Overview

overview

10

Static

static

3

221b9.exe

windows7-x64

10

221b9.exe

windows10-2004-x64

10

2c42a36d7.exe

windows7-x64

10

2c42a36d7.exe

windows10-2004-x64

10

2da5f7422573.exe

windows7-x64

3

2da5f7422573.exe

windows10-2004-x64

3

3fcc16.exe

windows7-x64

3

3fcc16.exe

windows10-2004-x64

3

4772.exe

windows7-x64

10

4772.exe

windows10-2004-x64

10

6c1a.exe

windows7-x64

10

6c1a.exe

windows10-2004-x64

10

79330.exe

windows7-x64

10

79330.exe

windows10-2004-x64

10

afc500c.exe

windows7-x64

10

afc500c.exe

windows10-2004-x64

8

ef62b5a6474.exe

windows7-x64

10

ef62b5a6474.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    143s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20250207-en
  • resource tags

    arch:x64arch:x86image:win7-20250207-enlocale:en-usos:windows7-x64system
  • submitted
    12/03/2025, 18:50

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General

  • Target

    ef62b5a6474.exe

  • Size

    259KB

  • MD5

    0ba4447a07a7c2c63cfe7aa69173ab6a

  • SHA1

    00273726672ded3869e15e24e09ee1053f547f0f

  • SHA256

    7c3bd96cd755ebe1e700c2b578cf83e88d10ce2529213c5bccf2def62b5a6474

  • SHA512

    0b169df73780dfe8d3e5b4c1c298e51e2cab756482a6f6cb439ddae6e66f4c918daa8aa3f059820b2639651e59bc766dc506df654d218d995e843b5f343ebd4d

  • SSDEEP

    3072:cypgerGfQDgLG96SFeQYWxK14YrLLKzxR/yrhIfD1lBqlb2PDFgvRs5xbBo2+:1xDgLzSHYKg4Yr0bTlm6Zto

Score
10/10
tofseedefense_evasiondiscoveryexecutionpersistenceprivilege_escalationtrojan

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

jotunheim.name

Signatures

  • Tofsee

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

    trojantofsee
  • Tofsee family
    tofsee
  • Windows security bypass 2 TTPs 1 IoCs
    defense_evasiontrojan
  • Creates new service(s) 2 TTPs
    persistenceexecution
  • Modifies Windows Firewall 2 TTPs 1 IoCs
    defense_evasion
  • Sets service image path in registry 2 TTPs 1 IoCs
    persistence
  • Deletes itself 1 IoCs
  • Executes dropped EXE 1 IoCs
  • Drops file in System32 directory 2 IoCs
  • Suspicious use of SetThreadContext 1 IoCs
  • Launches sc.exe 3 IoCs

    Sc.exe is a Windows utlilty to control services on the system.

  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s).

  • Event Triggered Execution: Netsh Helper DLL 1 TTPs 3 IoCs

    Netsh.exe (also referred to as Netshell) is a command-line scripting utility used to interact with the network configuration of a system.

    persistenceprivilege_escalation
  • System Location Discovery: System Language Discovery 1 TTPs 9 IoCs

    Attempt gather information about the system language of a victim in order to infer the geographical location of that host.

    discovery
  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ef62b5a6474.exe
    "C:\Users\Admin\AppData\Local\Temp\ef62b5a6474.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1048
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\favszkbu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2544
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\htbyerxv.exe" C:\Windows\SysWOW64\favszkbu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2312
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create favszkbu binPath= "C:\Windows\SysWOW64\favszkbu\htbyerxv.exe /d\"C:\Users\Admin\AppData\Local\Temp\ef62b5a6474.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:556
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description favszkbu "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2572
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start favszkbu
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2168
    • C:\Windows\SysWOW64\netsh.exe
      "C:\Windows\System32\netsh.exe" advfirewall firewall add rule name="Host-process for services of Windows" dir=in action=allow program="C:\Windows\SysWOW64\svchost.exe" enable=yes>nul
      2⤵
      • Modifies Windows Firewall
      • Event Triggered Execution: Netsh Helper DLL
      • System Location Discovery: System Language Discovery
      PID:2772
  • C:\Windows\SysWOW64\favszkbu\htbyerxv.exe
    C:\Windows\SysWOW64\favszkbu\htbyerxv.exe /d"C:\Users\Admin\AppData\Local\Temp\ef62b5a6474.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2584
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • Sets service image path in registry
      • Deletes itself
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:2860

Network

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

System Information Discovery

1
T1082

System Location Discovery

1
T1614

System Language Discovery

1
T1614.001

Lateral Movement

Collection

Command and Control

Exfiltration

Impact

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\htbyerxv.exe
    Filesize

    14.7MB

    MD5

    c4f2a5504af70f89ea0ceb3f832067fc

    SHA1

    5eed648a2c0cc1f568630722ae5fa30ec91ad817

    SHA256

    0b50784aeebc5fe8346b7e87cef02ba8181e9693ffd2fd6d6ce41ba8833b7484

    SHA512

    c85596ee358913ac9f7175b55cb58363fc60dbc6361c729fb6bec73e55ebcff9177b0ee2f52197ed867ec0b47cfae5f47a636d2f198da842b212c3eae1370a89

    Download Submit

  • memory/1048-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1048-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

    Download

  • memory/1048-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/1048-1-0x00000000008C0000-0x00000000009C0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/1048-14-0x0000000000400000-0x0000000000704000-memory.dmp

    Filesize

    3.0MB

    Download

  • memory/1048-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2584-12-0x0000000000400000-0x0000000000704000-memory.dmp

    Filesize

    3.0MB

    Download

  • memory/2860-50-0x0000000000240000-0x0000000000245000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2860-43-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2860-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2860-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2860-23-0x0000000001AB0000-0x0000000001CBF000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2860-24-0x0000000000160000-0x0000000000166000-memory.dmp

    Filesize

    24KB

    Download

  • memory/2860-27-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-20-0x0000000001AB0000-0x0000000001CBF000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2860-34-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2860-47-0x0000000000240000-0x0000000000245000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2860-46-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-45-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-44-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2860-42-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-41-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-40-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-39-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-38-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-37-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-36-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-35-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-33-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-32-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-31-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-30-0x0000000000170000-0x0000000000180000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2860-51-0x00000000055B0000-0x00000000059BB000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2860-55-0x00000000002B0000-0x00000000002B7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2860-54-0x00000000055B0000-0x00000000059BB000-memory.dmp

    Filesize

    4.0MB

    Download