Overview

overview

10

Static

static

3

c9de4b54fa...56.exe

windows7-x64

10

c9de4b54fa...56.exe

windows10-2004-x64

10

Analysis

  • max time kernel
    149s
  • max time network
    149s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    26-09-2024 02:12

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General

  • Target

    c9de4b54faf92e550c243ba8364a01f1e5ac5f1906069ccc05391a78d83e9456.exe

  • Size

    247KB

  • MD5

    d454c66549a2a4d14117bd74db531ec5

  • SHA1

    81aec0b242c051e83cf9a40a1c878b6b61435a04

  • SHA256

    c9de4b54faf92e550c243ba8364a01f1e5ac5f1906069ccc05391a78d83e9456

  • SHA512

    688376441cf802fbd0c03f638c6e4b8ed6088662fb08968ca9c5592ad7d5f7f8eff12cd531670d8e3b8c2fbf3eb1edcd234f5652a82495b5f8d4acdb880c5740

  • SSDEEP

    3072:BrLMNa0RHtLiSJ8mVvlRncMK2n5tXVYz3M5Q3a/xZ2HQaej:BrLMUIHNig3DGMzFYc5Q3ER

Score
10/10
tofseediscoveryevasionexecutionpersistenceprivilege_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
  • Windows security bypass 2 TTPs 1 IoCs
    evasiontrojan
  • Creates new service(s) 2 TTPs
    persistenceexecution
  • Modifies Windows Firewall 2 TTPs 1 IoCs
    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\c9de4b54faf92e550c243ba8364a01f1e5ac5f1906069ccc05391a78d83e9456.exe
    "C:\Users\Admin\AppData\Local\Temp\c9de4b54faf92e550c243ba8364a01f1e5ac5f1906069ccc05391a78d83e9456.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2360
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ftczfvaz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2160
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\rurkbdxn.exe" C:\Windows\SysWOW64\ftczfvaz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1264
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ftczfvaz binPath= "C:\Windows\SysWOW64\ftczfvaz\rurkbdxn.exe /d\"C:\Users\Admin\AppData\Local\Temp\c9de4b54faf92e550c243ba8364a01f1e5ac5f1906069ccc05391a78d83e9456.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2356
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ftczfvaz "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1932
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ftczfvaz
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2836
    • 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:2760
  • C:\Windows\SysWOW64\ftczfvaz\rurkbdxn.exe
    C:\Windows\SysWOW64\ftczfvaz\rurkbdxn.exe /d"C:\Users\Admin\AppData\Local\Temp\c9de4b54faf92e550c243ba8364a01f1e5ac5f1906069ccc05391a78d83e9456.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2888
    • 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:2960

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\rurkbdxn.exe
    Filesize

    13.8MB

    MD5

    4ed6d68ef7cc51fa547978ea15dd5c32

    SHA1

    fbfd84c0218e5491d733aa7083525dc2145bf1a9

    SHA256

    d657d3d95f998d6058f225119cf52b7245e85502139deb4e9abd7f52f1ab8611

    SHA512

    2f4d6cd86ee5e027e5c0fbb4197e6af3c8d05817440ebfdcb927b8a98cd69434acbed4c3a7649bacbfff963ae5d912a46ef4ef7afbdd55fcfb67a6f12d0609e6

    Download Submit

  • memory/2360-2-0x00000000002A0000-0x00000000002B3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2360-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2360-7-0x0000000000400000-0x0000000000539000-memory.dmp

    Filesize

    1.2MB

    Download

  • memory/2360-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2360-8-0x00000000002A0000-0x00000000002B3000-memory.dmp

    Filesize

    76KB

    Download

  • memory/2360-1-0x00000000005B0000-0x00000000006B0000-memory.dmp

    Filesize

    1024KB

    Download

  • memory/2888-17-0x0000000000400000-0x0000000000539000-memory.dmp

    Filesize

    1.2MB

    Download

  • memory/2960-55-0x00000000001E0000-0x00000000001E7000-memory.dmp

    Filesize

    28KB

    Download

  • memory/2960-43-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2960-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2960-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2960-20-0x0000000001990000-0x0000000001B9F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2960-24-0x0000000000130000-0x0000000000136000-memory.dmp

    Filesize

    24KB

    Download

  • memory/2960-27-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-23-0x0000000001990000-0x0000000001B9F000-memory.dmp

    Filesize

    2.1MB

    Download

  • memory/2960-30-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

    Download

  • memory/2960-51-0x0000000005500000-0x000000000590B000-memory.dmp

    Filesize

    4.0MB

    Download

  • memory/2960-50-0x00000000001D0000-0x00000000001D5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2960-47-0x00000000001D0000-0x00000000001D5000-memory.dmp

    Filesize

    20KB

    Download

  • memory/2960-46-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

    Download

  • memory/2960-45-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-44-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-42-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-41-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-40-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-38-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-39-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-37-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-36-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-35-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-34-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-33-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-32-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-31-0x00000000001C0000-0x00000000001D0000-memory.dmp

    Filesize

    64KB

    Download

  • memory/2960-54-0x0000000005500000-0x000000000590B000-memory.dmp

    Filesize

    4.0MB

    Download