Analysis

  • max time kernel
    59s
  • max time network
    61s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    23-09-2024 19:46

General

  • Target

    ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe

  • Size

    14.1MB

  • MD5

    82af93e89cf7525040978c5a5815c123

  • SHA1

    47193983774a29f19ada610751133ed5779915ac

  • SHA256

    ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4

  • SHA512

    08cfb9037aa05269f7303ddbdc522889b5486295d6a8445edc485f39d800eca682c202edf58350eb08d8b0e84c7232c6c2f94698f5951eab402c92f3d5b06d06

  • SSDEEP

    24576:0sPvIp7DpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpbpJ:lvY7

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.

  • 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 5 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe
    "C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2748
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\dxyldwz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2184
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\wqqilvzl.exe" C:\Windows\SysWOW64\dxyldwz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2124
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create dxyldwz binPath= "C:\Windows\SysWOW64\dxyldwz\wqqilvzl.exe /d\"C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:412
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description dxyldwz "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3516
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start dxyldwz
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2912
    • 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:716
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2748 -s 1040
      2⤵
      • Program crash
      PID:3464
  • C:\Windows\SysWOW64\dxyldwz\wqqilvzl.exe
    C:\Windows\SysWOW64\dxyldwz\wqqilvzl.exe /d"C:\Users\Admin\AppData\Local\Temp\ad47fc74baa9ccd6f9b004a990b27393eba378eff2dcc7e2de3ce2b95501c7f4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4428
    • 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:3664
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4428 -s 540
      2⤵
      • Program crash
      PID:4316
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2748 -ip 2748
    1⤵
      PID:2320
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 416 -p 4428 -ip 4428
      1⤵
        PID:4112

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        10.8MB

        MD5

        8d9861d039bcce6549c703626c7c956d

        SHA1

        e6504843fe9f12d51e564e1b1cd59f01570ca621

        SHA256

        ad5fc02b97fb932140cbe33e3e5d29b4b5e13cc892a95ff282cfb3bfffff90e3

        SHA512

        75b2f8ea423c606ae2925d855b11c6194969fe0fcb8d61ee77ba6a1dcedc3cd39fc23c35a5a89c84a146ff9589391f6bcc904bed3ea38e46f35a0696315ca365

      • memory/2748-9-0x00000000023D0000-0x00000000023E3000-memory.dmp

        Filesize

        76KB

      • memory/2748-2-0x00000000023D0000-0x00000000023E3000-memory.dmp

        Filesize

        76KB

      • memory/2748-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2748-8-0x0000000000400000-0x0000000000683000-memory.dmp

        Filesize

        2.5MB

      • memory/2748-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2748-1-0x0000000000830000-0x0000000000930000-memory.dmp

        Filesize

        1024KB

      • memory/3664-47-0x0000000002FE0000-0x0000000002FE5000-memory.dmp

        Filesize

        20KB

      • memory/3664-42-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-16-0x0000000000E40000-0x0000000000E55000-memory.dmp

        Filesize

        84KB

      • memory/3664-45-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-13-0x0000000000E40000-0x0000000000E55000-memory.dmp

        Filesize

        84KB

      • memory/3664-23-0x0000000002A00000-0x0000000002C0F000-memory.dmp

        Filesize

        2.1MB

      • memory/3664-21-0x0000000002A00000-0x0000000002C0F000-memory.dmp

        Filesize

        2.1MB

      • memory/3664-50-0x0000000002FE0000-0x0000000002FE5000-memory.dmp

        Filesize

        20KB

      • memory/3664-54-0x0000000007A00000-0x0000000007E0B000-memory.dmp

        Filesize

        4.0MB

      • memory/3664-55-0x0000000002FF0000-0x0000000002FF7000-memory.dmp

        Filesize

        28KB

      • memory/3664-51-0x0000000007A00000-0x0000000007E0B000-memory.dmp

        Filesize

        4.0MB

      • memory/3664-15-0x0000000000E40000-0x0000000000E55000-memory.dmp

        Filesize

        84KB

      • memory/3664-46-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-44-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-43-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-24-0x0000000000FF0000-0x0000000000FF6000-memory.dmp

        Filesize

        24KB

      • memory/3664-41-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-40-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-39-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-38-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-37-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-36-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-35-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-34-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-33-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-32-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-31-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-30-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/3664-27-0x0000000002D10000-0x0000000002D20000-memory.dmp

        Filesize

        64KB

      • memory/4428-12-0x0000000000400000-0x0000000000683000-memory.dmp

        Filesize

        2.5MB

      • memory/4428-18-0x0000000000400000-0x0000000000683000-memory.dmp

        Filesize

        2.5MB

      • memory/4428-11-0x0000000000400000-0x0000000000683000-memory.dmp

        Filesize

        2.5MB