Analysis

  • max time kernel
    144s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250314-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250314-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/04/2025, 02:08

General

  • Target

    2025-04-04_98b2b6f0c65018f9b976770ec8915e32_rhadamanthys_smoke-loader.exe

  • Size

    14.1MB

  • MD5

    98b2b6f0c65018f9b976770ec8915e32

  • SHA1

    a4227f3f5c8be4b94aa7d512ce2edb5fcfe47734

  • SHA256

    a13f75159c1e37cf5e00abb4326dce505956530cb6100e4698c595bff3eb77de

  • SHA512

    49a26282dcbd16bb25bd55f3f6e9208dae01ce198885f7fb689ca1a36b5c030d0508852653de3a39f53cb00f52c502cc10a4de82cd999138dd37761702f883b5

  • SSDEEP

    6144:COFZnjC+veRxHUa6E8PcGQ1GNTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTG:DfnjH6m99ZaGQ

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.

  • Tofsee family
  • 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.

  • 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.

  • 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\2025-04-04_98b2b6f0c65018f9b976770ec8915e32_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-04-04_98b2b6f0c65018f9b976770ec8915e32_rhadamanthys_smoke-loader.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5212
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dlvtnvha\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:720
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vlliugwu.exe" C:\Windows\SysWOW64\dlvtnvha\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5036
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create dlvtnvha binPath= "C:\Windows\SysWOW64\dlvtnvha\vlliugwu.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-04-04_98b2b6f0c65018f9b976770ec8915e32_rhadamanthys_smoke-loader.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3424
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description dlvtnvha "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4628
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start dlvtnvha
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4660
    • 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:4988
  • C:\Windows\SysWOW64\dlvtnvha\vlliugwu.exe
    C:\Windows\SysWOW64\dlvtnvha\vlliugwu.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-04-04_98b2b6f0c65018f9b976770ec8915e32_rhadamanthys_smoke-loader.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5972
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • 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:4936

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.1MB

    MD5

    90839c669735a231a73466498ded028c

    SHA1

    f28d34e7dc32ea5b74a4f39ddf631430d4a3cb22

    SHA256

    d45a1c195a98e95221f16cc4891ef023e6cce79c1e6eed14ce3772bd4bfe6275

    SHA512

    d8a6eabeceb248850b85c2e8d73ee47ec15f39dcffa23d7a1e686b0bf9c190c5f8ac630b9ead5694bd90edbb272a009257dfa409919f9ba3e2d7c14aa9e5da77

  • memory/4936-40-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-30-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-21-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/4936-24-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-27-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-9-0x0000000000430000-0x0000000000445000-memory.dmp

    Filesize

    84KB

  • memory/4936-18-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

  • memory/4936-37-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-14-0x0000000000430000-0x0000000000445000-memory.dmp

    Filesize

    84KB

  • memory/4936-15-0x0000000000430000-0x0000000000445000-memory.dmp

    Filesize

    84KB

  • memory/4936-36-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-52-0x00000000025E0000-0x00000000025E7000-memory.dmp

    Filesize

    28KB

  • memory/4936-48-0x0000000007000000-0x000000000740B000-memory.dmp

    Filesize

    4.0MB

  • memory/4936-47-0x00000000025D0000-0x00000000025D5000-memory.dmp

    Filesize

    20KB

  • memory/4936-44-0x00000000025D0000-0x00000000025D5000-memory.dmp

    Filesize

    20KB

  • memory/4936-43-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-42-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-51-0x0000000007000000-0x000000000740B000-memory.dmp

    Filesize

    4.0MB

  • memory/4936-20-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

  • memory/4936-38-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-35-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-34-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-33-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-32-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-31-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-41-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-29-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-28-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/4936-39-0x0000000000B40000-0x0000000000B50000-memory.dmp

    Filesize

    64KB

  • memory/5212-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/5212-1-0x0000000002DF0000-0x0000000002EF0000-memory.dmp

    Filesize

    1024KB

  • memory/5212-8-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB

  • memory/5212-12-0x0000000002DA0000-0x0000000002DB3000-memory.dmp

    Filesize

    76KB

  • memory/5212-13-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/5212-2-0x0000000002DA0000-0x0000000002DB3000-memory.dmp

    Filesize

    76KB

  • memory/5972-11-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB