Resubmissions

21-12-2024 22:57

241221-2xpr2atjar 10

21-12-2024 20:29

241221-y9xfvsyngy 10

Analysis

  • max time kernel
    52s
  • max time network
    90s
  • 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

    0c046f07cd96f008a224dc272c32b52af4611cd1852d38db9737abbe3fcf9e89.exe

  • Size

    229KB

  • MD5

    f8c0a565c50b57b8ebc9c280007312ec

  • SHA1

    e0a90e6d88b92002c7b77dc8298cd1b98f89d99e

  • SHA256

    0c046f07cd96f008a224dc272c32b52af4611cd1852d38db9737abbe3fcf9e89

  • SHA512

    483f609a16c268bfb7626bd6dc7826d8822671342cad1ebdab64115863efe7a75dd13ce6ed31b3c89f691644b2a5d719d43f47994769db2c5753e34bdaedf185

  • SSDEEP

    6144:wf6fRxdLyrc/quEJfylTp45uuo9qcOY7Mnh:wf6fRbGcSuEJfylTp4YuUf

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\0c046f07cd96f008a224dc272c32b52af4611cd1852d38db9737abbe3fcf9e89.exe
    "C:\Users\Admin\AppData\Local\Temp\0c046f07cd96f008a224dc272c32b52af4611cd1852d38db9737abbe3fcf9e89.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4260
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\gepzgbmx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:396
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jzsqnwdc.exe" C:\Windows\SysWOW64\gepzgbmx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4792
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create gepzgbmx binPath= "C:\Windows\SysWOW64\gepzgbmx\jzsqnwdc.exe /d\"C:\Users\Admin\AppData\Local\Temp\0c046f07cd96f008a224dc272c32b52af4611cd1852d38db9737abbe3fcf9e89.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3092
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description gepzgbmx "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4468
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start gepzgbmx
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2628
    • 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:3960
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 4260 -s 688
      2⤵
      • Program crash
      PID:4452
  • C:\Windows\SysWOW64\gepzgbmx\jzsqnwdc.exe
    C:\Windows\SysWOW64\gepzgbmx\jzsqnwdc.exe /d"C:\Users\Admin\AppData\Local\Temp\0c046f07cd96f008a224dc272c32b52af4611cd1852d38db9737abbe3fcf9e89.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3644
    • 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:2924
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3644 -s 536
      2⤵
      • Program crash
      PID:4804
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 4260 -ip 4260
    1⤵
      PID:4316
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 540 -p 3644 -ip 3644
      1⤵
        PID:3888

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        12.7MB

        MD5

        1650596da0c893216956113f46bc5e0c

        SHA1

        76264cdf58f8de4091d42044c79fa1ce89daa5c4

        SHA256

        84a856f5557d5d7bcbef56213cc91bff9d13af5501d5e9c07bf5e2c887f1b247

        SHA512

        f44908db3d7559bfe17af5fa47bf57a7259935ec386a13c72d10c48ce82e2e3bddc8fab6d635a48c7c02e70150e69ab470784d5e505da38eb32c08947c1ec9d9

      • memory/2924-46-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-27-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-24-0x00000000025F0000-0x00000000025F6000-memory.dmp

        Filesize

        24KB

      • memory/2924-44-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-54-0x0000000007E00000-0x000000000820B000-memory.dmp

        Filesize

        4.0MB

      • memory/2924-23-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB

      • memory/2924-30-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-31-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-45-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-32-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-12-0x0000000001040000-0x0000000001055000-memory.dmp

        Filesize

        84KB

      • memory/2924-17-0x0000000001040000-0x0000000001055000-memory.dmp

        Filesize

        84KB

      • memory/2924-21-0x0000000002E00000-0x000000000300F000-memory.dmp

        Filesize

        2.1MB

      • memory/2924-55-0x00000000033F0000-0x00000000033F7000-memory.dmp

        Filesize

        28KB

      • memory/2924-51-0x0000000007E00000-0x000000000820B000-memory.dmp

        Filesize

        4.0MB

      • memory/2924-50-0x00000000033E0000-0x00000000033E5000-memory.dmp

        Filesize

        20KB

      • memory/2924-47-0x00000000033E0000-0x00000000033E5000-memory.dmp

        Filesize

        20KB

      • memory/2924-33-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-15-0x0000000001040000-0x0000000001055000-memory.dmp

        Filesize

        84KB

      • memory/2924-34-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-38-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-42-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-41-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-40-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-39-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-43-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-37-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-36-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/2924-35-0x0000000003110000-0x0000000003120000-memory.dmp

        Filesize

        64KB

      • memory/3644-16-0x0000000000400000-0x0000000000597000-memory.dmp

        Filesize

        1.6MB

      • memory/3644-13-0x0000000000400000-0x0000000000597000-memory.dmp

        Filesize

        1.6MB

      • memory/3644-11-0x0000000000400000-0x0000000000597000-memory.dmp

        Filesize

        1.6MB

      • memory/4260-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4260-1-0x0000000000790000-0x0000000000890000-memory.dmp

        Filesize

        1024KB

      • memory/4260-7-0x0000000000400000-0x0000000000597000-memory.dmp

        Filesize

        1.6MB

      • memory/4260-8-0x0000000002410000-0x0000000002423000-memory.dmp

        Filesize

        76KB

      • memory/4260-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/4260-2-0x0000000002410000-0x0000000002423000-memory.dmp

        Filesize

        76KB