Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Sharing

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General

  • Target

    8b3014806b4e788228c201c7069d465a9b932b82fe9e10a829cd4fba2395fada

  • Size

    422KB

  • Sample

    240903-ycr5waweje

  • MD5

    fa518dd0a1bfbcd1a98f47ddce5db06c

  • SHA1

    5eacf7d80b50651aa3fbce275959836d4d56708c

  • SHA256

    8b3014806b4e788228c201c7069d465a9b932b82fe9e10a829cd4fba2395fada

  • SHA512

    4f5e07b16811911daed948eda40af0483ba49eff666f531499c78f72908da49cb95bc0b25ff1b222584e66e14a0deea2ce3774f5d1bd9a355b82a782b545477b

  • SSDEEP

    6144:damYSD4Mswaf3LUfkOHHXgTKAtVHIebIlPmxwl94b7:dLYSD4xj3L9OHZA3Iebqm6qb7

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      8b3014806b4e788228c201c7069d465a9b932b82fe9e10a829cd4fba2395fada

    • Size

      422KB

    • MD5

      fa518dd0a1bfbcd1a98f47ddce5db06c

    • SHA1

      5eacf7d80b50651aa3fbce275959836d4d56708c

    • SHA256

      8b3014806b4e788228c201c7069d465a9b932b82fe9e10a829cd4fba2395fada

    • SHA512

      4f5e07b16811911daed948eda40af0483ba49eff666f531499c78f72908da49cb95bc0b25ff1b222584e66e14a0deea2ce3774f5d1bd9a355b82a782b545477b

    • SSDEEP

      6144:damYSD4Mswaf3LUfkOHHXgTKAtVHIebIlPmxwl94b7:dLYSD4xj3L9OHZA3Iebqm6qb7

    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

    • 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