Analysis

  • max time kernel
    148s
  • max time network
    150s
  • 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_8a6abae8b7101356c33cd26cf52f53d3_rhadamanthys_smoke-loader.exe

  • Size

    13.7MB

  • MD5

    8a6abae8b7101356c33cd26cf52f53d3

  • SHA1

    04d3310363519c5ff0b46459a2e4ab947ea409b1

  • SHA256

    f5b0ca5061b16cf25f6def7144b20ba6ab3cff9bdc18ab847c6371ee6d115b55

  • SHA512

    b161b8275a33e2fca851e13d0e2aa93b31523d71c0d57ede87337bab04a682ef638a9132a748b87a1b2d389e1ac6f848962dbf59f204c26faaa70aecdb827176

  • SSDEEP

    6144:gOFZnjC+veRxHUa6E8PcGQ1GNTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTj:pfnjH6m99ZaG

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
  • Looks up external IP address via web service 2 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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_8a6abae8b7101356c33cd26cf52f53d3_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-04-04_8a6abae8b7101356c33cd26cf52f53d3_rhadamanthys_smoke-loader.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3436
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\toendtki\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1060
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wiylzyqu.exe" C:\Windows\SysWOW64\toendtki\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2820
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create toendtki binPath= "C:\Windows\SysWOW64\toendtki\wiylzyqu.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-04-04_8a6abae8b7101356c33cd26cf52f53d3_rhadamanthys_smoke-loader.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3696
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description toendtki "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4512
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start toendtki
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4588
    • 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:2004
  • C:\Windows\SysWOW64\toendtki\wiylzyqu.exe
    C:\Windows\SysWOW64\toendtki\wiylzyqu.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-04-04_8a6abae8b7101356c33cd26cf52f53d3_rhadamanthys_smoke-loader.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1644
    • 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:6048

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    15.0MB

    MD5

    6d13a9fde7edd02374b2039321353472

    SHA1

    f86755d84c551ff59835701397232d035e92be29

    SHA256

    0d63a19d030602d1472d419e5266034f1063c3274c90a4f2770f71046fb578e5

    SHA512

    4db13b74fcf54bc094b15f4d68b7d858b17b063f7fe3a71e8fd92a4c58c15e0756cce285c1251c452ec2e035cb70d93cc2ea477cd8ac92d4c7ddb072c9cfb783

  • memory/1644-14-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB

  • memory/3436-2-0x0000000002CE0000-0x0000000002CF3000-memory.dmp

    Filesize

    76KB

  • memory/3436-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3436-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3436-8-0x0000000002CE0000-0x0000000002CF3000-memory.dmp

    Filesize

    76KB

  • memory/3436-1-0x0000000002D90000-0x0000000002E90000-memory.dmp

    Filesize

    1024KB

  • memory/3436-7-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB

  • memory/6048-40-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-35-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-13-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

    Filesize

    84KB

  • memory/6048-44-0x0000000001FF0000-0x0000000001FF5000-memory.dmp

    Filesize

    20KB

  • memory/6048-47-0x0000000001FF0000-0x0000000001FF5000-memory.dmp

    Filesize

    20KB

  • memory/6048-48-0x0000000007680000-0x0000000007A8B000-memory.dmp

    Filesize

    4.0MB

  • memory/6048-52-0x0000000002BD0000-0x0000000002BD7000-memory.dmp

    Filesize

    28KB

  • memory/6048-43-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-42-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-41-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-11-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

    Filesize

    84KB

  • memory/6048-39-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-38-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-37-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-36-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-15-0x0000000000AB0000-0x0000000000AC5000-memory.dmp

    Filesize

    84KB

  • memory/6048-34-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-33-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-32-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-31-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-30-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-29-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-28-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-27-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-24-0x0000000001F60000-0x0000000001F70000-memory.dmp

    Filesize

    64KB

  • memory/6048-21-0x0000000001F50000-0x0000000001F56000-memory.dmp

    Filesize

    24KB

  • memory/6048-20-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB

  • memory/6048-51-0x0000000007680000-0x0000000007A8B000-memory.dmp

    Filesize

    4.0MB

  • memory/6048-18-0x0000000002800000-0x0000000002A0F000-memory.dmp

    Filesize

    2.1MB