Overview

overview

10

Static

static

3

831ef42dfd...49.exe

windows7-x64

10

831ef42dfd...49.exe

windows10-2004-x64

10

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General

  • Target

    831ef42dfd54d0697baf05d276538eef4eef184569b4df67a076d15993288749

  • Size

    234KB

  • Sample

    240719-q4x67sxfma

  • MD5

    733a03ea40d8f226ebcec8fe9ae18fa6

  • SHA1

    00c635d4b74fdf6946b6b675f593d9d99dce22c2

  • SHA256

    831ef42dfd54d0697baf05d276538eef4eef184569b4df67a076d15993288749

  • SHA512

    55f25760f16fe47f4aec2ea6f6ebf148b4989e718f9830f77e3338c8bad3c18e81233caa8b9478fb9f596e8f700738f5b84cf413bc4814f07a5bbad192f9b0a0

  • SSDEEP

    6144:ArLRRRGOgjjnm3lgYrreMfpaVRQQKBWj:AnBGOQjnmuKrxfpcvKE

Score
10/10
tofseeevasionexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Targets

    • Target

      831ef42dfd54d0697baf05d276538eef4eef184569b4df67a076d15993288749

    • Size

      234KB

    • MD5

      733a03ea40d8f226ebcec8fe9ae18fa6

    • SHA1

      00c635d4b74fdf6946b6b675f593d9d99dce22c2

    • SHA256

      831ef42dfd54d0697baf05d276538eef4eef184569b4df67a076d15993288749

    • SHA512

      55f25760f16fe47f4aec2ea6f6ebf148b4989e718f9830f77e3338c8bad3c18e81233caa8b9478fb9f596e8f700738f5b84cf413bc4814f07a5bbad192f9b0a0

    • SSDEEP

      6144:ArLRRRGOgjjnm3lgYrreMfpaVRQQKBWj:AnBGOQjnmuKrxfpcvKE

    Score
    10/10
    tofseeevasionexecutionpersistenceprivilege_escalationtrojan

    • 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 Enterprise v15

Reconnaissance

Resource Development

Initial Access

Execution

System Services

1
T1569

Service Execution

1
T1569.002

Persistence

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Privilege Escalation

Boot or Logon Autostart Execution

1
T1547

Registry Run Keys / Startup Folder

1
T1547.001

Create or Modify System Process

2
T1543

Windows Service

2
T1543.003

Event Triggered Execution

1
T1546

Netsh Helper DLL

1
T1546.007

Defense Evasion

Impair Defenses

2
T1562

Disable or Modify System Firewall

1
T1562.004

Disable or Modify Tools

1
T1562.001

Modify Registry

2
T1112

Credential Access

Discovery

Query Registry

1
T1012

System Information Discovery

2
T1082

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Tasks