Overview

overview

10

Static

static

3

b09798c07f...b9.exe

windows7-x64

10

b09798c07f...b9.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    4315a0cd33af1e82d50ce23d47bbb27bb95aada8a9e738b58d4a82cab1ecf521

  • Size

    167KB

  • Sample

    240417-qgx8pagh67

  • MD5

    da1d9765f612914425fddba20a7c51dd

  • SHA1

    09138a82e043b50175ec9bd6301f0c8a97848490

  • SHA256

    4315a0cd33af1e82d50ce23d47bbb27bb95aada8a9e738b58d4a82cab1ecf521

  • SHA512

    bf60fc39cbeafd616ce290cfd3ca56fc5e54c851fee903f5376bbd42ae97cec62ef2d409862fe76591d68c3d2c15b033337caf66b3bfecf94795cb981a270dac

  • SSDEEP

    3072:ojA80fgxZwi8Y5ZPX3EA0uTrkLOdBJlVtpuVXwHJSdKoq+crotR8wGjB1:ojEgxmyJX3t0uvmOdBfflHFIFGz

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9.exe

    • Size

      281KB

    • MD5

      45c66a2034297abfc6b5543dfbac04f2

    • SHA1

      21aea98d43c6d0aa86b8ee1777cc51cfae5a634f

    • SHA256

      b09798c07fc468fb557b044326305a10d5b4a7b19c0d6adb88f794990c3634b9

    • SHA512

      a341910130e4a040f02405c553556851cddf6ac2396f7e0d38aa0c7a97894aa9dece5cb9a7ce323bb50f221cfbc27d29641a4ccdc4843af09f9f54a14e6c19ce

    • SSDEEP

      3072:auyDaJPZdL7cHeyf3XJ+rs+MlhxMMKe4uquK9RbPf65xfzW5ffXq3B1k48cV1JD2:auyWJDLwHzf8412Mebd36/fkfAB1pJd

    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