Registry

1
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