Analysis

  • max time kernel
    150s
  • 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, 01:44

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:3568
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\vriuqzxo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2452
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\dpfsgfxb.exe" C:\Windows\SysWOW64\vriuqzxo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4312
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create vriuqzxo binPath= "C:\Windows\SysWOW64\vriuqzxo\dpfsgfxb.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:4356
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description vriuqzxo "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1532
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start vriuqzxo
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3580
    • 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:3656
  • C:\Windows\SysWOW64\vriuqzxo\dpfsgfxb.exe
    C:\Windows\SysWOW64\vriuqzxo\dpfsgfxb.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:2284
    • 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:2212

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.9MB

    MD5

    aeaed6b45a4eab4595eac884294d0696

    SHA1

    bbde3a893d707dbb5172cc8466f1872b72fa1389

    SHA256

    8acc2ba1efd1c2e855ad225d26592b0437692f54bcd39047e8277ff3cce30636

    SHA512

    95db9b54b578ea96da95ab16bd4cb15a03a86125f7126f75c65019e9a17f36c4d4d02ee0a052f1b7d84dbbf9822b6837265de3bf585ddef102ed5e17275baf1a

  • memory/2212-32-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-33-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-20-0x0000000002600000-0x000000000280F000-memory.dmp

    Filesize

    2.1MB

  • memory/2212-27-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-51-0x0000000007600000-0x0000000007A0B000-memory.dmp

    Filesize

    4.0MB

  • memory/2212-11-0x0000000000A00000-0x0000000000A15000-memory.dmp

    Filesize

    84KB

  • memory/2212-13-0x0000000000A00000-0x0000000000A15000-memory.dmp

    Filesize

    84KB

  • memory/2212-21-0x0000000000BF0000-0x0000000000BF6000-memory.dmp

    Filesize

    24KB

  • memory/2212-24-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-15-0x0000000000A00000-0x0000000000A15000-memory.dmp

    Filesize

    84KB

  • memory/2212-17-0x0000000002600000-0x000000000280F000-memory.dmp

    Filesize

    2.1MB

  • memory/2212-42-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-52-0x0000000002BD0000-0x0000000002BD7000-memory.dmp

    Filesize

    28KB

  • memory/2212-48-0x0000000007600000-0x0000000007A0B000-memory.dmp

    Filesize

    4.0MB

  • memory/2212-47-0x0000000001DF0000-0x0000000001DF5000-memory.dmp

    Filesize

    20KB

  • memory/2212-44-0x0000000001DF0000-0x0000000001DF5000-memory.dmp

    Filesize

    20KB

  • memory/2212-41-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-28-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-30-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-39-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-38-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-37-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-36-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-35-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-34-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-43-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-29-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-31-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2212-40-0x0000000001DA0000-0x0000000001DB0000-memory.dmp

    Filesize

    64KB

  • memory/2284-14-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB

  • memory/3568-1-0x0000000002D80000-0x0000000002E80000-memory.dmp

    Filesize

    1024KB

  • memory/3568-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3568-8-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB

  • memory/3568-9-0x0000000002CE0000-0x0000000002CF3000-memory.dmp

    Filesize

    76KB

  • memory/3568-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3568-2-0x0000000002CE0000-0x0000000002CF3000-memory.dmp

    Filesize

    76KB