Analysis

  • max time kernel
    149s
  • 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, 01:55

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:2308
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\cziwikfv\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3996
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qcsftsko.exe" C:\Windows\SysWOW64\cziwikfv\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5524
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create cziwikfv binPath= "C:\Windows\SysWOW64\cziwikfv\qcsftsko.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:4752
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description cziwikfv "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4836
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start cziwikfv
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2164
    • 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:3496
  • C:\Windows\SysWOW64\cziwikfv\qcsftsko.exe
    C:\Windows\SysWOW64\cziwikfv\qcsftsko.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:5884
    • 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:1420

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

Loading Replay Monitor...

Downloads

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

    Filesize

    10.4MB

    MD5

    1fc2ae6293f9ac01e6778f976d8a757b

    SHA1

    a44663d01d7e94abc40ebfa03580a3c3d8806e26

    SHA256

    80517d89cb70b957060e83bc769851fb5f3d98106c5015a93b4fe02dd71dbdc1

    SHA512

    b1e3634e9298a36f0bf10595392a52863f52b995977fee6ecbbd8bb3e9a15f19a1ce1c2688e4df80880a75ea7b555d4125357a0af1fe350280a14f0a074748c4

  • memory/1420-39-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-41-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-51-0x0000000007040000-0x000000000744B000-memory.dmp

    Filesize

    4.0MB

  • memory/1420-18-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

  • memory/1420-20-0x0000000002000000-0x000000000220F000-memory.dmp

    Filesize

    2.1MB

  • memory/1420-48-0x0000000007040000-0x000000000744B000-memory.dmp

    Filesize

    4.0MB

  • memory/1420-13-0x0000000000470000-0x0000000000485000-memory.dmp

    Filesize

    84KB

  • memory/1420-11-0x0000000000470000-0x0000000000485000-memory.dmp

    Filesize

    84KB

  • memory/1420-15-0x0000000000470000-0x0000000000485000-memory.dmp

    Filesize

    84KB

  • memory/1420-21-0x00000000005F0000-0x00000000005F6000-memory.dmp

    Filesize

    24KB

  • memory/1420-52-0x00000000025E0000-0x00000000025E7000-memory.dmp

    Filesize

    28KB

  • memory/1420-47-0x00000000025D0000-0x00000000025D5000-memory.dmp

    Filesize

    20KB

  • memory/1420-44-0x00000000025D0000-0x00000000025D5000-memory.dmp

    Filesize

    20KB

  • memory/1420-43-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-42-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-27-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-24-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-40-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-28-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-37-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-36-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-35-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-34-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-33-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-32-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-31-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-30-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-29-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/1420-38-0x00000000017F0000-0x0000000001800000-memory.dmp

    Filesize

    64KB

  • memory/2308-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2308-1-0x0000000002C90000-0x0000000002D90000-memory.dmp

    Filesize

    1024KB

  • memory/2308-7-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB

  • memory/2308-8-0x0000000002C10000-0x0000000002C23000-memory.dmp

    Filesize

    76KB

  • memory/2308-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2308-2-0x0000000002C10000-0x0000000002C23000-memory.dmp

    Filesize

    76KB

  • memory/5884-14-0x0000000000400000-0x0000000002B49000-memory.dmp

    Filesize

    39.3MB