Analysis

  • max time kernel
    144s
  • max time network
    149s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20250313-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20250313-enlocale:en-usos:windows10-2004-x64system
  • submitted
    04/04/2025, 02:01

General

  • Target

    2025-04-04_492cc3c869bc80a15e3d18be7b7ba9cd_rhadamanthys_smoke-loader.exe

  • Size

    10.5MB

  • MD5

    492cc3c869bc80a15e3d18be7b7ba9cd

  • SHA1

    afb94d8b62064928bbf11aa6c7d8665d2580c30e

  • SHA256

    ca56226f54d255776c366b45d8b6e04b0b103d7952d476de6c99bc5f1b9a6e8d

  • SHA512

    e39dd9f36b39513e04c91e85698d6201cf44a49433215b3b5bfe1515d0063a49de7345d3eade01879986925a566c0f32c66035d52003a10552046406b50147ba

  • SSDEEP

    6144:wOFZnjC+veRxHUa6E8PcGQ1GNTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTTX:5fnjH6m99ZaG

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_492cc3c869bc80a15e3d18be7b7ba9cd_rhadamanthys_smoke-loader.exe
    "C:\Users\Admin\AppData\Local\Temp\2025-04-04_492cc3c869bc80a15e3d18be7b7ba9cd_rhadamanthys_smoke-loader.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3668
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kjvnpmsh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2728
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\bnvsylrp.exe" C:\Windows\SysWOW64\kjvnpmsh\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4760
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create kjvnpmsh binPath= "C:\Windows\SysWOW64\kjvnpmsh\bnvsylrp.exe /d\"C:\Users\Admin\AppData\Local\Temp\2025-04-04_492cc3c869bc80a15e3d18be7b7ba9cd_rhadamanthys_smoke-loader.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4808
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description kjvnpmsh "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3956
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start kjvnpmsh
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4304
    • 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:4728
  • C:\Windows\SysWOW64\kjvnpmsh\bnvsylrp.exe
    C:\Windows\SysWOW64\kjvnpmsh\bnvsylrp.exe /d"C:\Users\Admin\AppData\Local\Temp\2025-04-04_492cc3c869bc80a15e3d18be7b7ba9cd_rhadamanthys_smoke-loader.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3840
    • 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:4892

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.3MB

    MD5

    1d85cca614c2ad2124cc2436912bb594

    SHA1

    6a7eca9a6ca9442b42288c6b55b482dbfe2887dc

    SHA256

    06f5d590fc9e2345e74470291475665cdef51d7eb766fa72bd98025613a3767f

    SHA512

    96bcde969efd26b257a69798df9fd32d9a51b7f0245ff04b7e4281f288498b3ee6f380aae5a86b20b69f398fe1f35391688ed753a540ca361a46f426ec25e78d

  • memory/3668-2-0x0000000004880000-0x0000000004893000-memory.dmp

    Filesize

    76KB

  • memory/3668-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3668-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/3668-8-0x0000000004880000-0x0000000004893000-memory.dmp

    Filesize

    76KB

  • memory/3668-7-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB

  • memory/3668-1-0x0000000002B50000-0x0000000002C50000-memory.dmp

    Filesize

    1024KB

  • memory/3840-14-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB

  • memory/4892-40-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-34-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-13-0x0000000000770000-0x0000000000785000-memory.dmp

    Filesize

    84KB

  • memory/4892-47-0x0000000002BD0000-0x0000000002BD5000-memory.dmp

    Filesize

    20KB

  • memory/4892-52-0x0000000002BE0000-0x0000000002BE7000-memory.dmp

    Filesize

    28KB

  • memory/4892-48-0x0000000007540000-0x000000000794B000-memory.dmp

    Filesize

    4.0MB

  • memory/4892-44-0x0000000002BD0000-0x0000000002BD5000-memory.dmp

    Filesize

    20KB

  • memory/4892-43-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-42-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-41-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-11-0x0000000000770000-0x0000000000785000-memory.dmp

    Filesize

    84KB

  • memory/4892-38-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-37-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-36-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-35-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-15-0x0000000000770000-0x0000000000785000-memory.dmp

    Filesize

    84KB

  • memory/4892-33-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-32-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-31-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-30-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-29-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-27-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-24-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-51-0x0000000007540000-0x000000000794B000-memory.dmp

    Filesize

    4.0MB

  • memory/4892-39-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-28-0x0000000001D30000-0x0000000001D40000-memory.dmp

    Filesize

    64KB

  • memory/4892-18-0x0000000002600000-0x000000000280F000-memory.dmp

    Filesize

    2.1MB

  • memory/4892-21-0x0000000001D20000-0x0000000001D26000-memory.dmp

    Filesize

    24KB

  • memory/4892-20-0x0000000002600000-0x000000000280F000-memory.dmp

    Filesize

    2.1MB