Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows11-21h2_x64
  • resource
    win11-20240802-en
  • resource tags

    arch:x64arch:x86image:win11-20240802-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    04-09-2024 20:03

General

  • Target

    1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe

  • Size

    213KB

  • MD5

    f9ad5be234e6344809c7ff448e159a7d

  • SHA1

    0415a25b3d0a26fdc3f860abbbc1ffc02524aed4

  • SHA256

    1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc

  • SHA512

    aefd78cd2dfe9bb61fa08cf80959b83ce8c14dcb6ff9230b8386b1e04965bec63bb4c4b5c2446990e3d6ec10963255b4bc34e280af22cc27bee653365f0cb3c5

  • SSDEEP

    3072:0ASCGfSRnbJBJyvE3gCD5aYTGnfH7g9aHlfwR+9pbQ:wfSRnbJBJywgFYTutoRE

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
  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe
    "C:\Users\Admin\AppData\Local\Temp\1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4664
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\iyvfoecy\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1492
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jqtonhhb.exe" C:\Windows\SysWOW64\iyvfoecy\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3116
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create iyvfoecy binPath= "C:\Windows\SysWOW64\iyvfoecy\jqtonhhb.exe /d\"C:\Users\Admin\AppData\Local\Temp\1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2112
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description iyvfoecy "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:420
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start iyvfoecy
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3184
    • 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:1464
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4664 -s 692
      2⤵
      • Program crash
      PID:484
  • C:\Windows\SysWOW64\iyvfoecy\jqtonhhb.exe
    C:\Windows\SysWOW64\iyvfoecy\jqtonhhb.exe /d"C:\Users\Admin\AppData\Local\Temp\1b2c0acd5d2ba3645ad133e9a9ca7794343557c590225a1a400d8fcfe3bdf9cc.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:668
    • 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:3460
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 668 -s 556
      2⤵
      • Program crash
      PID:4880
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 4664 -ip 4664
    1⤵
      PID:1328
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 668 -ip 668
      1⤵
        PID:2028

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        12.1MB

        MD5

        44d3fdd65906769db314b6aeceff4946

        SHA1

        a4e4b4e702766152db90712c570c942707d6892b

        SHA256

        2787d0b6b4eb384f8ef08081c85ce8dd53eb55da64d9ca570275e4a8798cac39

        SHA512

        7e9c431ab075ad1f8adc70b3d7596bc523f0ee7b9edd6411efffbb0dee7fa807f73d2fbb4a38b7cfbcf4cd48ada063f652fbe017a25fcab2e8e5174f755d8e2c

      • memory/668-15-0x0000000000400000-0x000000000043C000-memory.dmp

        Filesize

        240KB

      • memory/3460-41-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-32-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-51-0x0000000007F80000-0x000000000838B000-memory.dmp

        Filesize

        4.0MB

      • memory/3460-40-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-21-0x0000000002760000-0x0000000002766000-memory.dmp

        Filesize

        24KB

      • memory/3460-39-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-13-0x00000000012F0000-0x0000000001305000-memory.dmp

        Filesize

        84KB

      • memory/3460-14-0x00000000012F0000-0x0000000001305000-memory.dmp

        Filesize

        84KB

      • memory/3460-24-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-18-0x0000000003000000-0x000000000320F000-memory.dmp

        Filesize

        2.1MB

      • memory/3460-48-0x0000000007F80000-0x000000000838B000-memory.dmp

        Filesize

        4.0MB

      • memory/3460-52-0x00000000035E0000-0x00000000035E7000-memory.dmp

        Filesize

        28KB

      • memory/3460-47-0x00000000035D0000-0x00000000035D5000-memory.dmp

        Filesize

        20KB

      • memory/3460-44-0x00000000035D0000-0x00000000035D5000-memory.dmp

        Filesize

        20KB

      • memory/3460-43-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-42-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-20-0x0000000003000000-0x000000000320F000-memory.dmp

        Filesize

        2.1MB

      • memory/3460-27-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-11-0x00000000012F0000-0x0000000001305000-memory.dmp

        Filesize

        84KB

      • memory/3460-38-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-37-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-36-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-35-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-34-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-33-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-28-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-31-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-30-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/3460-29-0x0000000002770000-0x0000000002780000-memory.dmp

        Filesize

        64KB

      • memory/4664-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4664-8-0x0000000002280000-0x0000000002293000-memory.dmp

        Filesize

        76KB

      • memory/4664-2-0x0000000002280000-0x0000000002293000-memory.dmp

        Filesize

        76KB

      • memory/4664-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4664-1-0x0000000000520000-0x0000000000620000-memory.dmp

        Filesize

        1024KB

      • memory/4664-7-0x0000000000400000-0x000000000043C000-memory.dmp

        Filesize

        240KB