Overview

overview

10

Static

static

3

cryptolaemus

windows10-2004-x64

10

cryptolaemus

windows11-21h2-x64

10

Sharing

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General

  • Target

    c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877

  • Size

    213KB

  • Sample

    240906-l2ejvszhne

  • MD5

    ee271bdebc1bcd255611d9003a2833ae

  • SHA1

    fdd6de358c491b1cf26d3a3ec1eb83467a75661c

  • SHA256

    c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877

  • SHA512

    f711a36e4fbf367094d77ac60bf9140a0bfc4d6b620541f4771d8c332066f5823538edc3ca6d09c140b930fafc891c85293c168e6ac9065b9dea814f2f0d5dd6

  • SSDEEP

    6144:taDXnqPnz53mEBAQTcoToM4v//MRb0Vdh1JQ:t6Xq/z53mz3M4vjVdz

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877

    • Size

      213KB

    • MD5

      ee271bdebc1bcd255611d9003a2833ae

    • SHA1

      fdd6de358c491b1cf26d3a3ec1eb83467a75661c

    • SHA256

      c97280c3f5a9f5624e77be287469eb85310b777391395da12d2e66737c98d877

    • SHA512

      f711a36e4fbf367094d77ac60bf9140a0bfc4d6b620541f4771d8c332066f5823538edc3ca6d09c140b930fafc891c85293c168e6ac9065b9dea814f2f0d5dd6

    • SSDEEP

      6144:taDXnqPnz53mEBAQTcoToM4v//MRb0Vdh1JQ:t6Xq/z53mz3M4vjVdz

    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.

    • 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