Overview

overview

10

Static

static

3

9f88f8dba6...70.exe

windows7-x64

10

9f88f8dba6...70.exe

windows10-2004-x64

10

Sharing

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General

  • Target

    033b137b0cb9a9c688701f67b5b212b773cdcf711241ea24f8f8c4dc9fcf6f3c

  • Size

    175KB

  • Sample

    240417-qtx4fsbc6w

  • MD5

    e120e632316f05b29ef95ba390f24c76

  • SHA1

    60377d7bd1bd11b5f656e7091c23d10d37fe7256

  • SHA256

    033b137b0cb9a9c688701f67b5b212b773cdcf711241ea24f8f8c4dc9fcf6f3c

  • SHA512

    5eafba5c031f13fb89fecb2087b340437b50ddf4a9567bbb52ceb27f8933c8faea2e531e68957a0cfdb9417bc39770b9bfea72b321126bbe3a890ce6dfa8e254

  • SSDEEP

    3072:9u5iKgwEAC67UxwDi7QsVnpehI5hI5WRk4LrZL5DSBsVelGwVUg8mq2zdW1eWhOz:cgKEQUGDi7Qsa65hI54lP4Fp3d2q

Score
10/10
tofseeevasionpersistencetrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      9f88f8dba6df3a1116c8444e9b03812fcadf4d8bf9f67d6cfcfb42eaae819e70.exe

    • Size

      299KB

    • MD5

      54b34c36efd4417cbcc35e2ac2c3e67c

    • SHA1

      1e8515d94951bdf686fc5e2ab33885fb99efbaeb

    • SHA256

      9f88f8dba6df3a1116c8444e9b03812fcadf4d8bf9f67d6cfcfb42eaae819e70

    • SHA512

      af0134597248b30fd78b3cc7d73760a9aea62d27edcb5be7874373fe8dc04b3e0c6327443fda38ac32a8ba74119cfd7b02b2b711ce3280abbe1335cb6fee62b4

    • SSDEEP

      3072:9LJYk6t5eTZuuC3rYFwHV6nRKgB2k3zjdCZr6TN8TiuFxAXc5OUZdu8HVZO7:9LKlsTa3rYfB24Mr2s4jUTu8HVc7

    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