Analysis

  • max time kernel
    158s
  • max time network
    164s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    13/03/2024, 08:06

General

  • Target

    c562dc58e71fd79abd570506dfa5f123.exe

  • Size

    10.2MB

  • MD5

    c562dc58e71fd79abd570506dfa5f123

  • SHA1

    493df28d868ae1b809620c8e5b25d934b9e639f0

  • SHA256

    341c5f516b4e4557f25b162811efabca0135d390c00b061dce9f82608afe04cf

  • SHA512

    65884b9c366cb07f9244eaa697194d911e486a709dbbe40ab042af6240d979405fceca905e145e75dd266655f32c9fa8995bf22e32a27e461c4c125e0e073442

  • SSDEEP

    49152:w1yvllllllllllllllllllllllllllllllllllllllllllllllllllllllllllln:wA

Malware Config

Extracted

Family

tofsee

C2

43.231.4.7

lazystax.ru

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
  • 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
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c562dc58e71fd79abd570506dfa5f123.exe
    "C:\Users\Admin\AppData\Local\Temp\c562dc58e71fd79abd570506dfa5f123.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2496
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\xpmlehnv\
      2⤵
        PID:2752
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\qhdkbaei.exe" C:\Windows\SysWOW64\xpmlehnv\
        2⤵
          PID:2680
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create xpmlehnv binPath= "C:\Windows\SysWOW64\xpmlehnv\qhdkbaei.exe /d\"C:\Users\Admin\AppData\Local\Temp\c562dc58e71fd79abd570506dfa5f123.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:180
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description xpmlehnv "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:1868
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start xpmlehnv
          2⤵
          • Launches sc.exe
          PID:3628
        • 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:2672
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2496 -s 1260
          2⤵
          • Program crash
          PID:2368
      • C:\Windows\SysWOW64\xpmlehnv\qhdkbaei.exe
        C:\Windows\SysWOW64\xpmlehnv\qhdkbaei.exe /d"C:\Users\Admin\AppData\Local\Temp\c562dc58e71fd79abd570506dfa5f123.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:4964
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:4656
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4964 -s 508
          2⤵
          • Program crash
          PID:2852
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 456 -p 2496 -ip 2496
        1⤵
          PID:4240
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 480 -p 4964 -ip 4964
          1⤵
            PID:2724

          Network

                MITRE ATT&CK Enterprise v15

                Replay Monitor

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                Downloads

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

                  Filesize

                  4.7MB

                  MD5

                  11134148481de14b9f1bc616ff19a4ad

                  SHA1

                  87d2b5f1ba01ade32815a349b0216d301629d7ff

                  SHA256

                  ec1d14b359980ef724ee1ffe269297b983fbfc1558f37e32ec04e8b298909e53

                  SHA512

                  79a2dbc4fc05462a539dc3d94be9c837ad276bcdab6b681bcb15ddcb32d77960b95ab3c341f7c72c0582a377cca3379418393de720349ec536efc660b0d21434

                • C:\Windows\SysWOW64\xpmlehnv\qhdkbaei.exe

                  Filesize

                  8.4MB

                  MD5

                  7c782497c27e7a0b96c0600dc659b54f

                  SHA1

                  5d538b139a9b1f36a6dba0d59c8b15963273c4b2

                  SHA256

                  8ec00e76b457eefb0ead69fdbd42d5a184d48beb06b07e9f892efb31fd7b4d65

                  SHA512

                  baea905017c78d542330ab9a303a2235117e8de04c96fdbde02adb9739a17a635bc1ecfe8534a2b7765edea3bf1f21343c1582c4e57aa08d862040e1c883e301

                • memory/2496-8-0x0000000000DC0000-0x0000000000DD3000-memory.dmp

                  Filesize

                  76KB

                • memory/2496-4-0x0000000000400000-0x0000000000C20000-memory.dmp

                  Filesize

                  8.1MB

                • memory/2496-2-0x0000000000DC0000-0x0000000000DD3000-memory.dmp

                  Filesize

                  76KB

                • memory/2496-7-0x0000000000400000-0x0000000000C20000-memory.dmp

                  Filesize

                  8.1MB

                • memory/2496-1-0x0000000000EA0000-0x0000000000FA0000-memory.dmp

                  Filesize

                  1024KB

                • memory/4656-11-0x0000000000D20000-0x0000000000D35000-memory.dmp

                  Filesize

                  84KB

                • memory/4656-16-0x0000000000D20000-0x0000000000D35000-memory.dmp

                  Filesize

                  84KB

                • memory/4656-18-0x0000000000D20000-0x0000000000D35000-memory.dmp

                  Filesize

                  84KB

                • memory/4656-19-0x0000000000D20000-0x0000000000D35000-memory.dmp

                  Filesize

                  84KB

                • memory/4964-10-0x0000000000EA0000-0x0000000000FA0000-memory.dmp

                  Filesize

                  1024KB

                • memory/4964-12-0x0000000000400000-0x0000000000C20000-memory.dmp

                  Filesize

                  8.1MB

                • memory/4964-17-0x0000000000400000-0x0000000000C20000-memory.dmp

                  Filesize

                  8.1MB