Resubmissions

21-12-2024 22:57

241221-2xpr2atjar 10

21-12-2024 20:29

241221-y9xfvsyngy 10

Analysis

  • max time kernel
    56s
  • max time network
    96s
  • platform
    windows11-21h2_x64
  • resource
    win11-20241007-en
  • resource tags

    arch:x64arch:x86image:win11-20241007-enlocale:en-usos:windows11-21h2-x64system
  • submitted
    21-12-2024 22:57

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
  • 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\0f4450a6b298d95d7fdd6ac63a917b1975221fe90e520ff30e9c6b0d8a4955b6.exe
    "C:\Users\Admin\AppData\Local\Temp\0f4450a6b298d95d7fdd6ac63a917b1975221fe90e520ff30e9c6b0d8a4955b6.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2780
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hpjyokqf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1468
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\coxlkgpu.exe" C:\Windows\SysWOW64\hpjyokqf\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4568
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create hpjyokqf binPath= "C:\Windows\SysWOW64\hpjyokqf\coxlkgpu.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:4508
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description hpjyokqf "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3944
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start hpjyokqf
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4868
    • 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:2644
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2780 -s 688
      2⤵
      • Program crash
      PID:1404
  • C:\Windows\SysWOW64\hpjyokqf\coxlkgpu.exe
    C:\Windows\SysWOW64\hpjyokqf\coxlkgpu.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:1856
    • 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:5112
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1856 -s 568
      2⤵
      • Program crash
      PID:2368
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 448 -p 2780 -ip 2780
    1⤵
      PID:3544
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 552 -p 1856 -ip 1856
      1⤵
        PID:424

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        12.0MB

        MD5

        f817b6d8968319b32110886dfc8423c3

        SHA1

        2e605af6f879ac9d102b927e8dc1a38154cd1c56

        SHA256

        ebe079b78cf8afe7b4dd38265aa12017b944b408e22709137314d9618d36ded9

        SHA512

        c9ddee4dad4cfe3317f728ed47512f1dce8765b90f92455c4f5f36d7f26595e387ff249493a81328e532cc081dffc9158d732b90d6c224d2768b8ee506878b3c

      • memory/1856-15-0x0000000000400000-0x0000000002C25000-memory.dmp

        Filesize

        40.1MB

      • memory/2780-2-0x0000000002E50000-0x0000000002E63000-memory.dmp

        Filesize

        76KB

      • memory/2780-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2780-10-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2780-9-0x0000000002E50000-0x0000000002E63000-memory.dmp

        Filesize

        76KB

      • memory/2780-8-0x0000000000400000-0x0000000002C25000-memory.dmp

        Filesize

        40.1MB

      • memory/2780-1-0x0000000002E70000-0x0000000002F70000-memory.dmp

        Filesize

        1024KB

      • memory/5112-44-0x00000000025F0000-0x00000000025F5000-memory.dmp

        Filesize

        20KB

      • memory/5112-39-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-13-0x0000000001060000-0x0000000001075000-memory.dmp

        Filesize

        84KB

      • memory/5112-30-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-18-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB

      • memory/5112-21-0x00000000025D0000-0x00000000025D6000-memory.dmp

        Filesize

        24KB

      • memory/5112-51-0x0000000007E40000-0x000000000824B000-memory.dmp

        Filesize

        4.0MB

      • memory/5112-52-0x00000000033D0000-0x00000000033D7000-memory.dmp

        Filesize

        28KB

      • memory/5112-48-0x0000000007E40000-0x000000000824B000-memory.dmp

        Filesize

        4.0MB

      • memory/5112-47-0x00000000025F0000-0x00000000025F5000-memory.dmp

        Filesize

        20KB

      • memory/5112-11-0x0000000001060000-0x0000000001075000-memory.dmp

        Filesize

        84KB

      • memory/5112-43-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-42-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-41-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-40-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-14-0x0000000001060000-0x0000000001075000-memory.dmp

        Filesize

        84KB

      • memory/5112-38-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-37-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-36-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-35-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-34-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-33-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-32-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-31-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-29-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-28-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-27-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-24-0x00000000025E0000-0x00000000025F0000-memory.dmp

        Filesize

        64KB

      • memory/5112-20-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB