Analysis

  • max time kernel
    149s
  • max time network
    150s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240226-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240226-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/03/2024, 18:10

General

  • Target

    dea2ca171f528876b5bb42ac2630b2fb.exe

  • Size

    11.8MB

  • MD5

    dea2ca171f528876b5bb42ac2630b2fb

  • SHA1

    3ad94d0eb736834da2689c6b806906deaf0f2a60

  • SHA256

    ffbe4fc61de6a70ab99966df71a5b4ebf80ae6646020679a8a27e450b9b4240b

  • SHA512

    e76389468c8b90a28e211c4de6a8873ae3c51cdd43feec7ef359ba6fab325004c718ac87e9a6e11850a20abfd5ede120d506f48f83ff5487a07e7f1193ffc585

  • SSDEEP

    98304:vjhd88888888888888888888888888888888888888888888888888888888888Q:v

Malware Config

Extracted

Family

tofsee

C2

176.111.174.19

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\dea2ca171f528876b5bb42ac2630b2fb.exe
    "C:\Users\Admin\AppData\Local\Temp\dea2ca171f528876b5bb42ac2630b2fb.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:2288
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\jouqeiiz\
      2⤵
        PID:1620
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\zxkodhwr.exe" C:\Windows\SysWOW64\jouqeiiz\
        2⤵
          PID:4764
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create jouqeiiz binPath= "C:\Windows\SysWOW64\jouqeiiz\zxkodhwr.exe /d\"C:\Users\Admin\AppData\Local\Temp\dea2ca171f528876b5bb42ac2630b2fb.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:4568
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description jouqeiiz "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:3932
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start jouqeiiz
          2⤵
          • Launches sc.exe
          PID:4380
        • 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:640
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2288 -s 1164
          2⤵
          • Program crash
          PID:412
      • C:\Windows\SysWOW64\jouqeiiz\zxkodhwr.exe
        C:\Windows\SysWOW64\jouqeiiz\zxkodhwr.exe /d"C:\Users\Admin\AppData\Local\Temp\dea2ca171f528876b5bb42ac2630b2fb.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:2448
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:1856
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 2448 -s 248
          2⤵
          • Program crash
          PID:4132
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 444 -p 2288 -ip 2288
        1⤵
          PID:2404
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 428 -p 2448 -ip 2448
          1⤵
            PID:2204

          Network

          MITRE ATT&CK Enterprise v15

          Replay Monitor

          Loading Replay Monitor...

          Downloads

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

            Filesize

            13.3MB

            MD5

            3387106eaf8f2685510eda12ec90a265

            SHA1

            d811216c46c75f76087ba5d5778f041f0ba98f09

            SHA256

            7ab76683fd94ab87a179d6e50f112dca3442d50ce19e6774eef074ce2b6057f1

            SHA512

            c733b7ecb6e79f22227a6f2f8954a91fca1604cf42f8a84fb293a7856bf4c5464ae4ce988cc5c159981f3221ac21d84395f40d66107125c125f13ae6c8337b2e

          • C:\Windows\SysWOW64\jouqeiiz\zxkodhwr.exe

            Filesize

            12.7MB

            MD5

            92023058260097913b5c2347773fd13d

            SHA1

            0fc493532bd64ea8c2904ee73c7bca3f52710356

            SHA256

            61ead434ce52c645f8fd0a17b5ca6a8aa5d594e7b98458090f7fe4932a5ae203

            SHA512

            51ea6f0473ff8df1ec760974c8b1cc727ff936c37c7a8c2e5f55bbeea85018d5169853fe5ce3f23d5d724339fa6bef18d8678570e349c9c40254e26b65d62502

          • memory/1856-12-0x00000000008C0000-0x00000000008D5000-memory.dmp

            Filesize

            84KB

          • memory/1856-19-0x00000000008C0000-0x00000000008D5000-memory.dmp

            Filesize

            84KB

          • memory/1856-17-0x00000000008C0000-0x00000000008D5000-memory.dmp

            Filesize

            84KB

          • memory/1856-16-0x00000000008C0000-0x00000000008D5000-memory.dmp

            Filesize

            84KB

          • memory/1856-15-0x00000000008C0000-0x00000000008D5000-memory.dmp

            Filesize

            84KB

          • memory/2288-7-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB

          • memory/2288-1-0x0000000000590000-0x0000000000690000-memory.dmp

            Filesize

            1024KB

          • memory/2288-8-0x0000000002070000-0x0000000002083000-memory.dmp

            Filesize

            76KB

          • memory/2288-3-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB

          • memory/2288-2-0x0000000002070000-0x0000000002083000-memory.dmp

            Filesize

            76KB

          • memory/2448-10-0x0000000000690000-0x0000000000790000-memory.dmp

            Filesize

            1024KB

          • memory/2448-11-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB

          • memory/2448-18-0x0000000000400000-0x000000000045D000-memory.dmp

            Filesize

            372KB