Overview

overview

10

Static

static

3

c9ba75c3c2...24.exe

windows7-x64

10

c9ba75c3c2...24.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    521b9e073450bc71db578e7eeee61b78ef3790bf62b2b332f966ec6ab8ef1860

  • Size

    127KB

  • Sample

    240417-qs5f5sbc2x

  • MD5

    8b9fae8cc71ae7d657cd678d9445023f

  • SHA1

    630c54c95e20f5f45445661f2e18c47c4b2d2479

  • SHA256

    521b9e073450bc71db578e7eeee61b78ef3790bf62b2b332f966ec6ab8ef1860

  • SHA512

    aa571442fc352dcbc73e2a4eba79c91eeafd42d5dfa1e50c635b49c221eb985b7f1e15cb1fded55d8877806a075a774db17305911d05676fdac579fb84d9f218

  • SSDEEP

    3072:+//7YB5+JwfoEMzi/G0kMlGsNif+K+vEaE0P1YUT:y7DJJ0kBZ7+MatP1YUT

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      c9ba75c3c2b17dd64211ae2d9859ced46f797f4f25d867c63c813462a857b524.exe

    • Size

      203KB

    • MD5

      90d047019c018e2188352f9aeee97192

    • SHA1

      e0d7eee14e19ddb119760d4e15e387f285d82076

    • SHA256

      c9ba75c3c2b17dd64211ae2d9859ced46f797f4f25d867c63c813462a857b524

    • SHA512

      4aa2fa4f364a398cb763cbd317ea91dbac17e9e5ed44e5ebe09ba16e62cedb588d98ad807adb84127b00c757bcfef31f229aed5294a71ce682ef494da558b5a7

    • SSDEEP

      3072:DkIfnM3Jq/AmlEkJiAj1K/2sv1p6Ti/ZVqJnctmLoQCCRLQ+cmk:DkIzXlEh5VqKtm8CXcL

    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

    • 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

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

Lateral Movement

Collection

Exfiltration

Command and Control

Impact

Resource Development

Reconnaissance

Tasks