Analysis

  • max time kernel
    152s
  • max time network
    155s
  • 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, 03:44

General

  • Target

    c4e30adbc0004c8b24f86e36cfff81f7.exe

  • Size

    13.0MB

  • MD5

    c4e30adbc0004c8b24f86e36cfff81f7

  • SHA1

    e77b025e8ae17a4c8485929593118423f745423b

  • SHA256

    901847a959678fa8c5a673996b31303d6de209e124ad922debe57f019c38fe25

  • SHA512

    460e5b118caa460ea144fa9d03bb09aa80085be28d3890dc0c03761a773f15d20e57e9e0a4886ba82fcc3a89d80ad36a44972c60e603d3bf19397ae0a8c5f21f

  • SSDEEP

    49152:NQsPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPPP:NQ

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).

  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe
    "C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4612
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\oufiyglm\
      2⤵
        PID:4852
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\vvualzgj.exe" C:\Windows\SysWOW64\oufiyglm\
        2⤵
          PID:3232
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create oufiyglm binPath= "C:\Windows\SysWOW64\oufiyglm\vvualzgj.exe /d\"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:3328
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description oufiyglm "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:772
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start oufiyglm
          2⤵
          • Launches sc.exe
          PID:4172
        • 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:4804
      • C:\Windows\SysWOW64\oufiyglm\vvualzgj.exe
        C:\Windows\SysWOW64\oufiyglm\vvualzgj.exe /d"C:\Users\Admin\AppData\Local\Temp\c4e30adbc0004c8b24f86e36cfff81f7.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:656
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:3100
      • C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe
        "C:\Program Files (x86)\Microsoft\Edge\Application\msedge.exe" --type=utility --utility-sub-type=asset_store.mojom.AssetStoreService --lang=en-US --service-sandbox-type=asset_store_service --no-appcompat-clear --mojo-platform-channel-handle=3940 --field-trial-handle=2284,i,15722001240173834669,15048020084704567542,262144 --variations-seed-version /prefetch:8
        1⤵
          PID:1592

        Network

              MITRE ATT&CK Enterprise v15

              Replay Monitor

              Loading Replay Monitor...

              Downloads

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

                Filesize

                2.7MB

                MD5

                9ce7c16f8a117f83e95fa911a36bdc9d

                SHA1

                57ffddcaea9c8964903657b7a3b13bfc4c2fb315

                SHA256

                0b3d1e861cd53804c95b1b9062b18fceba2cde8c159a3197958e6901826837f6

                SHA512

                4c5786c56a6edcb54e2450d18a521408f7513b38028575e05d9a30bcc38009d65a0eab3c43f7414b021e40ef013c59ccdb921d8876172deac52cbca9e2c2abd7

              • C:\Windows\SysWOW64\oufiyglm\vvualzgj.exe

                Filesize

                12.1MB

                MD5

                9878ab660d43259b25df192d9a1a5ed4

                SHA1

                d5412da0f7608058918c322cc143bb771f25f16f

                SHA256

                2795f3ed9b3e88edb0b8afe5e4b763cd6105d9a8ca18ae14bfd58a5ed9e4fb5e

                SHA512

                348a99369467a0c864d73b2c22e84c09c89ad014448361c86f9fcbb909e10093c5b8c4032f24c176cbfc82e206eed379a3c08283784477633468dd36e9c2afc9

              • memory/656-12-0x0000000000400000-0x0000000000C56000-memory.dmp

                Filesize

                8.3MB

              • memory/656-9-0x0000000000400000-0x0000000000C56000-memory.dmp

                Filesize

                8.3MB

              • memory/656-11-0x0000000000E50000-0x0000000000F50000-memory.dmp

                Filesize

                1024KB

              • memory/656-14-0x0000000000400000-0x0000000000C56000-memory.dmp

                Filesize

                8.3MB

              • memory/3100-13-0x0000000000470000-0x0000000000485000-memory.dmp

                Filesize

                84KB

              • memory/3100-17-0x0000000000470000-0x0000000000485000-memory.dmp

                Filesize

                84KB

              • memory/3100-18-0x0000000000470000-0x0000000000485000-memory.dmp

                Filesize

                84KB

              • memory/3100-19-0x0000000000470000-0x0000000000485000-memory.dmp

                Filesize

                84KB

              • memory/4612-5-0x0000000000400000-0x0000000000C56000-memory.dmp

                Filesize

                8.3MB

              • memory/4612-4-0x0000000000400000-0x0000000000C56000-memory.dmp

                Filesize

                8.3MB

              • memory/4612-7-0x0000000000400000-0x0000000000C56000-memory.dmp

                Filesize

                8.3MB

              • memory/4612-2-0x0000000000DF0000-0x0000000000EF0000-memory.dmp

                Filesize

                1024KB

              • memory/4612-0-0x0000000000400000-0x0000000000C56000-memory.dmp

                Filesize

                8.3MB