Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240729-en
  • resource tags

    arch:x64arch:x86image:win7-20240729-enlocale:en-usos:windows7-x64system
  • submitted
    17-09-2024 10:45

General

  • Target

    369daa4e1bc4ec94f390bfaa316ebfa85ba5538c4e869030e63957c827fbcb94-dropped.exe

  • Size

    11.8MB

  • MD5

    af9f5adf151afef5a8c8378e1ea0799d

  • SHA1

    69ec980d31caf71bdc12cdc1f30bcb92c110a523

  • SHA256

    369daa4e1bc4ec94f390bfaa316ebfa85ba5538c4e869030e63957c827fbcb94

  • SHA512

    c80c35c561a64e82bd7388e1d64e95cf8bdc282869a5daa1d051dbdae613c982be341236114a6efd2769f0f3ef98aaeeba1b3bc489a2222fc72d3d282270d533

  • SSDEEP

    12288:ptfqkWH3ZIQqcggggggggggggggggggggggggggggggggggggggggggggggggggw:pY1HpLq

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.

  • 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 6 IoCs
  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\369daa4e1bc4ec94f390bfaa316ebfa85ba5538c4e869030e63957c827fbcb94-dropped.exe
    "C:\Users\Admin\AppData\Local\Temp\369daa4e1bc4ec94f390bfaa316ebfa85ba5538c4e869030e63957c827fbcb94-dropped.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2520
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rtcscyem\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2328
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\jzkoaiox.exe" C:\Windows\SysWOW64\rtcscyem\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2224
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create rtcscyem binPath= "C:\Windows\SysWOW64\rtcscyem\jzkoaiox.exe /d\"C:\Users\Admin\AppData\Local\Temp\369daa4e1bc4ec94f390bfaa316ebfa85ba5538c4e869030e63957c827fbcb94-dropped.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2156
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description rtcscyem "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2744
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start rtcscyem
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2956
    • 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:2772
  • C:\Windows\SysWOW64\rtcscyem\jzkoaiox.exe
    C:\Windows\SysWOW64\rtcscyem\jzkoaiox.exe /d"C:\Users\Admin\AppData\Local\Temp\369daa4e1bc4ec94f390bfaa316ebfa85ba5538c4e869030e63957c827fbcb94-dropped.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2832
    • 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:2756

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    14.5MB

    MD5

    37832173da5f27751c3e6ceed1634e04

    SHA1

    30b4fa7e7436739c11de9ff6fd6e73bdb0225eee

    SHA256

    7e0c371ff04e1b3c8674fbbf7e26bacbb7b124700ed6a474872a1ce780fe4342

    SHA512

    3192352e4f379e4bd66c63c16861160b0dff823263134392253f476cc927261e79f0fab813615e48a9c299a31dc1c495e022234cf0710f191dcb7d381c49e62d

  • memory/2520-7-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB

  • memory/2520-2-0x0000000000230000-0x0000000000243000-memory.dmp

    Filesize

    76KB

  • memory/2520-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2520-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2520-8-0x0000000000230000-0x0000000000243000-memory.dmp

    Filesize

    76KB

  • memory/2520-1-0x0000000002DD0000-0x0000000002ED0000-memory.dmp

    Filesize

    1024KB

  • memory/2756-51-0x0000000005790000-0x0000000005B9B000-memory.dmp

    Filesize

    4.0MB

  • memory/2756-46-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2756-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2756-23-0x0000000001BD0000-0x0000000001DDF000-memory.dmp

    Filesize

    2.1MB

  • memory/2756-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2756-20-0x0000000001BD0000-0x0000000001DDF000-memory.dmp

    Filesize

    2.1MB

  • memory/2756-27-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-24-0x00000000000A0000-0x00000000000A6000-memory.dmp

    Filesize

    24KB

  • memory/2756-31-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-54-0x0000000005790000-0x0000000005B9B000-memory.dmp

    Filesize

    4.0MB

  • memory/2756-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2756-55-0x00000000001C0000-0x00000000001C7000-memory.dmp

    Filesize

    28KB

  • memory/2756-50-0x00000000001B0000-0x00000000001B5000-memory.dmp

    Filesize

    20KB

  • memory/2756-47-0x00000000001B0000-0x00000000001B5000-memory.dmp

    Filesize

    20KB

  • memory/2756-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2756-45-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-44-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-43-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-42-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-41-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-40-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-39-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-38-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-37-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-36-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-35-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-34-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-33-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-32-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2756-30-0x00000000001A0000-0x00000000001B0000-memory.dmp

    Filesize

    64KB

  • memory/2832-17-0x0000000000400000-0x0000000002C6C000-memory.dmp

    Filesize

    40.4MB