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

    d544bf09b45f461cc3b0e1241ea3d74d4a3737ae1a27c53839ffd74957c18ace

  • Size

    193KB

  • Sample

    240417-qkz7fshb45

  • MD5

    642b5a3591a2520bc51704f1fcd2fce9

  • SHA1

    3bab609267bc0d7956d60ce1bd68fc0e3402ae0d

  • SHA256

    d544bf09b45f461cc3b0e1241ea3d74d4a3737ae1a27c53839ffd74957c18ace

  • SHA512

    d73673f0dc9ab5f57cf326695354ba9a14806cf82fefa76e549cfd875792c0292365b088b2d9ff8d4c04bd3fcfa8ab7f3e520999005343a66ce91de55d2e421c

  • SSDEEP

    6144:1KUO+MTovnl80j3W90jB390otBScwujdFmIo9R:1KkMkvOe3W9039btocwYUI6R

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

    • 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