Resubmissions

10-11-2024 21:28

241110-1bhk6avgrr 10

Analysis

  • max time kernel
    150s
  • max time network
    192s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20241007-en
  • submitted
    10-11-2024 21:28

General

  • Target

    0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe

Malware Config

Extracted

Family

tofsee

C2

svartalfheim.top

jotunheim.name

Signatures

  • Tofsee

    Backdoor/botnet which carries out malicious activities based on commands from a C2 server.

  • Tofsee family
  • 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 7 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe
    "C:\Users\Admin\AppData\Local\Temp\0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe"
    1⤵
    • Checks computer location settings
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:1492
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\voqnngxq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:4768
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\ipptueoz.exe" C:\Windows\SysWOW64\voqnngxq\
      2⤵
      • System Location Discovery: System Language Discovery
      PID:5052
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" create voqnngxq binPath= "C:\Windows\SysWOW64\voqnngxq\ipptueoz.exe /d\"C:\Users\Admin\AppData\Local\Temp\0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe\"" type= own start= auto DisplayName= "wifi support"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1188
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" description voqnngxq "wifi internet conection"
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:1136
    • C:\Windows\SysWOW64\sc.exe
      "C:\Windows\System32\sc.exe" start voqnngxq
      2⤵
      • Launches sc.exe
      • System Location Discovery: System Language Discovery
      PID:3240
    • 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:4408
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 1492 -s 676
      2⤵
      • Program crash
      PID:3580
  • C:\Windows\SysWOW64\voqnngxq\ipptueoz.exe
    C:\Windows\SysWOW64\voqnngxq\ipptueoz.exe /d"C:\Users\Admin\AppData\Local\Temp\0488488429b7776b837be76cef378782ec22ebbd71fe37ae16b3f325e0742283.exe"
    1⤵
    • Executes dropped EXE
    • Suspicious use of SetThreadContext
    • System Location Discovery: System Language Discovery
    • Suspicious use of WriteProcessMemory
    PID:3432
    • 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:2580
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -u -p 3432 -s 536
      2⤵
      • Program crash
      PID:1148
  • C:\Windows\SysWOW64\WerFault.exe
    C:\Windows\SysWOW64\WerFault.exe -pss -s 452 -p 1492 -ip 1492
    1⤵
      PID:4308
    • C:\Windows\SysWOW64\WerFault.exe
      C:\Windows\SysWOW64\WerFault.exe -pss -s 536 -p 3432 -ip 3432
      1⤵
        PID:1540

      Network

      MITRE ATT&CK Enterprise v15

      Replay Monitor

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      Downloads

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

        Filesize

        13.4MB

        MD5

        15e549aeb017c22aa2c89b537721f0ee

        SHA1

        84d0af072ff924d336ead22718787a5937c424d7

        SHA256

        1c08984c8a80ec1a8be2eadf7e900de5229cc439b5bb9a17c028e8f8513440f0

        SHA512

        6e4d6087f3431a9f11bbe90396b150f01491d4a6557a9e157f12dc2a237435b84789758305dc6e85b79b1820e4d2b5754e3549c7c804935edac76b562f76b803

      • memory/1492-15-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1492-2-0x0000000000620000-0x0000000000633000-memory.dmp

        Filesize

        76KB

      • memory/1492-3-0x0000000000400000-0x0000000000415000-memory.dmp

        Filesize

        84KB

      • memory/1492-1-0x00000000006F0000-0x00000000007F0000-memory.dmp

        Filesize

        1024KB

      • memory/1492-13-0x0000000000400000-0x0000000000595000-memory.dmp

        Filesize

        1.6MB

      • memory/1492-14-0x0000000000620000-0x0000000000633000-memory.dmp

        Filesize

        76KB

      • memory/2580-46-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-41-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-11-0x0000000000E70000-0x0000000000E85000-memory.dmp

        Filesize

        84KB

      • memory/2580-45-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-56-0x00000000031E0000-0x00000000031E7000-memory.dmp

        Filesize

        28KB

      • memory/2580-18-0x0000000000E70000-0x0000000000E85000-memory.dmp

        Filesize

        84KB

      • memory/2580-19-0x0000000000E70000-0x0000000000E85000-memory.dmp

        Filesize

        84KB

      • memory/2580-22-0x0000000002C00000-0x0000000002E0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2580-51-0x00000000031D0000-0x00000000031D5000-memory.dmp

        Filesize

        20KB

      • memory/2580-55-0x0000000007B80000-0x0000000007F8B000-memory.dmp

        Filesize

        4.0MB

      • memory/2580-52-0x0000000007B80000-0x0000000007F8B000-memory.dmp

        Filesize

        4.0MB

      • memory/2580-48-0x00000000031D0000-0x00000000031D5000-memory.dmp

        Filesize

        20KB

      • memory/2580-47-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-24-0x0000000002C00000-0x0000000002E0F000-memory.dmp

        Filesize

        2.1MB

      • memory/2580-44-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-43-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-42-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-25-0x00000000021E0000-0x00000000021E6000-memory.dmp

        Filesize

        24KB

      • memory/2580-40-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-39-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-38-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-37-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-36-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-35-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-34-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-33-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-32-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-31-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/2580-28-0x00000000021F0000-0x0000000002200000-memory.dmp

        Filesize

        64KB

      • memory/3432-9-0x0000000000400000-0x0000000000595000-memory.dmp

        Filesize

        1.6MB

      • memory/3432-8-0x0000000000400000-0x0000000000595000-memory.dmp

        Filesize

        1.6MB

      • memory/3432-17-0x0000000000400000-0x0000000000595000-memory.dmp

        Filesize

        1.6MB

      • memory/3432-10-0x0000000000400000-0x0000000000595000-memory.dmp

        Filesize

        1.6MB