Analysis

  • max time kernel
    145s
  • max time network
    146s
  • platform
    windows7_x64
  • resource
    win7-20240708-en
  • resource tags

    arch:x64arch:x86image:win7-20240708-enlocale:en-usos:windows7-x64system
  • submitted
    30-08-2024 23:46

General

  • Target

    3a115fc118d5b0933c8550da6125b78d4956e27f671c00945d0ad04d5839dab4.exe

  • Size

    10.9MB

  • MD5

    2f0b4b4819d48ff7ba4dbeb258a93189

  • SHA1

    98067909fa21b0bf107449206405ac8b13e5c776

  • SHA256

    3a115fc118d5b0933c8550da6125b78d4956e27f671c00945d0ad04d5839dab4

  • SHA512

    090e957459548ed42424f07cb387664bff76d0efcc5b36943339b909290696496738c0b4586f446df4f6c0f1aa4faccb6ad66aab404a8775e7146491b4cd16e1

  • SSDEEP

    6144:HLmhaXrxJHCx7HdqAT7mvs/bNAk3B79NmVVVVVVVVVVVVVVVVVVVVVVVVVVVVVV1:HLmhaXrxJHuHdPT1n9N

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\3a115fc118d5b0933c8550da6125b78d4956e27f671c00945d0ad04d5839dab4.exe
    "C:\Users\Admin\AppData\Local\Temp\3a115fc118d5b0933c8550da6125b78d4956e27f671c00945d0ad04d5839dab4.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2148
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\tieyjogg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2208
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ybzuovfp.exe" C:\Windows\SysWOW64\tieyjogg\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1464
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create tieyjogg binPath= "C:\Windows\SysWOW64\tieyjogg\ybzuovfp.exe /d\"C:\Users\Admin\AppData\Local\Temp\3a115fc118d5b0933c8550da6125b78d4956e27f671c00945d0ad04d5839dab4.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3028
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description tieyjogg "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 tieyjogg
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3008
    • 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:2648
  • C:\Windows\SysWOW64\tieyjogg\ybzuovfp.exe
    C:\Windows\SysWOW64\tieyjogg\ybzuovfp.exe /d"C:\Users\Admin\AppData\Local\Temp\3a115fc118d5b0933c8550da6125b78d4956e27f671c00945d0ad04d5839dab4.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3020
    • 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:2696

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    11.8MB

    MD5

    c10226aa49b207cca5c5126185863b40

    SHA1

    678cf5a4374b6c8374ae2cd906a1cfdc696cbfa2

    SHA256

    b1ac9e5e9220eaee866e9090ee699f0c143374c5178acc223fc0ad2ab383d12c

    SHA512

    38fd7895cc0dc397252e89739bc74038a16d770b60befeeef90b5fc8f6b2ab2cc3f4c1fc35916e412dde8d5c11d25da3ff5245010277966b65bc3a57f732cf6a

  • memory/2148-9-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2148-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2148-2-0x0000000000020000-0x0000000000033000-memory.dmp

    Filesize

    76KB

  • memory/2148-10-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2148-8-0x0000000000400000-0x0000000000878000-memory.dmp

    Filesize

    4.5MB

  • memory/2148-1-0x00000000002B0000-0x00000000003B0000-memory.dmp

    Filesize

    1024KB

  • memory/2696-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2696-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2696-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3020-16-0x0000000000400000-0x0000000000878000-memory.dmp

    Filesize

    4.5MB