Overview

overview

10

Static

static

3

2496bd1f22...8f.exe

windows7-x64

10

2496bd1f22...8f.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    e908efc5c057ba1a4fedc8d7f4ce76c29c50d7a4f03702de8945a47a9c21b24e

  • Size

    128KB

  • Sample

    240417-qvrm3ahg66

  • MD5

    4fa58c8e2b43af8f4187af538e24e3ef

  • SHA1

    fcc2a05e18c22a210596b168041f7c159833449b

  • SHA256

    e908efc5c057ba1a4fedc8d7f4ce76c29c50d7a4f03702de8945a47a9c21b24e

  • SHA512

    1a9a13eae50b5979adddd015bdeb25edea41676b4f1f3f8cb170a70835b5677bf230f78511c2e8f82e54163562362b38e16fb78ff14fd88ab87873d370eac744

  • SSDEEP

    3072:9Syi8zwswtvdcY24I8S3nlJqz1W43WiNZN5zlunOxg303:cySd0U2b43Dzlunqm03

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      2496bd1f22e675f292a9176022379b39bd6c0a74ca928ca3cca4d639a66f108f.exe

    • Size

      233KB

    • MD5

      b9c89c3ed216df0e259b9d0b38a2dc94

    • SHA1

      ea82873249048a2dc026d8bb24616147a9d95729

    • SHA256

      2496bd1f22e675f292a9176022379b39bd6c0a74ca928ca3cca4d639a66f108f

    • SHA512

      ce196ae521c72a6d6ea968a8a948f5ec7040a79616146e8b175accad9277c4a5e825b3af6d45bfde65f430863c0386a5724dd16e07d9b27878082d86a7644c88

    • SSDEEP

      3072:rJWQg26WaXsiQLhJi3s1KMnwFlscekf3O2D+sYc+VhfRv9ae:rJrSiLslsclz+PZ9f

    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

    • 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