Resubmissions

10-11-2024 21:28

241110-1bhk6avgrr 10

Analysis

  • max time kernel
    1798s
  • max time network
    1841s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-11-2024 02:47

General

  • Target

    0f4450a6b298d95d7fdd6ac63a917b1975221fe90e520ff30e9c6b0d8a4955b6.exe

  • Size

    219KB

  • MD5

    566a30af3032ed8c2718c99a9c0d7289

  • SHA1

    4d08ff905ddfdaf7f39465b9af09b6441e8993d7

  • SHA256

    0f4450a6b298d95d7fdd6ac63a917b1975221fe90e520ff30e9c6b0d8a4955b6

  • SHA512

    03aa457d3d68d96cdcb8a2d234fac21466bac359bc10948ac1b79222361e992d456df8ba89c8c4e0ada87da0502857a3586ed232a114db9823f13d60308526b1

  • SSDEEP

    3072:UXWlLKlKMO5qI0Ac7ztrQNZezyzh91Ih3Az9Mo+ATIulLwt:QQLrM937JUNZeeFTEMuoZTIuh

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.

  • 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
  • Looks up external IP address via web service 1 IoCs

    Uses a legitimate IP lookup service to find the infected system's external IP.

  • 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 19 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0f4450a6b298d95d7fdd6ac63a917b1975221fe90e520ff30e9c6b0d8a4955b6.exe
    "C:\Users\Admin\AppData\Local\Temp\0f4450a6b298d95d7fdd6ac63a917b1975221fe90e520ff30e9c6b0d8a4955b6.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4640
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\smxwuvcm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1868
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iknytncd.exe" C:\Windows\SysWOW64\smxwuvcm\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1896
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create smxwuvcm binPath= "C:\Windows\SysWOW64\smxwuvcm\iknytncd.exe /d\"C:\Users\Admin\AppData\Local\Temp\0f4450a6b298d95d7fdd6ac63a917b1975221fe90e520ff30e9c6b0d8a4955b6.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1824
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description smxwuvcm "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2024
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start smxwuvcm
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:668
    • 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:1680
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4640 -s 1436
      2⤵
      • Program crash
      PID:1012
  • C:\Windows\SysWOW64\smxwuvcm\iknytncd.exe
    C:\Windows\SysWOW64\smxwuvcm\iknytncd.exe /d"C:\Users\Admin\AppData\Local\Temp\0f4450a6b298d95d7fdd6ac63a917b1975221fe90e520ff30e9c6b0d8a4955b6.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4412
    • 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:884
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4412 -s 536
      2⤵
      • Program crash
      PID:4484
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 460 -p 4640 -ip 4640
    1⤵
      PID:5016
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 476 -p 4412 -ip 4412
      1⤵
        PID:2364

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        12.1MB

        MD5

        c584c62f6765ebe2c2e4d766b8272077

        SHA1

        91b11d6cc99bf45c3fc5ce11e0004d5ca4cd6b67

        SHA256

        d6ad7ce078c133e17fc4cbea9cdabb1d8fe403dccdcb98d793842140707d237a

        SHA512

        ff35ec6200033746c25547e9443fc8f6dfee866bafe8b5fdb8640182496e5493d7db4c86c87533f750afe5c75b4ae612c19e1b3cd0cec40fa04f9a3977518475

      • C:\Windows\SysWOW64\config\systemprofile:.repos

        Filesize

        1.2MB

        MD5

        d9a10858e4158e583359a0e4ff6b3c93

        SHA1

        c0aef119e60779192f8691f29353afa6332c1e84

        SHA256

        bce326d045376a7a93f4aa98098cbe5e9769cc371891410e7f373cf95308dddb

        SHA512

        043404f852d5abd137afac32badfb0a2cdbeb654de389129c88c56ea51e4d52ae203fd00ca2d688a475a30c53bd8713fe76a18bfff4f5c23546acd249ac3f522

      • memory/884-43-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-34-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-21-0x00000000023B0000-0x00000000023B6000-memory.dmp

        Filesize

        24KB

      • memory/884-42-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-24-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-11-0x0000000000EC0000-0x0000000000ED5000-memory.dmp

        Filesize

        84KB

      • memory/884-13-0x0000000000EC0000-0x0000000000ED5000-memory.dmp

        Filesize

        84KB

      • memory/884-14-0x0000000000EC0000-0x0000000000ED5000-memory.dmp

        Filesize

        84KB

      • memory/884-27-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-52-0x00000000023E0000-0x00000000023E7000-memory.dmp

        Filesize

        28KB

      • memory/884-20-0x0000000002C00000-0x0000000002E0F000-memory.dmp

        Filesize

        2.1MB

      • memory/884-18-0x0000000002C00000-0x0000000002E0F000-memory.dmp

        Filesize

        2.1MB

      • memory/884-51-0x0000000007C00000-0x000000000800B000-memory.dmp

        Filesize

        4.0MB

      • memory/884-48-0x0000000007C00000-0x000000000800B000-memory.dmp

        Filesize

        4.0MB

      • memory/884-47-0x00000000023D0000-0x00000000023D5000-memory.dmp

        Filesize

        20KB

      • memory/884-44-0x00000000023D0000-0x00000000023D5000-memory.dmp

        Filesize

        20KB

      • memory/884-28-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-29-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-30-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-40-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-39-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-38-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-37-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-36-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-35-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-41-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-33-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-32-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/884-31-0x00000000023C0000-0x00000000023D0000-memory.dmp

        Filesize

        64KB

      • memory/4412-15-0x0000000000400000-0x0000000002C25000-memory.dmp

        Filesize

        40.1MB

      • memory/4640-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4640-9-0x0000000002C40000-0x0000000002C53000-memory.dmp

        Filesize

        76KB

      • memory/4640-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4640-8-0x0000000000400000-0x0000000002C25000-memory.dmp

        Filesize

        40.1MB

      • memory/4640-1-0x0000000002CC0000-0x0000000002DC0000-memory.dmp

        Filesize

        1024KB

      • memory/4640-2-0x0000000002C40000-0x0000000002C53000-memory.dmp

        Filesize

        76KB