Overview

overview

10

Static

static

3

8240e21305...40.exe

windows7-x64

10

8240e21305...40.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    f65a1f4030a921f739e448b38f6dd3475dab4bf3b5dc8d52f22bcd9e382b1c19

  • Size

    128KB

  • Sample

    240417-r7nmlsec7t

  • MD5

    6d3e7c759bc0bf6bf3b27fadc454b68c

  • SHA1

    ea110c1a47ffa9959e96a0dc4d606735cc2d8e4f

  • SHA256

    f65a1f4030a921f739e448b38f6dd3475dab4bf3b5dc8d52f22bcd9e382b1c19

  • SHA512

    f658b517b503d2cceafa6d22c5a8e3611d572df1eda38b1a4816fd23bb0b63963dd87b50bf34e39a85b7a08fed304427062ed689a7326412e3fd167ef9060a79

  • SSDEEP

    3072:y+Y9AXzi2T88W8u+t1QIIKBgS5Hm226jpdR1lAM09J4JplGGz:yP9V2AZ+tDd2eT1509J4xz

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40.exe

    • Size

      203KB

    • MD5

      6b7204c0cb219b7d01999025ccd85fdc

    • SHA1

      1f57fbfdcf6d71d0d5a36602e1e83bc9dee3ac7a

    • SHA256

      8240e21305559cabc41ccf60e6683e8fb3f6ae80a20e289e687366ccc4594c40

    • SHA512

      68a19f84eb4d73394a2bb2b7629f9582e91b54713b19e71722ba5359636ce36d9aa9951af7b729d65752a7aff916ee91abd87f34c2e4aad43cebef777800742b

    • SSDEEP

      3072:eSf/dfuraZJXENc8uCXJiXK1K2LS1G2B+vioyUSdUuD5BBNcRrxOJ+cmH:eSf/MQ15t1TB+PSHexLco

    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