Analysis

  • max time kernel
    57s
  • max time network
    58s
  • platform
    windows7_x64
  • resource
    win7-20221111-en
  • resource tags

    arch:x64arch:x86image:win7-20221111-enlocale:en-usos:windows7-x64system
  • submitted
    23/12/2022, 06:01

General

  • Target

    file.exe

  • Size

    1.9MB

  • MD5

    502315dcc1dcc875e9af2bc3e20620ce

  • SHA1

    d64ea454e8aeee2f77bc5164fd433ee1017c8880

  • SHA256

    b80ab645a7df57d4b6e81144448e5a45df1a82c6084897e7682bb501797c40d6

  • SHA512

    d0a26e6c2924346141719791f39f76ab9a1fbbee4fc780faa701f91a2df3e46b842ba79cc9f6ccbd2218f297a4ab8a002ad9fc3a3e4e8183bcfb6ab338a2f73a

  • SSDEEP

    49152:rc4bAuzEWJi3LmYx/krKdNHldID+o+mjaAprWP7p3z:rVbABWE7mYu+dNHldk+tmjaqGdz

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:1732
    • C:\Users\Admin\AppData\Local\Temp\is-9HVSD.tmp\is-HEVTO.tmp
      "C:\Users\Admin\AppData\Local\Temp\is-9HVSD.tmp\is-HEVTO.tmp" /SL4 $70122 "C:\Users\Admin\AppData\Local\Temp\file.exe" 1744512 133120
      2⤵
      • Executes dropped EXE
      • Loads dropped DLL
      • Drops file in Program Files directory
      • Suspicious use of AdjustPrivilegeToken
      • Suspicious use of WriteProcessMemory
      PID:852
      • C:\Program Files (x86)\Split Files\SplitFiles118.exe
        "C:\Program Files (x86)\Split Files\SplitFiles118.exe"
        3⤵
        • Executes dropped EXE
        • Loads dropped DLL
        • Suspicious behavior: EnumeratesProcesses
        • Suspicious use of WriteProcessMemory
        PID:428
        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\fMXoSAlSF7vt6N.exe
          4⤵
          • Executes dropped EXE
          • Loads dropped DLL
          PID:1868
        • C:\Windows\SysWOW64\cmd.exe
          "C:\Windows\System32\cmd.exe" /c taskkill /im "SplitFiles118.exe" /f & erase "C:\Program Files (x86)\Split Files\SplitFiles118.exe" & exit
          4⤵
          • Suspicious use of WriteProcessMemory
          PID:1556
          • C:\Windows\SysWOW64\taskkill.exe
            taskkill /im "SplitFiles118.exe" /f
            5⤵
            • Kills process with taskkill
            • Suspicious use of AdjustPrivilegeToken
            PID:632

Network

        MITRE ATT&CK Enterprise v6

        Replay Monitor

        Loading Replay Monitor...

        Downloads

        • C:\Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          f1daeeb6d9db2c80641d10e88de61449

          SHA1

          1c3e8820f89c8c78901b8981ad0f0629a2a67dc6

          SHA256

          93443076d5d49b117e27fa859e67299dfdc24306106080913e5c2681639f27b5

          SHA512

          180e7051110acce29d5f5c53abdf66c6b1d4f3f1f8daae96128eff828bf87e86cfc431061da3b35d969c495131465b57bdf0f775a967869f13de2a4beb5e3cce

        • C:\Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          f1daeeb6d9db2c80641d10e88de61449

          SHA1

          1c3e8820f89c8c78901b8981ad0f0629a2a67dc6

          SHA256

          93443076d5d49b117e27fa859e67299dfdc24306106080913e5c2681639f27b5

          SHA512

          180e7051110acce29d5f5c53abdf66c6b1d4f3f1f8daae96128eff828bf87e86cfc431061da3b35d969c495131465b57bdf0f775a967869f13de2a4beb5e3cce

        • C:\Users\Admin\AppData\Local\Temp\is-9HVSD.tmp\is-HEVTO.tmp

          Filesize

          723KB

          MD5

          703b4da86c2d38881230d26bc1051cb2

          SHA1

          13b9e7582e94cb6e4f703bc08a28c53cdc003019

          SHA256

          90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

          SHA512

          e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

        • C:\Users\Admin\AppData\Local\Temp\is-9HVSD.tmp\is-HEVTO.tmp

          Filesize

          723KB

          MD5

          703b4da86c2d38881230d26bc1051cb2

          SHA1

          13b9e7582e94cb6e4f703bc08a28c53cdc003019

          SHA256

          90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

          SHA512

          e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\fMXoSAlSF7vt6N.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • C:\Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\fMXoSAlSF7vt6N.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          f1daeeb6d9db2c80641d10e88de61449

          SHA1

          1c3e8820f89c8c78901b8981ad0f0629a2a67dc6

          SHA256

          93443076d5d49b117e27fa859e67299dfdc24306106080913e5c2681639f27b5

          SHA512

          180e7051110acce29d5f5c53abdf66c6b1d4f3f1f8daae96128eff828bf87e86cfc431061da3b35d969c495131465b57bdf0f775a967869f13de2a4beb5e3cce

        • \Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          f1daeeb6d9db2c80641d10e88de61449

          SHA1

          1c3e8820f89c8c78901b8981ad0f0629a2a67dc6

          SHA256

          93443076d5d49b117e27fa859e67299dfdc24306106080913e5c2681639f27b5

          SHA512

          180e7051110acce29d5f5c53abdf66c6b1d4f3f1f8daae96128eff828bf87e86cfc431061da3b35d969c495131465b57bdf0f775a967869f13de2a4beb5e3cce

        • \Program Files (x86)\Split Files\SplitFiles118.exe

          Filesize

          3.3MB

          MD5

          f1daeeb6d9db2c80641d10e88de61449

          SHA1

          1c3e8820f89c8c78901b8981ad0f0629a2a67dc6

          SHA256

          93443076d5d49b117e27fa859e67299dfdc24306106080913e5c2681639f27b5

          SHA512

          180e7051110acce29d5f5c53abdf66c6b1d4f3f1f8daae96128eff828bf87e86cfc431061da3b35d969c495131465b57bdf0f775a967869f13de2a4beb5e3cce

        • \Users\Admin\AppData\Local\Temp\is-9HVSD.tmp\is-HEVTO.tmp

          Filesize

          723KB

          MD5

          703b4da86c2d38881230d26bc1051cb2

          SHA1

          13b9e7582e94cb6e4f703bc08a28c53cdc003019

          SHA256

          90b8f255f68be9f092608be15074b6fc3c4be724ae82dae5adb390307b121c89

          SHA512

          e3d80bc78b41e24450effe46f713e9bf7fcd376141a3c6b3f20e3ec81c9c3ab85d300104b2dbbef9512f92a2b613dbc326899e442dc669490c1e192f79a7363b

        • \Users\Admin\AppData\Local\Temp\is-E17DJ.tmp\_iscrypt.dll

          Filesize

          2KB

          MD5

          a69559718ab506675e907fe49deb71e9

          SHA1

          bc8f404ffdb1960b50c12ff9413c893b56f2e36f

          SHA256

          2f6294f9aa09f59a574b5dcd33be54e16b39377984f3d5658cda44950fa0f8fc

          SHA512

          e52e0aa7fe3f79e36330c455d944653d449ba05b2f9abee0914a0910c3452cfa679a40441f9ac696b3ccf9445cbb85095747e86153402fc362bb30ac08249a63

        • \Users\Admin\AppData\Local\Temp\is-E17DJ.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Local\Temp\is-E17DJ.tmp\_isetup\_shfoldr.dll

          Filesize

          22KB

          MD5

          92dc6ef532fbb4a5c3201469a5b5eb63

          SHA1

          3e89ff837147c16b4e41c30d6c796374e0b8e62c

          SHA256

          9884e9d1b4f8a873ccbd81f8ad0ae257776d2348d027d811a56475e028360d87

          SHA512

          9908e573921d5dbc3454a1c0a6c969ab8a81cc2e8b5385391d46b1a738fb06a76aa3282e0e58d0d2ffa6f27c85668cd5178e1500b8a39b1bbae04366ae6a86d3

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\fMXoSAlSF7vt6N.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\fMXoSAlSF7vt6N.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • \Users\Admin\AppData\Roaming\{846ee340-7039-11de-9d20-806e6f6e6963}\fMXoSAlSF7vt6N.exe

          Filesize

          72KB

          MD5

          3fb36cb0b7172e5298d2992d42984d06

          SHA1

          439827777df4a337cbb9fa4a4640d0d3fa1738b7

          SHA256

          27ae813ceff8aa56e9fa68c8e50bb1c6c4a01636015eac4bd8bf444afb7020d6

          SHA512

          6b39cb32d77200209a25080ac92bc71b1f468e2946b651023793f3585ee6034adc70924dbd751cf4a51b5e71377854f1ab43c2dd287d4837e7b544ff886f470c

        • memory/428-78-0x0000000000400000-0x0000000001549000-memory.dmp

          Filesize

          17.3MB

        • memory/428-75-0x0000000001BC0000-0x0000000002D09000-memory.dmp

          Filesize

          17.3MB

        • memory/428-76-0x0000000001BC0000-0x0000000002D09000-memory.dmp

          Filesize

          17.3MB

        • memory/428-77-0x0000000000400000-0x0000000001549000-memory.dmp

          Filesize

          17.3MB

        • memory/428-74-0x0000000000400000-0x0000000001549000-memory.dmp

          Filesize

          17.3MB

        • memory/428-96-0x0000000000400000-0x0000000001549000-memory.dmp

          Filesize

          17.3MB

        • memory/428-92-0x0000000000400000-0x0000000001549000-memory.dmp

          Filesize

          17.3MB

        • memory/428-88-0x0000000010000000-0x000000001001B000-memory.dmp

          Filesize

          108KB

        • memory/428-87-0x0000000000400000-0x0000000001549000-memory.dmp

          Filesize

          17.3MB

        • memory/852-86-0x0000000003860000-0x00000000049A9000-memory.dmp

          Filesize

          17.3MB

        • memory/852-70-0x0000000003860000-0x00000000049A9000-memory.dmp

          Filesize

          17.3MB

        • memory/1732-54-0x00000000759C1000-0x00000000759C3000-memory.dmp

          Filesize

          8KB

        • memory/1732-55-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1732-68-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB

        • memory/1732-98-0x0000000000400000-0x0000000000427000-memory.dmp

          Filesize

          156KB