Analysis

  • max time kernel
    149s
  • max time network
    154s
  • platform
    windows10-2004_x64
  • resource
    win10v2004-20240319-en
  • resource tags

    arch:x64arch:x86image:win10v2004-20240319-enlocale:en-usos:windows10-2004-x64system
  • submitted
    25/03/2024, 17:32

General

  • Target

    de90eba22fa484e92a72c6834f6361a3.exe

  • Size

    13.5MB

  • MD5

    de90eba22fa484e92a72c6834f6361a3

  • SHA1

    97c0be0a75a5dba4e7f41a46cad23ed2bb705e2f

  • SHA256

    cb9dbbefdefc8029972629da6dc5f67bb76d6d2a71fe87f567551ef85dbbd2ff

  • SHA512

    ab2b80853123a972ded15d1d4d56c2f9393f24800a6ae07e4756daf40c6a77be2347ea2f05a2eb76fc4f2671c818999e6ecdf53e63d58fbaea588ca14dafc50f

  • SSDEEP

    12288:Lz5RuW/D2OpqMtGHo/zDq1ousycoJl//////////////////////////////////:qW/D2o5/Hq11coJ

Malware Config

Extracted

Family

tofsee

C2

defeatwax.ru

refabyd.info

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\de90eba22fa484e92a72c6834f6361a3.exe
    "C:\Users\Admin\AppData\Local\Temp\de90eba22fa484e92a72c6834f6361a3.exe"
    1⤵
    • Checks computer location settings
    • Suspicious use of WriteProcessMemory
    PID:4020
    • C:\Windows\SysWOW64\cmd.exe
      "C:\Windows\System32\cmd.exe" /C mkdir C:\Windows\SysWOW64\rrsbdrno\
      2⤵
        PID:4476
      • C:\Windows\SysWOW64\cmd.exe
        "C:\Windows\System32\cmd.exe" /C move /Y "C:\Users\Admin\AppData\Local\Temp\hziqnamg.exe" C:\Windows\SysWOW64\rrsbdrno\
        2⤵
          PID:2088
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" create rrsbdrno binPath= "C:\Windows\SysWOW64\rrsbdrno\hziqnamg.exe /d\"C:\Users\Admin\AppData\Local\Temp\de90eba22fa484e92a72c6834f6361a3.exe\"" type= own start= auto DisplayName= "wifi support"
          2⤵
          • Launches sc.exe
          PID:788
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" description rrsbdrno "wifi internet conection"
          2⤵
          • Launches sc.exe
          PID:4028
        • C:\Windows\SysWOW64\sc.exe
          "C:\Windows\System32\sc.exe" start rrsbdrno
          2⤵
          • Launches sc.exe
          PID:932
        • 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:2152
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 4020 -s 572
          2⤵
          • Program crash
          PID:3660
      • C:\Windows\SysWOW64\rrsbdrno\hziqnamg.exe
        C:\Windows\SysWOW64\rrsbdrno\hziqnamg.exe /d"C:\Users\Admin\AppData\Local\Temp\de90eba22fa484e92a72c6834f6361a3.exe"
        1⤵
        • Executes dropped EXE
        • Suspicious use of SetThreadContext
        • Suspicious use of WriteProcessMemory
        PID:456
        • C:\Windows\SysWOW64\svchost.exe
          svchost.exe
          2⤵
          • Sets service image path in registry
          • Deletes itself
          PID:4516
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -u -p 456 -s 440
          2⤵
          • Program crash
          PID:3972
      • C:\Windows\SysWOW64\WerFault.exe
        C:\Windows\SysWOW64\WerFault.exe -pss -s 408 -p 4020 -ip 4020
        1⤵
          PID:1484
        • C:\Windows\SysWOW64\WerFault.exe
          C:\Windows\SysWOW64\WerFault.exe -pss -s 436 -p 456 -ip 456
          1⤵
            PID:4680
          • 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=3772 --field-trial-handle=2284,i,13100272738549420251,6151825632958897606,262144 --variations-seed-version /prefetch:8
            1⤵
              PID:2296

            Network

            MITRE ATT&CK Enterprise v15

            Replay Monitor

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            Downloads

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

              Filesize

              12.6MB

              MD5

              2287f224f77276cd99139ed8422ac509

              SHA1

              e627c4dbdb93522525a78cf684f41611653b437a

              SHA256

              55428ba41f4eee4d0de38158380ff9d2aca9fd5497974d6daaea3890158c0279

              SHA512

              d9077eeeebc7473cf14519a3da3765cbb5d7560a4516f3aa5f771af1f8538f18bf37602a92476a7b72182fb9712d6229114ef8c21462504425c73a683bccdda6

            • memory/456-10-0x00000000006C0000-0x00000000007C0000-memory.dmp

              Filesize

              1024KB

            • memory/456-11-0x0000000000400000-0x000000000046D000-memory.dmp

              Filesize

              436KB

            • memory/456-18-0x0000000000400000-0x000000000046D000-memory.dmp

              Filesize

              436KB

            • memory/4020-3-0x0000000000400000-0x000000000046D000-memory.dmp

              Filesize

              436KB

            • memory/4020-2-0x0000000000610000-0x0000000000623000-memory.dmp

              Filesize

              76KB

            • memory/4020-8-0x0000000000400000-0x000000000046D000-memory.dmp

              Filesize

              436KB

            • memory/4020-9-0x0000000000610000-0x0000000000623000-memory.dmp

              Filesize

              76KB

            • memory/4020-1-0x0000000000660000-0x0000000000760000-memory.dmp

              Filesize

              1024KB

            • memory/4516-12-0x0000000000760000-0x0000000000775000-memory.dmp

              Filesize

              84KB

            • memory/4516-15-0x0000000000760000-0x0000000000775000-memory.dmp

              Filesize

              84KB

            • memory/4516-16-0x0000000000760000-0x0000000000775000-memory.dmp

              Filesize

              84KB

            • memory/4516-17-0x0000000000760000-0x0000000000775000-memory.dmp

              Filesize

              84KB

            • memory/4516-19-0x0000000000760000-0x0000000000775000-memory.dmp

              Filesize

              84KB