Analysis

  • max time kernel
    147s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240802-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240802-enlocale:en-usos:windows10-2004-x64system
  • submitted
    11-09-2024 12:46

General

  • Target

    50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe

  • Size

    13.2MB

  • MD5

    5c22dd0023f2924fd7804a0ddbf7ae78

  • SHA1

    280c5a888f5e30d0858b809611c47308b4e8bab4

  • SHA256

    50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8

  • SHA512

    437e049e5ba7477b857b57f56f038f1f7d33e9edc78a5ac853eec6604aabe1eea801e45d4b9655aac230e5885a3a1e920d1b2d6409a215934f2768d0e167e254

  • SSDEEP

    6144:UDVCynACXF+pI0zzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzzP:k8vmF+p

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.

  • 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
  • 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 5 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe
    "C:\Users\Admin\AppData\Local\Temp\50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4952
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\hdeadidb\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:3792
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\kwinkqpd.exe" C:\Windows\SysWOW64\hdeadidb\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4848
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create hdeadidb binPath= "C:\Windows\SysWOW64\hdeadidb\kwinkqpd.exe /d\"C:\Users\Admin\AppData\Local\Temp\50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5100
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description hdeadidb "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:5028
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start hdeadidb
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2464
    • 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:4592
  • C:\Windows\SysWOW64\hdeadidb\kwinkqpd.exe
    C:\Windows\SysWOW64\hdeadidb\kwinkqpd.exe /d"C:\Users\Admin\AppData\Local\Temp\50755e3eb1a407ef762cf957b272b483b314e911712c9e177b377efc8b1b5ea8.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:4252
    • C:\Windows\SysWOW64\svchost.exe
      svchost.exe
      2⤵
      • 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:1216

Network

MITRE ATT&CK Enterprise v15

Replay Monitor

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Downloads

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

    Filesize

    10.4MB

    MD5

    f5a9e219902d7e4e8d7a17e2e98b5851

    SHA1

    f7c0dd41ce9d760d93ad4e1915b0c9924bfead2b

    SHA256

    7a9503c47a71b850543fb431c73c9a4ba7a2b9ad59bd0767682e337a496519fc

    SHA512

    23a6cd5937e05bbb1438cfaac8b14b85023421608e45feb08edd5efb675e041fffd5505e384f29b986ba66b9de1a46e30b5e8b2c3728d1eac46805f944d7b7cf

  • memory/1216-3-0x0000000000340000-0x0000000000355000-memory.dmp

    Filesize

    84KB

  • memory/1216-6-0x0000000000340000-0x0000000000355000-memory.dmp

    Filesize

    84KB

  • memory/1216-7-0x0000000000340000-0x0000000000355000-memory.dmp

    Filesize

    84KB

  • memory/1216-8-0x0000000000340000-0x0000000000355000-memory.dmp

    Filesize

    84KB

  • memory/1216-9-0x0000000000340000-0x0000000000355000-memory.dmp

    Filesize

    84KB

  • memory/1216-12-0x0000000002400000-0x000000000260F000-memory.dmp

    Filesize

    2.1MB

  • memory/1216-21-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-46-0x00000000019F0000-0x00000000019F7000-memory.dmp

    Filesize

    28KB

  • memory/1216-45-0x0000000007280000-0x000000000768B000-memory.dmp

    Filesize

    4.0MB

  • memory/1216-42-0x0000000007280000-0x000000000768B000-memory.dmp

    Filesize

    4.0MB

  • memory/1216-38-0x00000000019E0000-0x00000000019E5000-memory.dmp

    Filesize

    20KB

  • memory/1216-37-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-36-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-35-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-34-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-33-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-32-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-31-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-30-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-29-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-28-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-27-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-26-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-25-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-24-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-22-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-18-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB

  • memory/1216-15-0x00000000008A0000-0x00000000008A6000-memory.dmp

    Filesize

    24KB

  • memory/1216-14-0x0000000002400000-0x000000000260F000-memory.dmp

    Filesize

    2.1MB

  • memory/1216-41-0x00000000019E0000-0x00000000019E5000-memory.dmp

    Filesize

    20KB

  • memory/1216-23-0x00000000009F0000-0x0000000000A00000-memory.dmp

    Filesize

    64KB