Analysis

  • max time kernel
    149s
  • max time network
    155s
  • platform
    windows7_x64
  • resource
    win7-20240903-en
  • resource tags

    arch:x64arch:x86image:win7-20240903-enlocale:en-usos:windows7-x64system
  • submitted
    21-09-2024 21:38

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 7 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:2292
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kouuilia\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2240
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\pbjgmzfd.exe" C:\Windows\SysWOW64\kouuilia\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2644
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create kouuilia binPath= "C:\Windows\SysWOW64\kouuilia\pbjgmzfd.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:2908
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description kouuilia "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2896
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start kouuilia
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2740
    • 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:2592
  • C:\Windows\SysWOW64\kouuilia\pbjgmzfd.exe
    C:\Windows\SysWOW64\kouuilia\pbjgmzfd.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:2836
    • 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:2704

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    12.6MB

    MD5

    b8f9334b92ed1d243b22fe61bca340b5

    SHA1

    1325a0e150c1c39174717fda9d5e3275b6c0aac7

    SHA256

    9aa40eeb360b834635c2618b28268968f48c683c2635b98359134f0504d24f79

    SHA512

    1425efd1c1fcad50d843464e5cdcf7b70c734bee798413176668905b349e90fa1620eb521c3adb3e78df4bae4074142ce1d27d8c74a764fbf2524776aa1b2618

  • memory/2292-16-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2292-2-0x00000000002A0000-0x00000000002B3000-memory.dmp

    Filesize

    76KB

  • memory/2292-3-0x0000000000400000-0x0000000000415000-memory.dmp

    Filesize

    84KB

  • memory/2292-1-0x0000000002500000-0x0000000002600000-memory.dmp

    Filesize

    1024KB

  • memory/2292-14-0x0000000000400000-0x0000000002488000-memory.dmp

    Filesize

    32.5MB

  • memory/2292-15-0x00000000002A0000-0x00000000002B3000-memory.dmp

    Filesize

    76KB

  • memory/2704-40-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-45-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-23-0x00000000019E0000-0x0000000001BEF000-memory.dmp

    Filesize

    2.1MB

  • memory/2704-10-0x000000007EFDE000-0x000000007EFDF000-memory.dmp

    Filesize

    4KB

  • memory/2704-17-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2704-18-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2704-20-0x00000000019E0000-0x0000000001BEF000-memory.dmp

    Filesize

    2.1MB

  • memory/2704-46-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-31-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-54-0x0000000005430000-0x000000000583B000-memory.dmp

    Filesize

    4.0MB

  • memory/2704-24-0x0000000000110000-0x0000000000116000-memory.dmp

    Filesize

    24KB

  • memory/2704-55-0x0000000000140000-0x0000000000147000-memory.dmp

    Filesize

    28KB

  • memory/2704-51-0x0000000005430000-0x000000000583B000-memory.dmp

    Filesize

    4.0MB

  • memory/2704-50-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/2704-47-0x0000000000130000-0x0000000000135000-memory.dmp

    Filesize

    20KB

  • memory/2704-8-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2704-44-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-43-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-42-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-41-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-11-0x0000000000080000-0x0000000000095000-memory.dmp

    Filesize

    84KB

  • memory/2704-39-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-38-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-37-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-36-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-35-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-34-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-33-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-32-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-30-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2704-27-0x0000000000120000-0x0000000000130000-memory.dmp

    Filesize

    64KB

  • memory/2836-13-0x0000000000400000-0x0000000002488000-memory.dmp

    Filesize

    32.5MB