Analysis

  • max time kernel
    149s
  • max time network
    151s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240412-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240412-enlocale:en-usos:windows10-2004-x64system
  • submitted
    17-04-2024 13:35

General

  • Target

    04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe

  • Size

    233KB

  • MD5

    f81a2c93c44bfec11cdd55eb53dde5df

  • SHA1

    45cb3d7066113e86fff081e309265a797af0ef51

  • SHA256

    04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482

  • SHA512

    c9fc2a6239235aa0bf24e700665666c8500000bcc76dc8e26922f8cfc0f961949bf7fa04bf9877ea3254b9a5879752d1b3f75d945318c246770b507bc0b0199e

  • SSDEEP

    3072:LefNGJ/ceeYkb2BNog9oADOF4t0wC0NnpXIpKjVEqLDOO7n+MnIitmjXO9ZJwVQk:Le1GM+NobFm0wC0NpYpuVEqSFOTF

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) 1 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).

  • Program crash 2 IoCs
  • Modifies data under HKEY_USERS 6 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe
    "C:\Users\Admin\AppData\Local\Temp\04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4092
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\lgdfispi\
      2⤵
        PID:2332
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\fdsatjea.exe" C:\Windows\SysWOW64\lgdfispi\
        2⤵
          PID:2212
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create lgdfispi binPath= "C:\Windows\SysWOW64\lgdfispi\fdsatjea.exe /d\"C:\Users\Admin\AppData\Local\Temp\04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:684
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description lgdfispi "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:2356
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start lgdfispi
          2⤵
          • Launches sc.exe
          PID:3452
        • 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
          PID:5076
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4092 -s 1028
          2⤵
          • Program crash
          PID:4716
      • C:\Windows\SysWOW64\lgdfispi\fdsatjea.exe
        C:\Windows\SysWOW64\lgdfispi\fdsatjea.exe /d"C:\Users\Admin\AppData\Local\Temp\04ec244112b44e9592f9c5e45ab50e67e402f0704d8121678afe46117de90482.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:464
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          • Drops file in System32 directory
          • Modifies data under HKEY_USERS
          PID:4456
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 464 -s 532
          2⤵
          • Program crash
          PID:1840
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 464 -ip 464
        1⤵
          PID:4400
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 4092 -ip 4092
          1⤵
            PID:5072

          Network

          MITRE ATT&CK Matrix ATT&CK v13

          Persistence

          Create or Modify System Process

          2
          T1543

          Windows Service

          2
          T1543.003

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Privilege Escalation

          Create or Modify System Process

          2
          T1543

          Windows Service

          2
          T1543.003

          Boot or Logon Autostart Execution

          1
          T1547

          Registry Run Keys / Startup Folder

          1
          T1547.001

          Defense Evasion

          Impair Defenses

          1
          T1562

          Disable or Modify System Firewall

          1
          T1562.004

          Modify Registry

          1
          T1112

          Discovery

          Query Registry

          1
          T1012

          System Information Discovery

          2
          T1082

          Replay Monitor

          Loading Replay Monitor...

          Downloads

          • C:\Users\Admin\AppData\Local\Temp\fdsatjea.exe
            Filesize

            10.7MB

            MD5

            d82ba1075b01b6c31c3c4c37509ba2b4

            SHA1

            448dad44b7f1e2900f9c88b8a0686d56035e51d7

            SHA256

            b8c344820278b4de46e2b752919ec68ee1e3501c8aca304bd340e481245972d4

            SHA512

            253ab753a5778accb83cc0bb56b46ae056453e46a6d67b2fd1772e94837b3f979d906670b009ef646088db42b75cbdc0b78f7bfb980ea6fc8225aac802498464

          • memory/464-9-0x00000000006A0000-0x00000000007A0000-memory.dmp
            Filesize

            1024KB

          • memory/464-10-0x00000000004C0000-0x00000000004D3000-memory.dmp
            Filesize

            76KB

          • memory/464-11-0x0000000000400000-0x000000000043F000-memory.dmp
            Filesize

            252KB

          • memory/4092-16-0x0000000000400000-0x000000000043F000-memory.dmp
            Filesize

            252KB

          • memory/4092-2-0x0000000000510000-0x0000000000523000-memory.dmp
            Filesize

            76KB

          • memory/4092-4-0x0000000000400000-0x000000000043F000-memory.dmp
            Filesize

            252KB

          • memory/4092-1-0x0000000000550000-0x0000000000650000-memory.dmp
            Filesize

            1024KB

          • memory/4456-33-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-37-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-17-0x0000000000550000-0x0000000000565000-memory.dmp
            Filesize

            84KB

          • memory/4456-18-0x0000000000550000-0x0000000000565000-memory.dmp
            Filesize

            84KB

          • memory/4456-20-0x0000000000550000-0x0000000000565000-memory.dmp
            Filesize

            84KB

          • memory/4456-21-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/4456-24-0x0000000002600000-0x000000000280F000-memory.dmp
            Filesize

            2.1MB

          • memory/4456-25-0x00000000009F0000-0x00000000009F6000-memory.dmp
            Filesize

            24KB

          • memory/4456-28-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-34-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-8-0x0000000000550000-0x0000000000565000-memory.dmp
            Filesize

            84KB

          • memory/4456-32-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-31-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-35-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-36-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-14-0x0000000000550000-0x0000000000565000-memory.dmp
            Filesize

            84KB

          • memory/4456-40-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-39-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-38-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-41-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-44-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-43-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-45-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-47-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-52-0x0000000007A00000-0x0000000007E0B000-memory.dmp
            Filesize

            4.0MB

          • memory/4456-51-0x0000000001BD0000-0x0000000001BD5000-memory.dmp
            Filesize

            20KB

          • memory/4456-48-0x0000000001BD0000-0x0000000001BD5000-memory.dmp
            Filesize

            20KB

          • memory/4456-46-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-42-0x0000000001BA0000-0x0000000001BB0000-memory.dmp
            Filesize

            64KB

          • memory/4456-55-0x0000000007A00000-0x0000000007E0B000-memory.dmp
            Filesize

            4.0MB

          • memory/4456-56-0x0000000001BE0000-0x0000000001BE7000-memory.dmp
            Filesize

            28KB