Analysis

  • max time kernel
    150s
  • max time network
    152s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    04/09/2024, 01:53

General

  • Target

    8777baf9f5a68be1faf17fa6f7c5ab3de0113392784cc150b822b7db5426e380.exe

  • Size

    11.2MB

  • MD5

    3482cbbb23d7548633dde35f128ea40a

  • SHA1

    b8cba7389b8e195b30ceb2e1a2b1d1fd6129adbd

  • SHA256

    8777baf9f5a68be1faf17fa6f7c5ab3de0113392784cc150b822b7db5426e380

  • SHA512

    db334c6aae52045ff3ce7597f172cce21f5a3a61a85b8dd4c5517eac649b60e429df968e1538c99080449d0ebfb5d8e917cb43bfa105e27d0a790ca2463748c7

  • SSDEEP

    6144:Oc6OZDisWsD0Td2HJxO+m8PuG1R4WnWjrsaz:O1OZDisvwdaxO0PuG1R4CWs

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 5 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\8777baf9f5a68be1faf17fa6f7c5ab3de0113392784cc150b822b7db5426e380.exe
    "C:\Users\Admin\AppData\Local\Temp\8777baf9f5a68be1faf17fa6f7c5ab3de0113392784cc150b822b7db5426e380.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2060
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lcwlwhiz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2260
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\gpvgetl.exe" C:\Windows\SysWOW64\lcwlwhiz\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3056
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create lcwlwhiz binPath= "C:\Windows\SysWOW64\lcwlwhiz\gpvgetl.exe /d\"C:\Users\Admin\AppData\Local\Temp\8777baf9f5a68be1faf17fa6f7c5ab3de0113392784cc150b822b7db5426e380.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2768
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description lcwlwhiz "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2692
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start lcwlwhiz
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2840
    • 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:2744
  • C:\Windows\SysWOW64\lcwlwhiz\gpvgetl.exe
    C:\Windows\SysWOW64\lcwlwhiz\gpvgetl.exe /d"C:\Users\Admin\AppData\Local\Temp\8777baf9f5a68be1faf17fa6f7c5ab3de0113392784cc150b822b7db5426e380.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2892
    • 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:2876

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.3MB

    MD5

    cac11fde48914534e73b5a284e76d6e8

    SHA1

    db9b06d7808437b18f4c8ffab8db5bd694e04abd

    SHA256

    edd44154b4da01e7d1622e44598f2b254f3d4d917c030d40c38756b74991c1ce

    SHA512

    e7d11ce065bf8468b7c6c685b771ec3fff2f55cef9622153b431896a6dbf9e8ffb43da8d6c8c8979d4ac9914f00e1587aea7febe25291e782debced44de88b99

  • memory/2060-17-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2060-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2060-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2060-1-0x00000000006B0000-0x00000000007B0000-memory.dmp

    Filesize

    1024KB

  • memory/2060-14-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB

  • memory/2060-16-0x00000000006B0000-0x00000000007B0000-memory.dmp

    Filesize

    1024KB

  • memory/2060-15-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2876-55-0x00000000055D0000-0x00000000059DB000-memory.dmp

    Filesize

    4.0MB

  • memory/2876-48-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/2876-8-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2876-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2876-18-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2876-19-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2876-21-0x00000000019F0000-0x0000000001BFF000-memory.dmp

    Filesize

    2.1MB

  • memory/2876-28-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-25-0x0000000000080000-0x0000000000086000-memory.dmp

    Filesize

    24KB

  • memory/2876-24-0x00000000019F0000-0x0000000001BFF000-memory.dmp

    Filesize

    2.1MB

  • memory/2876-43-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-51-0x0000000000170000-0x0000000000175000-memory.dmp

    Filesize

    20KB

  • memory/2876-11-0x00000000000D0000-0x00000000000E5000-memory.dmp

    Filesize

    84KB

  • memory/2876-56-0x00000000001D0000-0x00000000001D7000-memory.dmp

    Filesize

    28KB

  • memory/2876-52-0x00000000055D0000-0x00000000059DB000-memory.dmp

    Filesize

    4.0MB

  • memory/2876-31-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-47-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-46-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-45-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-44-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-42-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-41-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-40-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-39-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-38-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-37-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-36-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-35-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-34-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-33-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2876-32-0x0000000000160000-0x0000000000170000-memory.dmp

    Filesize

    64KB

  • memory/2892-13-0x0000000000400000-0x00000000005FE000-memory.dmp

    Filesize

    2.0MB