Analysis

  • max time kernel
    141s
  • max time network
    153s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    06/09/2024, 14:16

General

  • Target

    RSno9EH0K9.exe

  • Size

    213KB

  • MD5

    8e456f932787fcd0cadbb598174575b2

  • SHA1

    22b069c76b86bdb6be8cdafc78019b55c583062e

  • SHA256

    c55859f35ad07e3e4b13f45fa5fa4c788f7059daac930ea435600a936104c1b5

  • SHA512

    cb26a33dacdcfe804bdd587ecd44b9bf1c59f357e8701fc4f5e1b04d8d8882466c7743fac51969fe8912e1197a5653986eb4a71edc35eee89051b6c98d546c9d

  • SSDEEP

    6144:MGDLD6Tj3Vyg0mwiRjaVlodEFjvn/Mq0Vdh1HQ:M+L2n3VygtzRWJjv+Vdz

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.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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.

  • 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.

  • Modifies data under HKEY_USERS 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe
    "C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3216
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ezmadwbu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4172
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qodleupl.exe" C:\Windows\SysWOW64\ezmadwbu\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1660
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ezmadwbu binPath= "C:\Windows\SysWOW64\ezmadwbu\qodleupl.exe /d\"C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4436
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ezmadwbu "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2672
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ezmadwbu
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3744
    • 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:3020
  • C:\Windows\SysWOW64\ezmadwbu\qodleupl.exe
    C:\Windows\SysWOW64\ezmadwbu\qodleupl.exe /d"C:\Users\Admin\AppData\Local\Temp\RSno9EH0K9.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3108
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Drops file in System32 directory
      • System Location Discovery: System Language Discovery
      • Modifies data under HKEY_USERS
      PID:3132

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

  • C:\Users\Admin\AppData\Local\Temp\qodleupl.exe

    Filesize

    11.0MB

    MD5

    bd4fe323cdf5be915325dfd727efad6a

    SHA1

    f82e8feb989ab0a9c3501ca1fee3a7d0c3b0f22f

    SHA256

    05a37ce50ad0e54adae80bb162520b3ef40311ae79608a4b51471ee9c09b790b

    SHA512

    148690824229801e5b520ab4c2941746744df5fd11232f351873b79cd5dbc8291f0717e0cc1d94498d08932a5e4252ac670738ad112ff2cea19f8f4a09cc9f02

  • memory/3108-10-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3108-16-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3108-13-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3132-48-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-39-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-23-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/3132-26-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/3132-27-0x0000000000DF0000-0x0000000000DF6000-memory.dmp

    Filesize

    24KB

  • memory/3132-30-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-14-0x0000000000C40000-0x0000000000C55000-memory.dmp

    Filesize

    84KB

  • memory/3132-33-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-18-0x0000000000C40000-0x0000000000C55000-memory.dmp

    Filesize

    84KB

  • memory/3132-19-0x0000000000C40000-0x0000000000C55000-memory.dmp

    Filesize

    84KB

  • memory/3132-57-0x0000000007800000-0x0000000007C0B000-memory.dmp

    Filesize

    4.0MB

  • memory/3132-58-0x0000000002DF0000-0x0000000002DF7000-memory.dmp

    Filesize

    28KB

  • memory/3132-54-0x0000000007800000-0x0000000007C0B000-memory.dmp

    Filesize

    4.0MB

  • memory/3132-53-0x0000000002DE0000-0x0000000002DE5000-memory.dmp

    Filesize

    20KB

  • memory/3132-50-0x0000000002DE0000-0x0000000002DE5000-memory.dmp

    Filesize

    20KB

  • memory/3132-49-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-47-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-34-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-36-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-45-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-44-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-43-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-42-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-41-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-40-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-35-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-38-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-37-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3132-46-0x0000000002B10000-0x0000000002B20000-memory.dmp

    Filesize

    64KB

  • memory/3216-1-0x00000000005C0000-0x00000000006C0000-memory.dmp

    Filesize

    1024KB

  • memory/3216-9-0x0000000000400000-0x000000000043C000-memory.dmp

    Filesize

    240KB

  • memory/3216-2-0x00000000005A0000-0x00000000005B3000-memory.dmp

    Filesize

    76KB

  • memory/3216-12-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3216-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3216-7-0x00000000005C0000-0x00000000006C0000-memory.dmp

    Filesize

    1024KB

  • memory/3216-11-0x00000000005A0000-0x00000000005B3000-memory.dmp

    Filesize

    76KB