Overview

overview

10

Static

static

3

cc3ac85b3c...83.exe

windows7-x64

10

cc3ac85b3c...83.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    cc3ac85b3c5690d542ed9f3266b9bd83.exe

  • Size

    204KB

  • Sample

    240521-c5a66sfe8v

  • MD5

    cc3ac85b3c5690d542ed9f3266b9bd83

  • SHA1

    af14f36d9412a1c79453a622a5ad343cc01ca6f7

  • SHA256

    8eb33da353d3756d8cd4cb9308fd5ef72a9b35441bec41fd17c3f3ee508ea9ab

  • SHA512

    f250d0f37cd513dd6e647355bd1940d7210093eb27a1bf2d6dbe6ef8673af731c7dccef24c9948a36ac4e06a18803c9082fb7db7ba59a5ecbf94d064981c6a74

  • SSDEEP

    3072:hpBsWcSkjvEOx+ss6IR15t471Z6/MJlJnmd772g+iBGLYS:h87S4PIj54brGj+i6Y

Score
10/10
tofseeevasionexecutionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      cc3ac85b3c5690d542ed9f3266b9bd83.exe

    • Size

      204KB

    • MD5

      cc3ac85b3c5690d542ed9f3266b9bd83

    • SHA1

      af14f36d9412a1c79453a622a5ad343cc01ca6f7

    • SHA256

      8eb33da353d3756d8cd4cb9308fd5ef72a9b35441bec41fd17c3f3ee508ea9ab

    • SHA512

      f250d0f37cd513dd6e647355bd1940d7210093eb27a1bf2d6dbe6ef8673af731c7dccef24c9948a36ac4e06a18803c9082fb7db7ba59a5ecbf94d064981c6a74

    • SSDEEP

      3072:hpBsWcSkjvEOx+ss6IR15t471Z6/MJlJnmd772g+iBGLYS:h87S4PIj54brGj+i6Y

    Score
    10/10
    tofseeevasionexecutionpersistencetrojan

    • Tofsee

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

      trojantofsee

    • Windows security bypass

      evasiontrojan

    • Creates new service(s)

      persistenceexecution

    • 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

System Services

1
T1569

Service Execution

1
T1569.002

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