Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    03-09-2024 16:39

General

  • Target

    25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe

  • Size

    14.7MB

  • MD5

    ea6b8a444ac84e9af4e879ce16c37ff2

  • SHA1

    8aa368fbb8702c4e23e0ea8066efb4b4f6ab93c0

  • SHA256

    25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605

  • SHA512

    dff566b5e453b332388c0657de12cec1d0da88dd48542825e8bb3ee340176b91bc662451a622349e16d1b20f0eb1b23d7681185d9e6556e790f5b6c975d1fd48

  • SSDEEP

    12288:iz+wSUpBMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMMU:iz8

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Creates new service(s) 2 TTPs
  • Modifies Windows Firewall 2 TTPs 1 IoCs
  • Sets service image path in registry 2 TTPs 1 IoCs
  • Checks computer location settings 2 TTPs 1 IoCs

    Looks up country code configured in the registry, likely geofence.

  • 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 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe
    "C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:400
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\ylobhbgx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2752
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\iyexygwf.exe" C:\Windows\SysWOW64\ylobhbgx\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4668
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create ylobhbgx binPath= "C:\Windows\SysWOW64\ylobhbgx\iyexygwf.exe /d\"C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3504
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description ylobhbgx "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3160
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start ylobhbgx
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2648
    • 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:656
  • C:\Windows\SysWOW64\ylobhbgx\iyexygwf.exe
    C:\Windows\SysWOW64\ylobhbgx\iyexygwf.exe /d"C:\Users\Admin\AppData\Local\Temp\25b5562d7367c5d6b3ba1e972f7dc163d8a420f828f517f6f7d12eb0ba503605.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3972
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • Sets service image path in registry
      • Deletes itself
      • System Location Discovery: System Language Discovery
      PID:4720

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.8MB

    MD5

    6264b9960713188c03593e6e8aa70588

    SHA1

    c7ba29c513b37756a79c098af791faeb760cc16a

    SHA256

    b1c3b3e7d7dc2403c9aee2f9d8a9ad810b0f1e41e33d7083cba613a3c3dbb0a3

    SHA512

    7836d57452998e1962b1d3e1477eba38624da028ab8862a9a7d572e8b6770f87f94e6a0ffd87b12dd6b055dc3584867da3af9f82ec9b2260f9acff10136a0a17

  • memory/400-0-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/400-1-0x00000000006D0000-0x00000000006D1000-memory.dmp

    Filesize

    4KB

  • memory/400-3-0x00000000006E0000-0x00000000006E1000-memory.dmp

    Filesize

    4KB

  • memory/400-2-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/400-19-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/3972-8-0x0000000000460000-0x0000000000461000-memory.dmp

    Filesize

    4KB

  • memory/3972-13-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/3972-12-0x000000005F000000-0x000000005F011000-memory.dmp

    Filesize

    68KB

  • memory/3972-7-0x0000000000400000-0x000000000041E000-memory.dmp

    Filesize

    120KB

  • memory/4720-10-0x0000000000160000-0x0000000000175000-memory.dmp

    Filesize

    84KB

  • memory/4720-16-0x0000000000160000-0x0000000000175000-memory.dmp

    Filesize

    84KB

  • memory/4720-20-0x0000000000160000-0x0000000000175000-memory.dmp

    Filesize

    84KB

  • memory/4720-21-0x0000000000160000-0x0000000000175000-memory.dmp

    Filesize

    84KB

  • memory/4720-22-0x0000000000160000-0x0000000000175000-memory.dmp

    Filesize

    84KB