Analysis

  • max time kernel
    57s
  • max time network
    60s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20241007-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13-10-2024 19:46

General

  • Target

    79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe

  • Size

    237KB

  • MD5

    e180178b04f30c79a29231d10dbf3549

  • SHA1

    31dec58acfcbf1f9b60a53ca6a0e589123106450

  • SHA256

    79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753

  • SHA512

    7036bcead8bcbaa1e40158b78cdcf5fa137f14a330670bfafca807c237eb4779a35a81a0be78c8a10358346a3adb60a737ca3e4699660f6117b36b470c6d6e9f

  • SSDEEP

    3072:ALEeqY70pT7Ov4epeBWsj5zEqONJUFqQj1yw7:ALEHRpT7cxM1XFE

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.

  • Program crash 2 IoCs
  • 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\79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe
    "C:\Users\Admin\AppData\Local\Temp\79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:2704
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\kwgggard\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:2260
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\lajwipbe.exe" C:\Windows\SysWOW64\kwgggard\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:1216
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create kwgggard binPath= "C:\Windows\SysWOW64\kwgggard\lajwipbe.exe /d\"C:\Users\Admin\AppData\Local\Temp\79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1452
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description kwgggard "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:4020
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start kwgggard
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:2452
    • 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:32
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 2704 -s 1296
      2⤵
      • Program crash
      PID:560
  • C:\Windows\SysWOW64\kwgggard\lajwipbe.exe
    C:\Windows\SysWOW64\kwgggard\lajwipbe.exe /d"C:\Users\Admin\AppData\Local\Temp\79304d3709f4266d76e318d24d5863b3cc14a8fb64bc02145fbf23d398803753.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:868
    • 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:3456
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 868 -s 508
      2⤵
      • Program crash
      PID:452
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 404 -p 2704 -ip 2704
    1⤵
      PID:3128
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 420 -p 868 -ip 868
      1⤵
        PID:5088

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

      Loading Replay Monitor...

      Downloads

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

        Filesize

        10.8MB

        MD5

        dc0016a1e13a360775efe00839070eef

        SHA1

        4698b48b352590c520a225961784166a6f3b67c4

        SHA256

        ece0cd31df2269251b8930b4799794623ba515b44f912ec0ea688f9ba55ef207

        SHA512

        ca0e85bc9aa5f3c36fd21ba960c0bb8c63498b288923fb33caed6c07839b20e8d1d28c26030edb81e22abfcf6fa836dda309100816f79ddc51f7fee13b81fff4

      • memory/868-15-0x0000000000400000-0x0000000002B3E000-memory.dmp

        Filesize

        39.2MB

      • memory/2704-2-0x0000000002FA0000-0x0000000002FB3000-memory.dmp

        Filesize

        76KB

      • memory/2704-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2704-9-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/2704-8-0x0000000002FA0000-0x0000000002FB3000-memory.dmp

        Filesize

        76KB

      • memory/2704-7-0x0000000000400000-0x0000000002B3E000-memory.dmp

        Filesize

        39.2MB

      • memory/2704-1-0x0000000002CA0000-0x0000000002DA0000-memory.dmp

        Filesize

        1024KB

      • memory/3456-42-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-37-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-13-0x0000000000590000-0x00000000005A5000-memory.dmp

        Filesize

        84KB

      • memory/3456-17-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB

      • memory/3456-47-0x0000000001BE0000-0x0000000001BE5000-memory.dmp

        Filesize

        20KB

      • memory/3456-51-0x0000000007380000-0x000000000778B000-memory.dmp

        Filesize

        4.0MB

      • memory/3456-52-0x0000000001BF0000-0x0000000001BF7000-memory.dmp

        Filesize

        28KB

      • memory/3456-48-0x0000000007380000-0x000000000778B000-memory.dmp

        Filesize

        4.0MB

      • memory/3456-44-0x0000000001BE0000-0x0000000001BE5000-memory.dmp

        Filesize

        20KB

      • memory/3456-43-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-11-0x0000000000590000-0x00000000005A5000-memory.dmp

        Filesize

        84KB

      • memory/3456-41-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-40-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-39-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-38-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-14-0x0000000000590000-0x00000000005A5000-memory.dmp

        Filesize

        84KB

      • memory/3456-36-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-35-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-34-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-33-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-32-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-31-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-30-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-29-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-28-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-27-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-24-0x0000000001B50000-0x0000000001B60000-memory.dmp

        Filesize

        64KB

      • memory/3456-21-0x0000000001B40000-0x0000000001B46000-memory.dmp

        Filesize

        24KB

      • memory/3456-20-0x0000000002400000-0x000000000260F000-memory.dmp

        Filesize

        2.1MB