Analysis

  • max time kernel
    150s
  • max time network
    150s
  • platform
    windows7_x64
  • resource
    win7-20240704-en
  • resource tags

    arch:x64arch:x86image:win7-20240704-enlocale:en-usos:windows7-x64system
  • submitted
    21-09-2024 21:31

General

  • Target

    2IFYYPRUgO.exe

  • Size

    447KB

  • MD5

    dd9983e56e44b300e97fbead17bbb8ec

  • SHA1

    bcfc4f542d1824b23b5beefe94e8eaa9d487e037

  • SHA256

    16c9a4debb518681ece83ec9f4eb3edfab08cc4231243db1949a64c80e017aa4

  • SHA512

    02663157f5a109a122897fb0ac32eda38a9ed5d289b70ef1541e3ca800e02a41d471879e04d1bd59eb2110e4a0f8cd7851e3bacba04147ffa488997e8a100457

  • SSDEEP

    6144:XZBpoyz+AlKudZ10mVtZ4ELIgjdo7d5UNo4MaGSlrLo5FXCnFk:Xruyz+PMZ10mVrLL/27gWxerCSC

Malware Config

Extracted

Family

tofsee

C2

vanaheim.cn

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\2IFYYPRUgO.exe
    "C:\Users\Admin\AppData\Local\Temp\2IFYYPRUgO.exe"
    1⤵
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2172
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\visjioli\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1240
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\smmehrvh.exe" C:\Windows\SysWOW64\visjioli\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1232
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create visjioli binPath= "C:\Windows\SysWOW64\visjioli\smmehrvh.exe /d\"C:\Users\Admin\AppData\Local\Temp\2IFYYPRUgO.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2040
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description visjioli "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2340
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start visjioli
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:264
    • 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:2872
  • C:\Windows\SysWOW64\visjioli\smmehrvh.exe
    C:\Windows\SysWOW64\visjioli\smmehrvh.exe /d"C:\Users\Admin\AppData\Local\Temp\2IFYYPRUgO.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2768
    • 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:3036

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    13.7MB

    MD5

    a55ce6da03e8c8d33f5fbc378d553054

    SHA1

    e6d20b374498308d5a1babd42b8b14526504f643

    SHA256

    195f171362e94c1846b0a6a8a368ee09599c069542ce6162e898f05d6d12cda5

    SHA512

    13976e704d1cd3d1fcdd13fb69a43708f7cec1b4f19e05cbb0fe489e7f03ff7fac908e2d30d8431e04d01ab2854de27f3d061adbc3e69ff322bd9bf14df9b092

  • memory/2172-2-0x0000000000250000-0x0000000000263000-memory.dmp

    Filesize

    76KB

  • memory/2172-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2172-9-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2172-8-0x0000000000250000-0x0000000000263000-memory.dmp

    Filesize

    76KB

  • memory/2172-7-0x0000000000400000-0x0000000002488000-memory.dmp

    Filesize

    32.5MB

  • memory/2172-1-0x0000000000270000-0x0000000000370000-memory.dmp

    Filesize

    1024KB

  • memory/2768-17-0x0000000000400000-0x0000000002488000-memory.dmp

    Filesize

    32.5MB

  • memory/3036-54-0x0000000005450000-0x000000000585B000-memory.dmp

    Filesize

    4.0MB

  • memory/3036-44-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3036-16-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3036-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3036-20-0x00000000019B0000-0x0000000001BBF000-memory.dmp

    Filesize

    2.1MB

  • memory/3036-27-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-24-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/3036-23-0x00000000019B0000-0x0000000001BBF000-memory.dmp

    Filesize

    2.1MB

  • memory/3036-50-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/3036-14-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/3036-51-0x0000000005450000-0x000000000585B000-memory.dmp

    Filesize

    4.0MB

  • memory/3036-47-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/3036-46-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-45-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-13-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/3036-43-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-42-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-41-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-40-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-39-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-38-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-30-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/3036-55-0x0000000000290000-0x0000000000297000-memory.dmp

    Filesize

    28KB