Overview

overview

10

Static

static

3

755b1b45c2...f9.exe

windows7-x64

10

755b1b45c2...f9.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    dcf8056404bffc002e0d258c4dacfc0233fa0121ee1f8e4744fc547c90c98426

  • Size

    127KB

  • Sample

    240417-r7qrzach52

  • MD5

    7ab5c9a806dd581e3e14f1f46b914e42

  • SHA1

    a356ce03073311cf3f15ea0da60986a8e5be79ec

  • SHA256

    dcf8056404bffc002e0d258c4dacfc0233fa0121ee1f8e4744fc547c90c98426

  • SHA512

    5cbc29193f60795a1014158c3ebbb80572430a6bdd6f2105cabfb92eb193ae719560dccb457fd90a7c15adcebf173c1640d5c94152a6eec5a731e652d3db07c0

  • SSDEEP

    3072:NjbnynCyMZUxS27I3GV7KifesvNY0/FmczdZJHMlDn4o5wxnDk:NnnMCF8eeK+gczdPHijwC

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9.exe

    • Size

      203KB

    • MD5

      d88f7c78b3be6c96c33b80a8e1bb85de

    • SHA1

      ce07fb26b0ec69cdf563f98560aa4f7f298e6e8d

    • SHA256

      755b1b45c26d282f094d504074bbdf897f6460968db67dd7d88a4702e03ef7f9

    • SHA512

      1c396a26da383d01ddc317bc4c565c5825b0e452bcf262ac849cd720acb6cb7abcc08e895041e59246dd7686e72424990728745716815a5879bce30769e3e898

    • SSDEEP

      3072:Ef3B/ALaZdXUNc8iirJiM21K7uSbrF068c0E0rBNWRDxlH+cmH:Ef32clVO598c0EHxQco

    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

    • 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