Analysis

  • max time kernel
    58s
  • max time network
    59s
  • platform
    windows7_x64
  • resource
    win7-20220812-en
  • resource tags

    arch:x64arch:x86image:win7-20220812-enlocale:en-usos:windows7-x64system
  • submitted
    23/12/2022, 01:31

General

  • Target

    file.exe

  • Size

    2.0MB

  • MD5

    33c01c931d646f2282076738f61386d2

  • SHA1

    d4092f24705d91a54c2b79553cc26c04451c96a2

  • SHA256

    876aa06eb3062b728e3507fdf753bac180b9a1e57ff8ed46078367f9d41dd745

  • SHA512

    5ba2d4ee6659d6b0d629074b1814ef58602b27f4d067fa052df0228482f81966c48765e03004a3cb7a3a28c4470fc9d728ae426786e9675ee839cd7b1737062b

  • SSDEEP

    49152:/V9rSMgv1gTfLKegeI3JnspSiYvy/eQGpCQn2CH6EWP7p3d:/VzLK9CS7T2XEGdd

Score
10/10

Malware Config

Extracted

Family

nymaim

C2

45.139.105.171

85.31.46.167

Signatures

  • NyMaim

    NyMaim is a malware with various capabilities written in C++ and first seen in 2013.

  • Executes dropped EXE 3 IoCs
  • Loads dropped DLL 10 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 17 IoCs
  • Enumerates physical storage devices 1 TTPs

    Attempts to interact with connected storage/optical drive(s). Likely ransomware behaviour.

  • Kills process with taskkill 1 IoCs
  • Suspicious behavior: EnumeratesProcesses 3 IoCs
  • Suspicious use of AdjustPrivilegeToken 3 IoCs
  • Suspicious use of WriteProcessMemory 35 IoCs

Processes

  • C:\Users\Admin\AppData\Local\Temp\file.exe
    "C:\Users\Admin\AppData\Local\Temp\file.exe"
    1⤵
    • Loads dropped DLL
    • Suspicious use of WriteProcessMemory
    PID:1956
    • C:\Users\Admin\AppData\Local\Temp\is-EPN6R.tmp\is-5C2M6.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-EPN6R.tmp\is-5C2M6.tmp" /SL4 $60126 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1800857 133120
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:1756
      • C:\Program Files (x86)\Split Files\SplitFiles117.exe
        "C:\Program Files (x86)\Split Files\SplitFiles117.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:1336
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RYJEQxj4zl6OH8.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:992
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles117.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles117.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1492
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles117.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:1980

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\Split Files\SplitFiles117.exe

          Filesize

          3.4MB

          MD5

          71f25f23a8f8004fc0ad8b744eaed10d

          SHA1

          e6bbab1f671f7a8d6fbbe5eaf48681e349367611

          SHA256

          ec15ad327570e4fbe7871075765a25f9afff36d8763f2e4bd4c894c86b31e02b

          SHA512

          693d8a8a6c37aa07d134af2cd48d4c705b2c22211cea356c57365c503d051fa8eedc41919f82338c92959b94d9da08d16150c5a53a7ed8e9918f9dea07984e4e

        • C:\Program Files (x86)\Split Files\SplitFiles117.exe

          Filesize

          3.4MB

          MD5

          71f25f23a8f8004fc0ad8b744eaed10d

          SHA1

          e6bbab1f671f7a8d6fbbe5eaf48681e349367611

          SHA256

          ec15ad327570e4fbe7871075765a25f9afff36d8763f2e4bd4c894c86b31e02b

          SHA512

          693d8a8a6c37aa07d134af2cd48d4c705b2c22211cea356c57365c503d051fa8eedc41919f82338c92959b94d9da08d16150c5a53a7ed8e9918f9dea07984e4e

        • C:\Users\Admin\AppData\Local\Temp\is-EPN6R.tmp\is-5C2M6.tmp

          Filesize

          723KB

          MD5

          7fd7ec3d32ed2a377fa18e8931475b2e

          SHA1

          30b386da1750701f78cbf65550f32661d8a4175f

          SHA256

          0290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455

          SHA512

          db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334

        • C:\Users\Admin\AppData\Local\Temp\is-EPN6R.tmp\is-5C2M6.tmp

          Filesize

          723KB

          MD5

          7fd7ec3d32ed2a377fa18e8931475b2e

          SHA1

          30b386da1750701f78cbf65550f32661d8a4175f

          SHA256

          0290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455

          SHA512

          db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RYJEQxj4zl6OH8.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RYJEQxj4zl6OH8.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Program Files (x86)\Split Files\SplitFiles117.exe

          Filesize

          3.4MB

          MD5

          71f25f23a8f8004fc0ad8b744eaed10d

          SHA1

          e6bbab1f671f7a8d6fbbe5eaf48681e349367611

          SHA256

          ec15ad327570e4fbe7871075765a25f9afff36d8763f2e4bd4c894c86b31e02b

          SHA512

          693d8a8a6c37aa07d134af2cd48d4c705b2c22211cea356c57365c503d051fa8eedc41919f82338c92959b94d9da08d16150c5a53a7ed8e9918f9dea07984e4e

        • \Program Files (x86)\Split Files\SplitFiles117.exe

          Filesize

          3.4MB

          MD5

          71f25f23a8f8004fc0ad8b744eaed10d

          SHA1

          e6bbab1f671f7a8d6fbbe5eaf48681e349367611

          SHA256

          ec15ad327570e4fbe7871075765a25f9afff36d8763f2e4bd4c894c86b31e02b

          SHA512

          693d8a8a6c37aa07d134af2cd48d4c705b2c22211cea356c57365c503d051fa8eedc41919f82338c92959b94d9da08d16150c5a53a7ed8e9918f9dea07984e4e

        • \Program Files (x86)\Split Files\SplitFiles117.exe

          Filesize

          3.4MB

          MD5

          71f25f23a8f8004fc0ad8b744eaed10d

          SHA1

          e6bbab1f671f7a8d6fbbe5eaf48681e349367611

          SHA256

          ec15ad327570e4fbe7871075765a25f9afff36d8763f2e4bd4c894c86b31e02b

          SHA512

          693d8a8a6c37aa07d134af2cd48d4c705b2c22211cea356c57365c503d051fa8eedc41919f82338c92959b94d9da08d16150c5a53a7ed8e9918f9dea07984e4e

        • \Users\Admin\AppData\Local\Temp\is-EPN6R.tmp\is-5C2M6.tmp

          Filesize

          723KB

          MD5

          7fd7ec3d32ed2a377fa18e8931475b2e

          SHA1

          30b386da1750701f78cbf65550f32661d8a4175f

          SHA256

          0290cf819c841a17d433eb1f768d2bad4ad57db003563a925688b1c86bef5455

          SHA512

          db2ac34c30b89c2551d9e16de7d748e4a984141c889707a9edd165f328e75260ff6fb8d7383fb7c7fcf10000c08a10af03a50ce7b3665a8e935c0d5d66e59334

        • \Users\Admin\AppData\Local\Temp\is-STGIE.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-STGIE.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-STGIE.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RYJEQxj4zl6OH8.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RYJEQxj4zl6OH8.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\RYJEQxj4zl6OH8.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/1336-74-0x0000000000400000-0x0000000001560000-memory.dmp

          Filesize

          17.4MB

        • memory/1336-91-0x0000000000400000-0x0000000001560000-memory.dmp

          Filesize

          17.4MB

        • memory/1336-76-0x0000000001AF0000-0x0000000002C50000-memory.dmp

          Filesize

          17.4MB

        • memory/1336-77-0x0000000000400000-0x0000000001560000-memory.dmp

          Filesize

          17.4MB

        • memory/1336-78-0x0000000000400000-0x0000000001560000-memory.dmp

          Filesize

          17.4MB

        • memory/1336-95-0x0000000000400000-0x0000000001560000-memory.dmp

          Filesize

          17.4MB

        • memory/1336-75-0x0000000001AF0000-0x0000000002C50000-memory.dmp

          Filesize

          17.4MB

        • memory/1336-86-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/1756-90-0x0000000003890000-0x00000000049F0000-memory.dmp

          Filesize

          17.4MB

        • memory/1756-73-0x0000000003890000-0x00000000049F0000-memory.dmp

          Filesize

          17.4MB

        • memory/1956-69-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1956-54-0x0000000075141000-0x0000000075143000-memory.dmp

          Filesize

          8KB

        • memory/1956-55-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1956-97-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB