Overview

overview

10

Static

static

3

8e94ab9df2...b1.exe

windows7-x64

10

8e94ab9df2...b1.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    36051489b6f2137471612168e4ac3ae1c4c5b8dc006129c6832e7eb64ee3b8d1

  • Size

    193KB

  • Sample

    240417-p8n9eshg8v

  • MD5

    f43e388899ff02c732297ad5b0785cc3

  • SHA1

    e446f0e088257e1fd68a86af073a88fa22a55470

  • SHA256

    36051489b6f2137471612168e4ac3ae1c4c5b8dc006129c6832e7eb64ee3b8d1

  • SHA512

    b08346a5f3bc90587995aa7dc4f67d986b10604bb8ab255030dd517ace413c75128ae4686a969555deac0b6b568387d3cd1fddd38cac7ed905e84deeb60ef15c

  • SSDEEP

    3072:rSUzfr08hsiMTXZd4uYqDltMv7nC6r7YJ7CsAXjbp5K4Chl87NOB8JwZ5xN8xasX:rZdaXZmuYqDbMR72ojzeP87NdQ8geSg7

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      8e94ab9df264de254c2961478a718dd9e960b8701a4aa75015fde99d1f1020b1.exe

    • Size

      331KB

    • MD5

      3424a650d03640ec89fbb499d6674480

    • SHA1

      1ea36d7a77ec67039e67f944280dfdcdf1582991

    • SHA256

      8e94ab9df264de254c2961478a718dd9e960b8701a4aa75015fde99d1f1020b1

    • SHA512

      5f8bed9cf3da89216af3b87d580535a29a67a617b8bee82e448ae2d02f4cf38975058d2a0d02cf3d48411745a8fc19d09eb5936b66d7be1c75d31087142e2411

    • SSDEEP

      6144:/K6gQvvYlQo7wU9TZlSmHgafhoeyz5xYmX/M:C5QvvYlhbCmHgGhoeYxYmE

    Score
    10/10
    tofseeevasionpersistencetrojan

    • Tofsee

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

      trojantofsee

    • 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

    • Loads dropped DLL

    • Adds Run key to start application

      persistence

    • 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

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Privilege Escalation

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Boot or Logon Autostart Execution

2
T1547

Registry Run Keys / Startup Folder

2
T1547.001

Defense Evasion

Impair Defenses

1
T1562

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