Analysis

  • max time kernel
    146s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    31-08-2024 15:23

General

  • Target

    f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe

  • Size

    14.1MB

  • MD5

    c60a9d97501c8fccb7ce37b52654839b

  • SHA1

    94fc047b6307fd89d39eaad454db89dc1d0809c4

  • SHA256

    f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02

  • SHA512

    5254c7f7f7164e27408bdaefe28b948a0b61e576161bd92d0aecefc7b327687e2f10c80ded601fbcfd0d799d887c4b3895e251d3db0a9ef50b3a58086a53ac45

  • SSDEEP

    12288:R0Xz1CuwA5Rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rp0rpZ:R0X2

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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
  • 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.

  • Suspicious use of WriteProcessMemory 30 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe
    "C:\Users\Admin\AppData\Local\Temp\f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2488
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\zisddkvo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2060
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\tyumknz.exe" C:\Windows\SysWOW64\zisddkvo\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2948
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create zisddkvo binPath= "C:\Windows\SysWOW64\zisddkvo\tyumknz.exe /d\"C:\Users\Admin\AppData\Local\Temp\f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1464
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description zisddkvo "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2260
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start zisddkvo
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1284
    • 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:2752
  • C:\Windows\SysWOW64\zisddkvo\tyumknz.exe
    C:\Windows\SysWOW64\zisddkvo\tyumknz.exe /d"C:\Users\Admin\AppData\Local\Temp\f06f8570f6999f01ade88f2c09538759e55539eb7c2d452999e1c66ca83e8c02.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2692
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Windows security bypass
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:2668

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.8MB

    MD5

    f6617608cfc6d29c9c54e58e60a3a7e5

    SHA1

    fabd105b2e48ce804c5cf5c240c942e1877ed607

    SHA256

    d5282c622568cdea0bb2c20ca25c72ef692bb533c724f3a52167e82e2dc920ce

    SHA512

    2ace2a043e9a0d7b09a75a2e70d341f2048eec868ca0e585de1ecc0b598bcfff0052200f91b1303d5124fa443270dbc28affad75a11e7c1e8dc89fc1bd004a97

  • memory/2488-8-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB

  • memory/2488-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2488-2-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2488-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2488-9-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2488-1-0x0000000000530000-0x0000000000630000-memory.dmp

    Filesize

    1024KB

  • memory/2668-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2668-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2668-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2668-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2668-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2692-17-0x0000000000400000-0x0000000000441000-memory.dmp

    Filesize

    260KB