Analysis

  • max time kernel
    32s
  • max time network
    12s
  • platform
    windows7_x64
  • resource
    win7v20210408
  • submitted
    21-04-2021 18:57

General

  • Target

    FileOpenInstaller.exe

  • Size

    6.8MB

  • MD5

    ab92733eecc19ba622bea402e36217d7

  • SHA1

    0b989591194acec8782070b4d92db2963bfb17a0

  • SHA256

    1363a87825c3c707e04e181932702eb2258a9b87adfded21909ea58b722047e5

  • SHA512

    382b6fb60bbc4e8f9f8f0b8615f3bab247546f209aec35b2cab8a2038216319067a14073f1f0df8558183261fb387fb7bfb519d2052aa5bcfb09980a64f24213

Malware Config

Signatures

  • Creates new service(s) 1 TTPs
  • Executes dropped EXE 3 IoCs
  • Sets service image path in registry 2 TTPs
  • Loads dropped DLL 4 IoCs
  • Adds Run key to start application 2 TTPs 2 IoCs
  • Checks installed software on the system 1 TTPs

    Looks up Uninstall key entries in the registry to enumerate software on the system.

  • Drops file in Program Files directory 22 IoCs
  • Launches sc.exe

    Sc.exe is a Windows utlilty to control services on the system.

  • Suspicious behavior: EnumeratesProcesses 6 IoCs
  • Suspicious behavior: LoadsDriver 1 IoCs
  • Suspicious use of AdjustPrivilegeToken 25 IoCs
  • Suspicious use of FindShellTrayWindow 1 IoCs
  • Suspicious use of WriteProcessMemory 23 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\FileOpenInstaller.exe
    "C:\Users\Admin\AppData\Local\Temp\FileOpenInstaller.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:684
    • C:\Users\Admin\AppData\Local\Temp\is-E8BAO.tmp\FileOpenInstaller.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-E8BAO.tmp\FileOpenInstaller.tmp" /SL5="$20158,6349734,1320960,C:\Users\Admin\AppData\Local\Temp\FileOpenInstaller.exe"
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Adds Run key to start application
      • Drops file in Program Files directory
      • Suspicious behavior: EnumeratesProcesses
      • Suspicious use of FindShellTrayWindow
      • Suspicious use of WriteProcessMemory
      PID:2012
      • C:\Windows\system32\sc.exe
        "C:\Windows\system32\sc.exe" create FileOpenManager binpath= "\"C:\Program Files\FileOpen\Services\FileOpenManager64.exe\"" start= auto
        3⤵
          PID:688
        • C:\Windows\system32\sc.exe
          "C:\Windows\system32\sc.exe" description FileOpenManager "FileOpen Client Manager"
          3⤵
            PID:564
          • C:\Windows\system32\sc.exe
            "C:\Windows\system32\sc.exe" start FileOpenManager
            3⤵
              PID:576
            • C:\Program Files\FileOpen\Services\FileOpenBroker64.exe
              "C:\Program Files\FileOpen\Services\FileOpenBroker64.exe"
              3⤵
              • Executes dropped EXE
              • Suspicious use of AdjustPrivilegeToken
              PID:896
        • C:\Program Files\FileOpen\Services\FileOpenManager64.exe
          "C:\Program Files\FileOpen\Services\FileOpenManager64.exe"
          1⤵
          • Executes dropped EXE
          • Suspicious behavior: LoadsDriver
          • Suspicious use of AdjustPrivilegeToken
          PID:1020

        Network

        MITRE ATT&CK Matrix ATT&CK v6

        Persistence

        New Service

        1
        T1050

        Registry Run Keys / Startup Folder

        2
        T1060

        Privilege Escalation

        New Service

        1
        T1050

        Defense Evasion

        Modify Registry

        2
        T1112

        Discovery

        Query Registry

        1
        T1012

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files\FileOpen\Services\FileOpenBroker64.exe
          MD5

          c3cd4128718c650a824d72cad5b6bf4f

          SHA1

          ee21ba11ebd1c6bc912621e581b906e4ac5cdded

          SHA256

          8b50b94dafc6b5857eeeeb8e420449adf69fa900f6f7b63f49f467603bdeef2f

          SHA512

          bf36500e81bf82e2f53d9d375f0b0996655f47a8640e03b49ab4acc11a5fcf22f9fec3f4401d5f4daee51db9bfc4f4f1b9a506ecd6be1e0279536734180bcb73

        • C:\Program Files\FileOpen\Services\FileOpenManager64.exe
          MD5

          099126827a21b862cb71f37b4fda4ece

          SHA1

          d8036d5df3f66074b0ff110968fab1f7d42d9e94

          SHA256

          0c369c57f68fdf0dcfbd5aaa0f104ca1928873c69058a83c60cfd14588d904c8

          SHA512

          93c787f77634bc585a2e1602adde6e73c6717e740d8ec7bc53bfa24e56347c8ffd299c32bec001747bcc31f10d0607100c2f97acafe77bf263ce831c757b6f8c

        • C:\ProgramData\FileOpen\Updates\L10n\fotk_de.lcd
          MD5

          1ff1a88c097a10af0d2cb463bbb5e4c9

          SHA1

          d149b1d0bcd84fad9a4bd143e7837999bc840141

          SHA256

          3e077b1a201d71636dd045f7b2694afee90881df97704b012dc947c7429492a7

          SHA512

          82aa26f7e0d877a0bea8d55c57d4d6b98df283c04360c730e6ed385a589d16438f9bc00b80609b48c33028202661e7343dd4a13a53ae31b6c9a4d8c2e63d1023

        • C:\ProgramData\FileOpen\Updates\L10n\fotk_fr.lcd
          MD5

          02d3a1c956563ba31087ee811bcf1f41

          SHA1

          6bddfe58549c328d810b15b37bf93bcfcab1a14b

          SHA256

          e6dcd083958db6fb9a3fb75a9ed320638c3cbf97b69aa24aaf68e96fb644f9f1

          SHA512

          a385c69d7cfd88f637d3553beefa502563e9620fba1c502dbcb7cf868383f1cf86d6578fccce0ef6b5d0e246e1f94313ff6a3ac01b1529ac78df5f376b76c3e2

        • C:\ProgramData\FileOpen\Updates\L10n\fotk_ja.lcd
          MD5

          7dd5a9a2ed2e595e660eab7b06449720

          SHA1

          992cad591fb818a66dfec96cc32b5b94739692ff

          SHA256

          168ed420ab4ac7c5468362ee5804a1ee1bc2304b3a61884adf1d9e764e66f889

          SHA512

          2c335278e6e67fd26af6dcfc50417cb70ea35bdb4aba5185f023aec6ba1948f096677b4a6da3539b746cc79378f6dab82f386995cd56f3bd9f977815b11fe699

        • C:\ProgramData\FileOpen\Updates\L10n\fotk_zh.lcd
          MD5

          03f4d28b17ce89cfe4c288ef7225451f

          SHA1

          3470ad6103983daabee0d8494e891123bca9804a

          SHA256

          7c7509711730827da1a713398845a2e09adde8ecfca07db04b47f34eece52493

          SHA512

          50ebdba872c08d18c54aeba31c025de7203c0e1444cda541857715bb186358c8d8c186f0419edd9a5c02e03d98d44b95c0edc4549cf725578cebd667482a3326

        • C:\ProgramData\FileOpen\Updates\Lists\fotkBus.lcd
          MD5

          8c21d08ba2b447a7c85fa5575a3e57ee

          SHA1

          a07e68f1613ad29a8274a07b6ec03b6266c06f15

          SHA256

          bb6dfd0a1f9fa1658fa75bdc117f601398d9d132453ee7a7d1b858aed29e42f9

          SHA512

          0ab5767c4ee3d0cfba28174c8a3fb6bb9326e1bf66554aefd4549c41fa096deefe76a6150da3c577e6c99b40efd3151c0a96d6460f3dd266f5928156d58cf56a

        • C:\ProgramData\FileOpen\Updates\Lists\fotkCnfs.lcd
          MD5

          ca943a39a4f5dd13e54089690fec080a

          SHA1

          0dc95be92bf165a841d1881bc2a14212c31f4792

          SHA256

          fdf6d2cbf65edcf9e84b66d484ba0fd18fad427e3eb1bf332c94caddf1d7ec63

          SHA512

          ee0051b72252a61399e53288cd23eee59ca4a7139e941a07b750281cfcb77bfd143453bf86f54c03cad39cabeca7cec2c5e4d1dc1b8a41e16fb174fa131966fe

        • C:\ProgramData\FileOpen\Updates\Lists\fotkDrs.lcd
          MD5

          30fe73410c791d4bf1d7a1fdcea9e54a

          SHA1

          ed3eb0a5f503d1b7f84d19592249e0e7409e31eb

          SHA256

          366c3aa0a8f734b055d685d1b4783c95b2e1830b7f25319b3577ffa3e66aa2b5

          SHA512

          dd76385e04704077e0972db4bb58629538884a316f8b8ec5c75b7597b66d80a5c20c243a6ba70f67f4492c95bb86d04053e8f7d7dfd8cff5bc803b286c52ff2d

        • C:\ProgramData\FileOpen\Updates\Lists\fotkLngs.lcd
          MD5

          55d02da6997b22d40ac0bbd083d0d79e

          SHA1

          5802069ebc18e6b83ef9974e1e88a5dc9aef3f16

          SHA256

          323ca3057bbcd45288e40132953cd66b7f2aa1a403fa3d336f7e395fb51f94c3

          SHA512

          4b78f7b57fd666ada151cfef2abab34a09b5270be7f7651aef0aaa1263512c8b35dcb09b70481f010d10417f9d71d13b86a6a51dc77c0fdca6d50bc5561d69a5

        • C:\ProgramData\FileOpen\Updates\Lists\fotkLsts.lcd
          MD5

          de68d51f9bfed85374972fc4b778c7fe

          SHA1

          70cf0eb0a85e503f56d91404e3c25d140fa462f4

          SHA256

          3115d9807b7f4558fa79d09f3ddebcfd41af2fa4761b006f108f9817165f0665

          SHA512

          37fe62c56cdc889b321c650d87554715113710e081bae7b35f7c8d52def73a7c3e28fddacd3bbf48270bcbfaea27dfda49e0d5e6dec1a9ef9e8a1b88085ef53a

        • C:\ProgramData\FileOpen\Updates\Lists\fotkNis.lcd
          MD5

          7f9d763543f94ca15b7158ada872c7e4

          SHA1

          9661f3c85a6e583eb455e50488530d40b5fd6c56

          SHA256

          6e3c654da94bf2dab61704fa4787747da578df0ea8a7b808a7943e1d506fb373

          SHA512

          0f2acd1b623362b15c1d634b6e18e14452eae3ba6f984eeef2496094ebb258b62eda2ce607fc99f571eef54e92507650bb83ba2ebbeaac223d2346d343dea871

        • C:\ProgramData\FileOpen\Updates\Lists\fotkPrs.lcd
          MD5

          dd46349e256f66da49e6ed04dad039de

          SHA1

          32929544444286c63fa674f56bd19171eb851aab

          SHA256

          d658b0aa15c2e36ad2c4c08bced8693e525387822a1604daa26d81bbfb6df6b1

          SHA512

          29e9bdcbe21d95df93fabaf280b90c7ff860b64d692f2492ed642479c0306118f2032edb6e7fa216687efb963e71c4f691baa301060bae838916047b2ae782ef

        • C:\ProgramData\FileOpen\Updates\Lists\fotkRds.lcd
          MD5

          baba88923dacac1b9ffccd1caa783903

          SHA1

          bd9c1d4176b709671310eb31c197e54311df2e09

          SHA256

          06793859377ade0f42f713178559a3189b9118884cc9d783e98c36820beab899

          SHA512

          c834660d40616847458d21287692bb809101653ee8a29eb24aac7d7ac6d9967bd78866081216848e073d50ed2e30ef4219cc13bb494a5f6c0201b27cea5d0ed8

        • C:\Users\Admin\AppData\Local\Temp\is-E8BAO.tmp\FileOpenInstaller.tmp
          MD5

          9d8408c9bf6f711b668ef36084757f7d

          SHA1

          1c5fdb3445fbc80d7e7ab877424148155868d352

          SHA256

          63ed8734dd7859fadef2fc184d8a25f90efc898e321358c73e876d97f5ceec72

          SHA512

          60605cfc3a27cd3ad7ce73534405b17b671dce47177ddc2b7f72178e628d7a949d2924d552f738e8f4c837d86a148b78d687bd1885cc7efc37ebce3e06b07bde

        • C:\Users\Admin\AppData\Local\Temp\is-E8BAO.tmp\FileOpenInstaller.tmp
          MD5

          9d8408c9bf6f711b668ef36084757f7d

          SHA1

          1c5fdb3445fbc80d7e7ab877424148155868d352

          SHA256

          63ed8734dd7859fadef2fc184d8a25f90efc898e321358c73e876d97f5ceec72

          SHA512

          60605cfc3a27cd3ad7ce73534405b17b671dce47177ddc2b7f72178e628d7a949d2924d552f738e8f4c837d86a148b78d687bd1885cc7efc37ebce3e06b07bde

        • \Program Files\FileOpen\Services\FileOpenBroker64.exe
          MD5

          c3cd4128718c650a824d72cad5b6bf4f

          SHA1

          ee21ba11ebd1c6bc912621e581b906e4ac5cdded

          SHA256

          8b50b94dafc6b5857eeeeb8e420449adf69fa900f6f7b63f49f467603bdeef2f

          SHA512

          bf36500e81bf82e2f53d9d375f0b0996655f47a8640e03b49ab4acc11a5fcf22f9fec3f4401d5f4daee51db9bfc4f4f1b9a506ecd6be1e0279536734180bcb73

        • \Program Files\FileOpen\Services\FileOpenManager64.exe
          MD5

          099126827a21b862cb71f37b4fda4ece

          SHA1

          d8036d5df3f66074b0ff110968fab1f7d42d9e94

          SHA256

          0c369c57f68fdf0dcfbd5aaa0f104ca1928873c69058a83c60cfd14588d904c8

          SHA512

          93c787f77634bc585a2e1602adde6e73c6717e740d8ec7bc53bfa24e56347c8ffd299c32bec001747bcc31f10d0607100c2f97acafe77bf263ce831c757b6f8c

        • \Users\Admin\AppData\Local\Temp\is-E8BAO.tmp\FileOpenInstaller.tmp
          MD5

          9d8408c9bf6f711b668ef36084757f7d

          SHA1

          1c5fdb3445fbc80d7e7ab877424148155868d352

          SHA256

          63ed8734dd7859fadef2fc184d8a25f90efc898e321358c73e876d97f5ceec72

          SHA512

          60605cfc3a27cd3ad7ce73534405b17b671dce47177ddc2b7f72178e628d7a949d2924d552f738e8f4c837d86a148b78d687bd1885cc7efc37ebce3e06b07bde

        • \Users\Admin\AppData\Local\Temp\is-MPI5O.tmp\UtilDll.dll
          MD5

          79f2386cf7296e8661997193cf01baad

          SHA1

          726fea5eabc5b38981b1d6cc5b8be01212c90616

          SHA256

          101eba215ef5f833ec332da2c803fbff060eb55f32a88ec261b5c4192528e6dd

          SHA512

          123f4ffa772fde8f901abf12c49b78eb81975e5e5f38a8ef80c10b4ca08da422c42ee72f51155fc87a6726217a29b0e8bf22cb927347d324d41e87485c5eff7e

        • memory/564-70-0x0000000000000000-mapping.dmp
        • memory/576-71-0x0000000000000000-mapping.dmp
        • memory/684-60-0x0000000000400000-0x0000000000550000-memory.dmp
          Filesize

          1.3MB

        • memory/684-59-0x0000000075C71000-0x0000000075C73000-memory.dmp
          Filesize

          8KB

        • memory/688-69-0x0000000000000000-mapping.dmp
        • memory/896-77-0x000007FEFB9F1000-0x000007FEFB9F3000-memory.dmp
          Filesize

          8KB

        • memory/896-75-0x0000000000000000-mapping.dmp
        • memory/2012-66-0x00000000001D0000-0x00000000001D1000-memory.dmp
          Filesize

          4KB

        • memory/2012-63-0x0000000000000000-mapping.dmp