Analysis

  • max time kernel
    148s
  • max time network
    145s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    03-09-2024 01:03

General

  • Target

    02c6f9163a5d988cee3ab12c11e03b18329c26d6b4863004f943133654693e97.exe

  • Size

    213KB

  • MD5

    a3247152e18ba6e88311f082a86515d3

  • SHA1

    80da2f14bb17f2d3ff1df6faf25622ebb8cf00c8

  • SHA256

    02c6f9163a5d988cee3ab12c11e03b18329c26d6b4863004f943133654693e97

  • SHA512

    b09fc49d7126b37c37f499be522c4b57e7538d2f64600bd789c93d90a315a023f0fbed9466c6069a38bb8c80bc9a6b250fcaec03b59ecfb3a40754c235c3e6d8

  • SSDEEP

    3072:AOFL8HN3BB33u/iMUk6efofpWqX2hnesi5kb:tLqN3Bt36iM/ofpKhn9

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.

  • Windows security bypass 2 TTPs 1 IoCs
  • 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.

  • 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 7 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\02c6f9163a5d988cee3ab12c11e03b18329c26d6b4863004f943133654693e97.exe
    "C:\Users\Admin\AppData\Local\Temp\02c6f9163a5d988cee3ab12c11e03b18329c26d6b4863004f943133654693e97.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2792
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lufjyokc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2380
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vhxkyxpt.exe" C:\Windows\SysWOW64\lufjyokc\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2848
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create lufjyokc binPath= "C:\Windows\SysWOW64\lufjyokc\vhxkyxpt.exe /d\"C:\Users\Admin\AppData\Local\Temp\02c6f9163a5d988cee3ab12c11e03b18329c26d6b4863004f943133654693e97.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2732
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description lufjyokc "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2740
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start lufjyokc
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2604
    • 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:3032
  • C:\Windows\SysWOW64\lufjyokc\vhxkyxpt.exe
    C:\Windows\SysWOW64\lufjyokc\vhxkyxpt.exe /d"C:\Users\Admin\AppData\Local\Temp\02c6f9163a5d988cee3ab12c11e03b18329c26d6b4863004f943133654693e97.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2736
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • 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:636

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.2MB

    MD5

    f7c1b3f14e3bb5e8644780e419e1c68e

    SHA1

    f750b36e31f2f68160e0345282c336bade97478f

    SHA256

    6a18e04d664037843975ed592305d8dfea78840fa27f517d9fcef597df5db603

    SHA512

    bae1fd5a890f7ce5139e56c788b5e68ac43f6b99406ecd67ceccf9417de4c7a77dffc7f444f61d40bb15eb6f4675d8bba5f3022ac663b75716c293aa985643f3

  • memory/636-45-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-23-0x00000000017D0000-0x00000000019DF000-memory.dmp

    Filesize

    2.1MB

  • memory/636-54-0x0000000005440000-0x000000000584B000-memory.dmp

    Filesize

    4.0MB

  • memory/636-51-0x0000000005440000-0x000000000584B000-memory.dmp

    Filesize

    4.0MB

  • memory/636-44-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/636-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/636-27-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/636-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/636-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/636-20-0x00000000017D0000-0x00000000019DF000-memory.dmp

    Filesize

    2.1MB

  • memory/636-24-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/636-37-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-50-0x0000000000110000-0x0000000000115000-memory.dmp

    Filesize

    20KB

  • memory/636-47-0x0000000000110000-0x0000000000115000-memory.dmp

    Filesize

    20KB

  • memory/636-46-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-30-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-31-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-32-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-43-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-55-0x0000000000240000-0x0000000000247000-memory.dmp

    Filesize

    28KB

  • memory/636-42-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-41-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-40-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-39-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-38-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-36-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-35-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-34-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/636-33-0x00000000000F0000-0x0000000000100000-memory.dmp

    Filesize

    64KB

  • memory/2736-17-0x0000000000400000-0x0000000000448000-memory.dmp

    Filesize

    288KB

  • memory/2792-3-0x0000000000400000-0x0000000000448000-memory.dmp

    Filesize

    288KB

  • memory/2792-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2792-1-0x0000000000290000-0x0000000000390000-memory.dmp

    Filesize

    1024KB

  • memory/2792-8-0x0000000000400000-0x0000000000448000-memory.dmp

    Filesize

    288KB

  • memory/2792-2-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB