Analysis

  • max time kernel
    146s
  • max time network
    152s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    22-11-2024 17:19

General

  • Target

    6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe

  • Size

    172KB

  • MD5

    c795a6ac03536cab09f978bc5791a9b6

  • SHA1

    3e44e52011285caf407bf1a50175699cd4f3d673

  • SHA256

    6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f

  • SHA512

    173fbfd25d69b2e2b5f2a8d7d814278a439d13ec6ec6c93a1b662126dd23295105eff9f05d1438f95863caa328a28a977a9aa85c68c09256e5a0b392e0adf2eb

  • SSDEEP

    3072:HTLTWx01rYIM9Nhrqzn150fkTCUuhGgrBXETBS:zLTz8ICNDfzUcGS

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.

  • 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\6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe
    "C:\Users\Admin\AppData\Local\Temp\6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3392
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ywkwxdgn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5064
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\twpaajkk.exe" C:\Windows\SysWOW64\ywkwxdgn\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4032
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ywkwxdgn binPath= "C:\Windows\SysWOW64\ywkwxdgn\twpaajkk.exe /d\"C:\Users\Admin\AppData\Local\Temp\6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2604
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ywkwxdgn "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3816
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ywkwxdgn
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3048
    • 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:5008
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3392 -s 1040
      2⤵
      • Program crash
      PID:1156
  • C:\Windows\SysWOW64\ywkwxdgn\twpaajkk.exe
    C:\Windows\SysWOW64\ywkwxdgn\twpaajkk.exe /d"C:\Users\Admin\AppData\Local\Temp\6ab57929c7fb967824f95db9980c8b85cc6f112e2037b78d7e11e1760ee9870f.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4600
    • 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:3068
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4600 -s 528
      2⤵
      • Program crash
      PID:1932
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 440 -p 3392 -ip 3392
    1⤵
      PID:4624
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 4600 -ip 4600
      1⤵
        PID:2284

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        14.0MB

        MD5

        b14bbd0d42a3a17508a6373cb43b8c2d

        SHA1

        70411bd8744e25c3f0b1122343e259bf5945f0df

        SHA256

        408e648ffc6eab14ac59e0b8b0ffc02f985e6be2c9c23258e8146199bc382e9a

        SHA512

        9d3424e51b9e629222913de0de3eabc19a20b9b0780c92799d85ee6b4c50ae56065715b7f5026fcd8ab8169526de8f40e1ab396abebf760d88b702e0621b7ed1

      • memory/3068-55-0x0000000001DD0000-0x0000000001DD7000-memory.dmp

        Filesize

        28KB

      • memory/3068-36-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-30-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-51-0x0000000007640000-0x0000000007A4B000-memory.dmp

        Filesize

        4.0MB

      • memory/3068-33-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-34-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-35-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-37-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-38-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-14-0x0000000000A20000-0x0000000000A35000-memory.dmp

        Filesize

        84KB

      • memory/3068-16-0x0000000000A20000-0x0000000000A35000-memory.dmp

        Filesize

        84KB

      • memory/3068-17-0x0000000000A20000-0x0000000000A35000-memory.dmp

        Filesize

        84KB

      • memory/3068-39-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-54-0x0000000007640000-0x0000000007A4B000-memory.dmp

        Filesize

        4.0MB

      • memory/3068-27-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-24-0x0000000000BF0000-0x0000000000BF6000-memory.dmp

        Filesize

        24KB

      • memory/3068-23-0x0000000002600000-0x000000000280F000-memory.dmp

        Filesize

        2.1MB

      • memory/3068-32-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-31-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-40-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-20-0x0000000002600000-0x000000000280F000-memory.dmp

        Filesize

        2.1MB

      • memory/3068-50-0x0000000000FE0000-0x0000000000FE5000-memory.dmp

        Filesize

        20KB

      • memory/3068-47-0x0000000000FE0000-0x0000000000FE5000-memory.dmp

        Filesize

        20KB

      • memory/3068-46-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-45-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-44-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-43-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-42-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3068-41-0x0000000000FD0000-0x0000000000FE0000-memory.dmp

        Filesize

        64KB

      • memory/3392-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3392-1-0x0000000000450000-0x0000000000550000-memory.dmp

        Filesize

        1024KB

      • memory/3392-8-0x00000000008A0000-0x00000000008B3000-memory.dmp

        Filesize

        76KB

      • memory/3392-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/3392-7-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/3392-2-0x00000000008A0000-0x00000000008B3000-memory.dmp

        Filesize

        76KB

      • memory/4600-18-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/4600-12-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/4600-13-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB

      • memory/4600-11-0x0000000000400000-0x000000000043F000-memory.dmp

        Filesize

        252KB