Resubmissions

10-11-2024 21:28

241110-1bhk6avgrr 10

Analysis

  • max time kernel
    145s
  • max time network
    176s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • submitted
    10-11-2024 21:28

General

  • Target

    0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe

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
  • 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\0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe
    "C:\Users\Admin\AppData\Local\Temp\0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2704
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kbmzxhai\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2940
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kqixcvm.exe" C:\Windows\SysWOW64\kbmzxhai\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2564
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create kbmzxhai binPath= "C:\Windows\SysWOW64\kbmzxhai\kqixcvm.exe /d\"C:\Users\Admin\AppData\Local\Temp\0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2788
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description kbmzxhai "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2748
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start kbmzxhai
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2568
    • 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:2196
  • C:\Windows\SysWOW64\kbmzxhai\kqixcvm.exe
    C:\Windows\SysWOW64\kbmzxhai\kqixcvm.exe /d"C:\Users\Admin\AppData\Local\Temp\0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2608
    • 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:736

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.9MB

    MD5

    9715c2d5e758285650366ea393190136

    SHA1

    547195789a7a1f650b1884ad913750d49e723858

    SHA256

    1f9325e5ba77ba071d90c11c27f617ceddc7eb5651efa9e75089768361c83794

    SHA512

    9782fc7a85c92e1c861f8d0b46f8e670d4d7ed22cbadcee5f355812ffff9ed8e66d2c66126d3db6edc4d3b32e28f6c81c9110da6aa8580ed95e2d532e0199397

  • memory/736-47-0x00000000001D0000-0x00000000001D5000-memory.dmp

    Filesize

    20KB

  • memory/736-36-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-23-0x0000000001D10000-0x0000000001F1F000-memory.dmp

    Filesize

    2.1MB

  • memory/736-45-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-27-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-30-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/736-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/736-46-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/736-31-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/736-20-0x0000000001D10000-0x0000000001F1F000-memory.dmp

    Filesize

    2.1MB

  • memory/736-55-0x00000000001E0000-0x00000000001E7000-memory.dmp

    Filesize

    28KB

  • memory/736-54-0x00000000057A0000-0x0000000005BAB000-memory.dmp

    Filesize

    4.0MB

  • memory/736-51-0x00000000057A0000-0x0000000005BAB000-memory.dmp

    Filesize

    4.0MB

  • memory/736-50-0x00000000001D0000-0x00000000001D5000-memory.dmp

    Filesize

    20KB

  • memory/736-32-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/736-24-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/736-39-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-43-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-42-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-41-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-40-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-44-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-38-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-37-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-33-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-35-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/736-34-0x00000000000C0000-0x00000000000D0000-memory.dmp

    Filesize

    64KB

  • memory/2608-17-0x0000000000400000-0x0000000000595000-memory.dmp

    Filesize

    1.6MB

  • memory/2704-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2704-1-0x0000000000680000-0x0000000000780000-memory.dmp

    Filesize

    1024KB

  • memory/2704-7-0x0000000000400000-0x0000000000595000-memory.dmp

    Filesize

    1.6MB

  • memory/2704-8-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB

  • memory/2704-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2704-2-0x0000000000220000-0x0000000000233000-memory.dmp

    Filesize

    76KB