Analysis

  • max time kernel
    150s
  • 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, 06:56

General

  • Target

    2025-04-04_81cf393b6f480b6f1f00e45732ca7ff9_rhadamanthys_smoke-loader.exe

  • Size

    14.2MB

  • MD5

    81cf393b6f480b6f1f00e45732ca7ff9

  • SHA1

    694f9ca1d900052e7d8d208ffac9ac80acc7d059

  • SHA256

    d32943d823d5b663c04d38b3a0ac781b99a71891e36f7c2ca53b898f1b48356f

  • SHA512

    17cda04215e6a454634d38c60e79017948e5d9650fe7f3ebc8121ab3d5058b7c09b6f57b850e2c6ddd7583b62505c443d37a9e6af60551c996b44f3e849992b1

  • SSDEEP

    49152:vSni2SzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWzWz9:ANO

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.

  • Program crash 2 IoCs
  • 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_81cf393b6f480b6f1f00e45732ca7ff9_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-04-04_81cf393b6f480b6f1f00e45732ca7ff9_rhadamanthys_smoke-loader.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5544
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\elwsfjnt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:828
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\clyryqgz.exe" C:\Windows\SysWOW64\elwsfjnt\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4724
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create elwsfjnt binPath= "C:\Windows\SysWOW64\elwsfjnt\clyryqgz.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-04-04_81cf393b6f480b6f1f00e45732ca7ff9_rhadamanthys_smoke-loader.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4908
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description elwsfjnt "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3188
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start elwsfjnt
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4940
    • 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:3756
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5544 -s 1184
      2⤵
      • Program crash
      PID:4176
  • C:\Windows\SysWOW64\elwsfjnt\clyryqgz.exe
    C:\Windows\SysWOW64\elwsfjnt\clyryqgz.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-04-04_81cf393b6f480b6f1f00e45732ca7ff9_rhadamanthys_smoke-loader.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:5032
    • 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:2276
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 5032 -s 552
      2⤵
      • Program crash
      PID:536
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 5544 -ip 5544
    1⤵
      PID:6100
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 5032 -ip 5032
      1⤵
        PID:2120

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        13.1MB

        MD5

        dc39ec1bbd066dfd42a410bbd382fea5

        SHA1

        751f222efd339c9bfb66b585dc9b4106a723e821

        SHA256

        cefb356d14bf3f825a9821c9be53bd6edcc1a0d4f4f3ac0dd08e03415cf22046

        SHA512

        0f34c00091ff7c22bd974d6d785a3f805935f823d1a054497bc6382dcda29c8fdf79b7e5f9b6924d074bd6b40ac703033846873e0cf39b179a3302a1cf1a0333

      • memory/2276-42-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-44-0x00000000019E0000-0x00000000019E5000-memory.dmp

        Filesize

        20KB

      • memory/2276-51-0x0000000007240000-0x000000000764B000-memory.dmp

        Filesize

        4.0MB

      • memory/2276-21-0x00000000007E0000-0x00000000007E6000-memory.dmp

        Filesize

        24KB

      • memory/2276-24-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-34-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-11-0x0000000000310000-0x0000000000325000-memory.dmp

        Filesize

        84KB

      • memory/2276-13-0x0000000000310000-0x0000000000325000-memory.dmp

        Filesize

        84KB

      • memory/2276-14-0x0000000000310000-0x0000000000325000-memory.dmp

        Filesize

        84KB

      • memory/2276-43-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-17-0x0000000002200000-0x000000000240F000-memory.dmp

        Filesize

        2.1MB

      • memory/2276-20-0x0000000002200000-0x000000000240F000-memory.dmp

        Filesize

        2.1MB

      • memory/2276-48-0x0000000007240000-0x000000000764B000-memory.dmp

        Filesize

        4.0MB

      • memory/2276-52-0x00000000019F0000-0x00000000019F7000-memory.dmp

        Filesize

        28KB

      • memory/2276-47-0x00000000019E0000-0x00000000019E5000-memory.dmp

        Filesize

        20KB

      • memory/2276-29-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-27-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-28-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-30-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-40-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-39-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-38-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-37-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-36-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-35-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-33-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-32-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-31-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/2276-41-0x00000000007F0000-0x0000000000800000-memory.dmp

        Filesize

        64KB

      • memory/5032-15-0x0000000000400000-0x0000000000826000-memory.dmp

        Filesize

        4.1MB

      • memory/5544-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/5544-2-0x0000000002580000-0x0000000002593000-memory.dmp

        Filesize

        76KB

      • memory/5544-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/5544-7-0x0000000000400000-0x0000000000826000-memory.dmp

        Filesize

        4.1MB

      • memory/5544-8-0x0000000002580000-0x0000000002593000-memory.dmp

        Filesize

        76KB

      • memory/5544-1-0x00000000008D0000-0x00000000009D0000-memory.dmp

        Filesize

        1024KB