Analysis

  • max time kernel
    100s
  • max time network
    105s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    01-10-2024 08:58

General

  • Target

    b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe

  • Size

    11.1MB

  • MD5

    19ac32a44156aca36e14ad44a9a5e1c2

  • SHA1

    900669e5aea78afc93bb894ac5d99066d7f21ad3

  • SHA256

    b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936

  • SHA512

    461426485f7337a776f9ff8a47b27aa079507d61c6222fc035a7402c5647dac4331f0c3f1e25d229e42bd7fca5c134980c499e0db81607f695f964d0ce5f6648

  • SSDEEP

    6144:zdVCxKg+IFppIHzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzD:B85tFpp

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Windows security bypass 2 TTPs 1 IoCs
  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • 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 5 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe
    "C:\Users\Admin\AppData\Local\Temp\b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1988
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zwmwhovr\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1744
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ucivadwr.exe" C:\Windows\SysWOW64\zwmwhovr\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2928
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create zwmwhovr binPath= "C:\Windows\SysWOW64\zwmwhovr\ucivadwr.exe /d\"C:\Users\Admin\AppData\Local\Temp\b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2144
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description zwmwhovr "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2728
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start zwmwhovr
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2680
    • 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:2776
  • C:\Windows\SysWOW64\zwmwhovr\ucivadwr.exe
    C:\Windows\SysWOW64\zwmwhovr\ucivadwr.exe /d"C:\Users\Admin\AppData\Local\Temp\b3c1e9f75d14351aa6d078525ed891bbefdf29c0a609efa9ebd9db997c455936.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2760
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • 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:2812

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.9MB

    MD5

    da615fcf494dbcb6c6a2dbca40b91886

    SHA1

    65cb2e1e45412120489e0c9c0c540bd3622fb601

    SHA256

    3220c1baf4922965d9d38651147d88b40ceb1e6748dc3e75d40721f0b15029f1

    SHA512

    b21ee346430cc7daa394786dc4060122a8202e1eab0829d4b371d231e5597f9a6e288b8c2fc7e6d18aaa63041a1f89f70630c8aec9342c8a73251da58c33c3f8

  • memory/2812-3-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2812-8-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2812-6-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2812-5-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2812-9-0x00000000000C0000-0x00000000000D5000-memory.dmp

    Filesize

    84KB

  • memory/2812-14-0x0000000001C90000-0x0000000001E9F000-memory.dmp

    Filesize

    2.1MB

  • memory/2812-15-0x00000000001D0000-0x00000000001D6000-memory.dmp

    Filesize

    24KB

  • memory/2812-18-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-11-0x0000000001C90000-0x0000000001E9F000-memory.dmp

    Filesize

    2.1MB

  • memory/2812-21-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-22-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-23-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-24-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-25-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-41-0x00000000002C0000-0x00000000002C5000-memory.dmp

    Filesize

    20KB

  • memory/2812-43-0x00000000058C0000-0x0000000005CCB000-memory.dmp

    Filesize

    4.0MB

  • memory/2812-38-0x00000000002C0000-0x00000000002C5000-memory.dmp

    Filesize

    20KB

  • memory/2812-37-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-36-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-35-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-45-0x00000000058C0000-0x0000000005CCB000-memory.dmp

    Filesize

    4.0MB

  • memory/2812-46-0x0000000000470000-0x0000000000477000-memory.dmp

    Filesize

    28KB

  • memory/2812-34-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-33-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-32-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-31-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-30-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-29-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-28-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-27-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB

  • memory/2812-26-0x00000000001E0000-0x00000000001F0000-memory.dmp

    Filesize

    64KB